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/*
* This file is subject to the terms of the GFX License. If a copy of
* the license was not distributed with this file, you can obtain one at:
*
* http://ugfx.org/license.html
*/
/**
* @file src/gadc/driver.h
* @brief GADC - Periodic ADC driver header file.
*
* @defgroup Driver Driver
* @ingroup GADC
* @{
*/
#ifndef _GADC_LLD_H
#define _GADC_LLD_H
#include "gfx.h"
#if GFX_USE_GADC || defined(__DOXYGEN__)
/*===========================================================================*/
/* Type definitions */
/*===========================================================================*/
/**
* @brief The structure passed to start a timer conversion
* @{
*/
typedef struct GadcTimerJob_t {
uint32_t physdev; // @< The physical device/s. The exact meaning of physdev is hardware dependent.
uint32_t frequency; // @< The frequency to sample
adcsample_t *buffer; // @< Where to put the samples
size_t todo; // @< How many conversions to do
size_t done; // @< How many conversions have already been done
} GadcTimerJob;
/** @} */
/**
* @brief The structure passed to do a single conversion
* @{
*/
typedef struct GadcNonTimerJob_t {
uint32_t physdev; // @< The physical device/s. The exact meaning of physdev is hardware dependent.
adcsample_t *buffer; // @< Where to put the samples.
} GadcNonTimerJob;
/** @} */
/*===========================================================================*/
/* External declarations. */
/*===========================================================================*/
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief These routines are the callbacks that the driver uses.
* @details Defined in the high level GADC code.
*
* @notapi
* @{
*/
/**
* @brief Indicate that some data has been placed into the buffer for the current job
*
* @param[in] n The number of samples placed in the buffer
*
* @note Calling this with n = 0 causes the current job to be terminated early or aborted.
* It can be called in this mode on an ADC conversion error. Any job will then be
* restarted by the high level code as appropriate.
*/
void gadcGotDataI(size_t n);
/**
* @}
*/
/**
* @brief Initialise the driver
*
* @api
*/
void gadc_lld_init(void);
/**
* @brief Using the hardware dependant "physdev", return the number of samples for each conversion
*
* @param[in] physdev The hardware dependent physical device descriptor
*
* @return The number of samples per conversion
*
* @api
*/
size_t gadc_lld_samplesperconversion(uint32_t physdev);
/**
* @brief Start a periodic timer for high frequency conversions.
*
* @param[in] freq The frequency for the timer
*
* @note This will only be called if the timer is currently stopped.
*
* @api
* @iclass
*/
void gadc_lld_start_timerI(uint32_t freq);
/**
* @brief Stop the periodic timer for high frequency conversions.
*
* @note This will only be called if the timer is currently running and all timer jobs
* have been completed/aborted.
*
* @api
* @iclass
*/
void gadc_lld_stop_timerI(void);
/**
* @brief Start a set of high frequency conversions.
*
* @note This will only be called if the timer is currently running and the ADC should be ready for
* a new job.
*
* @param[in] pjob The job to be started.
*
* @api
* @iclass
*/
void gadc_lld_timerjobI(GadcTimerJob *pjob);
/**
* @brief Start a non-timer conversion.
*
* @note This will only be called if the ADC should be ready for a new job.
*
* @param[in] pjob The job to be started
*
* @api
* @iclass
*/
void gadc_lld_nontimerjobI(GadcNonTimerJob *pjob);
#ifdef __cplusplus
}
#endif
#endif /* GFX_USE_GADC */
#endif /* _GADC_LLD_H */
/** @} */
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