568 lines
20 KiB
C
568 lines
20 KiB
C
/*
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ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/**
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* @file STM32F4xx/adc_lld.h
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* @brief STM32F4xx/STM32F2xx ADC subsystem low level driver header.
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*
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* @addtogroup 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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#if HAL_USE_ADC || defined(__DOXYGEN__)
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/*===========================================================================*/
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/* Driver constants. */
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/*===========================================================================*/
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/**
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* @name Absolute Maximum Ratings
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* @{
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*/
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/**
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* @brief Minimum ADC clock frequency.
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*/
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#define STM32_ADCCLK_MIN 600000
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/**
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* @brief Maximum ADC clock frequency.
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*/
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#if defined(STM32F4XX) || defined(__DOXYGEN__)
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#define STM32_ADCCLK_MAX 36000000
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#else
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#define STM32_ADCCLK_MAX 30000000
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#endif
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/** @} */
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/**
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* @name Triggers selection
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* @{
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*/
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#define ADC_CR2_EXTSEL_SRC(n) ((n) << 24) /**< @brief Trigger source. */
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/** @} */
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/**
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* @name ADC clock divider settings
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* @{
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*/
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#define ADC_CCR_ADCPRE_DIV2 0
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#define ADC_CCR_ADCPRE_DIV4 1
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#define ADC_CCR_ADCPRE_DIV6 2
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#define ADC_CCR_ADCPRE_DIV8 3
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/** @} */
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/**
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* @name Available analog channels
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* @{
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*/
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#define ADC_CHANNEL_IN0 0 /**< @brief External analog input 0. */
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#define ADC_CHANNEL_IN1 1 /**< @brief External analog input 1. */
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#define ADC_CHANNEL_IN2 2 /**< @brief External analog input 2. */
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#define ADC_CHANNEL_IN3 3 /**< @brief External analog input 3. */
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#define ADC_CHANNEL_IN4 4 /**< @brief External analog input 4. */
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#define ADC_CHANNEL_IN5 5 /**< @brief External analog input 5. */
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#define ADC_CHANNEL_IN6 6 /**< @brief External analog input 6. */
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#define ADC_CHANNEL_IN7 7 /**< @brief External analog input 7. */
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#define ADC_CHANNEL_IN8 8 /**< @brief External analog input 8. */
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#define ADC_CHANNEL_IN9 9 /**< @brief External analog input 9. */
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#define ADC_CHANNEL_IN10 10 /**< @brief External analog input 10. */
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#define ADC_CHANNEL_IN11 11 /**< @brief External analog input 11. */
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#define ADC_CHANNEL_IN12 12 /**< @brief External analog input 12. */
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#define ADC_CHANNEL_IN13 13 /**< @brief External analog input 13. */
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#define ADC_CHANNEL_IN14 14 /**< @brief External analog input 14. */
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#define ADC_CHANNEL_IN15 15 /**< @brief External analog input 15. */
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#define ADC_CHANNEL_SENSOR 16 /**< @brief Internal temperature sensor.
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@note Available onADC1 only. */
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#define ADC_CHANNEL_VREFINT 17 /**< @brief Internal reference.
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@note Available onADC1 only. */
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#define ADC_CHANNEL_VBAT 18 /**< @brief VBAT.
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@note Available onADC1 only. */
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/** @} */
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/**
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* @name Sampling rates
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* @{
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*/
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#define ADC_SAMPLE_3 0 /**< @brief 3 cycles sampling time. */
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#define ADC_SAMPLE_15 1 /**< @brief 15 cycles sampling time. */
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#define ADC_SAMPLE_28 2 /**< @brief 28 cycles sampling time. */
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#define ADC_SAMPLE_56 3 /**< @brief 56 cycles sampling time. */
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#define ADC_SAMPLE_84 4 /**< @brief 84 cycles sampling time. */
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#define ADC_SAMPLE_112 5 /**< @brief 112 cycles sampling time. */
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#define ADC_SAMPLE_144 6 /**< @brief 144 cycles sampling time. */
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#define ADC_SAMPLE_480 7 /**< @brief 480 cycles sampling time. */
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/** @} */
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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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* @name Configuration options
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* @{
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*/
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/**
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* @brief ADC common clock divider.
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* @note This setting is influenced by the VDDA voltage and other
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* external conditions, please refer to the datasheet for more
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* info.<br>
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* See section 5.3.20 "12-bit ADC characteristics".
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*/
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#if !defined(STM32_ADC_ADCPRE) || defined(__DOXYGEN__)
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#define STM32_ADC_ADCPRE ADC_CCR_ADCPRE_DIV2
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#endif
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/**
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* @brief ADC1 driver enable switch.
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* @details If set to @p TRUE the support for ADC1 is included.
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* @note The default is @p TRUE.
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*/
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#if !defined(STM32_ADC_USE_ADC1) || defined(__DOXYGEN__)
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#define STM32_ADC_USE_ADC1 FALSE
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#endif
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/**
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* @brief ADC2 driver enable switch.
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* @details If set to @p TRUE the support for ADC2 is included.
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* @note The default is @p TRUE.
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*/
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#if !defined(STM32_ADC_USE_ADC2) || defined(__DOXYGEN__)
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#define STM32_ADC_USE_ADC2 FALSE
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#endif
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/**
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* @brief ADC3 driver enable switch.
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* @details If set to @p TRUE the support for ADC3 is included.
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* @note The default is @p TRUE.
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*/
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#if !defined(STM32_ADC_USE_ADC3) || defined(__DOXYGEN__)
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#define STM32_ADC_USE_ADC3 FALSE
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#endif
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/**
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* @brief DMA stream used for ADC1 operations.
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*/
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#if !defined(STM32_ADC_ADC1_DMA_STREAM) || defined(__DOXYGEN__)
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#define STM32_ADC_ADC1_DMA_STREAM STM32_DMA_STREAM_ID(2, 4)
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#endif
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/**
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* @brief DMA stream used for ADC2 operations.
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*/
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#if !defined(STM32_ADC_ADC2_DMA_STREAM) || defined(__DOXYGEN__)
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#define STM32_ADC_ADC2_DMA_STREAM STM32_DMA_STREAM_ID(2, 2)
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#endif
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/**
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* @brief DMA stream used for ADC3 operations.
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*/
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#if !defined(STM32_ADC_ADC3_DMA_STREAM) || defined(__DOXYGEN__)
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#define STM32_ADC_ADC3_DMA_STREAM STM32_DMA_STREAM_ID(2, 1)
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#endif
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/**
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* @brief ADC1 DMA priority (0..3|lowest..highest).
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*/
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#if !defined(STM32_ADC_ADC1_DMA_PRIORITY) || defined(__DOXYGEN__)
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#define STM32_ADC_ADC1_DMA_PRIORITY 2
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#endif
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/**
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* @brief ADC2 DMA priority (0..3|lowest..highest).
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*/
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#if !defined(STM32_ADC_ADC2_DMA_PRIORITY) || defined(__DOXYGEN__)
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#define STM32_ADC_ADC2_DMA_PRIORITY 2
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#endif
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/**
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* @brief ADC3 DMA priority (0..3|lowest..highest).
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*/
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#if !defined(STM32_ADC_ADC3_DMA_PRIORITY) || defined(__DOXYGEN__)
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#define STM32_ADC_ADC3_DMA_PRIORITY 2
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#endif
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/**
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* @brief ADC interrupt priority level setting.
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* @note This setting is shared among ADC1, ADC2 and ADC3 because
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* all ADCs share the same vector.
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*/
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#if !defined(STM32_ADC_IRQ_PRIORITY) || defined(__DOXYGEN__)
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#define STM32_ADC_IRQ_PRIORITY 5
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#endif
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/**
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* @brief ADC1 DMA interrupt priority level setting.
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*/
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#if !defined(STM32_ADC_ADC1_DMA_IRQ_PRIORITY) || defined(__DOXYGEN__)
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#define STM32_ADC_ADC1_DMA_IRQ_PRIORITY 5
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#endif
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/**
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* @brief ADC2 DMA interrupt priority level setting.
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*/
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#if !defined(STM32_ADC_ADC2_DMA_IRQ_PRIORITY) || defined(__DOXYGEN__)
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#define STM32_ADC_ADC2_DMA_IRQ_PRIORITY 5
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#endif
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/**
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* @brief ADC3 DMA interrupt priority level setting.
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*/
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#if !defined(STM32_ADC_ADC3_DMA_IRQ_PRIORITY) || defined(__DOXYGEN__)
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#define STM32_ADC_ADC3_DMA_IRQ_PRIORITY 5
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#endif
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/** @} */
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/*===========================================================================*/
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/* Derived constants and error checks. */
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/*===========================================================================*/
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#if STM32_ADC_USE_ADC1 && !STM32_HAS_ADC1
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#error "ADC1 not present in the selected device"
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#endif
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#if STM32_ADC_USE_ADC2 && !STM32_HAS_ADC2
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#error "ADC2 not present in the selected device"
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#endif
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#if STM32_ADC_USE_ADC3 && !STM32_HAS_ADC3
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#error "ADC3 not present in the selected device"
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#endif
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#if !STM32_ADC_USE_ADC1 && !STM32_ADC_USE_ADC2 && !STM32_ADC_USE_ADC3
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#error "ADC driver activated but no ADC peripheral assigned"
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#endif
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#if STM32_ADC_USE_ADC1 && \
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!STM32_DMA_IS_VALID_ID(STM32_ADC_ADC1_DMA_STREAM, STM32_ADC1_DMA_MSK)
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#error "invalid DMA stream associated to ADC1"
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#endif
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#if STM32_ADC_USE_ADC2 && \
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!STM32_DMA_IS_VALID_ID(STM32_ADC_ADC2_DMA_STREAM, STM32_ADC2_DMA_MSK)
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#error "invalid DMA stream associated to ADC2"
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#endif
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#if STM32_ADC_USE_ADC3 && \
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!STM32_DMA_IS_VALID_ID(STM32_ADC_ADC3_DMA_STREAM, STM32_ADC3_DMA_MSK)
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#error "invalid DMA stream associated to ADC3"
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#endif
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/* ADC clock related settings and checks.*/
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#if STM32_ADC_ADCPRE == ADC_CCR_ADCPRE_DIV2
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#define STM32_ADCCLK (STM32_PCLK2 / 2)
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#elif STM32_ADC_ADCPRE == ADC_CCR_ADCPRE_DIV4
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#define STM32_ADCCLK (STM32_PCLK2 / 4)
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#elif STM32_ADC_ADCPRE == ADC_CCR_ADCPRE_DIV6
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#define STM32_ADCCLK (STM32_PCLK2 / 6)
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#elif STM32_ADC_ADCPRE == ADC_CCR_ADCPRE_DIV8
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#define STM32_ADCCLK (STM32_PCLK2 / 8)
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#else
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#error "invalid STM32_ADC_ADCPRE value specified"
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#endif
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#if (STM32_ADCCLK < STM32_ADCCLK_MIN) || (STM32_ADCCLK > STM32_ADCCLK_MAX)
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#error "STM32_ADCCLK outside acceptable range (STM32_ADCCLK_MIN...STM32_ADCCLK_MAX)"
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#endif
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#if !defined(STM32_DMA_REQUIRED)
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#define STM32_DMA_REQUIRED
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#endif
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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 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 Type of a structure representing an ADC driver.
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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 ADC error 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] err ADC error code
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*/
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typedef void (*adcerrorcallback_t)(ADCDriver *adcp, adcerror_t err);
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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_t 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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/**
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* @brief Error callback or @p NULL.
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*/
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adcerrorcallback_t error_cb;
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/* End of the mandatory fields.*/
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/**
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* @brief ADC CR1 register initialization data.
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* @note All the required bits must be defined into this field except
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* @p ADC_CR1_SCAN that is enforced inside the driver.
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*/
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uint32_t cr1;
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/**
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* @brief ADC CR2 register initialization data.
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* @note All the required bits must be defined into this field except
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* @p ADC_CR2_DMA, @p ADC_CR2_CONT and @p ADC_CR2_ADON that are
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* enforced inside the driver.
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*/
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uint32_t cr2;
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/**
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* @brief ADC SMPR1 register initialization data.
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* @details In this field must be specified the sample times for channels
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* 10...18.
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*/
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uint32_t smpr1;
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/**
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* @brief ADC SMPR2 register initialization data.
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* @details In this field must be specified the sample times for channels
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* 0...9.
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*/
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uint32_t smpr2;
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/**
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* @brief ADC SQR1 register initialization data.
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* @details Conversion group sequence 13...16 + sequence length.
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*/
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uint32_t sqr1;
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/**
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* @brief ADC SQR2 register initialization data.
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* @details Conversion group sequence 7...12.
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*/
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uint32_t sqr2;
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/**
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* @brief ADC SQR3 register initialization data.
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* @details Conversion group sequence 1...6.
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*/
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uint32_t sqr3;
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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 *thread;
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#endif
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#if ADC_USE_MUTUAL_EXCLUSION || defined(__DOXYGEN__)
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#if CH_USE_MUTEXES || defined(__DOXYGEN__)
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/**
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* @brief Mutex protecting the peripheral.
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*/
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Mutex mutex;
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#elif CH_USE_SEMAPHORES
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Semaphore semaphore;
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#endif
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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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ADC_TypeDef *adc;
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/**
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* @brief Pointer to associated DMA channel.
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*/
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const stm32_dma_stream_t *dmastp;
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/**
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* @brief DMA mode bit mask.
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*/
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uint32_t dmamode;
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};
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/*===========================================================================*/
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/* Driver macros. */
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/*===========================================================================*/
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/**
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* @name Sequences building helper macros
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* @{
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*/
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/**
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* @brief Number of channels in a conversion sequence.
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*/
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#define ADC_SQR1_NUM_CH(n) (((n) - 1) << 20)
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#define ADC_SQR3_SQ1_N(n) ((n) << 0) /**< @brief 1st channel in seq. */
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#define ADC_SQR3_SQ2_N(n) ((n) << 5) /**< @brief 2nd channel in seq. */
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#define ADC_SQR3_SQ3_N(n) ((n) << 10) /**< @brief 3rd channel in seq. */
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#define ADC_SQR3_SQ4_N(n) ((n) << 15) /**< @brief 4th channel in seq. */
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#define ADC_SQR3_SQ5_N(n) ((n) << 20) /**< @brief 5th channel in seq. */
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#define ADC_SQR3_SQ6_N(n) ((n) << 25) /**< @brief 6th channel in seq. */
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#define ADC_SQR2_SQ7_N(n) ((n) << 0) /**< @brief 7th channel in seq. */
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#define ADC_SQR2_SQ8_N(n) ((n) << 5) /**< @brief 8th channel in seq. */
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#define ADC_SQR2_SQ9_N(n) ((n) << 10) /**< @brief 9th channel in seq. */
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#define ADC_SQR2_SQ10_N(n) ((n) << 15) /**< @brief 10th channel in seq.*/
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#define ADC_SQR2_SQ11_N(n) ((n) << 20) /**< @brief 11th channel in seq.*/
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#define ADC_SQR2_SQ12_N(n) ((n) << 25) /**< @brief 12th channel in seq.*/
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#define ADC_SQR1_SQ13_N(n) ((n) << 0) /**< @brief 13th channel in seq.*/
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#define ADC_SQR1_SQ14_N(n) ((n) << 5) /**< @brief 14th channel in seq.*/
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#define ADC_SQR1_SQ15_N(n) ((n) << 10) /**< @brief 15th channel in seq.*/
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#define ADC_SQR1_SQ16_N(n) ((n) << 15) /**< @brief 16th channel in seq.*/
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/** @} */
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/**
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* @name Sampling rate settings helper macros
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* @{
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*/
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#define ADC_SMPR2_SMP_AN0(n) ((n) << 0) /**< @brief AN0 sampling time. */
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#define ADC_SMPR2_SMP_AN1(n) ((n) << 3) /**< @brief AN1 sampling time. */
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#define ADC_SMPR2_SMP_AN2(n) ((n) << 6) /**< @brief AN2 sampling time. */
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#define ADC_SMPR2_SMP_AN3(n) ((n) << 9) /**< @brief AN3 sampling time. */
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#define ADC_SMPR2_SMP_AN4(n) ((n) << 12) /**< @brief AN4 sampling time. */
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#define ADC_SMPR2_SMP_AN5(n) ((n) << 15) /**< @brief AN5 sampling time. */
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#define ADC_SMPR2_SMP_AN6(n) ((n) << 18) /**< @brief AN6 sampling time. */
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#define ADC_SMPR2_SMP_AN7(n) ((n) << 21) /**< @brief AN7 sampling time. */
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#define ADC_SMPR2_SMP_AN8(n) ((n) << 24) /**< @brief AN8 sampling time. */
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#define ADC_SMPR2_SMP_AN9(n) ((n) << 27) /**< @brief AN9 sampling time. */
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#define ADC_SMPR1_SMP_AN10(n) ((n) << 0) /**< @brief AN10 sampling time. */
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#define ADC_SMPR1_SMP_AN11(n) ((n) << 3) /**< @brief AN11 sampling time. */
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#define ADC_SMPR1_SMP_AN12(n) ((n) << 6) /**< @brief AN12 sampling time. */
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#define ADC_SMPR1_SMP_AN13(n) ((n) << 9) /**< @brief AN13 sampling time. */
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#define ADC_SMPR1_SMP_AN14(n) ((n) << 12) /**< @brief AN14 sampling time. */
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#define ADC_SMPR1_SMP_AN15(n) ((n) << 15) /**< @brief AN15 sampling time. */
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#define ADC_SMPR1_SMP_SENSOR(n) ((n) << 18) /**< @brief Temperature Sensor
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sampling time. */
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#define ADC_SMPR1_SMP_VREF(n) ((n) << 21) /**< @brief Voltage Reference
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sampling time. */
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#define ADC_SMPR1_SMP_VBAT(n) ((n) << 24) /**< @brief VBAT sampling time. */
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/** @} */
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/*===========================================================================*/
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/* External declarations. */
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/*===========================================================================*/
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#if STM32_ADC_USE_ADC1 && !defined(__DOXYGEN__)
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extern ADCDriver ADCD1;
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#endif
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#if STM32_ADC_USE_ADC2 && !defined(__DOXYGEN__)
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extern ADCDriver ADCD2;
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#endif
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#if STM32_ADC_USE_ADC3 && !defined(__DOXYGEN__)
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extern ADCDriver ADCD3;
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#endif
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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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void adc_lld_stop_conversion(ADCDriver *adcp);
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void adcSTM32EnableTSVREFE(void);
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void adcSTM32DisableTSVREFE(void);
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void adcSTM32EnableVBATE(void);
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void adcSTM32DisableVBATE(void);
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#ifdef __cplusplus
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}
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#endif
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#endif /* HAL_USE_ADC */
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#endif /* _ADC_LLD_H_ */
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/** @} */
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