/* 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 . */ /** * @file STM32/adc_lld.h * @brief STM32 ADC subsystem low level driver header. * * @addtogroup ADC * @{ */ #ifndef _ADC_LLD_H_ #define _ADC_LLD_H_ #if CH_HAL_USE_ADC || defined(__DOXYGEN__) /*===========================================================================*/ /* 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. */ /*===========================================================================*/ /* 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(STM32_ADC_USE_ADC1) || defined(__DOXYGEN__) #define STM32_ADC_USE_ADC1 TRUE #endif /** * @brief ADC1 DMA priority (0..3|lowest..highest). */ #if !defined(STM32_ADC_ADC1_DMA_PRIORITY) || defined(__DOXYGEN__) #define STM32_ADC_ADC1_DMA_PRIORITY 3 #endif /** * @brief ADC1 interrupt priority level setting. */ #if !defined(STM32_ADC_ADC1_IRQ_PRIORITY) || defined(__DOXYGEN__) #define STM32_ADC_ADC1_IRQ_PRIORITY 5 #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 /*===========================================================================*/ /* Derived constants and error checks. */ /*===========================================================================*/ #if !STM32_ADC_USE_ADC1 #error "ADC driver activated but no ADC peripheral assigned" #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 The use of this configuration structure requires knowledge of * STM32 ADC cell registers interface, please refer to the STM32 * reference manual for details. */ 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.*/ /** * @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 { } ADCConfig; /** * @brief Structure representing an ADC driver. */ 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 #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.*/ /** * @brief Pointer to the ADCx registers block. */ ADC_TypeDef *ad_adc; /** * @brief Pointer to the DMA registers block. */ stm32_dma_channel_t *ad_dmachp; /** * @brief DMA CCR register bit mask. */ uint32_t ad_dmaccr; }; /*===========================================================================*/ /* Driver macros. */ /*===========================================================================*/ #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) /*===========================================================================*/ /* External declarations. */ /*===========================================================================*/ #if STM32_ADC_USE_ADC1 && !defined(__DOXYGEN__) 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 #endif /* CH_HAL_USE_ADC */ #endif /* _ADC_LLD_H_ */ /** @} */