uart_commands.c: added joytick test

is not limited to hard reset counts anymore

config.in

@@ -8,17 +8,21 @@ comment "General Setup"
 	choice 'Target MCU'           \
 	  "ATmega8        atmega8     \
 	   ATmega16       atmega16    \
+	   ATmega164      atmega164   \
+	   ATmega164P     atmega164p  \
 	   ATmega168      atmega168   \
 	   ATmega168P     atmega168p  \
 	   ATmega32       atmega32    \
+	   ATmega324      atmega324   \
+	   ATmega324P     atmega324p  \
 	   ATmega32U4     atmega32u4  \
 	   ATmega328      atmega328   \
-	   ATmega328p     atmega328p  \
+	   ATmega328P     atmega328p  \
 	   ATmega644      atmega644   \
-	   ATmega644p     atmega644p  \
+	   ATmega644P     atmega644p  \
 	   ATmega1280     atmega1280  \
 	   ATmega1284     atmega1284  \
-	   ATmega1284p    atmega1284p \
+	   ATmega1284P    atmega1284p \
 	   ATmega2560     atmega2560  \
 	   ATmega8515     atmega8515" \
 	   'ATmega32' MCU
@@ -62,9 +66,13 @@ source src/can/config.in
 ###############################################################################
 
 
+### UART Menu #################################################################
+source src/uart/config.in
+###############################################################################
+
+
 ### Borg Menu #################################################################
 dep_bool "Menu Support" MENU_SUPPORT $JOYSTICK_SUPPORT
-depends on JOYSTICK_SUPPORT
 ###############################################################################
 
 

defaults.mk

@@ -75,6 +75,20 @@ else
 				endif
 			endif
 			LIBS_SIM = -lglut -lpthread -lGL -lGLU -lm
+		else
+			ifeq ($(OSTYPE),OpenBSD)
+				CFLAGS_SIM = -g -I/usr/local/include -I/usr/X11R6/include -Wall -pedantic -std=c99 -O0
+				CFLAGS_SIM += -D_XOPEN_SOURCE=600
+				ifeq ($(MACHINE),amd64)
+					LDFLAGS_SIM = -L/usr/local/lib -L/usr/X11R6/lib -T ld_scripts/elf_x86_64_obsd.xd
+				else
+					ifeq ($(MACHINE),i386)
+						LDFLAGS_SIM = -L/usr/local/lib -L/usr/X11R6/lib -T ld_scripts/elf_i386_obsd.xd
+					else
+						$(warning $(n)$(n)Simulator build is only supported on i386 and amd64.$(n)$(n))
+					endif
+				endif
+				LIBS_SIM = -lglut -lpthread -lGL -lGLU -lm
 			else
 				ifeq ($(OSTYPE),Linux)
 					CFLAGS_SIM  = -g -Wall -pedantic -std=c99 -O0 -D_XOPEN_SOURCE=600
@@ -99,6 +113,8 @@ Currently supported platforms:$(n) \
 			endif
 		endif
 	endif
+endif
+
 ##############################################################################
 # the default target
 $(TARGET):
@@ -116,8 +132,8 @@ $(MAKETOPDIR)/config.mk:
 	@echo "#" >>$@
 	@echo "# Other flags you might want to tune: CPPFLAGS, LDFLAGS ..." >>$@
 	@echo "Created default config.mk, tune your settings there!"
--include $(MAKETOPDIR)/config.mk
 
+-include $(MAKETOPDIR)/config.mk
 
 ##############################################################################
 # configure load address for bootloader, if enabled
@@ -125,9 +141,7 @@ $(MAKETOPDIR)/config.mk:
 ifneq ($(MAKECMDGOALS),clean)
 	ifneq ($(MAKECMDGOALS),mrproper)
 		ifneq ($(MAKECMDGOALS),menuconfig)  
-
 			include $(MAKETOPDIR)/.config
-
 			CPPFLAGS += -DF_CPU=$(FREQ)UL -mmcu=$(MCU)
 
 			# flags for the linker, choose appropriate linker script
@@ -140,7 +154,6 @@ else
 					LDFLAGS += -T ld_scripts/avr5.x -Wl,-Map,image.map -mmcu=$(MCU)
 				endif
 			endif
-
 		endif # MAKECMDGOALS!=menuconfig
 	endif # MAKECMDGOALS!=mrproper
 endif # MAKECMDGOALS!=clean

ld_scripts/elf_i386_obsd.xd

@@ -0,0 +1,193 @@
+/* Script for ld -pie: link position independent executable */
+OUTPUT_FORMAT("elf32-i386", "elf32-i386",
+	      "elf32-i386")
+OUTPUT_ARCH(i386)
+ENTRY(_start)
+SEARCH_DIR("/usr/lib");
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+   __DYNAMIC = 0;    */
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ld_scripts/elf_x86_64_obsd.xd

@@ -0,0 +1,193 @@
+/* Default linker script, for normal executables */
+OUTPUT_FORMAT("elf64-x86-64", "elf64-x86-64",
+	      "elf64-x86-64")
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profiles/CTDO-Borg

@@ -0,0 +1,164 @@
+#
+# Automatically generated by make menuconfig: don't edit
+#
+
+#
+# General Setup
+#
+MCU=atmega644
+FREQ=16000000
+
+#
+# Borg Hardware
+#
+NUM_ROWS=16
+NUM_COLS=16
+NUMPLANE=3
+BORG_HW=HW_BORG_16
+
+#
+# Borg16 port setup
+#
+HIGH_CONTRAST=y
+UART_SUPPORT=y
+UART_BAUDRATE_SETTING=19200
+COLPORT1=PORTC
+COLPORT2=PORTA
+ROWPORT=PORTD
+PIN_MCLR=4
+PIN_CLK=6
+PIN_DATA=7
+# REVERSE_COLS is not set
+# INVERT_ROWS is not set
+# INTERLACED_ROWS is not set
+# INTERLACED_COLS is not set
+
+#
+# Features
+#
+RANDOM_SUPPORT=y
+# LAP_TIME_EXTENSION is not set
+SCROLLTEXT_SUPPORT=y
+SCROLLTEXT_FONT=FONT_ARIAL8
+SCROLLTEXT_BUFFER_SIZE=128
+SCROLL_X_SPEED=20
+SCROLL_Y_SPEED=20
+SCROLLTEXT_TEXT="d/#C#</#T#u/#D#>/#O#p2# #</#www.chaostreff-dortmund.de"
+# RFM12_SUPPORT is not set
+
+#
+# Joystick Support
+#
+JOYSTICK_SUPPORT=y
+JOYSTICK_CHOICE=JOY_PARALLEL
+
+#
+# Joystick Settings
+#
+PARALLEL_JOYSTICK_SUPPORT=y
+JOYSTICK_PIN_UP=PINB
+JOYSTICK_BIT_UP=0
+JOYSTICK_PIN_DOWN=PINB
+JOYSTICK_BIT_DOWN=1
+JOYSTICK_PIN_LEFT=PINB
+JOYSTICK_BIT_LEFT=2
+JOYSTICK_PIN_RIGHT=PINB
+JOYSTICK_BIT_RIGHT=3
+JOYSTICK_PIN_FIRE=PIND
+JOYSTICK_BIT_FIRE=3
+CAN_SUPPORT=y
+# SPI_HARDWARE is not set
+SPI_PORTIDX=1
+SPI_PIN_MOSI=5
+SPI_PIN_MISO=6
+SPI_PIN_SCK=7
+SPI_PIN_SS=4
+# CAN_INTERRUPT is not set
+SPI_REG_PIN_MCP_INT=PIND
+SPI_PIN_MCP_INT=2
+MENU_SUPPORT=y
+
+#
+# Games
+#
+GAME_TETRIS_CORE=y
+GAME_TETRIS=y
+GAME_BASTET=y
+GAME_TETRIS_FP=y
+GAME_SPACE_INVADERS=y
+GAME_SNAKE=y
+# SNAKE_POV_CONTROL is not set
+SNAKE_GAME_DELAY=200
+GAME_BREAKOUT=y
+GAME_KART=y
+
+#
+# Animations
+#
+ANIMATION_SCROLLTEXT=y
+ANIMATION_SPIRAL=y
+SPIRAL_DELAY=5
+ANIMATION_JOERN1=y
+ANIMATION_SNAKE=y
+SNAKE_ANIM_DELAY=100
+SNAKE_TERMINATION_DELAY=60
+SNAKE_MAX_LENGTH=64
+SNAKE_MAX_APPLES=10
+ANIMATION_CHECKERBOARD=y
+ANIMATION_FIRE=y
+FIRE_S=30
+FIRE_N=5
+FIRE_DIV=44
+FIRE_DELAY=50
+FIRE_CYCLES=800
+ANIMATION_MATRIX=y
+MATRIX_STREAMER_NUM=30
+MATRIX_CYCLES=500
+MATRIX_DELAY=60
+ANIMATION_RANDOM_BRIGHT=y
+ANIMATION_STONEFLY=y
+ANIMATION_FLYINGDOTS=y
+ANIMATION_GAMEOFLIFE=y
+GOL_DELAY=100
+GOL_CYCLES=360
+ANIMATION_BREAKOUT=y
+# ANIMATION_MHERWEG is not set
+ANIMATION_MOIRE=y
+ANIMATION_LTN_ANT=y
+# ANIMATION_TIME is not set
+TIME_MASTER_ADDR=0x00
+TIME_UPDATE_TIMEOUT=23
+ANIMATION_BMSCROLLER=y
+# ANIMATION_LABORLOGO is not set
+ANIMATION_AMPHIBIAN=y
+# ANIMATION_LOGO_OOS is not set
+ANIMATION_FAIRYDUST=y
+
+#
+# Fixed-point math patterns
+#
+ANIMATION_PLASMA=y
+FP_PLASMA_DELAY=1
+ANIMATION_PSYCHEDELIC=y
+FP_PSYCHO_DELAY=15
+ANIMATION_BLACKHOLE=y
+ANIMATION_DNA=y
+ANIMATION_SQUARES=y
+ANIMATION_TESTS=y
+ANIMATION_OFF=y
+
+#
+# small Animations
+#
+# SMALLANIMATION_ROWWALK is not set
+SMALLANIMATION_ROWWALK_SPEED=50
+SMALLANIMATION_ROWWALK_COUNT=10
+# SMALLANIMATION_COLWALK is not set
+SMALLANIMATION_COLWALK_SPEED=50
+SMALLANIMATION_COLWALK_COUNT=10
+# SMALLANIMATION_ROWBOUNCE is not set
+SMALLANIMATION_ROWBOUNCE_SPEED=50
+SMALLANIMATION_ROWBOUNCE_COUNT=10
+# SMALLANIMATION_COLBOUNCE is not set
+SMALLANIMATION_COLBOUNCE_SPEED=50
+SMALLANIMATION_COLBOUNCE_COUNT=10

profiles/LoL-Shield_Leonardo

@@ -20,8 +20,11 @@ BORG_HW=HW_LOLSHIELD
 # lolshield setup
 #
 USER_TIMER0_FOR_WAIT=1
-BRIGHTNESS=127
+LOLSHIELD=y
+BRIGHTNESS=120
 FRAMERATE=80
+# UART_SUPPORT is not set
+UART_BAUDRATE_SETTING=19200
 
 #
 # Features
@@ -54,7 +57,10 @@ GAME_TETRIS=y
 # GAME_TETRIS_FP is not set
 # GAME_SPACE_INVADERS is not set
 GAME_SNAKE=y
+# SNAKE_POV_CONTROL is not set
+SNAKE_GAME_DELAY=200
 GAME_BREAKOUT=y
+# GAME_KART is not set
 
 #
 # Animations
@@ -64,7 +70,6 @@ ANIMATION_SPIRAL=y
 SPIRAL_DELAY=5
 ANIMATION_JOERN1=y
 ANIMATION_SNAKE=y
-SNAKE_GAME_DELAY=200
 SNAKE_ANIM_DELAY=100
 SNAKE_TERMINATION_DELAY=60
 SNAKE_MAX_LENGTH=64
@@ -107,6 +112,7 @@ FP_PLASMA_DELAY=10
 ANIMATION_PSYCHEDELIC=y
 FP_PSYCHO_DELAY=25
 # ANIMATION_BLACKHOLE is not set
+# ANIMATION_DNA is not set
 ANIMATION_SQUARES=y
 # ANIMATION_TESTS is not set
 # ANIMATION_OFF is not set

profiles/LoL-Shield_Mega1280

@@ -20,8 +20,11 @@ BORG_HW=HW_LOLSHIELD
 # lolshield setup
 #
 USER_TIMER0_FOR_WAIT=1
-BRIGHTNESS=127
+LOLSHIELD=y
+BRIGHTNESS=120
 FRAMERATE=80
+# UART_SUPPORT is not set
+UART_BAUDRATE_SETTING=19200
 
 #
 # Features
@@ -54,7 +57,10 @@ GAME_BASTET=y
 # GAME_TETRIS_FP is not set
 GAME_SPACE_INVADERS=y
 GAME_SNAKE=y
+# SNAKE_POV_CONTROL is not set
+SNAKE_GAME_DELAY=200
 GAME_BREAKOUT=y
+# GAME_KART is not set
 
 #
 # Animations
@@ -64,7 +70,6 @@ ANIMATION_SPIRAL=y
 SPIRAL_DELAY=5
 ANIMATION_JOERN1=y
 ANIMATION_SNAKE=y
-SNAKE_GAME_DELAY=200
 SNAKE_ANIM_DELAY=100
 SNAKE_TERMINATION_DELAY=60
 SNAKE_MAX_LENGTH=64
@@ -107,6 +112,7 @@ FP_PLASMA_DELAY=10
 ANIMATION_PSYCHEDELIC=y
 FP_PSYCHO_DELAY=25
 ANIMATION_BLACKHOLE=y
+# ANIMATION_DNA is not set
 ANIMATION_SQUARES=y
 ANIMATION_TESTS=y
 ANIMATION_OFF=y

profiles/LoL-Shield_Mega2560

@@ -20,8 +20,11 @@ BORG_HW=HW_LOLSHIELD
 # lolshield setup
 #
 USER_TIMER0_FOR_WAIT=1
-BRIGHTNESS=127
+LOLSHIELD=y
+BRIGHTNESS=120
 FRAMERATE=80
+# UART_SUPPORT is not set
+UART_BAUDRATE_SETTING=19200
 
 #
 # Features
@@ -54,7 +57,10 @@ GAME_BASTET=y
 # GAME_TETRIS_FP is not set
 GAME_SPACE_INVADERS=y
 GAME_SNAKE=y
+# SNAKE_POV_CONTROL is not set
+SNAKE_GAME_DELAY=200
 GAME_BREAKOUT=y
+# GAME_KART is not set
 
 #
 # Animations
@@ -64,7 +70,6 @@ ANIMATION_SPIRAL=y
 SPIRAL_DELAY=5
 ANIMATION_JOERN1=y
 ANIMATION_SNAKE=y
-SNAKE_GAME_DELAY=200
 SNAKE_ANIM_DELAY=100
 SNAKE_TERMINATION_DELAY=60
 SNAKE_MAX_LENGTH=64
@@ -107,6 +112,7 @@ FP_PLASMA_DELAY=10
 ANIMATION_PSYCHEDELIC=y
 FP_PSYCHO_DELAY=25
 ANIMATION_BLACKHOLE=y
+# ANIMATION_DNA is not set
 ANIMATION_SQUARES=y
 ANIMATION_TESTS=y
 ANIMATION_OFF=y

profiles/LoL-Shield_Uno-Duemilanove-Diavolino

@@ -20,8 +20,11 @@ BORG_HW=HW_LOLSHIELD
 # lolshield setup
 #
 USER_TIMER0_FOR_WAIT=1
-BRIGHTNESS=127
+LOLSHIELD=y
+BRIGHTNESS=120
 FRAMERATE=80
+# UART_SUPPORT is not set
+UART_BAUDRATE_SETTING=19200
 
 #
 # Features
@@ -54,7 +57,10 @@ GAME_TETRIS=y
 # GAME_TETRIS_FP is not set
 # GAME_SPACE_INVADERS is not set
 GAME_SNAKE=y
+# SNAKE_POV_CONTROL is not set
+SNAKE_GAME_DELAY=200
 GAME_BREAKOUT=y
+# GAME_KART is not set
 
 #
 # Animations
@@ -64,7 +70,6 @@ ANIMATION_SPIRAL=y
 SPIRAL_DELAY=5
 ANIMATION_JOERN1=y
 ANIMATION_SNAKE=y
-SNAKE_GAME_DELAY=200
 SNAKE_ANIM_DELAY=100
 SNAKE_TERMINATION_DELAY=60
 SNAKE_MAX_LENGTH=64
@@ -107,6 +112,7 @@ FP_PLASMA_DELAY=10
 ANIMATION_PSYCHEDELIC=y
 FP_PSYCHO_DELAY=25
 ANIMATION_BLACKHOLE=y
+# ANIMATION_DNA is not set
 ANIMATION_SQUARES=y
 # ANIMATION_TESTS is not set
 # ANIMATION_OFF is not set

src/animations/Makefile

@@ -58,6 +58,11 @@ ifeq ($(ANIMATION_TIME),y)
   SRC += borg_time.c
 endif
 
+ifeq ($(ANIMATION_DNA),y)
+SRC += dna.c
+endif
+
+
 include $(MAKETOPDIR)/rules.mk
 
 include $(MAKETOPDIR)/depend.mk

src/animations/config.in

@@ -9,7 +9,6 @@ comment "Animations"
 	bool     "Joern1"        ANIMATION_JOERN1
 
 	dep_bool_menu "Snake"    ANIMATION_SNAKE         $RANDOM_SUPPORT
-		int  "Snake Game Round Delay"   SNAKE_GAME_DELAY        200
 		int  "Snake Anim Round Delay"   SNAKE_ANIM_DELAY        100
 		int  "Snake Termination Delay"  SNAKE_TERMINATION_DELAY  60
 		uint "Snake Max Length"         SNAKE_MAX_LENGTH         64
@@ -64,6 +63,8 @@ comment "Animations"
 
 	bool     "Black Hole"       ANIMATION_BLACKHOLE
 	
+	bool     "DNA"       ANIMATION_DNA	$RANDOM_SUPPORT
+
 	dep_bool "Squares"          ANIMATION_SQUARES       $RANDOM_SUPPORT
 
 	comment  "Special Animations"

src/animations/dna.c

@@ -0,0 +1,114 @@
+#include "../config.h"
+#include <stdint.h>
+#include "../random/prng.h"
+#include "../pixel.h"
+#include "../util.h"
+
+
+#define HEIGHT 12
+#define LINE_DISTANCE 4
+#define SIN_LENGTH 18
+#define SIN_MAX 6
+
+// uint8_t sin[SIN_LENGTH] = {0, 1, 2, 2, 3, 3, 4, 4, 4, 3, 3, 3, 2, 2, 1, 0};
+
+uint8_t sintab[SIN_LENGTH] = {
+		0,
+		1,
+		2,
+		3,
+		4,
+		5,
+		5,
+		6,
+		6,
+		6,
+		6,
+		6,
+		5,
+		5,
+		4,
+		3,
+		2,
+		1,
+		};
+
+
+/**
+ * Shifts the Pixmap one px right
+ */
+static void move(){
+		unsigned char plane, row, byte;
+
+		for(plane=0; plane<NUMPLANE; plane++){
+			for(row=NUM_ROWS; row--;){
+				for(byte=0; byte < LINEBYTES; byte++){
+					pixmap[plane][row][byte] = pixmap[plane][row][byte] >> 1;
+					if(byte < LINEBYTES-1){
+						pixmap[plane][row][byte] =
+								pixmap[plane][row][byte] |
+								(pixmap[plane][row][byte+1] & 0x01) << 7;
+					}
+				}
+			}
+		}
+}
+
+void dna(){
+	uint8_t mid = NUM_COLS / 2;
+	uint8_t draw_line = 0;
+
+	uint8_t top = 0;
+	uint8_t bottom = 0;
+
+	uint8_t top_color = 3;
+	uint8_t bottom_color = 2;
+
+	uint32_t c = 600;
+
+	uint8_t sinpos = 0;
+
+	int8_t direction = 1;
+
+	clear_screen(0);
+
+	while(c--){
+		top = mid - sintab[sinpos];
+		bottom = mid + sintab[sinpos];
+
+		setpixel((pixel){NUM_COLS-1,top}, top_color);
+		setpixel((pixel){NUM_COLS-1,bottom}, bottom_color);
+
+		if(draw_line == 0){
+			for(uint8_t linex = top+1; linex < bottom; linex++){
+				setpixel((pixel){NUM_COLS-1, linex}, 1);
+			}
+			setpixel((pixel){NUM_COLS-1, mid}, 1);
+		}
+
+		if(sinpos == 0){
+			if(mid-SIN_MAX <= 0){
+				direction = 1;
+			}
+			if(mid+SIN_MAX >= NUM_ROWS-1){
+				direction = -1;
+			}
+			mid = mid + (random8() > 200) * direction;
+		}
+
+		draw_line = (draw_line+1) % LINE_DISTANCE;
+		sinpos = (sinpos + 1) % SIN_LENGTH;
+
+		if(sinpos == 0){
+			uint8_t tmp_color = top_color;
+			top_color = bottom_color;
+			bottom_color = tmp_color;
+		}
+
+		wait(50);
+		move();
+	}
+
+
+}
+

src/animations/dna.h

@@ -0,0 +1,13 @@
+/*
+ * dna.h
+ *
+ *  Created on: 15.07.2014
+ *      Author: stefan
+ */
+
+#ifndef DNA_H_
+#define DNA_H_
+
+void dna();
+
+#endif /* DNA_H_ */

src/animations/fpmath_patterns.c

@@ -20,18 +20,20 @@
 
 #ifdef DOXYGEN
 	/**
-	 * Low precision means that we use Q10.5 values and 16 bit types for almost
-	 * every calculation (with multiplication and division as notable exceptions
-	 * as they and their interim results utilize 32 bit).
+	 * Low precision means that we use Q9.6 values and 16 bit types for almost
+	 * every calculation (with multiplication being a notable exception as its
+	 * interim results utilize 32 bit types).
 	 *
-	 * Use this precision mode with care as image quality will suffer
-	 * noticeably. It produces leaner and faster code, though. This mode should
-	 * not be used with resolutions higher than 16x16 as overflows are likely to
-	 * occur in interim calculations.
+	 * Use this precision mode with care as image quality will suffer noticeably
+	 * at higher resolutions. This mode should not be used with resolutions
+	 * higher than 16x16 as overflows are likely to occur in interim
+	 * calculations. It produces leaner and faster code, though.
 	 *
-	 * Normal precision (i.e. #undef LOW_PRECISION) conforms to Q7.8 with the
-	 * ability to store every interim result as Q23.8. Most operations like
-	 * square root, sine, cosine, multiplication etc. utilize 32 bit types.
+	 * Normal precision (i.e. #undef LOW_PRECISION) conforms to Q23.8 for actual
+	 * values and interim results. Operations like square root, sine, cosine,
+	 * multiplication etc. utilize 32 bit types. It's extremly slow on AVR, but
+	 * it's your only chance to run those animations on devices with resolutions
+	 * higher than 16x16.
 	 */
 	#define FP_LOW_PRECISION
 #endif /* DOXYGEN */
@@ -66,18 +68,18 @@
 	// lookup table as well!
 
 	/** Multiply a number by this factor to convert it to a fixed-point value.*/
-	#define FIX           32
+	#define FIX           64
 	/**	Number of fractional bits of a value (i.e. ceil(log_2(FIX))). */
-	#define FIX_FRACBITS  5
+	#define FIX_FRACBITS  6
 	/**
 	 * The number of temporal quantization steps of the sine lookup table. It
 	 * must be a divisor of (FIX * 2 * pi) and this divisor must be divisable by
 	 * 4 itself. Approximate this value as close as possible to keep rounding
 	 * errors at a minimum.
 	 */
-	#define FIX_SIN_COUNT  200
+	#define FIX_SIN_COUNT  200u
 	/** The rounded down quotient of (FIX * 2 * pi) and FIX_SIN_COUNT */
-	#define FIX_SIN_DIVIDER 1
+	#define FIX_SIN_DIVIDER 2u
 
 	/** Type of the lookup table elements. */
 	typedef uint8_t lut_t;
@@ -85,26 +87,26 @@
 	/**
 	 * Lookup table of fractional parts which model the first quarter of a
 	 * sine period. The rest of that period is calculated by mirroring those
-	 * values. These values are intended for Q5 types.
+	 * values. These values are intended for Q6 types.
 	 */
 	static lut_t const fix_sine_lut[FIX_SIN_COUNT / 4] =
-		{  0,   1,   2,   3,   4,   5,   6,   7,
-		   8,   9,  10,  11,  12,  13,  14,  14,
-		  15,  16,  17,  18,  19,  20,  20,  21,
-		  22,  23,  23,  24,  25,  25,  26,  26,
-		  27,  27,  28,  28,  29,  29,  30,  30,
-		  30,  31,  31,  31,  31,  32,  32,  32,
-		  32,  32};
+		{  0,   2,   4,   6,   8,  10,  12,  14,
+		  16,  18,  20,  22,  24,  25,  27,  29,
+		  31,  33,  34,  36,  38,  39,  41,  42,
+		  44,  45,  47,  48,  49,  51,  52,  53,
+		  54,  55,  56,  57,  58,  59,  60,  60,
+		  61,  61,  62,  62,  63,  63,  63,  64,
+		  64,  64};
 
 #else
 	/** This is the type we expect ordinary integers to be. */
 	typedef int16_t  ordinary_int_t;
 	/** This is the type which we use for fixed-point values. */
-	typedef int16_t  fixp_t;
+	typedef int32_t  fixp_t;
 	/** This type covers arguments of fixSin() and fixCos(). */
 	typedef int32_t  fixp_trig_t;
 	/** This type covers interim results of fixed-point operations. */
-	typedef int32_t  fixp_interim_t;
+	typedef uint32_t  fixp_interim_t;
 	/** This type covers interim results of the fixSqrt() function. */
 	typedef uint32_t ufixp_interim_t;
 	/** Number of bits the fixSqrt() function can handle. */
@@ -123,12 +125,12 @@
 	 * 4 itself. Approximate this value as close as possible to keep rounding
 	 * errors at a minimum.
 	 */
-	#define FIX_SIN_COUNT  200
+	#define FIX_SIN_COUNT  200u
 	/** The rounded down quotient of (FIX * 2 * pi) and FIX_SIN_COUNT */
-	#define FIX_SIN_DIVIDER 8
+	#define FIX_SIN_DIVIDER 8u
 
 	/** Type of the lookup table elements. */
-	typedef uint8_t lut_t;
+	typedef int16_t lut_t;
 
 	/**
 	 * Lookup table of fractional parts which model the first quarter of a
@@ -142,7 +144,7 @@
 			 175, 181, 186, 192, 197, 202, 207, 211,
 			 216, 220, 224, 228, 231, 235, 238, 240,
 			 243, 245, 247, 249, 251, 252, 253, 254,
-			 255, 255};
+			 255, 256};
 
 #endif
 
@@ -252,14 +254,14 @@ static fixp_t fixSin(fixp_trig_t fAngle)
 
 /**
  * Fixed-point variant of the cosine function which takes a fixed-point angle
- * (radian). It adds FIX_PI_2 to the given angle and consults the fixSin()
- * function for the final result.
+ * (radian). It substracts FIX_PI_2 from the given angle and consults the
+ * fixSin() function for the final result.
  * @param fAngle A fixed-point value in radian.
  * @return Result of the cosine function normalized to a range from -FIX to FIX.
  */
-static fixp_t fixCos(fixp_trig_t const fAngle)
+static inline fixp_t fixCos(fixp_trig_t const fAngle)
 {
-	return fixSin(fAngle + FIX_PI_2);
+	return fixSin(fAngle - FIX_PI_2);
 }
 
 
@@ -275,7 +277,7 @@ static fixp_t fixSqrt(ufixp_interim_t const a)
 	nRoot = 0;  // clear root
 	nRemainingHigh = 0; // clear high part of partial remainder
 	nRemainingLow = a; // get argument into low part of partial remainder
-	nCount = (SQRT_BITS / 2 - 1) + (FIX_FRACBITS >> 1); // load loop counter
+	nCount = ((SQRT_BITS - 1) + FIX_FRACBITS) / 2; // load loop counter
 	do
 	{
 		nRemainingHigh =
@@ -451,16 +453,16 @@ static unsigned char fixAnimPlasma(unsigned char const x,
 	assert(x < (LINEBYTES * 8));
 	assert(y < NUM_ROWS);
 
-	// scaling factor
-	static fixp_t const fPlasmaX = (2 * PI * FIX) / NUM_COLS;
-
 	// reentrant data
 	fixp_plasma_t *const p = (fixp_plasma_t *)r;
 
+	// scaling factor
+	static fixp_t const fPlasmaX = FIX / 3.7;
+
 	if (x == 0 && y == 0)
 	{
-		p->fFunc2CosArg = NUM_ROWS * fixCos(t) + fixScaleUp(NUM_ROWS);
-		p->fFunc2SinArg = NUM_COLS * fixSin(t) + fixScaleUp(NUM_COLS);
+		p->fFunc2CosArg = NUM_COLS * (fixCos(t) + FIX);
+		p->fFunc2SinArg = NUM_ROWS * (fixSin(t) + FIX);
 		for (unsigned char i = LINEBYTES * 8u; i--;)
 		{
 			p->fFunc1[i] = fixSin(fixMul(fixScaleUp(i), fPlasmaX) + t);
@@ -470,8 +472,8 @@ static unsigned char fixAnimPlasma(unsigned char const x,
 	fixp_t const fFunc2 = fixSin(fixMul(fixDist(fixScaleUp(x), fixScaleUp(y),
 			p->fFunc2SinArg, p->fFunc2CosArg), fPlasmaX));
 
-	unsigned char const nRes = (unsigned char)(fixMul(p->fFunc1[x] + fFunc2 +
-			fixScaleUp(2), ((NUMPLANE + 1) / 4.0 - 0.05) * FIX)) / FIX;
+	unsigned char const nRes = (fixMul(p->fFunc1[x] + fFunc2 +
+			2 * FIX, ((NUMPLANE + 1) / 4.0 - 0.05) * FIX)) / FIX;
 	assert (nRes <= NUMPLANE);
 
 	return nRes;
@@ -484,12 +486,12 @@ void plasma(void)
 {
 	fixp_plasma_t r;
 #ifndef __AVR__
-	fixDrawPattern(0, fixScaleUp(75), 0.1 * FIX, 15, fixAnimPlasma, &r);
+	fixDrawPattern(0, fixScaleUp(75), 0.05 * FIX, 15, fixAnimPlasma, &r);
 #else
 	#ifndef FP_PLASMA_DELAY
 		#define FP_PLASMA_DELAY 1
 	#endif
-	fixDrawPattern(0, fixScaleUp(60), 0.1 * FIX,
+	fixDrawPattern(0, fixScaleUp(60), 0.05 * FIX,
 			FP_PLASMA_DELAY, fixAnimPlasma, &r);
 #endif /* __AVR__ */
 }
@@ -505,9 +507,9 @@ void plasma(void)
  */
 typedef struct fixp_psychedelic_s
 {
-	fixp_t fCos;         /**< One of the column factors of the curl. */
-	fixp_t fSin;         /**< One of the row factors of the curl. */
-	fixp_interim_t ft10; /**< A value involved in rotating the curl's center. */
+	fixp_t fCos;        /**< X-coordinate of the curl's center. */
+	fixp_t fSin;        /**< Y-coordinate of the curl's center. */
+	fixp_t fPhaseShift; /**< Phase-shift for the flow effect. */
 } fixp_psychedelic_t;
 
 
@@ -530,15 +532,15 @@ static unsigned char fixAnimPsychedelic(unsigned char const x,
 
 	if (x == 0 && y == 0)
 	{
-		p->fCos = NUM_COLS/2 * fixCos(t);
-		p->fSin = NUM_ROWS/2 * fixSin(t);
-		p->ft10 = fixMul(t, fixScaleUp(10));
+		p->fCos = (fixp_t)(NUM_COLS * 0.72) * (fixCos(t) + FIX);
+		p->fSin = (fixp_t)(NUM_ROWS * 0.72) * (fixSin(t) + FIX);
+		p->fPhaseShift = t * 8;
 	}
 
 	unsigned char const nResult =
-			(unsigned char)(fixMul(fixSin(fixDist(fixScaleUp(x), fixScaleUp(y),
-			p->fCos, p->fSin) - p->ft10) + fixScaleUp(1),
-			(fixp_t)((NUMPLANE - 1.05) * FIX))) / FIX;
+		fixMul(fixSin(fixDist(fixScaleUp(x), fixScaleUp(y),
+		p->fSin, p->fCos) - p->fPhaseShift) + FIX,
+		(fixp_t)((NUMPLANE - 1.05) * FIX)) / FIX;
 	assert(nResult <= NUMPLANE);
 
 	return nResult;

src/animations/program.c

@@ -1,4 +1,5 @@
 
+#include <stdbool.h>
 #include "../config.h"
 #include "../compat/pgmspace.h"
 #include "../random/prng.h"
@@ -9,33 +10,37 @@
 
 
 #ifdef ANIMATION_TESTS
-void test_level(unsigned char level){
+void test_level(unsigned char level, bool debug){
 	for (unsigned char y=NUM_ROWS;y--;){
 		for (unsigned char x=NUM_COLS;x--;){
 			setpixel((pixel){x,y}, level);
 			wait(5);
 		}
 	}
+	if (!debug) {
 		wait(2000);
 	}
+}
 
-void test_palette(){
+void test_palette(bool debug){
 	for (unsigned char y=NUM_ROWS;y--;){
 		for (unsigned char x=NUM_COLS;x--;){
 			setpixel((pixel){x,y}, y%4);
 			// wait(1);
 		}
 	}
+	if (!debug) {
 		wait(2000);
 	}
+}
 
-void test_palette2(){
+void test_palette2(bool debug){
 	for (unsigned char x=NUM_COLS;x--;){
 		for (unsigned char y=NUM_ROWS;y--;){
 			setpixel((pixel){x,y}, x%4);
-			// wait(1);
 		}
 	}
+	if (!debug) {
 		wait(1000);
 		for (unsigned char x=NUM_COLS;x--;){
 			// shift image right
@@ -43,6 +48,7 @@ void test_palette2(){
 			wait(30);
 		}
 	}
+}
 #endif
 
 

src/animations/program.h

@@ -1,13 +1,14 @@
 #ifndef PROGRAMM_H_
 #define PROGRAMM_H_
 
+#include <stdbool.h>
 #include "../pixel.h"
 #include "../util.h"
 
 
-void test_level(unsigned char level);
-void test_palette();
-void test_palette2();
+void test_level(unsigned char level, bool debug);
+void test_palette(bool debug);
+void test_palette2(bool debug);
 
 #ifdef ANIMATION_OFF
 inline static void off()

src/borg_hw/borg_hw_borg16.c

@@ -33,15 +33,34 @@
 #define COLDDR2  DDR(COLPORT2)
 #define ROWDDR   DDR(ROWPORT)
 
-#if defined (__AVR_ATmega644P__) || defined (__AVR_ATmega644__) || (__AVR_ATmega1284P__) || defined (__AVR_ATmega1284__)
-/* more ifdef magic :-( */
-#define OCR0 OCR0A
-#define TIMER0_COMP_vect TIMER0_COMPA_vect
+#if defined(__AVR_ATmega164__)   || \
+    defined(__AVR_ATmega164P__)  || \
+    defined(__AVR_ATmega324__)   || \
+    defined(__AVR_ATmega324P__)  || \
+    defined(__AVR_ATmega644__)   || \
+    defined(__AVR_ATmega644P__)  || \
+    defined(__AVR_ATmega1284__)  || \
+    defined(__AVR_ATmega1284P__)
+#	define TIMER0_OFF()        TCCR0A = 0; TCCR0B = 0
+#	define TIMER0_CTC_CS256()  TCCR0A = _BV(WGM01); TCCR0B = _BV(CS02)
+#	define TIMER0_RESET()      TCNT0  = 0
+#	define TIMER0_COMPARE(t)   OCR0A  = t
+#	define TIMER0_INT_ENABLE() TIMSK0 = _BV(OCIE0A)
+#	define TIMER0_ISR          TIMER0_COMPA_vect
+#else // ATmega16/32
+#	define TIMER0_OFF()        TCCR0 = 0
+#	define TIMER0_CTC_CS256()  TCCR0 = _BV(WGM01) | _BV(CS02)
+#	define TIMER0_RESET()      TCNT0 = 0
+#	define TIMER0_COMPARE(t)   OCR0  = t
+#	define TIMER0_INT_ENABLE() TIMSK = _BV(OCIE0)
+#	define TIMER0_ISR          TIMER0_COMP_vect
 #endif
 
+
 // buffer which holds the currently shown frame
 unsigned char pixmap[NUMPLANE][NUM_ROWS][LINEBYTES];
 
+
 // switch to next row
 static void nextrow(uint8_t row) {
 	//reset states of preceding row
@@ -80,12 +99,18 @@ static void nextrow(uint8_t row) {
 	}
 }
 
+
 // show a row
 static void rowshow(unsigned char row, unsigned char plane) {
 	// depending on the currently drawn plane, display the row for a specific
 	// amount of time
+#ifdef HIGH_CONTRAST
+	static unsigned char const ocr_table[] = {2, 5, 22};
+#else
 	static unsigned char const ocr_table[] = {3, 4, 22};
-	OCR0 = ocr_table[plane];
+#endif
+
+	TIMER0_COMPARE(ocr_table[plane]);
 
 	// output data of the current row to the column drivers
 	uint8_t tmp, tmp1;
@@ -124,19 +149,19 @@ static void rowshow(unsigned char row, unsigned char plane) {
 
 }
 
-// depending on the plane this interrupt triggers at 50 kHz, 31.25 kHz or
-// 12.5 kHz
-ISR(TIMER0_COMP_vect) {
+
+// interrupt handler
+ISR(TIMER0_ISR) {
 	static unsigned char plane = 0;
 	static unsigned char row = 0;
 
-	// reset watchdog
-	wdt_reset();
-
 	// increment both row and plane
 	if (++plane == NUMPLANE) {
 		plane = 0;
 		if (++row == NUM_ROWS) {
+			// reset watchdog
+			wdt_reset();
+
 			row = 0;
 		}
 		nextrow(row);
@@ -146,49 +171,27 @@ ISR(TIMER0_COMP_vect) {
 	rowshow(row, plane);
 }
 
+
+// disables timer, causing the watchdog to reset the MCU
 void timer0_off() {
 	cli();
-
 	COLPORT1 = 0;
 	COLPORT2 = 0;
 	ROWPORT = 0;
-
-#if defined (__AVR_ATmega644P__) || defined (__AVR_ATmega644__) || (__AVR_ATmega1284P__) || defined (__AVR_ATmega1284__)
-	TCCR0A = 0x00;
-	TCCR0B = 0x00;
-#else
-
-	TCCR0 = 0x00;
-#endif
+	TIMER0_OFF();
 	sei();
 }
 
+
 // initialize timer which triggers the interrupt
 static void timer0_on() {
-	/* 	TCCR0: FOC0 WGM00 COM01 COM00 WGM01 CS02 CS01 CS00
-	 CS02 CS01 CS00
-	 0    0    0       stop
-	 0    0    1       clk
-	 0    1    0       clk/8
-	 0    1    1       clk/64
-	 1    0    0       clk/256
-	 1    0    1       clk/1024
-	 */
-
-#if defined (__AVR_ATmega644P__) || defined (__AVR_ATmega644__) || (__AVR_ATmega1284P__) || defined (__AVR_ATmega1284__)
-	TCCR0A = 0x02; // CTC Mode
-	TCCR0B = 0x04; // clk/256
-	TCNT0  = 0;    // reset timer
-	OCR0   = 20;   // compare with this value
-	TIMSK0 = 0x02; // compare match Interrupt on
-#else
-	TCCR0  = 0x0C; // CTC Mode, clk/256
-	TCNT0  = 0;    // reset timer
-	OCR0   = 20;   // compare with this value
-	TIMSK  = 0x02; // compare match Interrupt on
-#endif
+	TIMER0_CTC_CS256();  // CTC mode, prescaling conforms to clk/256
+	TIMER0_RESET();      // set counter to 0
+	TIMER0_COMPARE(20);  // compare with this value first
+	TIMER0_INT_ENABLE(); // enable Timer/Counter0 Output Compare Match (A) Int.
 }
 
+
 void borg_hw_init() {
 	// switch column ports to output mode
 	COLDDR1 = 0xFF;
@@ -208,5 +211,5 @@ void borg_hw_init() {
 
 	// activate watchdog timer
 	wdt_reset();
-	wdt_enable(0x00); // 17ms watchdog
+	wdt_enable(WDTO_15MS); // 15ms watchdog
 }

src/borg_hw/borg_hw_lolshield.c

@@ -973,3 +973,27 @@ void borg_hw_init() {
 	wdt_reset();
 	wdt_enable(WDTO_15MS); // 15ms watchdog
 }
+
+void timer0_off() {
+	cli();
+#if defined (__AVR_ATmega48__)   || \
+    defined (__AVR_ATmega48P__)  || \
+    defined (__AVR_ATmega88__)   || \
+    defined (__AVR_ATmega88P__)  || \
+    defined (__AVR_ATmega168__)  || \
+    defined (__AVR_ATmega168P__) || \
+    defined (__AVR_ATmega328__)  || \
+    defined (__AVR_ATmega328P__) || \
+    defined (__AVR_ATmega1280__) || \
+    defined (__AVR_ATmega2560__)
+	TCCR2A = 0x00;
+	TCCR2B = 0x00;
+#elif defined (__AVR_ATmega8__) || \
+      defined (__AVR_ATmega128__)
+	TCCR2 = 0x00;
+#elif defined (__AVR_ATmega32U4__)
+	TCCR1A = 0x00;
+	TCCR1B = 0x00;
+#endif
+	sei();
+}

src/borg_hw/config_borg16.in

@@ -17,6 +17,21 @@ comment "Borg16 port setup"
 #//das dier sind die individuellen Dateneingänge für die Schieberegister
 #define PIN_SHFT1 PD7
 
+bool "Higher Contrast" HIGH_CONTRAST n
+
+bool "UART Support" UART_SUPPORT n
+choice 'Baud Rate'			\
+   "2400 2400 \
+    4800 4800 \
+    9600 9600 \
+    14400 14400 \
+    19200 19200 \
+    28800 28800 \
+    38400 38400 \
+    57600 57600 \
+    76800 76800 \
+    115200 115200" \
+   '19200' UART_BAUDRATE_SETTING
 
 choice 'Column Port 1 (right)'			\
    "PORTA  PORTA \

src/borg_hw/config_lolshield.in

@@ -2,8 +2,23 @@ mainmenu_option next_comment
 comment "lolshield setup"
 
 define_int USER_TIMER0_FOR_WAIT 1
+define_bool LOLSHIELD y
 
-uint "Brightness (0-127)"     BRIGHTNESS 127
+uint "Brightness (0-127)"     BRIGHTNESS 120
 uint "Framerate (default 80)" FRAMERATE   80
 
+bool "UART Support" UART_SUPPORT n
+choice 'Baud Rate'			\
+   "2400 2400 \
+    4800 4800 \
+    9600 9600 \
+    14400 14400 \
+    19200 19200 \
+    28800 28800 \
+    38400 38400 \
+    57600 57600 \
+    76800 76800 \
+    115200 115200" \
+   '19200' UART_BAUDRATE_SETTING
+
 endmenu

src/config.h

@@ -33,6 +33,8 @@
 
 #define INIT_EEPROM
 
-//#define UART_BAUD_RATE 115200L
+#if defined(UART_SUPPORT) && defined(LOLSHIELD) && defined(__AVR_ATmega32U4__)
+#	error UART not supported on Arduino Leonardo
+#endif
 
 #endif /* CONFIG_H_ */

src/display_loop.c

@@ -1,5 +1,6 @@
 
 #include <setjmp.h>
+#include <stdbool.h>
 #include <stdio.h>
 
 #include "config.h"
@@ -7,6 +8,7 @@
 #include "animations/snake.h"
 #include "animations/program.h"
 #include "animations/matrix.h"
+#include "animations/dna.h"
 #include "animations/gameoflife.h"
 #include "animations/stonefly.h"
 #include "animations/flyingdots.h"
@@ -48,7 +50,7 @@
 #  include "joystick/joystick.h"
 #endif
 
-volatile unsigned char oldMode, oldOldmode, mode;
+volatile unsigned char oldMode, oldOldmode, reverseMode, mode;
 
 jmp_buf newmode_jmpbuf;
 
@@ -65,6 +67,12 @@ void display_loop(){
 //	mcuf_serial_mode();
 
 	mode = setjmp(newmode_jmpbuf);
+
+#ifdef JOYSTICK_SUPPORT
+	// in case we get here via mode jump, we (re)enable joystick queries
+	waitForFire = 1;
+#endif
+
 	oldOldmode = oldMode;
 
 #ifdef JOYSTICK_SUPPORT
@@ -76,6 +84,7 @@ void display_loop(){
 		clear_screen(0);
 #endif
 		oldMode = mode;
+
 		switch(mode++) {
 
 #ifdef ANIMATION_SCROLLTEXT
@@ -85,7 +94,8 @@ void display_loop(){
 	#ifdef RANDOM_SUPPORT
 			{
 				char a[28];
-				sprintf(a,"</# counter == %lu  ", (unsigned long) percnt_get());
+				sprintf(a,"</# counter == %lu  ",
+					(unsigned long)percnt_get(&g_reset_counter, &g_reset_counter_idx));
 				scrolltext(a);
 			}
 	#endif
@@ -250,22 +260,28 @@ void display_loop(){
 			break;
 #endif
 
+#ifdef ANIMATION_DNA
+		case 26:
+			dna();
+			break;
+#endif
+
 #ifdef ANIMATION_TESTS
 		case 31:
-			test_level(1);
+			test_level(1, false);
 			break;
 
 		case 32:
-			test_level(2);
+			test_level(2, false);
 			break;
 
 		case 33:
-			test_level(3);
+			test_level(3, false);
 			break;
 
 		case 35:
-			test_palette();
-			test_palette2();
+			test_palette(false);
+			test_palette2(false);
 			break;
 #endif
 
@@ -292,26 +308,26 @@ void display_loop(){
 #endif
 
 #ifdef MENU_SUPPORT
-		case 42:
+		case 0xFDu:
 			mode = 1;
 			break;
 
-		case 43:
+		case 0xFEu:
 			menu();
 			mode = oldOldmode;
 			break;
 #else
 
-		case 42:
+		case 0xFDu:
 #ifdef JOYSTICK_SUPPORT
 			if (JOYISFIRE)
-				mode = 43;
+				mode = 0xFEu;
 			else
 #endif
 				mode = 1;
 			break;
 
-		case 43:
+		case 0xFEu:
 #ifdef JOYSTICK_SUPPORT
 			waitForFire = 0;   // avoid circular jumps
 			while (JOYISFIRE); // wait until user released the fire button
@@ -354,10 +370,19 @@ void display_loop(){
 #endif
 
 #ifdef ANIMATION_OFF
-		case 0xFF:
+		case 0xFFu:
 			off();
 			break;
 #endif
+		default:
+			if (reverseMode) {
+				if (reverseMode-- == (mode - 1)) {
+					mode -= 2;
+				} else {
+					reverseMode = 0;
+				}
+			}
+			break;
 		}
 	}
 }

src/games/config.in

@@ -7,7 +7,13 @@ comment "Games"
 	endmenu
 	
 	dep_bool "Space Invaders" GAME_SPACE_INVADERS $JOYSTICK_SUPPORT $RANDOM_SUPPORT
-	dep_bool "Snake"          GAME_SNAKE          $JOYSTICK_SUPPORT $RANDOM_SUPPORT
+
+	dep_bool_menu "Snake"  GAME_SNAKE y $JOYSTICK_SUPPORT $RANDOM_SUPPORT
+		bool "POV Controls"           SNAKE_POV_CONTROL n
+		int  "Snake Game Round Delay" SNAKE_GAME_DELAY  200
+	endmenu
+
 	dep_bool "Breakout"       GAME_BREAKOUT       $JOYSTICK_SUPPORT $RANDOM_SUPPORT
+
 	dep_bool "Kart"       	  GAME_KART           $JOYSTICK_SUPPORT $RANDOM_SUPPORT
 endmenu

src/games/kart/kart.c

@@ -224,7 +224,7 @@ void kart_game(){
 		wait(WAIT);
 	}
 
-	snprintf(game_over, sizeof(game_over), "</#Game Over, Score: %i",  cycle);
+	snprintf(game_over, sizeof(game_over), "</#Game Over, Score: %lu",  cycle);
 	scrolltext(game_over);
 }
 

src/games/snake/snake_game.c

@@ -12,6 +12,7 @@
 
 #include <assert.h>
 #include <stdint.h>
+#include <stdbool.h>
 #include "../../config.h"
 #include "../../compat/pgmspace.h"
 #include "../../pixel.h"
@@ -36,11 +37,13 @@ game_descriptor_t snake_game_descriptor __attribute__((section(".game_descriptor
 #endif
 
 
+#ifdef DOXYGEN
 	/**
- * If defined, joystick controls are NOT as "seen" by the snake but absolute,
- * that is, if pressing up, snake goes up, etc.
+	 * If defined, joystick controls are bound to the point of view of the
+	 * snake, i.e. only the left an right joystick direction can be used.
 	 */
-#define SNAKE_NEWCONTROL
+	#define SNAKE_POV_CONTROL
+#endif
 
 #if !defined USNAKE_MAX_LENGTH || defined DOXYGEN
 	/** The maximum length of the snake. */
@@ -102,6 +105,8 @@ typedef struct snake_protagonist_s
 	uint8_t nHeadIndex;                 /**< Index of the head segment. */
 	uint8_t nTailIndex;                 /**< Index of the tail segment. */
 	snake_dir_t dir;                    /**< Direction of the snake.    */
+	bool bJoystickLocked;               /**< Avoid double joytick queries
+	                                         between movements. */
 } snake_protagonist_t;
 
 
@@ -213,6 +218,7 @@ static void snake_initGameProtagonist(snake_protagonist_t *pprotSnake)
 #endif
 	pprotSnake->nTailIndex = 0;
 	pprotSnake->nHeadIndex = 1;
+	pprotSnake->bJoystickLocked = false;
 }
 
 #ifdef GAME_SNAKE
@@ -225,17 +231,10 @@ static void snake_userControl(snake_protagonist_t *pprotSnake,
                               snake_dir_t *pdirLast)
 {
 	snake_dir_t dirJoystick = snake_queryJoystick();
-#ifdef SNAKE_NEWCONTROL
-	if (dirJoystick != SNAKE_DIR_NONE)
-	{
-		// valid transitions can only be uneven
-		if ((pprotSnake->dir + dirJoystick) & 0x01)
-		{
-			pprotSnake->dir = dirJoystick;
-		}
-	}
-#else
-	if ((dirJoystick ^ *pdirLast) && (dirJoystick != SNAKE_DIR_NONE))
+#	ifdef SNAKE_POV_CONTROL
+
+	if ((dirJoystick ^ *pdirLast) && (dirJoystick != SNAKE_DIR_NONE) &&
+			(!pprotSnake->bJoystickLocked))
 	{
 		// only left or right movements are valid
 		if (dirJoystick & 0x01)
@@ -244,8 +243,24 @@ static void snake_userControl(snake_protagonist_t *pprotSnake,
 			pprotSnake->dir = (pprotSnake->dir +
 					(dirJoystick == SNAKE_DIR_LEFT ? 3 : 1)) % 4u;
 		}
+		// we query the joystick twice as fast as we move the snake, so we
+		// have to ensure that it does not bite its head with its head...uh
+		pprotSnake->bJoystickLocked = true;
 	}
 	*pdirLast = dirJoystick;
+#	else
+	if (dirJoystick != SNAKE_DIR_NONE)
+	{
+		// valid transitions can only be uneven
+		if (((pprotSnake->dir + dirJoystick) & 0x01) &&
+				!pprotSnake->bJoystickLocked)
+		{
+			pprotSnake->dir = dirJoystick;
+		}
+		// we query the joystick twice as fast as we move the snake, so we
+		// have to ensure that it does not bite its head with its head...uh
+		pprotSnake->bJoystickLocked = true;
+	}
 #	endif
 }
 #endif
@@ -362,9 +377,9 @@ static void snake_initApples(snake_apples_t *pApples)
  * Checks for an apple at a given position and removes it if there is one.
  * @param pApples The set of apples which are lying on the playing field.
  * @param pxHead The position to be tested.
- * @return 0 if no apples were found, 1 otherwise
+ * @return false if no apples were found, true otherwise
  */
-static uint8_t snake_checkForApple(snake_apples_t *pApples, pixel pxHead)
+static bool snake_checkForApple(snake_apples_t *pApples, pixel pxHead)
 {
 	for (uint8_t i = pApples->nAppleCount; i--;)
 	{
@@ -376,10 +391,10 @@ static uint8_t snake_checkForApple(snake_apples_t *pApples, pixel pxHead)
 				pApples->aApples[i] = pApples->aApples[i + 1];
 			}
 			--pApples->nAppleCount;
-			return 1;
+			return true;
 		}
 	}
-	return 0;
+	return false;
 }
 
 
@@ -419,7 +434,7 @@ void snake_engine(uint8_t bDemoMode)
 	clear_screen(0);
 	snake_drawBorder();
 
-	for (uint8_t nTick = 0; 1; nTick ^= SNAKE_COLOR_APPLE)
+	for (uint8_t nTick = 0; true; nTick ^= SNAKE_COLOR_APPLE)
 	{
 		// determine new direction
 #if defined ANIMATION_SNAKE && defined GAME_SNAKE
@@ -439,6 +454,8 @@ void snake_engine(uint8_t bDemoMode)
 		snake_userControl(&protSnake, &dirLast);
 		if (nTick) {
 #endif
+			// release joystick lock
+			protSnake.bJoystickLocked = false;
 
 			// actually move head
 			pixel pxOldHead = protSnake.aSegments[protSnake.nHeadIndex];

src/games/space_invaders/invader_init.c

@@ -100,7 +100,7 @@ void initInvaders(Invaders * iv, unsigned char lv)
 			uint16_t mask = 0x0001;
 			for (x = 11; x--;)
 			{
-				iv->map[x][y] = (hansrow & mask) ? 3 : 1;
+				iv->map[x][y] = (hansrow & mask) ? 2 : 1;
 				mask <<= 1;
 			}
 		}
@@ -108,7 +108,7 @@ void initInvaders(Invaders * iv, unsigned char lv)
 		iv->pos.x = (NUM_COLS - 11) / 2;
 		iv->pos.y = SPACESHIP_LINE + 1;
 
-		iv->speed = MIN_SPEED + 2;
+		iv->speed = MIN_SPEED + 40;
 		iv->direction = 1;
 		break;
 

src/games/tetris/highscore.c

@@ -109,6 +109,7 @@ uint16_t tetris_highscore_inputName(void)
 
 uint16_t tetris_highscore_retrieveHighScore(tetris_highscore_index_t nIndex)
 {
+	eeprom_busy_wait();
 	uint16_t nHighScore =
 			eeprom_read_word(&g_highScoreTable.nHighScore[nIndex]);
 

src/games/tetris/highscore.h

@@ -78,6 +78,7 @@ void tetris_highscore_saveHighScore(tetris_highscore_index_t nIndex,
 {
 	if (nHighScore > tetris_highscore_retrieveHighScore(nIndex))
 	{
+		eeprom_busy_wait();
 		eeprom_write_word(&g_highScoreTable.nHighScore[nIndex], nHighScore);
 	}
 }
@@ -91,6 +92,7 @@ void tetris_highscore_saveHighScore(tetris_highscore_index_t nIndex,
 inline static
 uint16_t tetris_highscore_retrieveHighScoreName(tetris_highscore_index_t nIdx)
 {
+	eeprom_busy_wait();
 	uint16_t nHighScoreName =
 			eeprom_read_word(&g_highScoreTable.nHighScoreName[nIdx]);
 
@@ -107,6 +109,7 @@ inline static
 void tetris_highscore_saveHighScoreName(tetris_highscore_index_t nIndex,
                                         uint16_t nHighscoreName)
 {
+	eeprom_busy_wait();
 	eeprom_write_word(&g_highScoreTable.nHighScoreName[nIndex], nHighscoreName);
 }
 

src/games/tetris/input.c

@@ -50,11 +50,11 @@
 #define TETRIS_INPUT_REPEAT_DELAY 5
 
 /** Number of loop cyles the left button is ignored */
-#define TETRIS_INPUT_CHATTER_TICKS_LEFT    12
+#define TETRIS_INPUT_CHATTER_TICKS_LEFT    24
 /** Number of loop cyles the right button is ignored */
-#define TETRIS_INPUT_CHATTER_TICKS_RIGHT   12
+#define TETRIS_INPUT_CHATTER_TICKS_RIGHT   24
 /** Number of loop cyles the down button is ignored */
-#define TETRIS_INPUT_CHATTER_TICKS_DOWN    12
+#define TETRIS_INPUT_CHATTER_TICKS_DOWN    24
 /** Number of loop cyles the clockwise rotation button is ignored */
 #define TETRIS_INPUT_CHATTER_TICKS_ROT_CW  24
 /** Number of loop cyles the counter clockwise rotation button is ignored */

src/games/tetris/view.c

@@ -52,7 +52,8 @@
 /** color of line counter */
 #define TETRIS_VIEW_COLORCOUNTER 2
 
-#if (NUM_ROWS < 16) && (NUM_COLS > NUM_ROWS) && (!defined GAME_TETRIS_FP)
+#if (((NUM_ROWS < 16) && (NUM_COLS > NUM_ROWS)) || \
+	((NUM_ROWS == 16) && (NUM_COLS == 80))) && (!defined GAME_TETRIS_FP)
 #	define VIEWCOLS NUM_ROWS
 #	define VIEWROWS NUM_COLS
 #	define VIEW_TILT
@@ -77,7 +78,8 @@
 	#if VIEWROWS >= 16
 		#define TETRIS_VIEW_XOFFSET_COUNTER \
 				(TETRIS_VIEW_XOFFSET_DUMP + TETRIS_VIEW_WIDTH_DUMP + 1)
-		#define TETRIS_VIEW_YOFFSET_COUNT100 ((VIEWCOLS - 14) / 2)
+		#define TETRIS_VIEW_YOFFSET_COUNT100 + \
+				TETRIS_VIEW_YOFFSET_DUMP + ((TETRIS_VIEW_HEIGHT_DUMP - 14) / 2)
 		#define TETRIS_VIEW_YOFFSET_COUNT10  (TETRIS_VIEW_YOFFSET_COUNT100 + 2)
 		#define TETRIS_VIEW_YOFFSET_COUNT1   (TETRIS_VIEW_YOFFSET_COUNT10 + 4)
 

src/main.c

@@ -1,6 +1,7 @@
 
 #include <setjmp.h>
 #include <avr/interrupt.h>
+#include <avr/pgmspace.h>
 #include <stdio.h>
 
 #include "config.h"
@@ -19,6 +20,10 @@
 	#include "can/borg_can.h"
 #endif
 
+#ifdef UART_SUPPORT
+#    include "uart/uart.h"
+#endif
+
 #ifdef RFM12_SUPPORT
 	#include "rfm12/borg_rfm12.h"
 #endif
@@ -27,8 +32,8 @@ int main (void){
 	clear_screen(0);
 
 #ifdef RANDOM_SUPPORT
-	srandom32(percnt_get());
-	percnt_inc();
+	srandom32(percnt_get(&g_reset_counter, &g_reset_counter_idx));
+	percnt_inc(&g_reset_counter, &g_reset_counter_idx);
 #endif
 
 #ifdef RFM12_SUPPORT
@@ -41,12 +46,12 @@ int main (void){
 	bcan_init();
 #endif
 
-#ifdef JOYSTICK_SUPPORT
-	joy_init();	
+#ifdef UART_SUPPORT
+	uart_init(UART_BAUD_SELECT(UART_BAUDRATE_SETTING, F_CPU));
 #endif
 
-#ifdef UART_SUPPORT
-	uart_init();
+#ifdef JOYSTICK_SUPPORT
+	joy_init();	
 #endif
 
 	sei();

src/random/persistentCounter.c

@@ -9,6 +9,7 @@
 #include "../compat/interrupt.h" /* cli() & sei() */
 #include "../compat/eeprom.h"
 #include "../config.h"
+#include "persistentCounter.h"
 
 #ifdef ERROR_HANDLING
 #	include "error-handling.h"
@@ -16,68 +17,67 @@
 #	define PERSISTENT_COUNTER_WRITER_ERROR	(void*)0, 2,4,2
 #endif
 
-#define RING_SIZE 168
-
-uint8_t ring_idx = 0xff;
-
-uint16_t  EEMEM B08_23;
-uint8_t EEMEM B0_7[RING_SIZE];
+uint8_t g_reset_counter_idx = 0xff;
+percnt_t EEMEM g_reset_counter;
 
 #ifdef INIT_EEPROM
-void init_buffer(void){
+void init_buffer(percnt_t *percnt, uint8_t *ring_index) {
 	uint8_t i;
 	eeprom_busy_wait();
-	eeprom_write_word(&B08_23, 0x0000);
+	eeprom_write_word(&(percnt->B08_23), 0x0000);
 	for (i = 0; i < RING_SIZE; ++i) {
 		eeprom_busy_wait();
-		eeprom_write_byte(&(B0_7[i]), 0x00);
+		eeprom_write_byte(&(percnt->B0_7[i]), 0x00);
 	}
 }
 #endif
 
-void percnt_init(void){
+void percnt_init(percnt_t *percnt, uint8_t *ring_index) {
 	uint8_t i;
 	uint8_t maxidx = 0;
-	uint8_t t,max=eeprom_read_byte(&(B0_7[0]));
+	uint8_t t, max = eeprom_read_byte(&(percnt->B0_7[0]));
 #ifdef INIT_EEPROM
-		if (eeprom_read_word(&B08_23)==0xFFFF){	/* test if the 2 MSB == 0xFFFF*/
-			if (eeprom_read_word((uint16_t*)&(B0_7[0]))==0xFFFF) /* test the first to bytes of ringbuffer*/
-				init_buffer();
+	/* test if the 2 MSB == 0xFFFF */
+	if (eeprom_read_word(&(percnt->B08_23)) == 0xFFFF) {
+		/* test the first two bytes of ringbuffer */
+		if (eeprom_read_word((uint16_t*) &(percnt->B0_7[0])) == 0xFFFF)
+			init_buffer(percnt, ring_index);
 	}
 #endif
-	for(i=0; i<RING_SIZE; ++i){ /* this might be speed up, but such optimisation could lead to timing attacks */
+	/* might be faster, but such optimizations are prone to timing attacks */
+	for (i = 0; i < RING_SIZE; ++i) {
 		eeprom_busy_wait();
-		t=eeprom_read_byte(&(B0_7[i]));
+		t = eeprom_read_byte(&(percnt->B0_7[i]));
 		if (t == max + 1) {
 			max = t;
 			maxidx = i;
 		}
 	}
-	ring_idx = (maxidx==RING_SIZE)?0:maxidx;
+	*ring_index = (maxidx == RING_SIZE) ? 0 : maxidx;
 }
 
-uint32_t percnt_get(void){
+uint32_t percnt_get(percnt_t *percnt, uint8_t *ring_index) {
 	uint32_t ret = 0;
 
-	if(ring_idx==0xff)
-		percnt_init();
+	if (*ring_index == 0xff)
+		percnt_init(percnt, ring_index);
 	cli();
 	eeprom_busy_wait();
-	ret=eeprom_read_word(&B08_23)<<8;
+	ret = eeprom_read_word(&(percnt->B08_23)) << 8;
 	eeprom_busy_wait();
-	ret |= eeprom_read_byte(&(B0_7[ring_idx]));
+	ret |= eeprom_read_byte(&(percnt->B0_7[*ring_index]));
 	sei();
 	return ret;
 }
 
-void percnt_inc(void){
+void percnt_inc(percnt_t *percnt, uint8_t *ring_index) {
 	/* we must make this resistant agaist power off while this is running ... */
 	uint32_t u;
 
-	if(ring_idx==0xff)
-		percnt_init();
+	if (*ring_index == 0xff)
+		percnt_init(percnt, ring_index);
 
-	u = percnt_get();
+	u = percnt_get(percnt, ring_index);
 	cli();
 	/* it's important to write msb first! */
 	if ((u & 0x000000ff) == 0xff) {
@@ -89,18 +89,20 @@ void percnt_inc(void){
 #endif
 			}
 			eeprom_busy_wait();
-			eeprom_write_byte(&(((uint8_t*)&B08_23)[1]),((u+1)>>16)&0xff);
+			eeprom_write_byte(&(((uint8_t*) &(percnt->B08_23))[1]),
+					((u + 1) >> 16) & 0xff);
 		}
 		eeprom_busy_wait();
-		eeprom_write_byte(&(((uint8_t*)&B08_23)[0]),((u+1)>>8)&0xff);
+		eeprom_write_byte(&(((uint8_t*) &(percnt->B08_23))[0]),
+				((u + 1) >> 8) & 0xff);
 	}
 	/* set least significant byte (in ringbuffer) */
-	ring_idx = (ring_idx+1)%RING_SIZE;
+	*ring_index = (*ring_index + 1) % RING_SIZE;
 	eeprom_busy_wait();
-	eeprom_write_byte(&(B0_7[ring_idx]),(u+1)&0xff);
+	eeprom_write_byte(&(percnt->B0_7[*ring_index]), (u + 1) & 0xff);
 	eeprom_busy_wait();
 
-	if(u+1 != percnt_get()){
+	if (u + 1 != percnt_get(percnt, ring_index)) {
 #ifdef ERROR_HANDLING
 		error(PERSISTENT_COUNTER_WRITER_ERROR);
 #endif

src/random/persistentCounter.h

@@ -9,15 +9,22 @@
 #ifndef PERSISTENTCOUNTER_H_
 #define PERSISTENTCOUNTER_H_
 
-
 #include <stdint.h>
+#include "../compat/eeprom.h"
 
 #define PERSISTENT_COUNTER_BITS 24
+#define RING_SIZE 168
 
-void percnt_init(void);
-uint32_t percnt_get(void);
-void percnt_inc(void);
+typedef struct percnt_s {
+	uint16_t B08_23;
+	uint8_t  B0_7[RING_SIZE];
+} percnt_t;
 
+extern uint8_t  g_reset_counter_idx;
+extern percnt_t g_reset_counter EEMEM;
 
+void percnt_init(percnt_t *percnt, uint8_t *ring_index);
+uint32_t percnt_get(percnt_t *percnt, uint8_t *ring_index);
+void percnt_inc(percnt_t *percnt, uint8_t *ring_index);
 
 #endif /*PERSISTENTCOUNTER_H_*/

src/scrolltext/scrolltext3.c

@@ -69,14 +69,9 @@ static void clear_text_pixmap(){
 	memset(text_pixmap, 0, NUM_ROWS * LINEBYTES);
 }
 
-void update_pixmap(){
-	unsigned char x, y, z;
-	for(x=NUMPLANE;x--;){
-		for(y=NUM_ROWS;y--;){
-			for(z=LINEBYTES;z--;){
-				pixmap[x][y][z] = (*text_pixmap)[y][z];
-			}
-		}
+static void update_pixmap(){
+	for(unsigned char p = NUMPLANE; p--;){
+		memcpy(&pixmap[p][0][0], text_pixmap, NUM_ROWS * LINEBYTES);
 	}
 }
 

src/simulator/main.c

@@ -62,7 +62,7 @@ int win;
 void wait(unsigned int ms) {
 	if (waitForFire) {
 		if (fakeport & 0x01) {
-			longjmp(newmode_jmpbuf, 43);
+			longjmp(newmode_jmpbuf, 0xFEu);
 		}
 	}
 

src/simulator/winmain.c

@@ -455,7 +455,7 @@ void wait(int ms)
 	{
 		if (fakeport & 0x01)
 		{
-			longjmp(newmode_jmpbuf, 43);
+			longjmp(newmode_jmpbuf, 0xFEu);
 		}
 	}
 

src/uart/Makefile

@@ -0,0 +1,16 @@
+MAKETOPDIR = ../..
+
+TARGET = libuart.a
+
+SRC_SIM :=
+
+include $(MAKETOPDIR)/defaults.mk
+
+ifeq ($(UART_SUPPORT),y)
+  SRC = uart.c
+  SRC += uart_commands.c
+endif
+
+include $(MAKETOPDIR)/rules.mk
+
+include $(MAKETOPDIR)/depend.mk

src/uart/config.in

@@ -0,0 +1 @@
+# nothing for now

src/uart/uart.c

@@ -1,188 +1,688 @@
-/* USART-Init beim ATmegaXX */
+/*************************************************************************
+Title:    Interrupt UART library with receive/transmit circular buffers
+Author:   Peter Fleury <pfleury@gmx.ch>   http://jump.to/fleury
+File:     $Id: uart.c,v 1.12 2014/01/08 21:58:12 peter Exp $
+Software: AVR-GCC 4.1, AVR Libc 1.4.6 or higher
+Hardware: any AVR with built-in UART,
+License:  GNU General Public License
 
+DESCRIPTION:
+    An interrupt is generated when the UART has finished transmitting or
+    receiving a byte. The interrupt handling routines use circular buffers
+    for buffering received and transmitted data.
 
+    The UART_RX_BUFFER_SIZE and UART_TX_BUFFER_SIZE variables define
+    the buffer size in bytes. Note that these variables must be a
+    power of 2.
+
+USAGE:
+    Refere to the header file uart.h for a description of the routines.
+    See also example test_uart.c.
+
+NOTES:
+    Based on Atmel Application Note AVR306
+
+LICENSE:
+    Copyright (C) 2006 Peter Fleury
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+*************************************************************************/
 #include <avr/io.h>
 #include <avr/interrupt.h>
-#include <stdlib.h>
-
-#include "config.h"
+#include <avr/pgmspace.h>
 #include "uart.h"
 
-#ifdef ATMEGA128
-#define UCSRB UCSR0B
-#define UCSRC UCSR0C
-#define UDR UDR0
-#define UBRRH UBRR0H
-#define UBRRL UBRR0L
-#define URSEL UMSEL
+
+/*
+ *  constants and macros
+ */
+
+/* size of RX/TX buffers */
+#define UART_RX_BUFFER_MASK ( UART_RX_BUFFER_SIZE - 1)
+#define UART_TX_BUFFER_MASK ( UART_TX_BUFFER_SIZE - 1)
+
+#if ( UART_RX_BUFFER_SIZE & UART_RX_BUFFER_MASK )
+#error RX buffer size is not a power of 2
+#endif
+#if ( UART_TX_BUFFER_SIZE & UART_TX_BUFFER_MASK )
+#error TX buffer size is not a power of 2
+#endif
+
+#if defined(__AVR_AT90S2313__) \
+ || defined(__AVR_AT90S4414__) || defined(__AVR_AT90S4434__) \
+ || defined(__AVR_AT90S8515__) || defined(__AVR_AT90S8535__) \
+ || defined(__AVR_ATmega103__)
+ /* old AVR classic or ATmega103 with one UART */
+ #define AT90_UART
+ #define UART0_RECEIVE_INTERRUPT   UART_RX_vect
+ #define UART0_TRANSMIT_INTERRUPT  UART_UDRE_vect
+ #define UART0_STATUS   USR
+ #define UART0_CONTROL  UCR
+ #define UART0_DATA     UDR
+ #define UART0_UDRIE    UDRIE
+#elif defined(__AVR_AT90S2333__) || defined(__AVR_AT90S4433__)
+ /* old AVR classic with one UART */
+ #define AT90_UART
+ #define UART0_RECEIVE_INTERRUPT   UART_RX_vect
+ #define UART0_TRANSMIT_INTERRUPT  UART_UDRE_vect
+ #define UART0_STATUS   UCSRA
+ #define UART0_CONTROL  UCSRB
+ #define UART0_DATA     UDR
+ #define UART0_UDRIE    UDRIE
+#elif  defined(__AVR_ATmega8__) || defined(__AVR_ATmega16__) || defined(__AVR_ATmega32__) \
+  || defined(__AVR_ATmega323__)
+  /* ATmega with one USART */
+ #define ATMEGA_USART
+ #define UART0_RECEIVE_INTERRUPT   USART_RXC_vect
+ #define UART0_TRANSMIT_INTERRUPT  USART_UDRE_vect
+ #define UART0_STATUS   UCSRA
+ #define UART0_CONTROL  UCSRB
+ #define UART0_DATA     UDR
+ #define UART0_UDRIE    UDRIE
+#elif defined (__AVR_ATmega8515__) || defined(__AVR_ATmega8535__)
+ #define ATMEGA_USART
+ #define UART0_RECEIVE_INTERRUPT   USART_RX_vect
+ #define UART0_TRANSMIT_INTERRUPT  USART_UDRE_vect
+ #define UART0_STATUS   UCSRA
+ #define UART0_CONTROL  UCSRB
+ #define UART0_DATA     UDR
+ #define UART0_UDRIE    UDRIE
+#elif defined(__AVR_ATmega163__)
+  /* ATmega163 with one UART */
+ #define ATMEGA_UART
+ #define UART0_RECEIVE_INTERRUPT   UART_RX_vect
+ #define UART0_TRANSMIT_INTERRUPT  UART_UDRE_vect
+ #define UART0_STATUS   UCSRA
+ #define UART0_CONTROL  UCSRB
+ #define UART0_DATA     UDR
+ #define UART0_UDRIE    UDRIE
+#elif defined(__AVR_ATmega162__)
+ /* ATmega with two USART */
+ #define ATMEGA_USART0
+ #define ATMEGA_USART1
+ #define UART0_RECEIVE_INTERRUPT   USART0_RXC_vect
+ #define UART1_RECEIVE_INTERRUPT   USART1_RXC_vect
+ #define UART0_TRANSMIT_INTERRUPT  USART0_UDRE_vect
+ #define UART1_TRANSMIT_INTERRUPT  USART1_UDRE_vect
+ #define UART0_STATUS   UCSR0A
+ #define UART0_CONTROL  UCSR0B
+ #define UART0_DATA     UDR0
+ #define UART0_UDRIE    UDRIE0
+ #define UART1_STATUS   UCSR1A
+ #define UART1_CONTROL  UCSR1B
+ #define UART1_DATA     UDR1
+ #define UART1_UDRIE    UDRIE1
+#elif defined(__AVR_ATmega64__) || defined(__AVR_ATmega128__)
+ /* ATmega with two USART */
+ #define ATMEGA_USART0
+ #define ATMEGA_USART1
+ #define UART0_RECEIVE_INTERRUPT   USART0_RX_vect
+ #define UART1_RECEIVE_INTERRUPT   USART1_RX_vect
+ #define UART0_TRANSMIT_INTERRUPT  USART0_UDRE_vect
+ #define UART1_TRANSMIT_INTERRUPT  USART1_UDRE_vect
+ #define UART0_STATUS   UCSR0A
+ #define UART0_CONTROL  UCSR0B
+ #define UART0_DATA     UDR0
+ #define UART0_UDRIE    UDRIE0
+ #define UART1_STATUS   UCSR1A
+ #define UART1_CONTROL  UCSR1B
+ #define UART1_DATA     UDR1
+ #define UART1_UDRIE    UDRIE1
+#elif defined(__AVR_ATmega161__)
+ /* ATmega with UART */
+ #error "AVR ATmega161 currently not supported by this libaray !"
+#elif defined(__AVR_ATmega169__)
+ /* ATmega with one USART */
+ #define ATMEGA_USART
+ #define UART0_RECEIVE_INTERRUPT   USART0_RX_vect
+ #define UART0_TRANSMIT_INTERRUPT  USART0_UDRE_vect
+ #define UART0_STATUS   UCSRA
+ #define UART0_CONTROL  UCSRB
+ #define UART0_DATA     UDR
+ #define UART0_UDRIE    UDRIE
+#elif defined(__AVR_ATmega48__) || defined(__AVR_ATmega88__) || defined(__AVR_ATmega168__) || defined(__AVR_ATmega48P__) || defined(__AVR_ATmega88P__) || defined(__AVR_ATmega168P__) || defined(__AVR_ATmega328P__) \
+ || defined(__AVR_ATmega3250__) || defined(__AVR_ATmega3290__) ||defined(__AVR_ATmega6450__) || defined(__AVR_ATmega6490__)
+ /* ATmega with one USART */
+ #define ATMEGA_USART0
+ #define UART0_RECEIVE_INTERRUPT   USART_RX_vect
+ #define UART0_TRANSMIT_INTERRUPT  USART_UDRE_vect
+ #define UART0_STATUS   UCSR0A
+ #define UART0_CONTROL  UCSR0B
+ #define UART0_DATA     UDR0
+ #define UART0_UDRIE    UDRIE0
+#elif defined(__AVR_ATtiny2313__)
+ #define ATMEGA_USART
+ #define UART0_RECEIVE_INTERRUPT   USART_RX_vect
+ #define UART0_TRANSMIT_INTERRUPT  USART_UDRE_vect
+ #define UART0_STATUS   UCSRA
+ #define UART0_CONTROL  UCSRB
+ #define UART0_DATA     UDR
+ #define UART0_UDRIE    UDRIE
+#elif defined(__AVR_ATmega329__) || \
+      defined(__AVR_ATmega649__) || \
+      defined(__AVR_ATmega325__) || \
+      defined(__AVR_ATmega645__)
+  /* ATmega with one USART */
+  #define ATMEGA_USART0
+  #define UART0_RECEIVE_INTERRUPT   USART0_RX_vect
+  #define UART0_TRANSMIT_INTERRUPT  USART0_UDRE_vect
+  #define UART0_STATUS   UCSR0A
+  #define UART0_CONTROL  UCSR0B
+  #define UART0_DATA     UDR0
+  #define UART0_UDRIE    UDRIE0
+#elif defined(__AVR_ATmega2560__) || defined(__AVR_ATmega2561__) || defined(__AVR_ATmega1280__)  || defined(__AVR_ATmega1281__) || defined(__AVR_ATmega640__)
+/* ATmega with two USART */
+  #define ATMEGA_USART0
+  #define ATMEGA_USART1
+  #define UART0_RECEIVE_INTERRUPT   USART0_RX_vect
+  #define UART1_RECEIVE_INTERRUPT   USART1_RX_vect
+  #define UART0_TRANSMIT_INTERRUPT  USART0_UDRE_vect
+  #define UART1_TRANSMIT_INTERRUPT  USART1_UDRE_vect
+  #define UART0_STATUS   UCSR0A
+  #define UART0_CONTROL  UCSR0B
+  #define UART0_DATA     UDR0
+  #define UART0_UDRIE    UDRIE0
+  #define UART1_STATUS   UCSR1A
+  #define UART1_CONTROL  UCSR1B
+  #define UART1_DATA     UDR1
+  #define UART1_UDRIE    UDRIE1
+#elif defined(__AVR_ATmega644__)
+ /* ATmega with one USART */
+ #define ATMEGA_USART0
+ #define UART0_RECEIVE_INTERRUPT   USART0_RX_vect
+ #define UART0_TRANSMIT_INTERRUPT  USART0_UDRE_vect
+ #define UART0_STATUS   UCSR0A
+ #define UART0_CONTROL  UCSR0B
+ #define UART0_DATA     UDR0
+ #define UART0_UDRIE    UDRIE0
+#elif defined(__AVR_ATmega164P__) || defined(__AVR_ATmega324P__) || defined(__AVR_ATmega644P__)
+ /* ATmega with two USART */
+ #define ATMEGA_USART0
+ #define ATMEGA_USART1
+ #define UART0_RECEIVE_INTERRUPT   USART0_RX_vect
+ #define UART1_RECEIVE_INTERRUPT   USART1_RX_vect
+ #define UART0_TRANSMIT_INTERRUPT  USART0_UDRE_vect
+ #define UART1_TRANSMIT_INTERRUPT  USART1_UDRE_vect
+ #define UART0_STATUS   UCSR0A
+ #define UART0_CONTROL  UCSR0B
+ #define UART0_DATA     UDR0
+ #define UART0_UDRIE    UDRIE0
+ #define UART1_STATUS   UCSR1A
+ #define UART1_CONTROL  UCSR1B
+ #define UART1_DATA     UDR1
+ #define UART1_UDRIE    UDRIE1
+#elif defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB647__) || defined(__AVR_AT90USB1287__)
+ /* AT90USBxx with one USART */
+ #define AT90USB_USART
+ #define UART0_RECEIVE_INTERRUPT   USART1_RX_vect
+ #define UART0_TRANSMIT_INTERRUPT  USART1_UDRE_vect
+ #define UART0_STATUS   UCSR1A
+ #define UART0_CONTROL  UCSR1B
+ #define UART0_DATA     UDR1
+ #define UART0_UDRIE    UDRIE1
+#elif defined __AVR
+ #error "no UART definition for MCU available"
 #endif
 
 
-#define UART_BAUD_CALC(UART_BAUD_RATE,F_OSC) ((F_OSC)/((UART_BAUD_RATE)*16L))
+/*
+ *  module global variables
+ */
+static volatile unsigned char UART_TxBuf[UART_TX_BUFFER_SIZE];
+static volatile unsigned char UART_RxBuf[UART_RX_BUFFER_SIZE];
+static volatile unsigned char UART_TxHead;
+static volatile unsigned char UART_TxTail;
+static volatile unsigned char UART_RxHead;
+static volatile unsigned char UART_RxTail;
+static volatile unsigned char UART_LastRxError;
 
-
-#ifdef UART_INTERRUPT
-volatile static char rxbuf[UART_RXBUFSIZE];
-volatile static char txbuf[UART_TXBUFSIZE];
-volatile static char *volatile rxhead, *volatile rxtail;
-volatile static char *volatile txhead, *volatile txtail;
-
-
-ISR(USART_UDRE_vect) {
-#ifdef UART_LEDS	
-	PORTC ^= 0x01;
+#if defined( ATMEGA_USART1 ) && defined (USE_UART1)
+static volatile unsigned char UART1_TxBuf[UART_TX_BUFFER_SIZE];
+static volatile unsigned char UART1_RxBuf[UART_RX_BUFFER_SIZE];
+static volatile unsigned char UART1_TxHead;
+static volatile unsigned char UART1_TxTail;
+static volatile unsigned char UART1_RxHead;
+static volatile unsigned char UART1_RxTail;
+static volatile unsigned char UART1_LastRxError;
 #endif
 
-	if ( txhead == txtail ) {
-		UCSRB &= ~(1 << UDRIE);		/* disable data register empty IRQ */
+
+
+ISR (UART0_RECEIVE_INTERRUPT)
+/*************************************************************************
+Function: UART Receive Complete interrupt
+Purpose:  called when the UART has received a character
+**************************************************************************/
+{
+    unsigned char tmphead;
+    unsigned char data;
+    unsigned char usr;
+    unsigned char lastRxError;
+
+
+    /* read UART status register and UART data register */
+    usr  = UART0_STATUS;
+    data = UART0_DATA;
+
+    /* */
+#if defined( AT90_UART )
+    lastRxError = (usr & (_BV(FE)|_BV(DOR)) );
+#elif defined( ATMEGA_USART )
+    lastRxError = (usr & (_BV(FE)|_BV(DOR)) );
+#elif defined( ATMEGA_USART0 )
+    lastRxError = (usr & (_BV(FE0)|_BV(DOR0)) );
+#elif defined ( ATMEGA_UART )
+    lastRxError = (usr & (_BV(FE)|_BV(DOR)) );
+#elif defined( AT90USB_USART )
+    lastRxError = (usr & (_BV(FE1)|_BV(DOR1)) );
+#endif
+
+    /* calculate buffer index */
+    tmphead = ( UART_RxHead + 1) & UART_RX_BUFFER_MASK;
+
+    if ( tmphead == UART_RxTail ) {
+        /* error: receive buffer overflow */
+        lastRxError = UART_BUFFER_OVERFLOW >> 8;
     }else{
-		UDR = *txtail;			/* schreibt das Zeichen x auf die Schnittstelle */
-		if (++txtail == (txbuf + UART_TXBUFSIZE)) txtail = txbuf;
+        /* store new index */
+        UART_RxHead = tmphead;
+        /* store received data in buffer */
+        UART_RxBuf[tmphead] = data;
+    }
+    UART_LastRxError |= lastRxError;
+}
+
+
+ISR (UART0_TRANSMIT_INTERRUPT)
+/*************************************************************************
+Function: UART Data Register Empty interrupt
+Purpose:  called when the UART is ready to transmit the next byte
+**************************************************************************/
+{
+    unsigned char tmptail;
+
+
+    if ( UART_TxHead != UART_TxTail) {
+        /* calculate and store new buffer index */
+        tmptail = (UART_TxTail + 1) & UART_TX_BUFFER_MASK;
+        UART_TxTail = tmptail;
+        /* get one byte from buffer and write it to UART */
+        UART0_DATA = UART_TxBuf[tmptail];  /* start transmission */
+    }else{
+        /* tx buffer empty, disable UDRE interrupt */
+        UART0_CONTROL &= ~_BV(UART0_UDRIE);
     }
 }
 
-ISR(USART_RXC_vect) {
-	int diff; 
 
-#ifdef UART_LEDS
-	PORTC ^= 0x02;
+/*************************************************************************
+Function: uart_init()
+Purpose:  initialize UART and set baudrate
+Input:    baudrate using macro UART_BAUD_SELECT()
+Returns:  none
+**************************************************************************/
+void uart_init(unsigned int baudrate)
+{
+    UART_TxHead = 0;
+    UART_TxTail = 0;
+    UART_RxHead = 0;
+    UART_RxTail = 0;
+
+#if defined( AT90_UART )
+    /* set baud rate */
+    UBRR = (unsigned char)baudrate;
+
+    /* enable UART receiver and transmmitter and receive complete interrupt */
+    UART0_CONTROL = _BV(RXCIE)|_BV(RXEN)|_BV(TXEN);
+
+#elif defined (ATMEGA_USART)
+    /* Set baud rate */
+    if ( baudrate & 0x8000 )
+    {
+    	 UART0_STATUS = (1<<U2X);  //Enable 2x speed
+    	 baudrate &= ~0x8000;
+    }
+    UBRRH = (unsigned char)(baudrate>>8);
+    UBRRL = (unsigned char) baudrate;
+
+    /* Enable USART receiver and transmitter and receive complete interrupt */
+    UART0_CONTROL = _BV(RXCIE)|(1<<RXEN)|(1<<TXEN);
+
+    /* Set frame format: asynchronous, 8data, no parity, 1stop bit */
+    #ifdef URSEL
+    UCSRC = (1<<URSEL)|(3<<UCSZ0);
+    #else
+    UCSRC = (3<<UCSZ0);
     #endif
 
-	/* buffer full? */
-	diff = rxhead - rxtail;
-	if ( diff < 0 ) diff += UART_RXBUFSIZE;
-	if (diff < UART_RXBUFSIZE -1) {
-		// buffer NOT full
-		*rxhead = UDR;
-		if (++rxhead == (rxbuf + UART_RXBUFSIZE)) rxhead = rxbuf;
+#elif defined (ATMEGA_USART0 )
+    /* Set baud rate */
+    if ( baudrate & 0x8000 )
+    {
+   		UART0_STATUS = (1<<U2X0);  //Enable 2x speed
+   		baudrate &= ~0x8000;
+   	}
+    UBRR0H = (unsigned char)(baudrate>>8);
+    UBRR0L = (unsigned char) baudrate;
+
+    /* Enable USART receiver and transmitter and receive complete interrupt */
+    UART0_CONTROL = _BV(RXCIE0)|(1<<RXEN0)|(1<<TXEN0);
+
+    /* Set frame format: asynchronous, 8data, no parity, 1stop bit */
+    #ifdef URSEL0
+    UCSR0C = (1<<URSEL0)|(3<<UCSZ00);
+    #else
+    UCSR0C = (3<<UCSZ00);
+    #endif
+
+#elif defined ( ATMEGA_UART )
+    /* set baud rate */
+    if ( baudrate & 0x8000 )
+    {
+    	UART0_STATUS = (1<<U2X);  //Enable 2x speed
+    	baudrate &= ~0x8000;
+    }
+    UBRRHI = (unsigned char)(baudrate>>8);
+    UBRR   = (unsigned char) baudrate;
+
+    /* Enable UART receiver and transmitter and receive complete interrupt */
+    UART0_CONTROL = _BV(RXCIE)|(1<<RXEN)|(1<<TXEN);
+
+#elif defined ( AT90USB_USART )
+   /* set baud rate */
+    if ( baudrate & 0x8000 )
+    {
+    	UART0_STATUS = (1<<U2X1 );  //Enable 2x speed
+    	baudrate &= ~0x8000;
+    }
+    UBRR1H = (unsigned char)(baudrate>>8);
+    UBRR1L = (unsigned char) baudrate;
+
+    /* Enable UART receiver and transmitter and receive complete interrupt */
+    UART0_CONTROL = _BV(RXCIE1)|(1<<RXEN1)|(1<<TXEN1);
+
+    /* Set frame format: asynchronous, 8data, no parity, 1stop bit */
+    UCSR1C = (1<<UCSZ11)|(1<<UCSZ10);
+#endif
+
+}/* uart_init */
+
+
+/*************************************************************************
+Function: uart_getc()
+Purpose:  return byte from ringbuffer
+Returns:  lower byte:  received byte from ringbuffer
+          higher byte: last receive error
+**************************************************************************/
+unsigned int uart_getc(void)
+{
+    unsigned char tmptail;
+    unsigned char data;
+
+
+    if ( UART_RxHead == UART_RxTail ) {
+        return UART_NO_DATA;   /* no data available */
+    }
+
+    /* calculate /store buffer index */
+    tmptail = (UART_RxTail + 1) & UART_RX_BUFFER_MASK;
+    UART_RxTail = tmptail;
+
+    /* get data from receive buffer */
+    data = UART_RxBuf[tmptail];
+
+    data = (UART_LastRxError << 8) + data;
+    UART_LastRxError = 0;
+    return data;
+
+}/* uart_getc */
+
+
+/*************************************************************************
+Function: uart_putc()
+Purpose:  write byte to ringbuffer for transmitting via UART
+Input:    byte to be transmitted
+Returns:  none
+**************************************************************************/
+void uart_putc(unsigned char data)
+{
+    unsigned char tmphead;
+
+
+    tmphead  = (UART_TxHead + 1) & UART_TX_BUFFER_MASK;
+
+    while ( tmphead == UART_TxTail ){
+        ;/* wait for free space in buffer */
+    }
+
+    UART_TxBuf[tmphead] = data;
+    UART_TxHead = tmphead;
+
+    /* enable UDRE interrupt */
+    UART0_CONTROL    |= _BV(UART0_UDRIE);
+
+}/* uart_putc */
+
+
+/*************************************************************************
+Function: uart_puts()
+Purpose:  transmit string to UART
+Input:    string to be transmitted
+Returns:  none
+**************************************************************************/
+void uart_puts(const char *s )
+{
+    while (*s)
+      uart_putc(*s++);
+
+}/* uart_puts */
+
+
+/*************************************************************************
+Function: uart_puts_p()
+Purpose:  transmit string from program memory to UART
+Input:    program memory string to be transmitted
+Returns:  none
+**************************************************************************/
+void uart_puts_p(const char *progmem_s )
+{
+    register char c;
+
+    while ( (c = pgm_read_byte(progmem_s++)) )
+      uart_putc(c);
+
+}/* uart_puts_p */
+
+
+/*
+ * these functions are only for ATmegas with two USART
+ */
+#if defined( ATMEGA_USART1 ) && defined (USE_UART1)
+
+ISR(UART1_RECEIVE_INTERRUPT)
+/*************************************************************************
+Function: UART1 Receive Complete interrupt
+Purpose:  called when the UART1 has received a character
+**************************************************************************/
+{
+    unsigned char tmphead;
+    unsigned char data;
+    unsigned char usr;
+    unsigned char lastRxError;
+
+
+    /* read UART status register and UART data register */
+    usr  = UART1_STATUS;
+    data = UART1_DATA;
+
+    /* */
+    lastRxError = (usr & (_BV(FE1)|_BV(DOR1)) );
+
+    /* calculate buffer index */
+    tmphead = ( UART1_RxHead + 1) & UART_RX_BUFFER_MASK;
+
+    if ( tmphead == UART1_RxTail ) {
+        /* error: receive buffer overflow */
+        lastRxError = UART_BUFFER_OVERFLOW >> 8;
     }else{
-		UDR;				//reads the buffer to clear the interrupt condition
+        /* store new index */
+        UART1_RxHead = tmphead;
+        /* store received data in buffer */
+        UART1_RxBuf[tmphead] = data;
     }
+    UART1_LastRxError |= lastRxError;
 }
 
-#endif // UART_INTERRUPT
 
-
-void uart_init() {
-	PORTD |= 0x01;				//Pullup an RXD an
-
-	UCSRA = 0;
-	UCSRB |= (1<<TXEN);			//UART TX einschalten
-	UCSRC |= (1<<URSEL)|(3<<UCSZ0);		//Asynchron 8N1
-
-	UCSRB |= ( 1 << RXEN );			//Uart RX einschalten
-
-//	UBRRH=(uint8_t)(UART_BAUD_CALC(UART_BAUD_RATE,F_CPU)>>8);
-//	UBRRL=(uint8_t)(UART_BAUD_CALC(UART_BAUD_RATE,F_CPU));
-
-	UBRRL = 8;
-
-#ifdef UART_INTERRUPT
-	// init buffers
-	rxhead = rxtail = rxbuf;
-	txhead = txtail = txbuf;
-
-	// activate rx IRQ
-	UCSRB |= (1 << RXCIE);
-#endif // UART_INTERRUPT
-}
-
-#ifdef UART_INTERRUPT
-void uart_putc(char c) {
-	volatile int diff;
-
-	/* buffer full? */
-	do {
-		diff = txhead - txtail;
-		if ( diff < 0 ) diff += UART_TXBUFSIZE;
-	} while ( diff >= UART_TXBUFSIZE -1 );
-
-	cli();
-	*txhead = c;
- 	if (++txhead == (txbuf + UART_TXBUFSIZE)) txhead = txbuf;
-
-	UCSRB |= (1 << UDRIE);		/* enable data register empty IRQ */
-	sei();
-}
-#else  // WITHOUT INTERRUPT
-void uart_putc(char c) {
-	while (!(UCSRA & (1<<UDRE))); /* warten bis Senden moeglich                   */
-	UDR = c;                      /* schreibt das Zeichen x auf die Schnittstelle */
-}
-#endif // UART_INTERRUPT
-
-
-void uart_putstr(char *str) {
-	while(*str) {
-		uart_putc(*str++);
-	}
-}
-
-void uart_putstr_P(PGM_P str) {
-	char tmp;
-	while((tmp = pgm_read_byte(str))) {
-		uart_putc(tmp);
-		str++;
-	}
-}
-
-void uart_hexdump(char *buf, int len)
+ISR(UART1_TRANSMIT_INTERRUPT)
+/*************************************************************************
+Function: UART1 Data Register Empty interrupt
+Purpose:  called when the UART1 is ready to transmit the next byte
+**************************************************************************/
 {
-	unsigned char x=0;
-	char sbuf[3];
+    unsigned char tmptail;
 
-	while(len--){
-		itoa(*buf++, sbuf, 16);
-		if (sbuf[1] == 0) uart_putc(' ');
-		uart_putstr(sbuf);
-		uart_putc(' ');
-		if(++x == 16) {
-			uart_putstr_P(PSTR("\r\n"));
-			x = 0;
-		}
+
+    if ( UART1_TxHead != UART1_TxTail) {
+        /* calculate and store new buffer index */
+        tmptail = (UART1_TxTail + 1) & UART_TX_BUFFER_MASK;
+        UART1_TxTail = tmptail;
+        /* get one byte from buffer and write it to UART */
+        UART1_DATA = UART1_TxBuf[tmptail];  /* start transmission */
+    }else{
+        /* tx buffer empty, disable UDRE interrupt */
+        UART1_CONTROL &= ~_BV(UART1_UDRIE);
     }
 }
 
 
-#ifdef UART_INTERRUPT
-char uart_getc()
+/*************************************************************************
+Function: uart1_init()
+Purpose:  initialize UART1 and set baudrate
+Input:    baudrate using macro UART_BAUD_SELECT()
+Returns:  none
+**************************************************************************/
+void uart1_init(unsigned int baudrate)
 {
-	char val;
+    UART1_TxHead = 0;
+    UART1_TxTail = 0;
+    UART1_RxHead = 0;
+    UART1_RxTail = 0;
 
-	while(rxhead==rxtail) ;
 
-	val = *rxtail;
- 	if (++rxtail == (rxbuf + UART_RXBUFSIZE)) rxtail = rxbuf;
-
-	return val;
-}
-#else  // WITHOUT INTERRUPT
-char uart_getc()
+    /* Set baud rate */
+    if ( baudrate & 0x8000 )
     {
-	while (!(UCSRA & (1<<RXC)));	// warten bis Zeichen verfuegbar
-	return UDR;			// Zeichen aus UDR zurueckgeben
+    	UART1_STATUS = (1<<U2X1);  //Enable 2x speed
+      baudrate &= ~0x8000;
     }
-#endif // UART_INTERRUPT
+    UBRR1H = (unsigned char)(baudrate>>8);
+    UBRR1L = (unsigned char) baudrate;
 
-// returns 1 on success
-#ifdef UART_INTERRUPT
-char uart_getc_nb(char *c)
+    /* Enable USART receiver and transmitter and receive complete interrupt */
+    UART1_CONTROL = _BV(RXCIE1)|(1<<RXEN1)|(1<<TXEN1);
+
+    /* Set frame format: asynchronous, 8data, no parity, 1stop bit */
+    #ifdef URSEL1
+    UCSR1C = (1<<URSEL1)|(3<<UCSZ10);
+    #else
+    UCSR1C = (3<<UCSZ10);
+    #endif
+}/* uart_init */
+
+
+/*************************************************************************
+Function: uart1_getc()
+Purpose:  return byte from ringbuffer
+Returns:  lower byte:  received byte from ringbuffer
+          higher byte: last receive error
+**************************************************************************/
+unsigned int uart1_getc(void)
 {
-	if (rxhead==rxtail) return 0;
+    unsigned char tmptail;
+    unsigned char data;
 
-	*c = *rxtail;
- 	if (++rxtail == (rxbuf + UART_RXBUFSIZE)) rxtail = rxbuf;
 
-	return 1;
+    if ( UART1_RxHead == UART1_RxTail ) {
+        return UART_NO_DATA;   /* no data available */
     }
-#else  // WITHOUT INTERRUPT
-char uart_getc_nb(char *c)
+
+    /* calculate /store buffer index */
+    tmptail = (UART1_RxTail + 1) & UART_RX_BUFFER_MASK;
+    UART1_RxTail = tmptail;
+
+    /* get data from receive buffer */
+    data = UART1_RxBuf[tmptail];
+
+    data = (UART1_LastRxError << 8) + data;
+    UART1_LastRxError = 0;
+    return data;
+
+}/* uart1_getc */
+
+
+/*************************************************************************
+Function: uart1_putc()
+Purpose:  write byte to ringbuffer for transmitting via UART
+Input:    byte to be transmitted
+Returns:  none
+**************************************************************************/
+void uart1_putc(unsigned char data)
 {
-	if (UCSRA & (1<<RXC)) {		// Zeichen verfuegbar
-		*c = UDR;
-		return 1;
+    unsigned char tmphead;
+
+
+    tmphead  = (UART1_TxHead + 1) & UART_TX_BUFFER_MASK;
+
+    while ( tmphead == UART1_TxTail ){
+        ;/* wait for free space in buffer */
     }
 
-	return 0;
-}
-#endif // UART_INTERRUPT
+    UART1_TxBuf[tmphead] = data;
+    UART1_TxHead = tmphead;
+
+    /* enable UDRE interrupt */
+    UART1_CONTROL    |= _BV(UART1_UDRIE);
+
+}/* uart1_putc */
+
+
+/*************************************************************************
+Function: uart1_puts()
+Purpose:  transmit string to UART1
+Input:    string to be transmitted
+Returns:  none
+**************************************************************************/
+void uart1_puts(const char *s )
+{
+    while (*s)
+      uart1_putc(*s++);
+
+}/* uart1_puts */
+
+
+/*************************************************************************
+Function: uart1_puts_p()
+Purpose:  transmit string from program memory to UART1
+Input:    program memory string to be transmitted
+Returns:  none
+**************************************************************************/
+void uart1_puts_p(const char *progmem_s )
+{
+    register char c;
+
+    while ( (c = pgm_read_byte(progmem_s++)) )
+      uart1_putc(c);
+
+}/* uart1_puts_p */
+
+#endif

src/uart/uart.h

@@ -1,35 +1,223 @@
 #ifndef UART_H
 #define UART_H
+/************************************************************************
+Title:    Interrupt UART library with receive/transmit circular buffers
+Author:   Peter Fleury <pfleury@gmx.ch>   http://jump.to/fleury
+File:     $Id: uart.h,v 1.12 2012/11/19 19:52:27 peter Exp $
+Software: AVR-GCC 4.1, AVR Libc 1.4
+Hardware: any AVR with built-in UART, tested on AT90S8515 & ATmega8 at 4 Mhz
+License:  GNU General Public License
+Usage:    see Doxygen manual
+
+LICENSE:
+    Copyright (C) 2006 Peter Fleury
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+************************************************************************/
 
 /**
- * UART Library
+ *  @defgroup pfleury_uart UART Library
+ *  @code #include <uart.h> @endcode
  *
- * #define F_CPU 16000000         // Oszillator-Frequenz in Hz
- * #define UART_INTERRUPT 1
- * #define UART_BAUD_RATE 19200
- * #define UART_RXBUFSIZE 16
- * #define UART_TXBUFSIZE 16
- * #define UART_LINE_BUFFER_SIZE 40
- * #define UART_LEDS             // LED1 and LED2 toggle on tx and rx interrupt
+ *  @brief Interrupt UART library using the built-in UART with transmit and
+ *         receive circular buffers.
  *
+ *  This library can be used to transmit and receive data through the built in
+ *  UART.
+ *
+ *  An interrupt is generated when the UART has finished transmitting or
+ *  receiving a byte. The interrupt handling routines use circular buffers
+ *  for buffering received and transmitted data.
+ *
+ *  The UART_RX_BUFFER_SIZE and UART_TX_BUFFER_SIZE constants define the size of
+ *  the circular buffers in bytes. Note that these constants must be a power of
+ *  2. You may need to adapt this constants to your target and your application
+ *  by adding CDEFS += -DUART_RX_BUFFER_SIZE=nn -DUART_RX_BUFFER_SIZE=nn to your
+ *  Makefile.
+ *
+ *  @note Based on Atmel Application Note AVR306
+ *  @author Peter Fleury pfleury@gmx.ch  http://jump.to/fleury
  */
 
-#include <inttypes.h>
-#include <avr/pgmspace.h>
+/**@{*/
 
-void uart_init();
-
-void uart_putc(char c);
-void uart_putstr(char * str);
-void uart_putstr_P(PGM_P str);
-void uart_hexdump(char *buf, int len);
-
-char uart_getc();
-char uart_getc_nb(char *c);		// returns 1 on success
-
-//get one Cariage return terminated line
-//echo charakters back on Uart
-//returns buffer with zero terminated line on success, 0 pointer otherwise
-char * uart_getline_nb();
+#include "../config.h"
 
+#if (__GNUC__ * 100 + __GNUC_MINOR__) < 304
+#error "This library requires AVR-GCC 3.4 or later, update to newer AVR-GCC compiler !"
 #endif
+
+
+/*
+ * constants and macros
+ */
+
+/** @brief  UART Baudrate Expression
+ *  @param  xtalcpu  system clock in Mhz, e.g. 4000000UL for 4Mhz
+ *  @param  baudrate baudrate in bps, e.g. 1200, 2400, 9600
+ */
+#define UART_BAUD_SELECT(baudRate,xtalCpu) \
+	(((xtalCpu) + 8UL * (baudRate)) / (16UL * (baudRate)) -1UL)
+
+/** @brief  UART Baudrate Expression for ATmega double speed mode
+ *  @param  xtalcpu  system clock in Mhz, e.g. 4000000UL for 4Mhz
+ *  @param  baudrate baudrate in bps, e.g. 1200, 2400, 9600
+ */
+#define UART_BAUD_SELECT_DOUBLE_SPEED(baudRate,xtalCpu) \
+	(((((xtalCpu) + 4UL * (baudRate)) / (8UL * (baudRate)) -1UL)) | 0x8000)
+
+
+/** Size of the circular receive buffer, must be power of 2 */
+#ifndef UART_RX_BUFFER_SIZE
+#define UART_RX_BUFFER_SIZE 32
+#endif
+
+/** Size of the circular transmit buffer, must be power of 2 */
+#ifndef UART_TX_BUFFER_SIZE
+#define UART_TX_BUFFER_SIZE 32
+#endif
+
+/* test if the size of the circular buffers fits into SRAM */
+#if ( (UART_RX_BUFFER_SIZE+UART_TX_BUFFER_SIZE) >= (RAMEND-0x60 ) ) && defined __AVR
+#error "size of UART_RX_BUFFER_SIZE + UART_TX_BUFFER_SIZE larger than size of SRAM"
+#endif
+
+/*
+** high byte error return code of uart_getc()
+*/
+#define UART_FRAME_ERROR      0x1000           /* Framing Error by UART       */
+#define UART_OVERRUN_ERROR    0x0800           /* Overrun condition by UART   */
+#define UART_PARITY_ERROR     0x0400           /* Parity Error by UART        */
+#define UART_BUFFER_OVERFLOW  0x0200           /* receive ringbuffer overflow */
+#define UART_NO_DATA          0x0100           /* no receive data available   */
+
+
+/*
+** function prototypes
+*/
+
+/**
+   @brief   Initialize UART and set baudrate
+   @param   baudrate Specify baudrate using macro UART_BAUD_SELECT()
+   @return  none
+*/
+extern void uart_init(unsigned int baudrate);
+
+
+/**
+ *  @brief   Get received byte from ringbuffer
+ *
+ * Returns in the lower byte the received character and in the
+ * higher byte the last receive error.
+ * UART_NO_DATA is returned when no data is available.
+ *
+ *  @param   void
+ *  @return  lower byte:  received byte from ringbuffer
+ *  @return  higher byte: last receive status
+ *           - \b 0 successfully received data from UART
+ *           - \b UART_NO_DATA
+ *             <br>no receive data available
+ *           - \b UART_BUFFER_OVERFLOW
+ *             <br>Receive ringbuffer overflow.
+ *             We are not reading the receive buffer fast enough,
+ *             one or more received character have been dropped
+ *           - \b UART_OVERRUN_ERROR
+ *             <br>Overrun condition by UART.
+ *             A character already present in the UART UDR register was not read
+ *             by the interrupt handler before the next character arrived,
+ *             one or more received characters have been dropped.
+ *           - \b UART_FRAME_ERROR
+ *             <br>Framing Error by UART
+ */
+extern unsigned int uart_getc(void);
+
+
+/**
+ *  @brief   Put byte to ringbuffer for transmitting via UART
+ *  @param   data byte to be transmitted
+ *  @return  none
+ */
+extern void uart_putc(unsigned char data);
+
+
+/**
+ *  @brief   Put string to ringbuffer for transmitting via UART
+ *
+ *  The string is buffered by the uart library in a circular buffer
+ *  and one character at a time is transmitted to the UART using interrupts.
+ *  Blocks if it can not write the whole string into the circular buffer.
+ *
+ *  @param   s string to be transmitted
+ *  @return  none
+ */
+extern void uart_puts(const char *s );
+
+
+/**
+ * @brief    Put string from program memory to ringbuffer for transmitting via
+ *           UART.
+ *
+ * The string is buffered by the uart library in a circular buffer
+ * and one character at a time is transmitted to the UART using interrupts.
+ * Blocks if it can not write the whole string into the circular buffer.
+ *
+ * @param    s program memory string to be transmitted
+ * @return   none
+ * @see      uart_puts_P
+ */
+extern void uart_puts_p(const char *s );
+
+/**
+ * @brief    Macro to automatically put a string constant into program memory
+ */
+#define uart_puts_P(__s)       uart_puts_p(PSTR(__s))
+
+
+#if defined USE_UART1 || defined DOXYGEN
+
+/** @brief  Initialize USART1 (only available on selected ATmegas)
+ *  @see    uart_init
+ */
+extern void uart1_init(unsigned int baudrate);
+
+/** @brief  Get received byte of USART1 from ringbuffer (only available on
+ *          selected ATmega)
+ *  @see    uart_getc
+ */
+extern unsigned int uart1_getc(void);
+
+/** @brief  Put byte to ringbuffer for transmitting via USART1 (only available
+ *          on selected ATmega)
+ *  @see    uart_putc
+ */
+extern void uart1_putc(unsigned char data);
+
+/** @brief  Put string to ringbuffer for transmitting via USART1 (only available
+ *          on selected ATmega)
+ *  @see    uart_puts
+ */
+extern void uart1_puts(const char *s );
+
+/** @brief  Put string from program memory to ringbuffer for transmitting via
+ *          USART1 (only available on selected ATmega)
+ *  @see    uart_puts_p
+ */
+extern void uart1_puts_p(const char *s );
+
+/** @brief  Macro to automatically put a string constant into program memory */
+#define uart1_puts_P(__s) uart1_puts_p(PSTR(__s))
+
+/**@}*/
+
+#endif // defined USE_UART1 || defined DOXYGEN
+
+#endif // UART_H

src/uart/uart_commands.c

@@ -0,0 +1,503 @@
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+#include <stdbool.h>
+#include <setjmp.h>
+#include <limits.h>
+#include <avr/interrupt.h>
+#include <avr/pgmspace.h>
+#include <avr/eeprom.h>
+#include "../config.h"
+#include "../borg_hw/borg_hw.h"
+#ifdef JOYSTICK_SUPPORT
+	#include "../joystick/joystick.h"
+	extern unsigned char waitForFire;
+#endif
+#include "../scrolltext/scrolltext.h"
+#include "../animations/program.h"
+#include "uart.h"
+#include "uart_commands.h"
+
+#ifndef USE_UART1
+#	define UART_PUTS(STR) uart_puts(STR)
+#	define UART_PUTS_P(STR) uart_puts_p(STR)
+#	define UART_GETC uart_getc
+#	define UART_PUTC uart_putc
+#else
+#	define UART_PUTS(STR) uart1_puts(STR)
+#	define UART_PUTS_P(STR) uart1_puts_p(STR)
+#	define UART_GETC uart1_getc
+#	define UART_PUTC uart1_putc
+#endif
+
+#define UART_BUFFER_SIZE (SCROLLTEXT_BUFFER_SIZE + 8)
+char g_rx_buffer[UART_BUFFER_SIZE];
+uint8_t g_rx_index;
+
+extern jmp_buf newmode_jmpbuf;
+extern volatile unsigned char mode;
+extern volatile unsigned char reverseMode;
+
+#define CR "\r\n"
+
+#if (!(defined(eeprom_update_block) && \
+	((E2PAGESIZE == 2) || (E2PAGESIZE == 4) || (E2PAGESIZE == 8)))) || \
+	!(defined(ANIMATION_TESTS))
+char const UART_STR_NOTIMPL[] PROGMEM = "Not implemented."CR;
+#endif
+
+char const UART_STR_CLEARLINE[]  PROGMEM = "\r\033[J";
+char const UART_STR_BACKSPACE[]  PROGMEM = "\b \b";
+char const UART_STR_PROMPT[]     PROGMEM = "> ";
+char const UART_STR_MODE[]       PROGMEM = "%d"CR;
+char const UART_STR_MODE_ERR[]   PROGMEM = "Range is between 0 and 255."CR;
+char const UART_STR_GAMEMO_ERR[] PROGMEM = "No mode change during games."CR;
+char const UART_STR_GAMETX_ERR[] PROGMEM = "No text messages during games."CR;
+char const UART_STR_UART_ERR[]   PROGMEM = "Transmission error."CR;
+char const UART_STR_UNKNOWN[]    PROGMEM = "Unknown command or syntax error."CR;
+char const UART_STR_TOOLONG[]    PROGMEM = CR"Command is too long."CR;
+char const UART_STR_HELP[]       PROGMEM = "Allowed commands: erase help mode "
+                                           "msg next prev reset scroll test"CR;
+
+char const UART_CMD_ERASE[]      PROGMEM = "erase";
+char const UART_CMD_HELP[]       PROGMEM = "help";
+char const UART_CMD_MODE[]       PROGMEM = "mode";
+char const UART_CMD_MSG[]        PROGMEM = "msg ";
+char const UART_CMD_NEXT[]       PROGMEM = "next";
+char const UART_CMD_PREV[]       PROGMEM = "prev";
+char const UART_CMD_RESET[]      PROGMEM = "reset";
+char const UART_CMD_SCROLL[]     PROGMEM = "scroll ";
+char const UART_CMD_TEST[]       PROGMEM = "test";
+
+#ifdef ANIMATION_TESTS
+char const UART_STR_TEST_EXIT[]  PROGMEM = "Press ENTER to exit test."CR;
+char const UART_STR_TEST_ERR[]   PROGMEM = "Range is between 0 and %d."CR;
+char const UART_STR_GAMETS_ERR[] PROGMEM = "No display tests during games."CR;
+char const UART_STR_TEST_UP[]    PROGMEM = "UP ";
+char const UART_STR_TEST_DOWN[]  PROGMEM = "DOWN ";
+char const UART_STR_TEST_LEFT[]  PROGMEM = "LEFT ";
+char const UART_STR_TEST_RIGHT[] PROGMEM = "RIGHT ";
+char const UART_STR_TEST_FIRE[]  PROGMEM = "FIRE";
+
+enum uartcmd_joytest_e {
+	UARTCMD_JOY_UP    = 0x01,
+	UARTCMD_JOY_DOWN  = 0x02,
+	UARTCMD_JOY_LEFT  = 0x04,
+	UARTCMD_JOY_RIGHT = 0x08,
+	UARTCMD_JOY_FIRE  = 0x10
+};
+
+#	ifdef NDEBUG
+	typedef uint8_t uartcmd_joytest_t;
+#	else
+	typedef enum uartcmd_joytest_e uartcmd_joytest_t;
+#	endif
+#endif
+
+
+bool g_uartcmd_permit_processing = 1;
+
+
+/**
+ * Checks if command processing is allowed.
+ */
+static bool uartcmd_processing_allowed(void) {
+	bool result;
+	cli();
+	result = g_uartcmd_permit_processing;
+	sei();
+	return result;
+}
+
+
+/**
+ * Clears the command string buffer.
+ */
+static void uartcmd_clear_buffer(void) {
+	char *p = &g_rx_buffer[0];
+	for (uint8_t i = UART_BUFFER_SIZE; i--;) {
+		*p++ = 0;
+	}
+	g_rx_index = 0;
+}
+
+
+/**
+ * Erases the complete EEPROM to reset counters and high score tables.
+ */
+static void uartcmd_erase_eeprom(void) {
+#if defined(eeprom_update_block) && \
+	((E2PAGESIZE == 2) || (E2PAGESIZE == 4) || (E2PAGESIZE == 8))
+	uint8_t const eeclear[] =
+#	if E2PAGESIZE == 8
+		{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
+#	elif E2PAGESIZE == 4
+		{0xFF, 0xFF, 0xFF, 0xFF};
+#	elif E2PAGESIZE == 2
+		{0xFF, 0xFF};
+#	endif
+	for (void *ee = 0; ee < (void *)E2END; ee += E2PAGESIZE) {
+		eeprom_busy_wait();
+		eeprom_update_block(eeclear, ee, E2PAGESIZE);
+	}
+#else
+	UART_PUTS_P(UART_STR_NOTIMPL);
+#endif
+}
+
+
+/**
+ * Displays a simple message without the need to prefix a scrolltext command.
+ */
+static void uartcmd_simple_message(void) {
+	if (uartcmd_processing_allowed()) {
+		uartcmd_forbid();
+#ifdef JOYSTICK_SUPPORT
+		if (waitForFire) {
+			waitForFire = 0;
+#endif
+			g_rx_buffer[1] = '<';
+			g_rx_buffer[2] = '/';
+			g_rx_buffer[3] = '#';
+			// text must not be longer than the scroll text buffer
+			g_rx_buffer[1 + SCROLLTEXT_BUFFER_SIZE - 1] = 0;
+			scrolltext(&g_rx_buffer[1]);
+
+#ifdef JOYSTICK_SUPPORT
+			waitForFire = 1;
+		} else {
+			UART_PUTS_P(UART_STR_GAMETX_ERR);
+		}
+#endif
+		uartcmd_permit();
+	}
+}
+
+
+/**
+ * Displays a message which may use the complete range of scrolltext commands.
+ */
+static void uartcmd_scroll_message(void) {
+	if (uartcmd_processing_allowed()) {
+		uartcmd_forbid();
+#ifdef JOYSTICK_SUPPORT
+		if (waitForFire) {
+			waitForFire = 0;
+#endif
+			// text must not be longer than the scroll text buffer
+			g_rx_buffer[7 + SCROLLTEXT_BUFFER_SIZE - 1] = 0;
+			scrolltext(&g_rx_buffer[7]);
+#ifdef JOYSTICK_SUPPORT
+			waitForFire = 1;
+		} else {
+			UART_PUTS_P(UART_STR_GAMETX_ERR);
+		}
+#endif
+		uartcmd_permit();
+	}
+}
+
+
+/**
+ * As long there's no game active, jump to the next animation.
+ */
+static void uartcmd_next_anim(void) {
+#ifdef JOYSTICK_SUPPORT
+	if (waitForFire) {
+#endif
+		UART_PUTS_P(UART_STR_PROMPT);
+		uartcmd_clear_buffer();
+		longjmp(newmode_jmpbuf, mode);
+#ifdef JOYSTICK_SUPPORT
+	} else {
+		UART_PUTS_P(UART_STR_GAMEMO_ERR);
+	}
+#endif
+}
+
+
+/**
+ * As long there's no game active, jump to the previous animation.
+ */
+static void uartcmd_prev_anim(void) {
+#ifdef JOYSTICK_SUPPORT
+	if (waitForFire) {
+#endif
+		reverseMode = mode - 2;
+		UART_PUTS_P(UART_STR_PROMPT);
+		uartcmd_clear_buffer();
+		longjmp(newmode_jmpbuf, mode - 2);
+#ifdef JOYSTICK_SUPPORT
+	} else {
+		UART_PUTS_P(UART_STR_GAMEMO_ERR);
+	}
+#endif
+}
+
+
+/**
+ * Extracts a positive number from an ASCII string (up to INT_MAX).
+ * @param buffer String to be examined. Preceding whitespaces are skipped.
+ *               ASCII control characters and [Space] act as delimiters.
+ * @return The extracted number or -1 if a conversion error occurred.
+ */
+int uartcmd_extract_num_arg(char *buffer) {
+	int res = -1;
+	uint8_t i = 0;
+	while (buffer[i] <= ' ' && buffer[i] != 0) ++i; // skip whitespaces
+	for (; buffer[i] > 0x20; ++i) {
+		if (res < 0) {
+			res = 0;
+		}
+		int const d = buffer[i] - '0';
+		if (isdigit(buffer[i]) && (res <= (INT_MAX / 10)) &&
+				((res * 10) <= (INT_MAX - d))) {
+			res = res * 10 + d;
+		} else {
+			res = -1;
+			break;
+		}
+	}
+	return res;
+}
+
+
+/**
+ * Outputs current mode number via UART.
+ */
+static void uartcmd_print_mode(void) {
+	char mode_output[6] = "";
+	snprintf_P(mode_output, 6, UART_STR_MODE, mode - 1);
+	uart_puts(mode_output);
+}
+
+
+/**
+ * Retrieves desired mode number from command line and switches to that mode.
+ */
+static void uartcmd_mode(void) {
+	if (g_rx_buffer[4] != 0) {
+		int new_mode = uartcmd_extract_num_arg(&g_rx_buffer[4]);
+		if (new_mode <= UINT8_MAX) {
+#ifdef JOYSTICK_SUPPORT
+			if (waitForFire) {
+#endif
+				UART_PUTS_P(UART_STR_PROMPT);
+				uartcmd_clear_buffer();
+				longjmp(newmode_jmpbuf, new_mode);
+#ifdef JOYSTICK_SUPPORT
+			} else {
+				UART_PUTS_P(UART_STR_GAMEMO_ERR);
+			}
+#endif
+		} else {
+			UART_PUTS_P(UART_STR_MODE_ERR);
+		}
+	} else {
+		uartcmd_print_mode();
+	}
+}
+
+
+#if defined(ANIMATION_TESTS) && defined(JOYSTICK_SUPPORT)
+/**
+ * Prints current joystick status via UART.
+ */
+static void uartcmd_joy_test(uint8_t *last) {
+	uint8_t joy_value = 0;
+	if (JOYISUP) {
+		joy_value |= UARTCMD_JOY_UP;
+	}
+	if (JOYISDOWN) {
+		joy_value |= UARTCMD_JOY_DOWN;
+	}
+	if (JOYISLEFT) {
+		joy_value |= UARTCMD_JOY_LEFT;
+	}
+	if (JOYISRIGHT) {
+		joy_value |= UARTCMD_JOY_RIGHT;
+	}
+	if (JOYISFIRE) {
+		joy_value |= UARTCMD_JOY_FIRE;
+	}
+
+	if (joy_value != *last) {
+		UART_PUTS_P(UART_STR_CLEARLINE);
+		if (joy_value & UARTCMD_JOY_UP) {
+			UART_PUTS_P(UART_STR_TEST_UP);
+		}
+		if (joy_value & UARTCMD_JOY_DOWN) {
+			UART_PUTS_P(UART_STR_TEST_DOWN);
+		}
+		if (joy_value & UARTCMD_JOY_LEFT) {
+			UART_PUTS_P(UART_STR_TEST_LEFT);
+		}
+		if (joy_value & UARTCMD_JOY_RIGHT) {
+			UART_PUTS_P(UART_STR_TEST_RIGHT);
+		}
+		if (joy_value & UARTCMD_JOY_FIRE) {
+			UART_PUTS_P(UART_STR_TEST_FIRE);
+		}
+		*last = joy_value;
+	}
+}
+#endif
+
+
+/**
+ * Draws test patterns for display inspection.
+ */
+static void uartcmd_test(void) {
+#ifdef ANIMATION_TESTS
+#	ifdef JOYSTICK_SUPPORT
+	if (waitForFire) {
+		waitForFire = 0;
+#	endif
+		uartcmd_forbid();
+		int pattern_no = uartcmd_extract_num_arg(&g_rx_buffer[4]);
+		if (pattern_no >= 0 && pattern_no <= NUMPLANE + 2) {
+			UART_PUTS_P(UART_STR_TEST_EXIT);
+			if (pattern_no <= NUMPLANE) {
+				test_level(pattern_no, true);
+			} else if (pattern_no == (NUMPLANE + 1)) {
+				test_palette(true);
+			} else if (pattern_no == (NUMPLANE + 2)) {
+				test_palette2(true);
+			}
+#	ifdef JOYSTICK_SUPPORT
+			uint8_t last_joy_value = 0;
+#	endif
+			while (UART_GETC() >= 0x20){ // wait for any control character
+#	ifdef JOYSTICK_SUPPORT
+				uartcmd_joy_test(&last_joy_value);
+				wait(20);
+#	endif
+			}
+		} else {
+			char msg[36] = "";
+			snprintf_P(msg, sizeof(msg), UART_STR_TEST_ERR, NUMPLANE + 2);
+			UART_PUTS(msg);
+		}
+		uartcmd_permit();
+#	ifdef JOYSTICK_SUPPORT
+		waitForFire = 1;
+	} else {
+		UART_PUTS_P(UART_STR_GAMETS_ERR);
+	}
+#	endif
+#else
+	UART_PUTS_P(UART_STR_NOTIMPL);
+#endif
+}
+
+
+/**
+ * Perform a MCU reset by triggering the watchdog.
+ */
+static void uartcmd_reset_borg(void) {
+	timer0_off();
+}
+
+
+/**
+ * Appends new characters the buffer until a line break is entered.
+ * @return true if a line break was entered, false otherwise.
+ */
+static bool uartcmd_read_until_enter(void) {
+	static char last_line_break = '\n';
+
+	while (g_rx_index < (UART_BUFFER_SIZE - 1)) {
+		int uart_result = uart_getc();
+
+		if (uart_result < 0x100u) {
+			switch ((char)uart_result) {
+			case '\n': // line feed
+			case '\r': // carriage return
+				if ((g_rx_index > 0) || (uart_result == last_line_break)) {
+					UART_PUTS(CR);
+					g_rx_buffer[g_rx_index++] = 0;
+					last_line_break = uart_result;
+					return true;
+				}
+				break;
+			case '\b':   // BS
+			case '\177': // DEL
+				if (g_rx_index != 0) {
+					g_rx_buffer[--g_rx_index] = 0;
+					UART_PUTS_P(UART_STR_BACKSPACE);
+				}
+				break;
+			case '\f': // Form Feed (Ctrl-L), reprints the line buffer
+				UART_PUTS_P(UART_STR_CLEARLINE); // clear current line
+				UART_PUTS_P(UART_STR_PROMPT);    // output prompt
+				g_rx_buffer[g_rx_index] = 0;     // terminate input buffer
+				UART_PUTS(g_rx_buffer);          // finally reprint it
+				break;
+			case 21: // NAK (Ctrl-U), clears the line buffer
+				UART_PUTS_P(UART_STR_CLEARLINE); // clear current line
+				UART_PUTS_P(UART_STR_PROMPT);    // output prompt
+				uartcmd_clear_buffer();          // clear buffer
+				break;
+			case 27: // ignore Esc
+				break;
+			default:
+				// We don't accept control characters which are not handled
+				// above. We also limit the input to 7 bit ASCII.
+				if ((uart_result < 0x20) || (uart_result > 0x7f)) {
+					UART_PUTC('\a'); // complain via ASCII bell
+				} else {
+					g_rx_buffer[g_rx_index++] = uart_result; // accept input
+					UART_PUTC(uart_result); // echo input back to terminal
+				}
+				break;
+			}
+		} else if ((uart_result & 0xFF00u) != UART_NO_DATA) {
+			uartcmd_clear_buffer();
+			UART_PUTS_P(UART_STR_UART_ERR);
+			UART_PUTS_P(UART_STR_PROMPT);
+			break;
+		} else {
+			break;
+		}
+	}
+
+	if (g_rx_index >= (UART_BUFFER_SIZE - 1)) {
+		uartcmd_clear_buffer();
+		UART_PUTS_P(UART_STR_TOOLONG);
+		UART_PUTS_P(UART_STR_PROMPT);
+	}
+	return false;
+}
+
+
+/**
+ * Checks for entered commands and dispatches them to the appropriate handler.
+ */
+void uartcmd_process(void) {
+	if (uartcmd_processing_allowed() && uartcmd_read_until_enter()) {
+		if (!strncmp_P(g_rx_buffer, UART_CMD_ERASE, UART_BUFFER_SIZE)) {
+			uartcmd_erase_eeprom();
+		} else if (!strncmp_P(g_rx_buffer, UART_CMD_HELP, UART_BUFFER_SIZE)) {
+			UART_PUTS_P(UART_STR_HELP);
+		} else if (!strncmp_P(g_rx_buffer, UART_CMD_MODE, 4)) {
+			uartcmd_mode();
+		} else if (!strncmp_P(g_rx_buffer, UART_CMD_MSG, 4)) {
+			uartcmd_simple_message();
+		} else if (!strncmp_P(g_rx_buffer, UART_CMD_NEXT, UART_BUFFER_SIZE)) {
+			uartcmd_next_anim();
+		} else if (!strncmp_P(g_rx_buffer, UART_CMD_PREV, UART_BUFFER_SIZE)) {
+			uartcmd_prev_anim();
+		} else if (!strncmp_P(g_rx_buffer, UART_CMD_RESET, UART_BUFFER_SIZE)) {
+			uartcmd_reset_borg();
+		} else if (!strncmp_P(g_rx_buffer, UART_CMD_SCROLL, 7)) {
+			uartcmd_scroll_message();
+		} else if (!strncmp_P(g_rx_buffer, UART_CMD_TEST, 4)) {
+			uartcmd_test();
+		} else if (g_rx_buffer[0] != 0) {
+			UART_PUTS_P(UART_STR_UNKNOWN);
+		}
+		UART_PUTS_P(UART_STR_PROMPT);
+		uartcmd_clear_buffer();
+	}
+}

src/uart/uart_commands.h

@@ -0,0 +1,38 @@
+/*
+ * uart_commands.h
+ *
+ *  Created on: 16.08.2014
+ *      Author: chris
+ */
+
+#ifndef UART_COMMANDS_H_
+#define UART_COMMANDS_H_
+
+#include <stdbool.h>
+#include <avr/interrupt.h>
+
+extern bool g_uartcmd_permit_processing;
+
+/**
+ * Enables UART command processing.
+ */
+inline static void uartcmd_permit(void) {
+	cli();
+	g_uartcmd_permit_processing = true;
+	sei();
+}
+
+
+/**
+ * Disables UART command processing.
+ */
+inline static void uartcmd_forbid(void) {
+	cli();
+	g_uartcmd_permit_processing = false;
+	sei();
+}
+
+
+void uartcmd_process(void);
+
+#endif /* UART_COMMANDS_H_ */

src/util.c

@@ -19,6 +19,9 @@ extern jmp_buf newmode_jmpbuf;
 #  include "can/borg_can.h"
 #endif
 
+#ifdef UART_SUPPORT
+#  include "uart/uart_commands.h"
+#endif
 
 void wait(int ms){
 /* Always use Timer1 except for the Arduino/LoL Shield platform. */
@@ -41,6 +44,10 @@ void wait(int ms){
 		bcan_process_messages();
 #endif
 
+#ifdef UART_SUPPORT
+		uartcmd_process();
+#endif
+
 #ifdef RFM12_SUPPORT
 		borg_rfm12_tick();
 #endif
@@ -50,7 +57,7 @@ void wait(int ms){
 			//PORTJOYGND &= ~(1<<BITJOY0);
 			//PORTJOYGND &= ~(1<<BITJOY1);
 			if (JOYISFIRE) {
-				longjmp(newmode_jmpbuf, 43);
+				longjmp(newmode_jmpbuf, 0xFEu);
 			}
 		}
 #endif