/* $Id$ */ /* * Copyright (c) 2011 Dimitri Sokolyuk * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include #include #include #include "kernel.h" #include "tasks.h" void hsv(uint8_t *, uint8_t *, uint8_t *, uint16_t, uint8_t, uint8_t); void rgb(void *arg) { struct rgbarg *a = (struct rgbarg *)arg; uint16_t i = 0; uint8_t r, g, b, v = 0; for (;;) { lock(Adc); v = *a->v; /* 8bit */ unlock(Adc); i = (i + 1) % 360; hsv(&r, &g, &b, i, 255, v); lock(RGB); a->r = r; a->g = g; a->b = b; unlock(RGB); sleep(0, 234375); } } #if 0 #define SCALE(x) (((x) << 6) + ((x) << 4)) /* 50Hz */ #else #define SCALE(x) ((x) << 6) /* 60Hz */ #endif void pwm(void *arg) { struct pwmarg *a = (struct pwmarg *)arg; uint32_t t; DDRB |= _BV(a->pin); PORTB &= ~_BV(a->pin); for (;;) { lock(RGB); t = *a->value; unlock(RGB); /* on */ if (t) { PORTB |= _BV(a->pin); sleep(0, SCALE(t)); } /* off */ if ((t = UINT8_MAX - t)) { PORTB &= ~_BV(a->pin); sleep(0, SCALE(t)); } } }