hal.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 hal.c
* @brief HAL subsystem code.
*
* @addtogroup HAL
* @{
*/
#include "ch.h"
#include "hal.h"
/*===========================================================================*/
/* Driver local definitions. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver exported variables. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver local variables. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver local functions. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver exported functions. */
/*===========================================================================*/
/**
* @brief HAL initialization.
* @details This function invokes the low level initialization code then
* initializes all the drivers enabled in the HAL. Finally the
* board-specific initialization is performed by invoking
* @p boardInit() (usually defined in @p board.c).
*
* @init
*/
void halInit(void) {
hal_lld_init();
#if HAL_USE_TM || defined(__DOXYGEN__)
tmInit();
#endif
#if HAL_USE_PAL || defined(__DOXYGEN__)
palInit(&pal_default_config);
#endif
#if HAL_USE_ADC || defined(__DOXYGEN__)
adcInit();
#endif
#if HAL_USE_CAN || defined(__DOXYGEN__)
canInit();
#endif
#if HAL_USE_EXT || defined(__DOXYGEN__)
extInit();
#endif
#if HAL_USE_GPT || defined(__DOXYGEN__)
gptInit();
#endif
#if HAL_USE_I2C || defined(__DOXYGEN__)
i2cInit();
#endif
#if HAL_USE_ICU || defined(__DOXYGEN__)
icuInit();
#endif
#if HAL_USE_MAC || defined(__DOXYGEN__)
macInit();
#endif
#if HAL_USE_PWM || defined(__DOXYGEN__)
pwmInit();
#endif
#if HAL_USE_SERIAL || defined(__DOXYGEN__)
sdInit();
#endif
#if HAL_USE_SDC || defined(__DOXYGEN__)
sdcInit();
#endif
#if HAL_USE_SPI || defined(__DOXYGEN__)
spiInit();
#endif
#if HAL_USE_UART || defined(__DOXYGEN__)
uartInit();
#endif
#if HAL_USE_USB || defined(__DOXYGEN__)
usbInit();
#endif
#if HAL_USE_MMC_SPI || defined(__DOXYGEN__)
mmcInit();
#endif
#if HAL_USE_SERIAL_USB || defined(__DOXYGEN__)
sduInit();
#endif
#if HAL_USE_RTC || defined(__DOXYGEN__)
rtcInit();
#endif
/* Board specific initialization.*/
boardInit();
}
#if HAL_IMPLEMENTS_COUNTERS || defined(__DOXYGEN__)
/**
* @brief Realtime window test.
* @details This function verifies if the current realtime counter value
* lies within the specified range or not. The test takes care
* of the realtime counter wrapping to zero on overflow.
* @note When start==end then the function returns always true because the
* whole time range is specified.
* @note This is an optional service that could not be implemented in
* all HAL implementations.
* @note This function can be called from any context.
*
* @par Example 1
* Example of a guarded loop using the realtime counter. The loop implements
* a timeout after one second.
* @code
* halrtcnt_t start = halGetCounterValue();
* halrtcnt_t timeout = start + S2RTT(1);
* while (my_condition) {
* if (!halIsCounterWithin(start, timeout)
* return TIMEOUT;
* // Do something.
* }
* // Continue.
* @endcode
*
* @par Example 2
* Example of a loop that lasts exactly 50 microseconds.
* @code
* halrtcnt_t start = halGetCounterValue();
* halrtcnt_t timeout = start + US2RTT(50);
* while (halIsCounterWithin(start, timeout)) {
* // Do something.
* }
* // Continue.
* @endcode
*
* @param[in] start the start of the time window (inclusive)
* @param[in] end the end of the time window (non inclusive)
* @retval TRUE current time within the specified time window.
* @retval FALSE current time not within the specified time window.
*
* @special
*/
bool_t halIsCounterWithin(halrtcnt_t start, halrtcnt_t end) {
halrtcnt_t now = halGetCounterValue();
return end > start ? (now >= start) && (now < end) :
(now >= start) || (now < end);
}
/**
* @brief Polled delay.
* @note The real delays is always few cycles in excess of the specified
* value.
* @note This is an optional service that could not be implemented in
* all HAL implementations.
* @note This function can be called from any context.
*
* @param[in] ticks number of ticks
*
* @special
*/
void halPolledDelay(halrtcnt_t ticks) {
halrtcnt_t start = halGetCounterValue();
halrtcnt_t timeout = start + (ticks);
while (halIsCounterWithin(start, timeout))
;
}
#endif /* HAL_IMPLEMENTS_COUNTERS */
/** @} */