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Set up the flame build in the flake

i2c
Savanni D'Gerinel 2022-05-11 19:25:19 -04:00
parent 1f394f20ff
commit 059e4eb524
2 changed files with 78 additions and 22 deletions
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10
flake.nix
View File

@ -1,5 +1,5 @@
{
description = "Wearables";
description = "AVR";
inputs = {
nixpkgs.url = "nixpkgs/nixos-21.11";
@ -11,12 +11,12 @@
supportedSystems = [ "x86_64-linux" "avr-none" ];
in
{
defaultPackage."x86_64-linux" =
packages."x86_64-linux"."flame" =
let
pkgs = import nixpkgs { system = "x86_64-linux"; };
avr = pkgs.pkgsCross.avr.buildPackages;
in pkgs.stdenv.mkDerivation rec {
name = "hello";
name = "flame";
src = ./.;
MCU = "attiny85";
@ -25,8 +25,6 @@
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}'';
buildPhase = ''
set -x
${avr.gcc}/bin/avr-gcc ${CFLAGS} -I${src}/base -o base.o -c ${src}/base/base.c
${avr.gcc}/bin/avr-gcc ${CFLAGS} -I${src}/base -o sk9822.o -c ${src}/sk9822/sk9822.c
${avr.gcc}/bin/avr-gcc ${CFLAGS} -I${src}/base -I${src}/sk9822 -o main.o -c ${src}/flame/main.c
@ -52,7 +50,7 @@
];
in
pkgs.mkShell {
name = "Wearables-shell";
name = "avr-shell";
buildInputs = avr;
GCC = pkgs.pkgsCross.avr.buildPackages.gcc;

90
flame/main.c
View File

@ -4,6 +4,9 @@
#include <base.h>
#include <sk9822.h>
#define FPS 60
#define FRAME_DELAY_MS 1000 / FPS
uint8_t random_step(uint8_t value, uint8_t min, uint8_t max, rng_t *rng) {
int8_t step = (rng_sample(rng) % 32) - 16;
uint16_t new_value = value + step;
@ -16,10 +19,77 @@ uint8_t random_step(uint8_t value, uint8_t min, uint8_t max, rng_t *rng) {
}
}
typedef enum {
normal,
creepy,
} color_scheme_e;
typedef struct {
rgb_t lamp;
color_scheme_e color_scheme;
int8_t red_step;
int8_t green_step;
int8_t blue_step;
uint8_t frame;
uint8_t duration;
} animation_t;
animation_t animation_new() {
return (animation_t){
.lamp = (rgb_t){ .brightness = 9, .r = 212, .g = 50, .b = 0 },
.color_scheme = normal,
.red_step = 0,
.green_step = 0,
.blue_step = 0,
.frame = 0,
.duration = 0,
};
}
void animation_flicker(animation_t *animation, rng_t *rng) {
uint8_t rdest;
uint8_t gdest;
switch (animation->color_scheme) {
case normal:
rdest = random_step(animation->lamp.r, 180, 255, rng);
gdest = random_step(animation->lamp.g, 10, 40, rng);
animation->red_step = 60 / (rdest - animation->lamp.r);
animation->green_step = 60 / (gdest - animation->lamp.g);
animation->duration = 60;
break;
case creepy:
break;
}
}
void animation_step(animation_t *animation, rng_t *rng) {
if (animation->duration == 0) {
animation_flicker(animation, rng);
} else {
if (animation->frame == animation->duration) {
animation->frame = 0;
animation->duration = 0;
animation->red_step = 0;
animation->green_step = 0;
animation->blue_step = 0;
} else {
animation->frame++;
animation->lamp.r += animation->red_step;
animation->lamp.g += animation->green_step;
animation->lamp.b += animation->blue_step;
}
}
}
/*
void flicker(rgb_t *pixel, rng_t *rng) {
pixel->r = random_step(pixel->r, 180, 255, rng);
pixel->g = random_step(pixel->g, 10, 40, rng);
}
*/
int main (void) {
DDRB = _BV(2) | _BV(1) | _BV(0);
@ -29,23 +99,11 @@ int main (void) {
io_pin_t data_pin = { .port = &PORTB, .pin = 0 };
io_pin_t clock_pin = { .port = &PORTB, .pin = 2 };
rgb_t lamps[2] = { { .brightness = 9, .r = 212, .g = 50, .b = 0 },
{ .brightness = 1, .r = 0, .g = 0, .b = 0 } };
int8_t step_1 = 1;
rng_t rng = rng_new(0);
animation_t animation = animation_new();
while (1) {
send_pixels(data_pin, clock_pin, lamps, 2);
flicker(&lamps[0], &rng);
lamps[1].r += step_1;
if (lamps[1].r == 255) {
step_1 = -1;
} else if (lamps[1].r == 0) {
step_1 = 1;
}
_delay_ms(16);
animation_step(&animation, &rng);
send_pixels(data_pin, clock_pin, &animation.lamp, 1);
_delay_ms(FRAME_DELAY_MS);
}
}