/* $Id$ */ /* * 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 "kernel.h" #include "tasks.h" #define MUXMASK 0x07 uint16_t rdadc(uint8_t ch) { ADMUX &= ~MUXMASK; ADMUX |= (ch & MUXMASK); ADCSRA |= _BV(ADSC); loop_until_bit_is_clear(ADCSRA, ADSC); return ADCW; } void adc(void *arg) { struct adcarg *a = (struct adcarg *)arg; uint8_t i; ADCSRA |= (_BV(ADEN) | ADC_FLAGS); // ADMUX |= _BV(REFS0); for (;;) { wait(0); for (i = 0; i < ADCCHANNELS; i++) a->value[i] = rdadc(i); signal(0); period(MSEC(8 * ADCCHANNELS)); } }