NRF51 ADC fix
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Fabien Poussin
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b54e6ce1bc
commit
de7bb19599
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@ -73,6 +73,15 @@
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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 Possible ADC failure causes.
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* @note Error codes are architecture dependent and should not relied
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* upon.
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*/
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typedef enum {
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ADC_ERR_DMAFAILURE = 0, /**< DMA operations failure. */
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ADC_ERR_OVERFLOW = 1 /**< ADC overflow condition. */
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} adcerror_t;
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/**
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* @brief ADC sample data type.
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@ -85,118 +94,35 @@ typedef uint16_t adcsample_t;
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typedef uint8_t adc_channels_num_t;
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/**
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* @brief Type of a structure representing an ADC driver.
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* @brief Low level fields of the ADC driver structure.
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*/
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typedef struct ADCDriver ADCDriver;
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/**
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* @brief ADC notification callback type.
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*
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* @param[in] adcp pointer to the @p ADCDriver object triggering the
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* callback
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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)(ADCDriver *adcp, 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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* @note The use of this configuration structure requires knowledge of
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* STM32 ADC cell registers interface, please refer to the STM32
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* reference manual for details.
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*/
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typedef struct {
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/**
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* @brief Enables the circular buffer mode for the group.
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*/
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bool circular;
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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 num_channels;
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/**
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* @brief Callback function associated to the group or @p NULL.
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*/
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adccallback_t end_cb;
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/* End of the mandatory fields.*/
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/**
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* @brief Bitmask of channels for ADC conversion.
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*/
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uint32_t channel_mask;
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/**
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* @brief ADC CONFIG register details.
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* @note All the required bits must be defined into this field.
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*/
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uint32_t cfg;
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} ADCConversionGroup;
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/**
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* @brief Driver configuration structure.
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* @note It could be empty on some architectures.
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*/
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typedef struct {
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uint32_t dummy;
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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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struct ADCDriver {
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/**
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* @brief Driver state.
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*/
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adcstate_t state;
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/**
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* @brief Current configuration data.
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*/
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const ADCConfig *config;
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/**
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* @brief Current samples buffer pointer or @p NULL.
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*/
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adcsample_t *samples;
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/**
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* @brief Current samples buffer depth or @p 0.
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*/
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size_t depth;
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/**
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* @brief Current conversion group pointer or @p NULL.
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*/
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const ADCConversionGroup *grpp;
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#if ADC_USE_WAIT || defined(__DOXYGEN__)
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/**
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* @brief Waiting thread.
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*/
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thread_reference_t thread;
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#endif
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#if ADC_USE_MUTUAL_EXCLUSION || defined(__DOXYGEN__)
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/**
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* @brief Mutex protecting the peripheral.
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*/
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mutex_t mutex;
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#endif /* ADC_USE_MUTUAL_EXCLUSION */
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#if defined(ADC_DRIVER_EXT_FIELDS)
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ADC_DRIVER_EXT_FIELDS
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#endif
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/* End of the mandatory fields.*/
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/**
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* @brief Pointer to the ADCx registers block.
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*/
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NRF_ADC_Type *adc;
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/**
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* @brief Number of samples expected.
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*/
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size_t number_of_samples;
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/**
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* @brief Current position in the buffer.
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*/
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size_t current_index;
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/**
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* @brief Current channel index into group channel_mask.
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*/
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#define adc_lld_driver_fields \
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/* @brief Pointer to the ADCx registers block. */ \
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NRF_ADC_Type *adc; \
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/* @brief Number of samples expected. */ \
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size_t number_of_samples; \
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/* @brief Current position in the buffer. */ \
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size_t current_index; \
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/* @brief Current channel index into group channel_mask. */ \
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size_t current_channel;
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};
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/**
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* @brief Low level fields of the ADC configuration structure.
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*/
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#define adc_lld_config_fields \
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/* Dummy configuration, it is not needed.*/ \
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uint32_t dummy
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#define adc_lld_configuration_group_fields \
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/** \
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* @brief Bitmask of channels for ADC conversion. \
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*/ \
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uint32_t channel_mask; \
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/** \
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* @brief ADC CONFIG register details. \
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* @note All the required bits must be defined into this field. \
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*/ \
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uint32_t cfg;
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/*===========================================================================*/
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/* Driver macros. */
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