git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@1273 35acf78f-673a-0410-8e92-d51de3d6d3f4
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gdisirio
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/*
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ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.
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This file is part of ChibiOS/RT.
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ChibiOS/RT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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ChibiOS/RT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file STM32/adc_lld.c
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* @brief STM32 ADC subsystem low level driver source
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* @addtogroup STM32_ADC
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* @{
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*/
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#include <ch.h>
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#include <adc.h>
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/*===========================================================================*/
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/* Low Level Driver local functions. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Low Level Driver interrupt handlers. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Low Level Driver exported functions. */
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/*===========================================================================*/
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/**
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* @brief Low level ADC driver initialization.
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*/
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void adc_lld_init(void) {
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}
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/**
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* @brief Configures and activates the ADC peripheral.
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*
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* @param[in] adcp pointer to the @p ADCDriver object
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*/
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void adc_lld_start(ADCDriver *adcp) {
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if (adcp->adc_state == ADC_STOP) {
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/* Clock activation.*/
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}
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/* Configuration.*/
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}
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/**
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* @brief Deactivates the ADC peripheral.
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*
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* @param[in] adcp pointer to the @p ADCDriver object
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*/
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void adc_lld_stop(ADCDriver *adcp) {
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}
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/**
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* @brief Starts an ADC conversion.
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* @details Starts a conversion operation, there are two kind of conversion
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* modes:
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* - <b>LINEAR</b>, this mode is activated when the @p callback
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* parameter is set to @p NULL, in this mode the buffer is filled
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* once and then the conversion stops automatically.
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* - <b>CIRCULAR</b>, when a callback function is defined the
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* conversion never stops and the buffer is filled circularly.
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* During the conversion the callback function is invoked when
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* the buffer is 50% filled and when the buffer is 100% filled,
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* this way is possible to process the conversion stream in real
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* time. This kind of conversion can only be stopped by explicitly
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* invoking @p adcStopConversion().
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* .
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*
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* @param[in] adcp pointer to the @p ADCDriver object
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* @param[in] grpp pointer to a @p ADCConversionGroup object
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* @param[out] samples pointer to the samples buffer
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* @param[in] depth buffer depth (matrix rows number). The buffer depth
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* must be one or an even number.
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* @param[in] callback pointer to the conversion callback function
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* @return The operation status.
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* @retval FALSE the conversion has been started.
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* @retval TRUE the driver is busy, conversion not started.
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*
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* @note The buffer is organized as a matrix of M*N elements where M is the
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* channels number configured into the conversion group and N is the
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* buffer depth. The samples are sequentially written into the buffer
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* with no gaps.
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*/
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void adc_lld_start_conversion(ADCDriver *adcp,
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ADCConversionGroup *grpp,
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void *samples,
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size_t depth,
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adccallback_t callback) {
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}
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/**
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* @brief Stops an ongoing conversion.
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*
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* @param[in] adcp pointer to the @p ADCDriver object
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*/
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void adc_lld_stop_conversion(ADCDriver *adcp) {
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}
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/** @} */
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@ -0,0 +1,119 @@
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/*
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ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.
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This file is part of ChibiOS/RT.
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ChibiOS/RT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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ChibiOS/RT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file STM32/adc_lld.h
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* @brief STM32 ADC subsystem low level driver header
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* @addtogroup STM32_ADC
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* @{
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*/
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#ifndef _ADC_LLD_H_
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#define _ADC_LLD_H_
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/*===========================================================================*/
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/* Driver pre-compile time settings. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver constants. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver data structures and types. */
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/*===========================================================================*/
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/**
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* @brief ADC sample data type.
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*/
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typedef uint16_t adcsample_t;
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/**
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* @brief Channels number in a conversion group.
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*/
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typedef uint16_t adc_channels_num_t;
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/**
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* @brief ADC notification callback type.
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* @param[in] buffer pointer to the most recent samples data
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* @param[in] n number of buffer rows available starting from @p buffer
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*/
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typedef void (*adccallback_t)(adcsample_t *buffer, size_t n);
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/**
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* @brief Conversion group configuration structure.
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* @details This implementation-dependent structure describes a conversion
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* operation.
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*/
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typedef struct {
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/**
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* @brief Number of the analog channels belonging to the conversion group.
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*/
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adc_channels_num_t acg_num_channels;
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} ADCConversionGroup;
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/**
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* @brief Driver configuration structure.
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*/
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typedef struct {
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} ADCConfig;
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/**
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* @brief Structure representing an ADC driver.
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*/
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typedef struct {
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/**
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* @brief Driver state.
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*/
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adcstate_t adc_state;
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/**
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* @brief Current configuration data.
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*/
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const ADCConfig *adc_config;
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/**
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* @brief Semaphore for completion synchronization.
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*/
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Semaphore adc_sem;
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/* End of the mandatory fields.*/
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} ADCDriver;
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/*===========================================================================*/
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/* External declarations. */
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/*===========================================================================*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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void adc_lld_init(void);
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void adc_lld_start(ADCDriver *adcp);
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void adc_lld_stop(ADCDriver *adcp);
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void adc_lld_start_conversion(ADCDriver *adcp,
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ADCConversionGroup *grpp,
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void *samples,
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size_t depth,
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adccallback_t callback);
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void adc_lld_stop_conversion(ADCDriver *adcp);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _ADC_LLD_H_ */
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/** @} */
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*/
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*/
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typedef uint16_t adc_channels_num_t;
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typedef uint16_t adc_channels_num_t;
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/**
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* @brief Samples buffer depth.
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*/
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typedef uint16_t adc_buffer_depth_t;
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/**
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/**
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* @brief ADC notification callback type.
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* @brief ADC notification callback type.
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* @param[in] buffer pointer to the most recent samples data
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* @param[in] buffer pointer to the most recent samples data
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* @param[in] n number of buffer rows available starting from @p buffer
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* @param[in] n number of buffer rows available starting from @p buffer
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*/
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*/
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typedef void (*adccallback_t)(adcsample_t *buffer,
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typedef void (*adccallback_t)(adcsample_t *buffer, size_t n);
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adc_buffer_depth_t n);
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/**
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/**
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* @brief Conversion group configuration structure.
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* @brief Conversion group configuration structure.
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