Save the ws2812 current progress
parent
a383e956ae
commit
e6b952a2dc
11
flake.nix
11
flake.nix
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@ -35,6 +35,7 @@
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buildInputs = [ pkgs.simavr ];
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/*
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MCU = "attiny85";
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CHIP_SELECT = "AVR_ATtiny85";
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F_CPU = "8000000";
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@ -44,6 +45,11 @@
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${avr.gcc}/bin/avr-gcc ${CFLAGS} -I${pkgs.simavr}/include/ -I${src}/base/include/ -o main.elf ${src}/ws2812/src/main.c
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$OBJCOPY -O ihex main.elf main.hex
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'';
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*/
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buildPhase = ''
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cd ws2812
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make
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'';
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installPhase = ''
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mkdir $out
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cp main.elf main.hex $out
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@ -56,6 +62,7 @@
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avr = with pkgs.pkgsCross.avr.buildPackages; [
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binutils
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gcc
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gdb
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avrdude
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simavr
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gtkwave
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@ -63,7 +70,9 @@
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in
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pkgs.mkShell {
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name = "Wearables-shell";
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buildInputs = avr;
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buildInputs = avr ++ [ pkgs.gnumake ];
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GCC = pkgs.pkgsCross.avr.buildPackages.gcc;
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SIMAVR = pkgs.pkgsCross.avr.buildPackages.simavr;
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};
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};
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}
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@ -0,0 +1,11 @@
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MCU=attiny85
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CHIP_SELECT=AVR_ATtiny85
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F_CPU=8000000
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CFLAGS=-O -finline-functions -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums -Wall -Wstrict-prototypes -DF_CPU=${F_CPU} -std=gnu99 -D__${CHIP_SELECT}__=1 -mmcu=${MCU}
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main:
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${GCC}/bin/avr-gcc ${CFLAGS} -I../base/include/ -E -o main.E src/main.c
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${GCC}/bin/avr-gcc ${CFLAGS} -I../base/include/ -S -o main.S src/main.c
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${GCC}/bin/avr-gcc ${CFLAGS} -I${SIMAVR}/include/ -I../base/include/ -o main.elf src/main.c
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${OBJCOPY} -O ihex main.elf main.hex
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@ -3,29 +3,22 @@
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#include "ws2812.h"
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#include "np_common.c"
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/*
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#include <simavr/avr/avr_mcu_section.h>
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AVR_MCU(F_CPU, "attiny85");
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const struct avr_mmcu_vcd_trace_t _mytrace[] _MMCU_ = {
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{ AVR_MCU_VCD_SYMBOL("GTCCR"), .what = (void*)>CCR, },
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// { AVR_MCU_VCD_SYMBOL("TCCR0B"), .what = (void*)&TCCR0B, },
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{ AVR_MCU_VCD_SYMBOL("TIMSK"), .what = (void*)&TIMSK, },
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{ AVR_MCU_VCD_SYMBOL("TIFR"), .what = (void*)&TIFR, },
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{ AVR_MCU_VCD_SYMBOL("OCR0A"), .what = (void*)&OCR0A, },
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{ AVR_MCU_VCD_SYMBOL("OCR0B"), .what = (void*)&OCR0B, },
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{ AVR_MCU_VCD_SYMBOL("current"), .what = (void*)¤t, },
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{ AVR_MCU_VCD_SYMBOL("idx"), .what = (void*)&idx, },
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{ AVR_MCU_VCD_SYMBOL("cnt"), .what = (void*)&cnt, },
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{ AVR_MCU_VCD_SYMBOL("val"), .what = (void*)&val, },
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// { AVR_MCU_VCD_SYMBOL("DDRB"), .what = (void*)&DDRB, },
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{ AVR_MCU_VCD_SYMBOL("DDRB"), .what = (void*)&DDRB, },
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{ AVR_MCU_VCD_SYMBOL("PORTB"), .what = (void*)&PORTB, },
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// { AVR_MCU_VCD_SYMBOL("TCNT0"), .what = (void*)&TCNT0, },
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// { AVR_MCU_VCD_SYMBOL("TCNT1"), .what = (void*)&TCNT1, },
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};
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*/
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#define PIXEL_COUNT 7
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/*
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const uint8_t pixels_0[PIXEL_COUNT * 3] =
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{ 255, 0, 255,
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255, 255, 0,
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255, 255, 255 };
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*/
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const uint8_t pixels_1[PIXEL_COUNT * 4] =
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{ 0, 0, 0, 0,
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32, 0, 0, 0,
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@ -68,19 +61,47 @@ void blink(void) {
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PORTB &= ~(_BV(2));
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}
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int main (void) {
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_delay_ms(1000);
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/*
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void fade_in(const uint8_t *pixels);
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void fade_out(void);
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void fade_in(const uint8_t *pixels) {
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uint8_t current[PIXEL_COUNT * 4];
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for (int i = 0; i < 255; i++) {
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for (int idx = 0; idx < PIXEL_COUNT * 4; idx++) {
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if (current[idx] < pixels[idx]) {
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current[idx] += 1;
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}
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}
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write_pixels(current, PIXEL_COUNT * 4);
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_delay_ms(5);
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}
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}
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void fade_out() {
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uint8_t current[PIXEL_COUNT * 4];
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for (int i = 0; i < 255; i++) {
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for (int idx = 0; idx < PIXEL_COUNT * 4; idx++) {
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if (current[idx] > 0) {
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current[idx] -= 1;
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}
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}
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write_pixels(current, PIXEL_COUNT * 4);
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_delay_ms(5);
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}
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}
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*/
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int main (void) {
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PORTB = 0;
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DDRB = _BV(0) | _BV(1) | _BV(2);
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DDRB = _BV(0) | _BV(1) | _BV(2) | _BV(3);
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_delay_ms(50);
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blink();
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np_initialize();
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sei();
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_delay_ms(500);
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/*
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while (1) {
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blink();
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write_pixels(pixels_1, PIXEL_COUNT * 4);
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@ -90,5 +111,61 @@ int main (void) {
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write_pixels(pixels_3, PIXEL_COUNT * 4);
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_delay_ms(1000);
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write_pixels(pixels_4, PIXEL_COUNT * 4);
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_delay_ms(1000);
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}
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*/
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uint8_t pixels[7 * 3];
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for (uint8_t i = 0; i < 7 * 3; i++) {
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pixels[i] = 0;
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}
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int8_t r_step = 1;
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int8_t g_step = 0;
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int8_t b_step = 0;
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while (1) {
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pixels[0] += r_step;
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pixels[3] += r_step;
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pixels[6] += r_step;
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pixels[9] += r_step;
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pixels[12] += r_step;
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pixels[15] += r_step;
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pixels[18] += r_step;
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// pixels[1] += g_step;
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// pixels[2] += b_step;
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write_pixels(pixels, 7 * 3);
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if (pixels[0] == 255) {
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r_step = -1;
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} else if (pixels[0] == 0) {
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r_step = 1;
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}
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/*
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if (pixels[0] == 255) {
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r_step = -1;
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g_step = 1;
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} else if (pixels[0] == 0 && r_step == -1) {
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r_step = 0;
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}
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*/
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/*
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if (pixels[1] == 255) {
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g_step = -1;
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b_step = 1;
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} else if (pixels[1] == 0 && g_step == -1) {
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g_step = 0;
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}
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if (pixels[2] == 255) {
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b_step = -1;
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r_step = 1;
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} else if (pixels[2] == 0 && b_step == -1) {
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b_step = 0;
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}
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*/
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_delay_ms(5);
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}
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return 0;
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}
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@ -17,67 +17,73 @@ void latch(io_pin_t *addr) {
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#define T1_HIGH 7
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#define T_FRAME 11
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volatile uint8_t bit = 0;
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volatile uint8_t val = 0;
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volatile uint32_t idx = 0;
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volatile uint8_t sub_idx = 0;
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volatile const uint8_t *data = NULL;
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volatile uint32_t cnt = 0;
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#define write_bit(label, bit) \
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"out %[port], %[hi]" "\n\t" \
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"nop" "\n\t" \
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"sbrc %[byte], " #bit "\n\t" \
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"rjmp .+0" "\n\t" \
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"out %[port], %[low]" "\n\t" \
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"rjmp .+0" "\n\t" \
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"rjmp .+0" "\n\t" \
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ISR(TIMER0_OVF_vect) {
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// If we have sent all of the bytes
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if (idx >= cnt) {
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// Turn off the clock
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TCCR0B &= ~(_BV(CS00));
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// Disconnect OC0A and OC0B
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TCCR0A &= ~(_BV(COM0A1) | _BV(COM0A0) | _BV(COM0B1) | _BV(COM0B0));
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// Write a 0 to the PORTB[1] / OC0B
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PORTB &= ~(_BV(1));
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/*
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#define write_bit(label, bit) \
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"bst %[byte], " #bit "\n\t" \
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"out %[port], %[hi]" "\n\t" \
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"nop" "\n\t" \
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"brtc " label "\n\t" \
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"rjmp .+0" "\n\t" \
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label ": " "out %[port], %[low]" "\n\t" \
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"rjmp .+0" "\n\t" \
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"rjmp .+0" "\n\t"
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*/
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// After this, the timer should be stopped and we shouldn't see any further interrupts.
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return;
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}
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// if the current bit is high, spend T1_HIGH ticks with the line asserted.
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// Otherwise, assert for T0_HIGH ticks.
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OCR0B = bit ? T1_HIGH : T0_HIGH;
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inline void write_byte(volatile uint8_t *port, uint8_t hi, uint8_t low, uint8_t byte) {
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__asm__ __volatile__ (
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write_bit("A_%=", 7)
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write_bit("B_%=", 6)
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write_bit("C_%=", 5)
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write_bit("D_%=", 4)
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write_bit("E_%=", 3)
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write_bit("F_%=", 2)
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write_bit("G_%=", 1)
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write_bit("H_%=", 0)
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: /* No outputs */
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: [port] "I" (_SFR_IO_ADDR(PORTB)),
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[hi] "r" (hi),
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[low] "r" (low),
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[byte] "r" (byte)
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);
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// Now that we have the timer set correctly, let's preload the next bit
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// If we're at the last bit for the curret byte, let's move on to the next byte
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if (sub_idx == 8) {
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sub_idx = 0;
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idx++;
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val = data[idx];
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}
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// Load the bit from the current value
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bit = val & _BV(sub_idx);
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// And then increment to the next bit for the next iteration
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sub_idx++;
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// __asm__ __volatile__ (
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/*
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"ldi r24, 8" "\n\t" // count out eight bits. One higher than normal because I do the final check *after* the counter decrements. I'm effectively 1-based
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"lsl %[byte]" "\n\t" // output data left, saving the msb in SREG (1 cycle)
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"bst sreg, 0" "\n\t" // Save hte carry flag to the transfer bit
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"L_%=: " "out %[port], %[hi]" "\n\t" // enable the port
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"brtc I_%=" "\n\t" // If we shifted out a 0, if SREG[C] is clear, immediately branch I_%= (2 cycles if true, 1 cycle if false)
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"nop" "\n\t" // We shifted out a 1, so wait just a touch longer
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"nop" "\n\t"
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"nop" "\n\t"
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"I_%=: " "out %[port], %[low]" "\n\t" // now clear the pin
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// I now have five ticks before I can re-enable the pin
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"lsl %[byte]" "\n\t" // Shift out the next bit
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"bst sreg, 0" "\n\t"
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"dec r24" "\n\t" // Decrement the bit counter
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"cpi r24, 0" "\n\t" // Is the bit counter 0?
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"brne L_%=" "\n\t" // If we haven't reached 0, we have more data to send
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*/
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}
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void write_pixels(const uint8_t *pixels, uint8_t length) {
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data = pixels;
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cnt = length;
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// Set OC0B to Fast PWM, Clear on Match, Set on Bottom mode
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TCCR0A |= _BV(COM0B1);
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// Enable the clock
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TCCR0B |= _BV(CS00);
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// Now wait until the clock gets turned off.
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while (TCCR0B & _BV(CS00)) { }
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}
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void np_initialize() {
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// latch(addr);
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TCCR0B = _BV(WGM02);
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TCCR0A = _BV(WGM01) | _BV(WGM00);
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TIMSK = _BV(TOIE0);
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OCR0A = T_FRAME;
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uint8_t hi = PORTB | (1 << 3);
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uint8_t low = PORTB & ~(1 << 3);
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cli();
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for (int idx = 0; idx < length; idx++) {
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write_byte(&PORTB, hi, low, pixels[idx]);
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}
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_delay_us(100);
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sei();
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}
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@ -17,8 +17,8 @@ typedef struct RGBW_s {
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uint8_t w;
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} rgbw_t;
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void np_initialize();
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void np_write_rgb(io_pin_t *addr, rgb_t *values, uint8_t length);
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// void np_initialize();
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// void np_write_rgb(io_pin_t *addr, rgb_t *values, uint8_t length);
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void write_pixels(const uint8_t *pixels, uint8_t length);
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// void np_write_grb(io_pin_t *addr, rgb_t *values, uint8_t length);
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// void np_write_rgbw(io_pin_t *addr, rgbw_t *values, uint8_t length);
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