139 lines
4.3 KiB
C
139 lines
4.3 KiB
C
/*
|
|
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
|
|
2011 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/>.
|
|
*/
|
|
|
|
/**
|
|
* @file templates/icu_lld.h
|
|
* @brief ICU Driver subsystem low level driver header template.
|
|
*
|
|
* @addtogroup ICU
|
|
* @{
|
|
*/
|
|
|
|
#ifndef _ICU_LLD_H_
|
|
#define _ICU_LLD_H_
|
|
|
|
#if HAL_USE_ICU || defined(__DOXYGEN__)
|
|
|
|
/*===========================================================================*/
|
|
/* Driver constants. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* Driver pre-compile time settings. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* Derived constants and error checks. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* Driver data structures and types. */
|
|
/*===========================================================================*/
|
|
|
|
/**
|
|
* @brief ICU driver mode.
|
|
*/
|
|
typedef enum {
|
|
ICU_INPUT_ACTIVE_HIGH = 0, /**< Trigger on rising edge. */
|
|
ICU_INPUT_ACTIVE_LOW = 1, /**< Trigger on falling edge. */
|
|
} icumode_t;
|
|
|
|
/**
|
|
* @brief ICU frequency type.
|
|
*/
|
|
typedef uint32_t icufreq_t;
|
|
|
|
/**
|
|
* @brief ICU counter type.
|
|
*/
|
|
typedef uint16_t icucnt_t;
|
|
|
|
/**
|
|
* @brief Driver configuration structure.
|
|
* @note It could be empty on some architectures.
|
|
*/
|
|
typedef struct {
|
|
/**
|
|
* @brief Driver mode.
|
|
*/
|
|
icumode_t mode;
|
|
/**
|
|
* @brief Timer clock in Hz.
|
|
* @note The low level can use assertions in order to catch invalid
|
|
* frequency specifications.
|
|
*/
|
|
icufreq_t frequency;
|
|
/**
|
|
* @brief Callback for pulse width measurement.
|
|
*/
|
|
icucallback_t width_cb;
|
|
/**
|
|
* @brief Callback for cycle period measurement.
|
|
*/
|
|
icucallback_t period_cb;
|
|
/* End of the mandatory fields.*/
|
|
} ICUConfig;
|
|
|
|
/**
|
|
* @brief Structure representing an ICU driver.
|
|
*/
|
|
struct ICUDriver {
|
|
/**
|
|
* @brief Driver state.
|
|
*/
|
|
icustate_t state;
|
|
/**
|
|
* @brief Current configuration data.
|
|
*/
|
|
const ICUConfig *config;
|
|
#if defined(ICU_DRIVER_EXT_FIELDS)
|
|
ICU_DRIVER_EXT_FIELDS
|
|
#endif
|
|
/* End of the mandatory fields.*/
|
|
};
|
|
|
|
/*===========================================================================*/
|
|
/* Driver macros. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* External declarations. */
|
|
/*===========================================================================*/
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
void icu_lld_init(void);
|
|
void icu_lld_start(ICUDriver *icup);
|
|
void icu_lld_stop(ICUDriver *icup);
|
|
void icu_lld_enable(ICUDriver *icup);
|
|
void icu_lld_disable(ICUDriver *icup);
|
|
icucnt_t icu_lld_get_width(ICUDriver *icup);
|
|
icucnt_t icu_lld_get_period(ICUDriver *icup);
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* HAL_USE_ICU */
|
|
|
|
#endif /* _ICU_LLD_H_ */
|
|
|
|
/** @} */
|