hal_lld.c
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/*
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
2011,2012 Giovanni Di Sirio.
This file is part of ChibiOS/RT.
ChibiOS/RT is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
ChibiOS/RT is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
---
A special exception to the GPL can be applied should you wish to distribute
a combined work that includes ChibiOS/RT, without being obliged to provide
the source code for any proprietary components. See the file exception.txt
for full details of how and when the exception can be applied.
*/
/**
* @file Posix/hal_lld.c
* @brief Posix HAL subsystem low level driver code.
*
* @addtogroup POSIX_HAL
* @{
*/
#include <stdio.h>
#include <stdlib.h>
#include <sys/time.h>
#include "ch.h"
#include "hal.h"
/*===========================================================================*/
/* Driver exported variables. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver local variables. */
/*===========================================================================*/
static struct timeval nextcnt;
static struct timeval tick = {0, 1000000 / CH_FREQUENCY};
/*===========================================================================*/
/* Driver local functions. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver interrupt handlers. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver exported functions. */
/*===========================================================================*/
/**
* @brief Low level HAL driver initialization.
*/
void hal_lld_init(void) {
#if defined(__APPLE__)
puts("ChibiOS/RT simulator (OS X)\n");
#else
puts("ChibiOS/RT simulator (Linux)\n");
#endif
gettimeofday(&nextcnt, NULL);
timeradd(&nextcnt, &tick, &nextcnt);
}
/**
* @brief Interrupt simulation.
*/
void ChkIntSources(void) {
struct timeval tv;
#if HAL_USE_SERIAL
if (sd_lld_interrupt_pending()) {
dbg_check_lock();
if (chSchIsPreemptionRequired())
chSchDoReschedule();
dbg_check_unlock();
return;
}
#endif
gettimeofday(&tv, NULL);
if (timercmp(&tv, &nextcnt, >=)) {
timeradd(&nextcnt, &tick, &nextcnt);
CH_IRQ_PROLOGUE();
chSysLockFromIsr();
chSysTimerHandlerI();
chSysUnlockFromIsr();
CH_IRQ_EPILOGUE();
dbg_check_lock();
if (chSchIsPreemptionRequired())
chSchDoReschedule();
dbg_check_unlock();
}
}
/** @} */