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/*
ChibiOS/HAL - Copyright (C) 2006,2007,2008,2009,2010,
2011,2012,2013,2014 Giovanni Di Sirio.
This file is part of ChibiOS/HAL
ChibiOS/HAL 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/>.
*/
/**
* @file gpt.h
* @brief GPT Driver macros and structures.
*
* @addtogroup GPT
* @{
*/
#ifndef _GPT_H_
#define _GPT_H_
#if HAL_USE_GPT || defined(__DOXYGEN__)
/*===========================================================================*/
/* Driver constants. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver pre-compile time settings. */
/*===========================================================================*/
/*===========================================================================*/
/* Derived constants and error checks. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver data structures and types. */
/*===========================================================================*/
/**
* @brief Driver state machine possible states.
*/
typedef enum {
GPT_UNINIT = 0, /**< Not initialized. */
GPT_STOP = 1, /**< Stopped. */
GPT_READY = 2, /**< Ready. */
GPT_CONTINUOUS = 3, /**< Active in continuous mode. */
GPT_ONESHOT = 4 /**< Active in one shot mode. */
} gptstate_t;
/**
* @brief Type of a structure representing a GPT driver.
*/
typedef struct GPTDriver GPTDriver;
/**
* @brief GPT notification callback type.
*
* @param[in] gptp pointer to a @p GPTDriver object
*/
typedef void (*gptcallback_t)(GPTDriver *gptp);
#include "gpt_lld.h"
/*===========================================================================*/
/* Driver macros. */
/*===========================================================================*/
/**
* @brief Changes the interval of GPT peripheral.
* @details This function changes the interval of a running GPT unit.
* @pre The GPT unit must be running in continuous mode.
* @post The GPT unit interval is changed to the new value.
*
* @param[in] gptp pointer to a @p GPTDriver object
* @param[in] interval new cycle time in timer ticks
*
* @iclass
*/
#define gptChangeIntervalI(gptp, interval) { \
gpt_lld_change_interval(gptp, interval); \
}
/**
* @brief Returns the interval of GPT peripheral.
* @pre The GPT unit must be running in continuous mode.
*
* @param[in] gptp pointer to a @p GPTDriver object
* @return The current interval.
*
* @xclass
*/
#define gptGetIntervalX(gptp) gpt_lld_get_interval(gptp)
/**
* @brief Returns the counter value of GPT peripheral.
* @pre The GPT unit must be running in continuous mode.
* @note The nature of the counter is not defined, it may count upward
* or downward, it could be continuously running or not.
*
* @param[in] gptp pointer to a @p GPTDriver object
* @return The current counter value.
*
* @xclass
*/
#define gptGetCounterX(gptp) gpt_lld_get_counter(gptp)
/*===========================================================================*/
/* External declarations. */
/*===========================================================================*/
#ifdef __cplusplus
extern "C" {
#endif
void gptInit(void);
void gptObjectInit(GPTDriver *gptp);
void gptStart(GPTDriver *gptp, const GPTConfig *config);
void gptStop(GPTDriver *gptp);
void gptStartContinuous(GPTDriver *gptp, gptcnt_t interval);
void gptStartContinuousI(GPTDriver *gptp, gptcnt_t interval);
void gptChangeInterval(GPTDriver *gptp, gptcnt_t interval);
void gptStartOneShot(GPTDriver *gptp, gptcnt_t interval);
void gptStartOneShotI(GPTDriver *gptp, gptcnt_t interval);
void gptStopTimer(GPTDriver *gptp);
void gptStopTimerI(GPTDriver *gptp);
void gptPolledDelay(GPTDriver *gptp, gptcnt_t interval);
#ifdef __cplusplus
}
#endif
#endif /* HAL_USE_GPT */
#endif /* _GPT_H_ */
/** @} */
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