120 lines
2.2 KiB
C
120 lines
2.2 KiB
C
#include <avr/interrupt.h>
|
|
#include <avr/io.h>
|
|
|
|
#undef WATCHDOG_ENABLED
|
|
#ifdef WATCHDOG_ENABLED
|
|
# include <avr/wdt.h>
|
|
#endif
|
|
|
|
#include "../config.h"
|
|
#include "../makros.h"
|
|
#include "borg_hw.h"
|
|
|
|
// define row port
|
|
#ifndef ROWPORT
|
|
# define ROWPORT PORTA
|
|
#endif
|
|
#define ROWDDR DDR(ROWPORT)
|
|
|
|
// define column port
|
|
#ifndef COLPORT
|
|
# define COLPORT PORTC
|
|
#endif
|
|
#define COLDDR DDR(COLPORT)
|
|
|
|
|
|
// buffer which holds the currently shown frame
|
|
unsigned char pixmap[NUMPLANE][NUM_ROWS][LINEBYTES];
|
|
|
|
|
|
ISR(TIMER0_COMP_vect)
|
|
{
|
|
static unsigned char plane = 0;
|
|
static unsigned char row = 0;
|
|
|
|
#ifdef WATCHDOG_ENABLED
|
|
// reset watchdog
|
|
wdt_reset();
|
|
#endif
|
|
|
|
ROWPORT = 0;
|
|
row++;
|
|
if ((COLPORT <<= 1) == 0) {
|
|
row = 0;
|
|
COLPORT = 1;
|
|
|
|
if (++plane == NUMPLANE)
|
|
{
|
|
plane = 0;
|
|
}
|
|
}
|
|
|
|
for (unsigned char x = 0; x < 10; x++) {
|
|
asm volatile ("nop");
|
|
}
|
|
|
|
ROWPORT = pixmap[plane][row][0];
|
|
}
|
|
|
|
void timer0_off(){
|
|
cli();
|
|
|
|
COLPORT = 0;
|
|
ROWPORT = 0;
|
|
|
|
#if defined (__AVR_ATmega644P__) || defined (__AVR_ATmega644__) || (__AVR_ATmega1284P__) || defined (__AVR_ATmega1284__)
|
|
TCCR0A = 0x00;
|
|
TCCR0B = 0x00;
|
|
TIMSK0 = 0;
|
|
#else
|
|
TCCR0 = 0x00;
|
|
TIMSK = 0;
|
|
#endif
|
|
|
|
sei();
|
|
}
|
|
|
|
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 = 0x03; // clk/64
|
|
TCNT0 = 0x00; // reset timer
|
|
OCR0 = 0x0A; // compare with this value
|
|
TIMSK0 = 0x02; // compare match Interrupt on
|
|
#else
|
|
TCCR0 = 0x0B; // CTC Mode, clk/64
|
|
TCNT0 = 0x00; // reset timer
|
|
OCR0 = 0x0A; // compare with this value
|
|
TIMSK = 0x02; // compare match Interrupt on
|
|
#endif
|
|
}
|
|
|
|
void borg_hw_init(){
|
|
// switch all pins of both the row and the column port to output mode
|
|
ROWDDR = 0xFF;
|
|
COLDDR = 0xFF;
|
|
|
|
// switch off all rows and columns for now
|
|
COLPORT = 0;
|
|
ROWPORT = 0;
|
|
|
|
timer0_on();
|
|
|
|
#ifdef WATCHDOG_ENABLED
|
|
// activate watchdog timer
|
|
wdt_reset();
|
|
wdt_enable(0x00); // 17ms watchdog
|
|
#endif
|
|
}
|