187 lines
5.9 KiB
C
187 lines
5.9 KiB
C
/*
|
|
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010 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/adc_lld.h
|
|
* @brief ADC Driver subsystem low level driver header template.
|
|
*
|
|
* @addtogroup ADC
|
|
* @{
|
|
*/
|
|
|
|
#ifndef _ADC_LLD_H_
|
|
#define _ADC_LLD_H_
|
|
|
|
#if CH_HAL_USE_ADC || defined(__DOXYGEN__)
|
|
|
|
/*===========================================================================*/
|
|
/* Driver constants. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* Driver pre-compile time settings. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* Derived constants and error checks. */
|
|
/*===========================================================================*/
|
|
|
|
#if !CH_USE_SEMAPHORES
|
|
#error "the ADC driver requires CH_USE_SEMAPHORES"
|
|
#endif
|
|
|
|
/*===========================================================================*/
|
|
/* Driver data structures and types. */
|
|
/*===========================================================================*/
|
|
|
|
/**
|
|
* @brief ADC sample data type.
|
|
*/
|
|
typedef uint16_t adcsample_t;
|
|
|
|
/**
|
|
* @brief Channels number in a conversion group.
|
|
*/
|
|
typedef uint16_t adc_channels_num_t;
|
|
|
|
/**
|
|
* @brief Type of a structure representing an ADC driver.
|
|
*/
|
|
typedef struct ADCDriver ADCDriver;
|
|
|
|
/**
|
|
* @brief ADC notification callback type.
|
|
*
|
|
* @param[in] adcp pointer to the @p ADCDriver object triggering the
|
|
* callback
|
|
* @param[in] buffer pointer to the most recent samples data
|
|
* @param[in] n number of buffer rows available starting from @p buffer
|
|
*/
|
|
typedef void (*adccallback_t)(ADCDriver *adcp, adcsample_t *buffer, size_t n);
|
|
|
|
/**
|
|
* @brief Conversion group configuration structure.
|
|
* @details This implementation-dependent structure describes a conversion
|
|
* operation.
|
|
* @note Implementations may extend this structure to contain more,
|
|
* architecture dependent, fields.
|
|
*/
|
|
typedef struct {
|
|
/**
|
|
* @brief Enables the circular buffer mode for the group.
|
|
*/
|
|
bool_t acg_circular;
|
|
/**
|
|
* @brief Number of the analog channels belonging to the conversion group.
|
|
*/
|
|
adc_channels_num_t acg_num_channels;
|
|
/**
|
|
* @brief Callback function associated to the group or @p NULL.
|
|
* @note In order to use synchronous functions this field must be set to
|
|
* @p NULL, callbacks and synchronous operations are mutually
|
|
* exclusive.
|
|
*/
|
|
adccallback_t acg_endcb;
|
|
/* End of the mandatory fields.*/
|
|
} ADCConversionGroup;
|
|
|
|
/**
|
|
* @brief Driver configuration structure.
|
|
* @note Implementations may extend this structure to contain more,
|
|
* architecture dependent, fields.
|
|
* @note It could be empty on some architectures.
|
|
*/
|
|
typedef struct {
|
|
|
|
} ADCConfig;
|
|
|
|
/**
|
|
* @brief Structure representing an ADC driver.
|
|
* @note Implementations may extend this structure to contain more,
|
|
* architecture dependent, fields.
|
|
*/
|
|
struct ADCDriver {
|
|
/**
|
|
* @brief Driver state.
|
|
*/
|
|
adcstate_t ad_state;
|
|
/**
|
|
* @brief Current configuration data.
|
|
*/
|
|
const ADCConfig *ad_config;
|
|
/**
|
|
* @brief Current samples buffer pointer or @p NULL.
|
|
*/
|
|
adcsample_t *ad_samples;
|
|
/**
|
|
* @brief Current samples buffer depth or @p 0.
|
|
*/
|
|
size_t ad_depth;
|
|
/**
|
|
* @brief Current conversion group pointer or @p NULL.
|
|
*/
|
|
const ADCConversionGroup *ad_grpp;
|
|
#if ADC_USE_WAIT || defined(__DOXYGEN__)
|
|
/**
|
|
* @brief Waiting thread.
|
|
*/
|
|
Thread *ad_thread;
|
|
#endif /* SPI_USE_WAIT */
|
|
#if ADC_USE_MUTUAL_EXCLUSION || defined(__DOXYGEN__)
|
|
#if CH_USE_MUTEXES || defined(__DOXYGEN__)
|
|
/**
|
|
* @brief Mutex protecting the peripheral.
|
|
*/
|
|
Mutex ad_mutex;
|
|
#elif CH_USE_SEMAPHORES
|
|
Semaphore ad_semaphore;
|
|
#endif
|
|
#endif /* ADC_USE_MUTUAL_EXCLUSION */
|
|
#if defined(ADC_DRIVER_EXT_FIELDS)
|
|
ADC_DRIVER_EXT_FIELDS
|
|
#endif
|
|
/* End of the mandatory fields.*/
|
|
};
|
|
|
|
/*===========================================================================*/
|
|
/* Driver macros. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* External declarations. */
|
|
/*===========================================================================*/
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
void adc_lld_init(void);
|
|
void adc_lld_start(ADCDriver *adcp);
|
|
void adc_lld_stop(ADCDriver *adcp);
|
|
void adc_lld_start_conversion(ADCDriver *adcp);
|
|
void adc_lld_stop_conversion(ADCDriver *adcp);
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* CH_HAL_USE_ADC */
|
|
|
|
#endif /* _ADC_LLD_H_ */
|
|
|
|
/** @} */
|