working 16ch RGB version
This commit is contained in:
commit
c9f2f64636
6
.gitignore
vendored
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6
.gitignore
vendored
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*.o
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*.elf
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*.bin
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*.hex
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*.lst
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*.map
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52
Makefile
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52
Makefile
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PRG = 16ch_pwm
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OBJ = main.o
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MCU_TARGET = atmega16
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OPTIMIZE = -O2
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DEFS =
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LIBS =
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# You should not have to change anything below here.
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CC = avr-gcc
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# Override is only needed by avr-lib build system.
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override CFLAGS = -g -Wall $(OPTIMIZE) -mmcu=$(MCU_TARGET) $(DEFS)
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override LDFLAGS = -Wl,-Map,$(PRG).map
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OBJCOPY = avr-objcopy
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OBJDUMP = avr-objdump
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SIZE = avr-size
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all: $(PRG).elf lst text
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$(SIZE) -x -A $(PRG).elf
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$(PRG).elf: $(OBJ)
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$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $^ $(LIBS)
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clean:
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rm -rf *.o *.lst *.map $(PRG).elf *.hex *.bin
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lst: $(PRG).lst
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%.lst: %.elf
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$(OBJDUMP) -h -S $< > $@
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# Rules for building the .text rom images
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text: hex bin
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hex: $(PRG).hex
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bin: $(PRG).bin
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%.hex: %.elf
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$(OBJCOPY) -j .text -j .data -O ihex $< $@
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%.bin: %.elf
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$(OBJCOPY) -j .text -j .data -O binary $< $@
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install: text
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# uisp -dprog=stk200 --erase --upload if=$(PRG).hex --verify
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# avrdude -p m16 -c butterfly -b 19200 -P /dev/ttyUSB0 -U flash:w:$(PRG).hex
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avrdude -p m16 -c dragon_isp -P usb -U flash:w:$(PRG).hex
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236
main.c
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236
main.c
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/***************************************************************************
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* C based avr910 / avr109 ISP Adapter *
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* *
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* Copyright (C) 2006 - 20011 by Olaf Rempel *
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* razzor AT kopf MINUS tisch DOT de *
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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; version 2 of the License, *
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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 *
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* Free Software Foundation, Inc., *
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
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***************************************************************************/
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#include <avr/io.h>
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#include <avr/interrupt.h>
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#include <stdio.h>
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/*
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* using ATmega16 @7.3728MHz:
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* Fuse H: 0xDA (512 words bootloader, jtag disabled)
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* Fuse L: 0xFF (ext. Crystal)
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*/
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#define F_CPU 7372800
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#include <util/delay.h>
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#define BAUDRATE 9600
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#define UART_CALC_BAUDRATE(baudRate) (((uint32_t)F_CPU) / (((uint32_t)baudRate)*16) -1)
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#if 0
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static int uart_putchar(char c, FILE *stream)
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{
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if (c == '\n')
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uart_putchar('\r', stream);
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loop_until_bit_is_set(UCSRA, UDRE);
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UDR = c;
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return 0;
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}
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static FILE uart = FDEV_SETUP_STREAM(uart_putchar, NULL, _FDEV_SETUP_WRITE);
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#endif
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static uint8_t valueR[16] = {
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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// 0x00, 0x02, 0x04, 0x06, 0x08, 0x0A, 0x0C, 0x0E,
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// 0x01, 0x03, 0x05, 0x07, 0x09, 0x0B, 0x0D, 0x0F,
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};
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static uint8_t valueG[16] = {
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0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
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0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
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// 0x40, 0x50, 0x60, 0x70, 0x80, 0x90, 0xA0, 0xB0,
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// 0x48, 0x58, 0x68, 0x78, 0x88, 0x98, 0xA8, 0xB8,
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};
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static uint8_t valueB[16] = {
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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// 0xF1, 0xF3, 0xF5, 0xF7, 0xF9, 0xFB, 0xFD, 0xFF,
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// 0xF0, 0xF2, 0xF4, 0xF6, 0xF8, 0xFA, 0xFC, 0xFE,
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};
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static uint8_t *current_comp_reg;
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static uint8_t comp_regR[16];
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static uint8_t comp_regG[16];
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static uint8_t comp_regB[16];
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static uint16_t *current_port_reg;
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static uint16_t port_regR[16 +1];
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static uint16_t port_regG[16 +1];
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static uint16_t port_regB[16 +1];
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static uint8_t current_color;
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ISR(SIG_OVERFLOW0)
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{
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#if 0
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/* switch color */
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switch (current_color) {
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case 0: /* RED */
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current_comp_reg = comp_regR;
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current_port_reg = port_regR;
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current_color = 1;
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break;
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case 1: /* GREEN */
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current_comp_reg = comp_regG;
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current_port_reg = port_regG;
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current_color = 2;
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break;
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case 2: /* BLUE */
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current_comp_reg = comp_regB;
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current_port_reg = port_regB;
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current_color = 0;
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break;
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}
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#else
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current_comp_reg = comp_regR;
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current_port_reg = port_regR;
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#endif
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uint16_t port_reg = *current_port_reg++;
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PORTA = (port_reg & 0xFF);
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PORTC = (port_reg >> 8) & 0xFF;
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/* enable compare interrupts if any pin is active */
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if (port_reg != 0x0000) {
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TIMSK |= (1<<OCIE0);
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}
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OCR0 = *current_comp_reg++;
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}
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ISR(SIG_OUTPUT_COMPARE0)
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{
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uint16_t port_reg = *current_port_reg++;
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PORTA = (port_reg & 0xFF);
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PORTC = (port_reg >> 8) & 0xFF;
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/* no further compare interrupts needed */
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if (port_reg == 0x0000) {
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TIMSK &= ~(1<<OCIE0);
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}
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OCR0 = *current_comp_reg++;
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}
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static void calculate_timer_values(uint8_t *value, uint8_t *comp_reg, uint16_t *port_reg)
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{
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uint8_t index = 0;
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uint16_t chan_used = 0xFFFF;
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uint16_t chan_init = 0xFFFF;
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/* loop until all channels are calculated */
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while (chan_used) {
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uint8_t i;
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uint8_t min_value = 0xFF;
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uint16_t chan_tmp = chan_used;
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uint16_t chan_mask = 0x0001;
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for (i = 0; i < 16; i++) {
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/* skip if channel already used */
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if (chan_used & chan_mask)
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{
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/* channel is not used (value 0x00) */
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if (value[i] == 0x00) {
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chan_init &= (~chan_mask);
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chan_used &= (~chan_mask);
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/* found a new lower value */
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} else if (value[i] < min_value) {
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min_value = value[i];
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chan_tmp = chan_used & (~chan_mask);
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/* found another value with the same value */
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} else if (value[i] == min_value) {
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chan_tmp &= (~chan_mask);
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}
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}
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chan_mask <<= 1;
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}
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chan_used &= chan_tmp;
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// TODO: what if all channels are 0xFF, old value?
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if (min_value < 0xFF) {
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comp_reg[index] = min_value -1;
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port_reg[index +1] = chan_used;
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}
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index++;
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}
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while (index < 16) {
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comp_reg[index] = 0x00;
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port_reg[index +1] = chan_used;
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index++;
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}
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port_reg[0] = chan_init;
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}
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int main(void)
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{
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/* 16 PWM Outputs */
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PORTA = 0x00;
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PORTC = 0x00;
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DDRA = 0xFF;
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DDRC = 0xFF;
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/* timer0, FCPU/256, overflow interrupt */
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TCCR0 = (1<<CS02);
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TIMSK = (1<<TOIE0);
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TCNT0 = 0x00;
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/* Set baud rate */
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UBRRH = (UART_CALC_BAUDRATE(BAUDRATE)>>8) & 0xFF;
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UBRRL = (UART_CALC_BAUDRATE(BAUDRATE) & 0xFF);
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/* enable usart with 8n1 */
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UCSRB = (1<<TXEN) | (1<<RXEN);
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UCSRC = (1<<URSEL) | (1<<UCSZ1) | (1<<UCSZ0);
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// fprintf(&uart, "good morning dave\n");
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PORTA = 0x01;
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calculate_timer_values(valueR, comp_regR, port_regR);
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PORTA = 0x02;
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calculate_timer_values(valueG, comp_regG, port_regG);
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PORTA = 0x04;
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calculate_timer_values(valueB, comp_regB, port_regB);
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PORTA = 0x00;
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sei();
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while (1);
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return 0;
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}
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