323 lines
13 KiB
C
323 lines
13 KiB
C
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/**
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* @file borg_hw_lolshield.c
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* @brief Driver for Jimmie Rodgers' LoL Shield
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* @author Christian Kroll
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* @author Jimmie Rodgers
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* @date 2014
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* @copyright GNU Public License 2 or later
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* @see http://jimmieprodgers.com/kits/lolshield/
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*
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* This driver is partly based on Jimmie Rodger's LoL Shield Library which
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* is available at https://code.google.com/p/lolshield/ (parts of the file
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* "Charliplexing.cpp" have been incorporated into this file).
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include "../config.h"
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#include "../makros.h"
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#include <stdint.h>
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#include <avr/interrupt.h>
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#include <avr/io.h>
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#include <avr/wdt.h>
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#include <avr/pgmspace.h>
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#include "borg_hw.h"
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// buffer which holds the currently shown frame
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unsigned char pixmap[NUMPLANE][NUM_ROWS][LINEBYTES];
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#define FRAMERATE 80UL
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#define CUTOFF(scaler) ((128 * 12 - 6) * FRAMERATE * scaler)
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// BEWARE: only the Diavolino Kit is supported at the moment
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// other platforms don't work, yet
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const uint8_t
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#if defined (__AVR_ATmega168__) || defined (__AVR_ATmega48__) || defined (__AVR_ATmega88__) || defined (__AVR_ATmega328P__) || defined (__AVR_ATmega1280__) || defined (__AVR_ATmega2560__) || defined (__AVR_ATmega8__)
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# if F_CPU < CUTOFF(8)
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fastPrescaler = _BV(CS20), // 1
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slowPrescaler = _BV(CS21); // 8
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# define SLOWSCALERSHIFT 3
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# define FASTSCALERSHIFT 3
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# elif F_CPU < CUTOFF(32)
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fastPrescaler = _BV(CS21), // 8
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slowPrescaler = _BV(CS21) | _BV(CS20); // 32
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# define SLOWSCALERSHIFT 5
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# define FASTSCALERSHIFT 2
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# elif F_CPU < CUTOFF(64)
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fastPrescaler = _BV(CS21), // 8
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slowPrescaler = _BV(CS22); // 64
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# define SLOWSCALERSHIFT 6
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# define FASTSCALERSHIFT 3
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# elif F_CPU < CUTOFF(128)
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fastPrescaler = _BV(CS21) | _BV(CS20), // 32
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slowPrescaler = _BV(CS22) | _BV(CS20); // 128
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# define SLOWSCALERSHIFT 7
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# define FASTSCALERSHIFT 2
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# elif F_CPU < CUTOFF(256)
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fastPrescaler = _BV(CS21) | _BV(CS20), // 32
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slowPrescaler = _BV(CS22) | _BV(CS21); // 256
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# define SLOWSCALERSHIFT 8
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# define FASTSCALERSHIFT 3
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# elif F_CPU < CUTOFF(1024)
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fastPrescaler = _BV(CS22) | _BV(CS20), // 128
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slowPrescaler = _BV(CS22) | _BV(CS21) | _BV(CS20); // 1024
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# define SLOWSCALERSHIFT 10
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# define FASTSCALERSHIFT 3
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# else
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# error frame rate is too low
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# endif
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#else
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# error no support for this chip
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#endif
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ISR(TIMER2_OVF_vect) {
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// For each cycle, we have potential planes to display. Once every plane has
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// been displayed, then we move on to the next cycle.
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// NOTE: a "cycle" means a subset of LEDs
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// 12 Cycles of Matrix
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static uint8_t cycle = 0;
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// planes to display
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// NOTE: a "plane" in the Borgware is the same as a "page" in Jimmie's lib
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static uint8_t plane = 0;
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// pointer to corresponding bitmap
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uint8_t *p = &pixmap[plane][0][0];
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// tune timer values (fiddle around with them to adjust brightness)
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static uint8_t const prescaler[NUMPLANE + 1] = {3, 3, 3, 6};
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TCCR2B = prescaler[plane];
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static uint8_t const counts[NUMPLANE + 1] = {241, 198, 148, 255};
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TCNT2 = counts[plane];
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// Set sink pin to Vcc/source, turning off current.
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static uint8_t sink_b, sink_d = 0;
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PIND = sink_d;
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PINB = sink_b;
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// Set pins to input mode; Vcc/source become pullups.
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DDRD = 0;
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DDRB = 0;
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static uint8_t const sink_d_cycle[] =
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{0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
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static uint8_t const sink_b_cycle[] =
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{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20};
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uint8_t pins_d = sink_d = sink_d_cycle[cycle];
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uint8_t pins_b = sink_b = sink_b_cycle[cycle];
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// convert Borgware-2D framebuffer to LoL Shield cycles
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// (I could have done this with a lookup table, but that would be slower as
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// non-constant bit shifts are quite expensive on AVR)
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if (plane < NUMPLANE) {
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switch(cycle) {
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case 0:
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pins_b |= (0x02u & p[ 0]) << 4; // x=12, y= 0, high=13
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pins_b |= (0x02u & p[ 2]) << 3; // x=12, y= 1, high=12
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pins_b |= (0x02u & p[ 4]) << 2; // x=12, y= 2, high=11
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pins_b |= (0x02u & p[ 6]) << 1; // x=12, y= 3, high=10
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pins_b |= (0x02u & p[ 8]); // x=12, y= 4, high= 9
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pins_b |= (0x02u & p[10]) >> 1; // x=12, y= 5, high= 8
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pins_d |= (0x02u & p[12]) << 6; // x=12, y= 6, high= 7
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pins_d |= (0x02u & p[14]) << 5; // x=12, y= 7, high= 6
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pins_d |= (0x02u & p[16]) << 4; // x=12, y= 8, high= 5
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break;
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case 1:
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pins_b |= (0x08u & p[ 0]) << 2; // x=10, y= 0, high=13
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pins_b |= (0x08u & p[ 2]) << 1; // x=10, y= 1, high=12
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pins_b |= (0x08u & p[ 4]); // x=10, y= 2, high=11
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pins_b |= (0x08u & p[ 6]) >> 1; // x=10, y= 3, high=10
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pins_b |= (0x08u & p[ 8]) >> 2; // x=10, y= 4, high= 9
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pins_b |= (0x08u & p[10]) >> 3; // x=10, y= 5, high= 8
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pins_d |= (0x08u & p[12]) << 4; // x=10, y= 6, high= 7
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pins_d |= (0x08u & p[14]) << 3; // x=10, y= 7, high= 6
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pins_d |= (0x08u & p[16]) << 2; // x=10, y= 8, high= 5
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break;
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case 2:
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pins_b |= (0x20u & p[ 0]); // x= 8, y= 0, high=13
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pins_b |= (0x20u & p[ 2]) >> 1; // x= 8, y= 1, high=12
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pins_b |= (0x20u & p[ 4]) >> 2; // x= 8, y= 2, high=11
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pins_b |= (0x20u & p[ 6]) >> 3; // x= 8, y= 3, high=10
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pins_b |= (0x20u & p[ 8]) >> 4; // x= 8, y= 4, high= 9
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pins_b |= (0x20u & p[10]) >> 5; // x= 8, y= 5, high= 8
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pins_d |= (0x20u & p[12]) << 2; // x= 8, y= 6, high= 7
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pins_d |= (0x20u & p[14]) << 1; // x= 8, y= 7, high= 6
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pins_d |= (0x20u & p[16]); // x= 8, y= 8, high= 5
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break;
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case 3:
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pins_b |= (0x20u & p[ 1]); // x= 0, y= 0, high=13
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pins_b |= (0x20u & p[ 3]) >> 1; // x= 0, y= 1, high=12
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pins_b |= (0x20u & p[ 5]) >> 2; // x= 0, y= 2, high=11
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pins_b |= (0x20u & p[ 7]) >> 3; // x= 0, y= 3, high=10
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pins_b |= (0x20u & p[ 9]) >> 4; // x= 0, y= 4, high= 9
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pins_b |= (0x20u & p[11]) >> 5; // x= 0, y= 5, high= 8
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pins_d |= (0x01u & p[16]) << 2; // x=13, y= 8, high= 2
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pins_d |= (0x04u & p[16]) << 1; // x=11, y= 8, high= 3
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pins_d |= (0x10u & p[16]); // x= 9, y= 8, high= 4
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pins_d |= (0x20u & p[13]) << 2; // x= 0, y= 6, high= 7
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pins_d |= (0x20u & p[15]) << 1; // x= 0, y= 7, high= 6
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break;
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case 4:
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pins_b |= (0x10u & p[ 1]) << 1; // x= 1, y= 0, high=13
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pins_b |= (0x10u & p[ 3]); // x= 1, y= 1, high=12
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pins_b |= (0x10u & p[ 5]) >> 1; // x= 1, y= 2, high=11
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pins_b |= (0x10u & p[ 7]) >> 2; // x= 1, y= 3, high=10
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pins_b |= (0x10u & p[ 9]) >> 3; // x= 1, y= 4, high= 9
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pins_b |= (0x10u & p[11]) >> 4; // x= 1, y= 5, high= 8
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pins_d |= (0x01u & p[14]) << 2; // x=13, y= 7, high= 2
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pins_d |= (0x04u & p[14]) << 1; // x=11, y= 7, high= 3
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pins_d |= (0x10u & p[13]) << 3; // x= 1, y= 6, high= 7
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pins_d |= (0x10u & p[14]); // x= 9, y= 7, high= 4
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pins_d |= (0x20u & p[17]); // x= 0, y= 8, high= 5
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break;
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case 5:
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pins_b |= (0x08u & p[ 1]) << 2; // x= 2, y= 0, high=13
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pins_b |= (0x08u & p[ 3]) << 1; // x= 2, y= 1, high=12
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pins_b |= (0x08u & p[ 5]); // x= 2, y= 2, high=11
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pins_b |= (0x08u & p[ 7]) >> 1; // x= 2, y= 3, high=10
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pins_b |= (0x08u & p[ 9]) >> 2; // x= 2, y= 4, high= 9
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pins_b |= (0x08u & p[11]) >> 3; // x= 2, y= 5, high= 8
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pins_d |= (0x01u & p[12]) << 2; // x=13, y= 6, high= 2
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pins_d |= (0x04u & p[12]) << 1; // x=11, y= 6, high= 3
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pins_d |= (0x10u & p[12]); // x= 9, y= 6, high= 4
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pins_d |= (0x10u & p[15]) << 2; // x= 1, y= 7, high= 6
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pins_d |= (0x10u & p[17]) << 1; // x= 1, y= 8, high= 5
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break;
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case 6:
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pins_b |= (0x04u & p[ 1]) << 3; // x= 3, y= 0, high=13
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pins_b |= (0x04u & p[ 3]) << 2; // x= 3, y= 1, high=12
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pins_b |= (0x04u & p[ 5]) << 1; // x= 3, y= 2, high=11
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pins_b |= (0x04u & p[ 7]); // x= 3, y= 3, high=10
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pins_b |= (0x04u & p[ 9]) >> 1; // x= 3, y= 4, high= 9
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pins_d |= (0x01u & p[10]) << 2; // x=13, y= 5, high= 2
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pins_d |= (0x04u & p[10]) << 1; // x=11, y= 5, high= 3
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pins_d |= (0x08u & p[13]) << 4; // x= 2, y= 6, high= 7
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pins_d |= (0x08u & p[15]) << 3; // x= 2, y= 7, high= 6
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pins_d |= (0x08u & p[17]) << 2; // x= 2, y= 8, high= 5
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pins_d |= (0x10u & p[10]); // x= 9, y= 5, high= 4
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break;
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case 7:
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pins_b |= (0x02u & p[ 1]) << 4; // x= 4, y= 0, high=13
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pins_b |= (0x02u & p[ 3]) << 3; // x= 4, y= 1, high=12
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pins_b |= (0x02u & p[ 5]) << 2; // x= 4, y= 2, high=11
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pins_b |= (0x02u & p[ 7]) << 1; // x= 4, y= 3, high=10
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pins_b |= (0x04u & p[11]) >> 2; // x= 3, y= 5, high= 8
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pins_d |= (0x01u & p[ 8]) << 2; // x=13, y= 4, high= 2
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pins_d |= (0x04u & p[ 8]) << 1; // x=11, y= 4, high= 3
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pins_d |= (0x04u & p[13]) << 5; // x= 3, y= 6, high= 7
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pins_d |= (0x04u & p[15]) << 4; // x= 3, y= 7, high= 6
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pins_d |= (0x04u & p[17]) << 3; // x= 3, y= 8, high= 5
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pins_d |= (0x10u & p[ 8]); // x= 9, y= 4, high= 4
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break;
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case 8:
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pins_b |= (0x01u & p[ 1]) << 5; // x= 5, y= 0, high=13
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pins_b |= (0x01u & p[ 3]) << 4; // x= 5, y= 1, high=12
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pins_b |= (0x01u & p[ 5]) << 3; // x= 5, y= 2, high=11
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pins_b |= (0x02u & p[ 9]); // x= 4, y= 4, high= 9
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pins_b |= (0x02u & p[11]) >> 1; // x= 4, y= 5, high= 8
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pins_d |= (0x01u & p[ 6]) << 2; // x=13, y= 3, high= 2
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pins_d |= (0x02u & p[13]) << 6; // x= 4, y= 6, high= 7
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pins_d |= (0x02u & p[15]) << 5; // x= 4, y= 7, high= 6
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pins_d |= (0x02u & p[17]) << 4; // x= 4, y= 8, high= 5
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pins_d |= (0x04u & p[ 6]) << 1; // x=11, y= 3, high= 3
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pins_d |= (0x10u & p[ 6]); // x= 9, y= 3, high= 4
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break;
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case 9:
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pins_b |= (0x01u & p[ 7]) << 2; // x= 5, y= 3, high=10
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pins_b |= (0x01u & p[ 9]) << 1; // x= 5, y= 4, high= 9
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pins_b |= (0x01u & p[11]); // x= 5, y= 5, high= 8
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pins_b |= (0x80u & p[ 0]) >> 2; // x= 6, y= 0, high=13
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pins_b |= (0x80u & p[ 2]) >> 3; // x= 6, y= 1, high=12
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pins_d |= (0x01u & p[ 4]) << 2; // x=13, y= 2, high= 2
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pins_d |= (0x01u & p[13]) << 7; // x= 5, y= 6, high= 7
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pins_d |= (0x01u & p[15]) << 6; // x= 5, y= 7, high= 6
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pins_d |= (0x01u & p[17]) << 5; // x= 5, y= 8, high= 5
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pins_d |= (0x04u & p[ 4]) << 1; // x=11, y= 2, high= 3
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pins_d |= (0x10u & p[ 4]); // x= 9, y= 2, high= 4
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break;
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case 10:
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pins_b |= (0x40u & p[ 0]) >> 1; // x= 7, y= 0, high=13
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pins_b |= (0x80u & p[ 4]) >> 4; // x= 6, y= 2, high=11
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pins_b |= (0x80u & p[ 6]) >> 5; // x= 6, y= 3, high=10
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pins_b |= (0x80u & p[ 8]) >> 6; // x= 6, y= 4, high= 9
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pins_b |= (0x80u & p[10]) >> 7; // x= 6, y= 5, high= 8
|
||
|
|
pins_d |= (0x01u & p[ 2]) << 2; // x=13, y= 1, high= 2
|
||
|
|
pins_d |= (0x04u & p[ 2]) << 1; // x=11, y= 1, high= 3
|
||
|
|
pins_d |= (0x10u & p[ 2]); // x= 9, y= 1, high= 4
|
||
|
|
pins_d |= (0x80u & p[12]); // x= 6, y= 6, high= 7
|
||
|
|
pins_d |= (0x80u & p[14]) >> 1; // x= 6, y= 7, high= 6
|
||
|
|
pins_d |= (0x80u & p[16]) >> 2; // x= 6, y= 8, high= 5
|
||
|
|
break;
|
||
|
|
case 11:
|
||
|
|
pins_b |= (0x40u & p[ 2]) >> 2; // x= 7, y= 1, high=12
|
||
|
|
pins_b |= (0x40u & p[ 4]) >> 3; // x= 7, y= 2, high=11
|
||
|
|
pins_b |= (0x40u & p[ 6]) >> 4; // x= 7, y= 3, high=10
|
||
|
|
pins_b |= (0x40u & p[ 8]) >> 5; // x= 7, y= 4, high= 9
|
||
|
|
pins_b |= (0x40u & p[10]) >> 6; // x= 7, y= 5, high= 8
|
||
|
|
pins_d |= (0x01u & p[ 0]) << 2; // x=13, y= 0, high= 2
|
||
|
|
pins_d |= (0x04u & p[ 0]) << 1; // x=11, y= 0, high= 3
|
||
|
|
pins_d |= (0x10u & p[ 0]); // x= 9, y= 0, high= 4
|
||
|
|
pins_d |= (0x40u & p[12]) << 1; // x= 7, y= 6, high= 7
|
||
|
|
pins_d |= (0x40u & p[14]); // x= 7, y= 7, high= 6
|
||
|
|
pins_d |= (0x40u & p[16]) >> 1; // x= 7, y= 8, high= 5
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Enable pullups on new output pins.
|
||
|
|
PORTD = pins_d;
|
||
|
|
PORTB = pins_b;
|
||
|
|
// Set pins to output mode; pullups become Vcc/source.
|
||
|
|
DDRD = pins_d;
|
||
|
|
DDRB = pins_b;
|
||
|
|
// Set sink pin to GND/sink, turning on current.
|
||
|
|
PIND = sink_d;
|
||
|
|
PINB = sink_b;
|
||
|
|
|
||
|
|
plane++;
|
||
|
|
|
||
|
|
if (plane >= (NUMPLANE + 1)) {
|
||
|
|
plane = 0;
|
||
|
|
cycle++;
|
||
|
|
if (cycle >= 12) {
|
||
|
|
cycle = 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
wdt_reset();
|
||
|
|
}
|
||
|
|
|
||
|
|
void borg_hw_init() {
|
||
|
|
// prepare Timer2
|
||
|
|
TIMSK2 &= ~(_BV(TOIE2) | _BV(OCIE2A));
|
||
|
|
TCCR2A &= ~(_BV(WGM21) | _BV(WGM20));
|
||
|
|
TCCR2B &= ~_BV(WGM22);
|
||
|
|
ASSR &= ~_BV(AS2);
|
||
|
|
|
||
|
|
// Then start the display
|
||
|
|
TIMSK2 |= _BV(TOIE2);
|
||
|
|
TCCR2B = fastPrescaler;
|
||
|
|
|
||
|
|
// interrupt ASAP
|
||
|
|
TCNT2 = 0xff;
|
||
|
|
|
||
|
|
// activate watchdog timer
|
||
|
|
wdt_reset();
|
||
|
|
wdt_enable(0x00); // 17ms watchdog
|
||
|
|
}
|