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/*
ChibiOS/RT - Copyright (C) 2006-2007 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 STM32/adc_lld.h
* @brief STM32 ADC subsystem low level driver header.
* @addtogroup STM32_ADC
* @{
*/
#ifndef _ADC_LLD_H_
#define _ADC_LLD_H_
#if CH_HAL_USE_ADC || defined(__DOXYGEN__)
/*===========================================================================*/
/* Driver pre-compile time settings. */
/*===========================================================================*/
/**
* @brief ADC1 driver enable switch.
* @details If set to @p TRUE the support for ADC1 is included.
* @note The default is @p TRUE.
*/
#if !defined(USE_STM32_ADC1) || defined(__DOXYGEN__)
#define USE_STM32_ADC1 TRUE
#endif
/**
* @brief ADC1 DMA priority (0..3|lowest..highest).
*/
#if !defined(STM32_ADC1_DMA_PRIORITY) || defined(__DOXYGEN__)
#define STM32_ADC1_DMA_PRIORITY 1
#endif
/**
* @brief ADC1 interrupt priority level setting.
* @note @p BASEPRI_KERNEL >= @p STM32_ADC1_IRQ_PRIORITY > @p PRIORITY_PENDSV.
*/
#if !defined(STM32_ADC1_IRQ_PRIORITY) || defined(__DOXYGEN__)
#define STM32_ADC1_IRQ_PRIORITY 0x70
#endif
/**
* @brief ADC1 DMA error hook.
* @note The default action for DMA errors is a system halt because DMA error
* can only happen because programming errors.
*/
#if !defined(STM32_ADC1_DMA_ERROR_HOOK) || defined(__DOXYGEN__)
#define STM32_ADC1_DMA_ERROR_HOOK() chSysHalt()
#endif
/*===========================================================================*/
/* Driver constants. */
/*===========================================================================*/
#define ADC_CR2_EXTSEL_SRC(n) ((n) << 17) /**< @brief Trigger source. */
#define ADC_CR2_EXTSEL_SWSTART (7 << 17) /**< @brief Software trigger. */
#define ADC_CHANNEL_IN0 0 /**< @brief External analog input 0. */
#define ADC_CHANNEL_IN1 1 /**< @brief External analog input 1. */
#define ADC_CHANNEL_IN2 2 /**< @brief External analog input 2. */
#define ADC_CHANNEL_IN3 3 /**< @brief External analog input 3. */
#define ADC_CHANNEL_IN4 4 /**< @brief External analog input 4. */
#define ADC_CHANNEL_IN5 5 /**< @brief External analog input 5. */
#define ADC_CHANNEL_IN6 6 /**< @brief External analog input 6. */
#define ADC_CHANNEL_IN7 7 /**< @brief External analog input 7. */
#define ADC_CHANNEL_IN8 8 /**< @brief External analog input 8. */
#define ADC_CHANNEL_IN9 9 /**< @brief External analog input 9. */
#define ADC_CHANNEL_IN10 10 /**< @brief External analog input 10. */
#define ADC_CHANNEL_IN11 11 /**< @brief External analog input 11. */
#define ADC_CHANNEL_IN12 12 /**< @brief External analog input 12. */
#define ADC_CHANNEL_IN13 13 /**< @brief External analog input 13. */
#define ADC_CHANNEL_IN14 14 /**< @brief External analog input 14. */
#define ADC_CHANNEL_IN15 15 /**< @brief External analog input 15. */
#define ADC_CHANNEL_SENSOR 16 /**< @brief Internal temperature sensor.*/
#define ADC_CHANNEL_VREFINT 17 /**< @brief Internal reference. */
#define ADC_SQR1_NUM_CH(n) (((n) - 1) << 20)
#define ADC_SQR3_SQ0_N(n) ((n) << 0)
#define ADC_SQR3_SQ1_N(n) ((n) << 5)
#define ADC_SQR3_SQ2_N(n) ((n) << 10)
#define ADC_SQR3_SQ3_N(n) ((n) << 15)
#define ADC_SQR3_SQ4_N(n) ((n) << 20)
#define ADC_SQR3_SQ5_N(n) ((n) << 25)
#define ADC_SQR2_SQ6_N(n) ((n) << 0)
#define ADC_SQR2_SQ7_N(n) ((n) << 5)
#define ADC_SQR2_SQ8_N(n) ((n) << 10)
#define ADC_SQR2_SQ9_N(n) ((n) << 15)
#define ADC_SQR2_SQ10_N(n) ((n) << 20)
#define ADC_SQR2_SQ11_N(n) ((n) << 25)
#define ADC_SQR1_SQ13_N(n) ((n) << 0)
#define ADC_SQR1_SQ14_N(n) ((n) << 5)
#define ADC_SQR1_SQ15_N(n) ((n) << 10)
#define ADC_SQR1_SQ16_N(n) ((n) << 15)
/*===========================================================================*/
/* 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 ADC notification callback type.
* @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)(adcsample_t *buffer, size_t n);
/**
* @brief Conversion group configuration structure.
* @details This implementation-dependent structure describes a conversion
* operation.
*/
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;
/* End of the mandatory fields.*/
/**
* @brief ADC CR1 register initialization data.
* @note All the required bits must be defined into this field except
* @p ADC_CR1_SCAN that is enforced inside the driver.
*/
uint32_t acg_cr1;
/**
* @brief ADC CR2 register initialization data.
* @note All the required bits must be defined into this field except
* @p ADC_CR2_DMA and @p ADC_CR2_ADON that are enforced inside the
* driver.
*/
uint32_t acg_cr2;
/**
* @brief ADC SMPR1 register initialization data.
*/
uint32_t acg_smpr1;
/**
* @brief ADC SMPR2 register initialization data.
*/
uint32_t acg_smpr2;
/**
* @brief ADC SQR1 register initialization data.
*/
uint32_t acg_sqr1;
/**
* @brief ADC SQR2 register initialization data.
*/
uint32_t acg_sqr2;
/**
* @brief ADC SQR3 register initialization data.
*/
uint32_t acg_sqr3;
} ADCConversionGroup;
/**
* @brief Driver configuration structure.
* @note It could be empty on some architectures.
*/
typedef struct {
/* * <----------
* @brief ADC prescaler setting.
* @note This field can assume one of the following values:
* @p RCC_CFGR_ADCPRE_DIV2, @p RCC_CFGR_ADCPRE_DIV4,
* @p RCC_CFGR_ADCPRE_DIV6, @p RCC_CFGR_ADCPRE_DIV8.
*/
/* uint32_t ac_prescaler;*/
} ADCConfig;
/**
* @brief Structure representing an ADC driver.
*/
typedef struct {
/**
* @brief Driver state.
*/
adcstate_t ad_state;
/**
* @brief Current configuration data.
*/
const ADCConfig *ad_config;
/**
* @brief Synchronization semaphore.
*/
Semaphore ad_sem;
/**
* @brief Current callback function or @p NULL.
*/
adccallback_t ad_callback;
/**
* @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;
/* End of the mandatory fields.*/
/**
* @brief Pointer to the ADCx registers block.
*/
ADC_TypeDef *ad_adc;
/**
* @brief Pointer to the DMA channel registers block.
*/
DMA_Channel_TypeDef *ad_dma;
/**
* @brief DMA priority bit mask.
*/
uint32_t ad_dmaprio;
} ADCDriver;
/*===========================================================================*/
/* External declarations. */
/*===========================================================================*/
/** @cond never*/
#if USE_STM32_ADC1
extern ADCDriver ADCD1;
#endif
#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
/** @endcond*/
#endif /* CH_HAL_USE_ADC */
#endif /* _ADC_LLD_H_ */
/** @} */
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