/* $Id$ */ /* * Copyright (c) 2010 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. */ #ifndef __KERNEL_H #define __KERNEL_H #ifndef TASKS #warning TASKS not set, fallback to default: 8 #define TASKS 8 #endif #ifndef SEMAPHORES #warning SEMAPHORES not set, fallback to default: 4 #define SEMAPHORES 4 #endif #ifndef STACK #warning STACK not set, fallback to default: 64 #define STACK 64 #endif #ifndef F_CPU #warning F_CPU not set, fallback to default: 16MHz #define F_CPU 16000000 #endif #ifndef PRESCALE #warning PRESCALE not set, fallback to default: 1 #define PRESCALE 1 #endif #if (PRESCALE == 1) #define TIMER_FLAGS (_BV(CS10)) #elif (PRESCALE == 8) #define TIMER_FLAGS (_BV(CS11)) #elif (PRESCALE == 64) #define TIMER_FLAGS (_BV(CS11) | _BV(CS10)) #elif (PRESCALE == 256) #define TIMER_FLAGS (_BV(CS12)) #elif (PRESCALE == 1024) #define TIMER_FLAGS (_BV(CS12) | _BV(CS10)) #else #error invalid PRESCALE value #endif #define Hz (F_CPU / PRESCALE) #define kHz (Hz / 1000) #define MHz (kHz / 1000) #if (!MHz) #error MHz value too small, adjust PRESCALE and/or F_CPU #endif #if (!kHz) #error kHz value too small, adjust PRESCALE and/or F_CPU #endif #if (!Hz) #error Hz value too small, adjust PRESCALE and/or F_CPU #endif #define USECMAX (INT32_MAX / MHz) #define MSECMAX (INT32_MAX / kHz) #define SECMAX (INT32_MAX / Hz) #define USEC(T) ((uint32_t)(T) * MHz) #define MSEC(T) ((uint32_t)(T) * kHz) #define SEC(T) ((uint32_t)(T) * Hz) /* __BEGIN_DECLS */ void init(uint8_t stack); void exec(void (*fun)(void *), void *args, uint8_t stack); void wait(uint8_t chan); void signal(uint8_t chan); void suspend(void); void sleep(uint32_t sec, uint32_t usec); void yield(void); uint32_t now(void); uint8_t running(void); uint8_t rqlen(void); uint8_t semaphore(void); /* __END_DECLS */ #endif