From 5ed2f28ec0e5031ab79b50f6c61964273023567e Mon Sep 17 00:00:00 2001 From: gdisirio Date: Wed, 16 Nov 2011 17:45:07 +0000 Subject: git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@3498 35acf78f-673a-0410-8e92-d51de3d6d3f4 --- os/hal/platforms/STM32F4xx/adc_lld.c | 378 +++++++++++++++++++++++ os/hal/platforms/STM32F4xx/adc_lld.h | 567 +++++++++++++++++++++++++++++++++++ 2 files changed, 945 insertions(+) create mode 100644 os/hal/platforms/STM32F4xx/adc_lld.c create mode 100644 os/hal/platforms/STM32F4xx/adc_lld.h diff --git a/os/hal/platforms/STM32F4xx/adc_lld.c b/os/hal/platforms/STM32F4xx/adc_lld.c new file mode 100644 index 000000000..f78c7ac0f --- /dev/null +++ b/os/hal/platforms/STM32F4xx/adc_lld.c @@ -0,0 +1,378 @@ +/* + ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010, + 2011 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 STM32F4xx/adc_lld.c + * @brief STM32F4xx ADC subsystem low level driver source. + * + * @addtogroup ADC + * @{ + */ + +#include "ch.h" +#include "hal.h" + +#if HAL_USE_ADC || defined(__DOXYGEN__) + +/*===========================================================================*/ +/* Driver local definitions. */ +/*===========================================================================*/ + +#define ADC1_DMA_CHANNEL \ + STM32_DMA_GETCHANNEL(STM32_ADC_ADC1_DMA_STREAM, STM32_ADC1_DMA_CHN) + +#define ADC2_DMA_CHANNEL \ + STM32_DMA_GETCHANNEL(STM32_ADC_ADC2_DMA_STREAM, STM32_ADC2_DMA_CHN) + +#define ADC3_DMA_CHANNEL \ + STM32_DMA_GETCHANNEL(STM32_ADC_ADC3_DMA_STREAM, STM32_ADC3_DMA_CHN) + +/*===========================================================================*/ +/* Driver exported variables. */ +/*===========================================================================*/ + +/** @brief ADC1 driver identifier.*/ +#if STM32_ADC_USE_ADC1 || defined(__DOXYGEN__) +ADCDriver ADCD1; +#endif + +/** @brief ADC2 driver identifier.*/ +#if STM32_ADC_USE_ADC2 || defined(__DOXYGEN__) +ADCDriver ADCD2; +#endif + +/** @brief ADC3 driver identifier.*/ +#if STM32_ADC_USE_ADC3 || defined(__DOXYGEN__) +ADCDriver ADCD3; +#endif + +/*===========================================================================*/ +/* Driver local variables. */ +/*===========================================================================*/ + +/*===========================================================================*/ +/* Driver local functions. */ +/*===========================================================================*/ + +/** + * @brief ADC DMA ISR service routine. + * + * @param[in] adcp pointer to the @p ADCDriver object + * @param[in] flags pre-shifted content of the ISR register + */ +static void adc_lld_serve_rx_interrupt(ADCDriver *adcp, uint32_t flags) { + + /* DMA errors handling.*/ + if ((flags & STM32_DMA_ISR_TEIF) != 0) { + /* DMA, this could help only if the DMA tries to access an unmapped + address space or violates alignment rules.*/ + _adc_isr_error_code(adcp, ADC_ERR_DMAFAILURE); + } + else { + if ((flags & STM32_DMA_ISR_HTIF) != 0) { + /* Half transfer processing.*/ + _adc_isr_half_code(adcp); + } + if ((flags & STM32_DMA_ISR_TCIF) != 0) { + /* Transfer complete processing.*/ + _adc_isr_full_code(adcp); + } + } +} + +/*===========================================================================*/ +/* Driver interrupt handlers. */ +/*===========================================================================*/ + +#if STM32_ADC_USE_ADC1 || STM32_ADC_USE_ADC2 || STM32_ADC_USE_ADC3 || \ + defined(__DOXYGEN__) +/** + * @brief ADC interrupt handler. + * + * @isr + */ +CH_IRQ_HANDLER(ADC1_2_3_IRQHandler) { + uint32_t sr; + + CH_IRQ_PROLOGUE(); + +#if STM32_ADC_USE_ADC1 + sr = ADC1->SR; + ADC1->SR = 0; + if (sr & ADC_SR_OVR) { + /* ADC overflow condition, this could happen only if the DMA is unable + to read data fast enough.*/ + _adc_isr_error_code(&ADCD1, ADC_ERR_OVERFLOW); + } + /* TODO: Add here analog watchdog handling.*/ +#endif /* STM32_ADC_USE_ADC1 */ + +#if STM32_ADC_USE_ADC2 + sr = ADC2->SR; + ADC2->SR = 0; + if (sr & ADC_SR_OVR) { + /* ADC overflow condition, this could happen only if the DMA is unable + to read data fast enough.*/ + _adc_isr_error_code(&ADCD2, ADC_ERR_OVERFLOW); + } + /* TODO: Add here analog watchdog handling.*/ +#endif /* STM32_ADC_USE_ADC2 */ + +#if STM32_ADC_USE_ADC3 + sr = ADC3->SR; + ADC3->SR = 0; + if (sr & ADC_SR_OVR) { + /* ADC overflow condition, this could happen only if the DMA is unable + to read data fast enough.*/ + _adc_isr_error_code(&ADCD3, ADC_ERR_OVERFLOW); + } + /* TODO: Add here analog watchdog handling.*/ +#endif /* STM32_ADC_USE_ADC3 */ + + CH_IRQ_EPILOGUE(); +} +#endif + +/*===========================================================================*/ +/* Driver exported functions. */ +/*===========================================================================*/ + +/** + * @brief Low level ADC driver initialization. + * + * @notapi + */ +void adc_lld_init(void) { + + ADC->CCR = STM32_ADC_ADCPRE; + +#if STM32_ADC_USE_ADC1 + /* Driver initialization.*/ + adcObjectInit(&ADCD1); + ADCD1.adc = ADC1; + ADCD1.dmastp = STM32_DMA_STREAM(STM32_ADC_ADC1_DMA_STREAM); + ADCD1.dmamode = STM32_DMA_CR_CHSEL(ADC1_DMA_CHANNEL) | + STM32_DMA_CR_PL(STM32_ADC_ADC1_DMA_PRIORITY) | + STM32_DMA_CR_MSIZE_HWORD | STM32_DMA_CR_PSIZE_HWORD | + STM32_DMA_CR_MINC | STM32_DMA_CR_TCIE | + STM32_DMA_CR_TEIE | STM32_DMA_CR_EN; +#endif + +#if STM32_ADC_USE_ADC2 + /* Driver initialization.*/ + adcObjectInit(&ADCD2); + ADCD1.adc = ADC2; + ADCD1.dmastp = STM32_DMA_STREAM(STM32_ADC_ADC2_DMA_STREAM); + ADCD1.dmamode = STM32_DMA_CR_CHSEL(ADC2_DMA_CHANNEL) | + STM32_DMA_CR_PL(STM32_ADC_ADC2_DMA_PRIORITY) | + STM32_DMA_CR_MSIZE_HWORD | STM32_DMA_CR_PSIZE_HWORD | + STM32_DMA_CR_MINC | STM32_DMA_CR_TCIE | + STM32_DMA_CR_TEIE | STM32_DMA_CR_EN; +#endif + +#if STM32_ADC_USE_ADC3 + /* Driver initialization.*/ + adcObjectInit(&ADCD3); + ADCD1.adc = ADC3; + ADCD1.dmastp = STM32_DMA_STREAM(STM32_ADC_ADC3_DMA_STREAM); + ADCD1.dmamode = STM32_DMA_CR_CHSEL(ADC3_DMA_CHANNEL) | + STM32_DMA_CR_PL(STM32_ADC_ADC3_DMA_PRIORITY) | + STM32_DMA_CR_MSIZE_HWORD | STM32_DMA_CR_PSIZE_HWORD | + STM32_DMA_CR_MINC | STM32_DMA_CR_TCIE | + STM32_DMA_CR_TEIE | STM32_DMA_CR_EN; +#endif + + /* The shared vector is initialized on driver initialization and never + disabled.*/ + NVICEnableVector(ADC_IRQn, CORTEX_PRIORITY_MASK(STM32_ADC_IRQ_PRIORITY)); +} + +/** + * @brief Configures and activates the ADC peripheral. + * + * @param[in] adcp pointer to the @p ADCDriver object + * + * @notapi + */ +void adc_lld_start(ADCDriver *adcp) { + + /* If in stopped state then enables the ADC and DMA clocks.*/ + if (adcp->state == ADC_STOP) { +#if STM32_ADC_USE_ADC1 + if (&ADCD1 == adcp) { + bool_t b; + b = dmaStreamAllocate(adcp->dmastp, + STM32_ADC_ADC1_DMA_IRQ_PRIORITY, + (stm32_dmaisr_t)adc_lld_serve_rx_interrupt, + (void *)adcp); + chDbgAssert(!b, "adc_lld_start(), #1", "stream already allocated"); + dmaStreamSetPeripheral(adcp->dmastp, &ADC1->DR); + rccEnableADC1(FALSE); + } +#endif /* STM32_ADC_USE_ADC1 */ + +#if STM32_ADC_USE_ADC2 + if (&ADCD2 == adcp) { + bool_t b; + b = dmaStreamAllocate(adcp->dmastp, + STM32_ADC_ADC2_DMA_IRQ_PRIORITY, + (stm32_dmaisr_t)adc_lld_serve_rx_interrupt, + (void *)adcp); + chDbgAssert(!b, "adc_lld_start(), #2", "stream already allocated"); + dmaStreamSetPeripheral(adcp->dmastp, &ADC2->DR); + rccEnableADC2(FALSE); + } +#endif /* STM32_ADC_USE_ADC2 */ + +#if STM32_ADC_USE_ADC3 + if (&ADCD3 == adcp) { + bool_t b; + b = dmaStreamAllocate(adcp->dmastp, + STM32_ADC_ADC3_DMA_IRQ_PRIORITY, + (stm32_dmaisr_t)adc_lld_serve_rx_interrupt, + (void *)adcp); + chDbgAssert(!b, "adc_lld_start(), #3", "stream already allocated"); + dmaStreamSetPeripheral(adcp->dmastp, &ADC3->DR); + rccEnableADC3(FALSE); + } +#endif /* STM32_ADC_USE_ADC3 */ + + /* ADC initial setup, just resetting control registers in this case.*/ + adcp->adc->CR1 = 0; + adcp->adc->CR2 = 0; + } +} + +/** + * @brief Deactivates the ADC peripheral. + * + * @param[in] adcp pointer to the @p ADCDriver object + * + * @notapi + */ +void adc_lld_stop(ADCDriver *adcp) { + + /* If in ready state then disables the ADC clock.*/ + if (adcp->state == ADC_READY) { + dmaStreamRelease(adcp->dmastp); + adcp->adc->CR1 = 0; + adcp->adc->CR2 = 0; + +#if STM32_ADC_USE_ADC1 + if (&ADCD1 == adcp) + rccDisableADC1(FALSE); +#endif + +#if STM32_ADC_USE_ADC2 + if (&ADCD2 == adcp) + rccDisableADC2(FALSE); +#endif + +#if STM32_ADC_USE_ADC3 + if (&ADCD3 == adcp) + rccDisableADC3(FALSE); +#endif + } +} + +/** + * @brief Starts an ADC conversion. + * + * @param[in] adcp pointer to the @p ADCDriver object + * + * @notapi + */ +void adc_lld_start_conversion(ADCDriver *adcp) { + uint32_t mode; + const ADCConversionGroup *grpp = adcp->grpp; + + /* DMA setup.*/ + mode = adcp->dmamode; + if (grpp->circular) { + mode |= STM32_DMA_CR_CIRC; + } + if (adcp->depth > 1) { + /* If the buffer depth is greater than one then the half transfer interrupt + interrupt is enabled in order to allows streaming processing.*/ + mode |= STM32_DMA_CR_HTIE; + } + dmaStreamSetMemory0(adcp->dmastp, adcp->samples); + dmaStreamSetTransactionSize(adcp->dmastp, (uint32_t)grpp->num_channels * + (uint32_t)adcp->depth); + dmaStreamSetMode(adcp->dmastp, mode); + + /* ADC setup.*/ + adcp->adc->SR = 0; + adcp->adc->CR1 = grpp->cr1 | ADC_CR1_OVRIE | ADC_CR1_SCAN; + adcp->adc->SMPR1 = grpp->smpr1; /* Writing SMPRx requires ADON=0. */ + adcp->adc->SMPR2 = grpp->smpr2; + adcp->adc->CR2 = grpp->cr2 | ADC_CR2_CONT | ADC_CR2_DMA | ADC_CR2_DDS | + ADC_CR2_ADON; + adcp->adc->SQR1 = grpp->sqr1; + adcp->adc->SQR2 = grpp->sqr2; + adcp->adc->SQR3 = grpp->sqr3; + /* Must wait the ADC to be ready for conversion, see 9.3.6 "Timing diagram" + in the Reference Manual.*/ + while ((adcp->adc->SR & ADC_SR_ADONS) == 0) + ; + /* ADC start by raising ADC_CR2_SWSTART.*/ + adcp->adc->CR2 = grpp->cr2 | ADC_CR2_SWSTART | ADC_CR2_CONT | ADC_CR2_DMA | + ADC_CR2_DDS | ADC_CR2_ADON; +} + +/** + * @brief Stops an ongoing conversion. + * + * @param[in] adcp pointer to the @p ADCDriver object + * + * @notapi + */ +void adc_lld_stop_conversion(ADCDriver *adcp) { + + dmaStreamDisable(adcp->dmastp); + adcp->adc->CR1 = 0; + adcp->adc->CR2 = 0; +} + +/** + * @brief Enables the TSVREFE bit. + * @details The TSVREFE bit is required in order to sample the internal + * temperature sensor and internal reference voltage. + * @note This is an STM32-only functionality. + */ +void adcSTM32EnableTSVREFE(void) { + + ADC->CCR |= ADC_CCR_TSVREFE; +} + +/** + * @brief Disables the TSVREFE bit. + * @details The TSVREFE bit is required in order to sample the internal + * temperature sensor and internal reference voltage. + * @note This is an STM32-only functionality. + */ +void adcSTM32DisableTSVREFE(void) { + + ADC->CCR &= ~ADC_CCR_TSVREFE; +} + +#endif /* HAL_USE_ADC */ + +/** @} */ diff --git a/os/hal/platforms/STM32F4xx/adc_lld.h b/os/hal/platforms/STM32F4xx/adc_lld.h new file mode 100644 index 000000000..0e846f50a --- /dev/null +++ b/os/hal/platforms/STM32F4xx/adc_lld.h @@ -0,0 +1,567 @@ +/* + ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010, + 2011 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 STM32F4xx/adc_lld.h + * @brief STM32F4xx ADC subsystem low level driver header. + * + * @addtogroup ADC + * @{ + */ + +#ifndef _ADC_LLD_H_ +#define _ADC_LLD_H_ + +#if HAL_USE_ADC || defined(__DOXYGEN__) + +/*===========================================================================*/ +/* Driver constants. */ +/*===========================================================================*/ + +/** + * @name Absolute Maximum Ratings + * @{ + */ +/** + * @brief Maximum HSE clock frequency. + */ +#define STM32_ADCCLK_MIN 600000 + +/** + * @brief Maximum HSE clock frequency. + * @note This value is arbitrary defined, the current datasheet does not + * define a maximum value (it is TBD). A value of 36MHz is mentioned + * but without relationship to VDD ranges. + */ +#define STM32_ADCCLK_MAX 42000000 +/** @} */ + +/** + * @name Triggers selection + * @{ + */ +#define ADC_CR2_EXTSEL_SRC(n) ((n) << 24) /**< @brief Trigger source. */ +/** @} */ + +/** + * @name ADC clock divider settings + * @{ + */ +#define ADC_CCR_ADCPRE_DIV2 0 +#define ADC_CCR_ADCPRE_DIV4 1 +#define ADC_CCR_ADCPRE_DIV6 2 +#define ADC_CCR_ADCPRE_DIV8 3 +/** @} */ + +/** + * @name Available analog channels + * @{ + */ +#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. + @note Available onADC1 only. */ +#define ADC_CHANNEL_VREFINT 17 /**< @brief Internal reference. + @note Available onADC1 only. */ +#define ADC_CHANNEL_VBAT 18 /**< @brief VBAT. + @note Available onADC1 only. */ +/** @} */ + +/** + * @name Sampling rates + * @{ + */ +#define ADC_SAMPLE_3 0 /**< @brief 3 cycles sampling time. */ +#define ADC_SAMPLE_15 1 /**< @brief 15 cycles sampling time. */ +#define ADC_SAMPLE_28 2 /**< @brief 28 cycles sampling time. */ +#define ADC_SAMPLE_56 3 /**< @brief 56 cycles sampling time. */ +#define ADC_SAMPLE_84 4 /**< @brief 84 cycles sampling time. */ +#define ADC_SAMPLE_112 5 /**< @brief 112 cycles sampling time. */ +#define ADC_SAMPLE_144 6 /**< @brief 144 cycles sampling time. */ +#define ADC_SAMPLE_480 7 /**< @brief 480 cycles sampling time. */ +/** @} */ + +/*===========================================================================*/ +/* Driver pre-compile time settings. */ +/*===========================================================================*/ + +/** + * @name Configuration options + * @{ + */ +/** + * @brief ADC common clock divider. + * @note This setting is influenced by the VDDA voltage and other + * external conditions, please refer to the STM32L15x datasheet + * for more info.
+ * See section 6.3.15 "12-bit ADC characteristics". + */ +#if !defined(STM32_ADC_ADCPRE) || defined(__DOXYGEN__) +#define STM32_ADC_ADCPRE ADC_CCR_ADCPRE_DIV2 +#endif + +/** + * @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 ADC2 driver enable switch. + * @details If set to @p TRUE the support for ADC2 is included. + * @note The default is @p TRUE. + */ +#if !defined(STM32_ADC_USE_ADC2) || defined(__DOXYGEN__) +#define STM32_ADC_USE_ADC2 TRUE +#endif + +/** + * @brief ADC3 driver enable switch. + * @details If set to @p TRUE the support for ADC3 is included. + * @note The default is @p TRUE. + */ +#if !defined(STM32_ADC_USE_ADC3) || defined(__DOXYGEN__) +#define STM32_ADC_USE_ADC3 TRUE +#endif + +/** + * @brief DMA stream used for ADC1 operations. + */ +#if !defined(STM32_ADC_ADC1_DMA_STREAM) || defined(__DOXYGEN__) +#define STM32_ADC_ADC1_DMA_STREAM STM32_DMA_STREAM_ID(2, 4) +#endif + +/** + * @brief DMA stream used for ADC2 operations. + */ +#if !defined(STM32_ADC_ADC2_DMA_STREAM) || defined(__DOXYGEN__) +#define STM32_ADC_ADC2_DMA_STREAM STM32_DMA_STREAM_ID(2, 2) +#endif + +/** + * @brief DMA stream used for ADC3 operations. + */ +#if !defined(STM32_ADC_ADC3_DMA_STREAM) || defined(__DOXYGEN__) +#define STM32_ADC_ADC3_DMA_STREAM STM32_DMA_STREAM_ID(2, 1) +#endif + +/** + * @brief ADC1 DMA priority (0..3|lowest..highest). + */ +#if !defined(STM32_ADC_ADC1_DMA_PRIORITY) || defined(__DOXYGEN__) +#define STM32_ADC_ADC1_DMA_PRIORITY 2 +#endif + +/** + * @brief ADC2 DMA priority (0..3|lowest..highest). + */ +#if !defined(STM32_ADC_ADC2_DMA_PRIORITY) || defined(__DOXYGEN__) +#define STM32_ADC_ADC2_DMA_PRIORITY 2 +#endif + +/** + * @brief ADC3 DMA priority (0..3|lowest..highest). + */ +#if !defined(STM32_ADC_ADC3_DMA_PRIORITY) || defined(__DOXYGEN__) +#define STM32_ADC_ADC3_DMA_PRIORITY 2 +#endif + +/** + * @brief ADC interrupt priority level setting. + * @note This setting is shared among ADC1, ADC2 and ADC3 because + * all ADCs share the same vector. + */ +#if !defined(STM32_ADC_IRQ_PRIORITY) || defined(__DOXYGEN__) +#define STM32_ADC_IRQ_PRIORITY 5 +#endif + +/** + * @brief ADC1 DMA interrupt priority level setting. + */ +#if !defined(STM32_ADC_ADC1_DMA_IRQ_PRIORITY) || defined(__DOXYGEN__) +#define STM32_ADC_ADC1_DMA_IRQ_PRIORITY 5 +#endif + +/** + * @brief ADC2 DMA interrupt priority level setting. + */ +#if !defined(STM32_ADC_ADC2_DMA_IRQ_PRIORITY) || defined(__DOXYGEN__) +#define STM32_ADC_ADC2_DMA_IRQ_PRIORITY 5 +#endif + +/** + * @brief ADC3 DMA interrupt priority level setting. + */ +#if !defined(STM32_ADC_ADC3_DMA_IRQ_PRIORITY) || defined(__DOXYGEN__) +#define STM32_ADC_ADC3_DMA_IRQ_PRIORITY 5 +#endif + +/** @} */ + +/*===========================================================================*/ +/* Derived constants and error checks. */ +/*===========================================================================*/ + +#if STM32_ADC_USE_ADC1 && !STM32_HAS_ADC1 +#error "ADC1 not present in the selected device" +#endif + +#if STM32_ADC_USE_ADC2 && !STM32_HAS_ADC2 +#error "ADC2 not present in the selected device" +#endif + +#if STM32_ADC_USE_ADC3 && !STM32_HAS_ADC3 +#error "ADC3 not present in the selected device" +#endif + +#if !STM32_ADC_USE_ADC1 && !STM32_ADC_USE_ADC2 && !STM32_ADC_USE_ADC3 +#error "ADC driver activated but no ADC peripheral assigned" +#endif + +#if STM32_ADC_USE_ADC1 && \ + !STM32_DMA_IS_VALID_ID(STM32_ADC_ADC1_DMA_STREAM, STM32_ADC1_DMA_MSK) +#error "invalid DMA stream associated to ADC1" +#endif + +#if STM32_ADC_USE_ADC2 && \ + !STM32_DMA_IS_VALID_ID(STM32_ADC_ADC2_DMA_STREAM, STM32_ADC2_DMA_MSK) +#error "invalid DMA stream associated to ADC2" +#endif + +#if STM32_ADC_USE_ADC3 && \ + !STM32_DMA_IS_VALID_ID(STM32_ADC_ADC3_DMA_STREAM, STM32_ADC3_DMA_MSK) +#error "invalid DMA stream associated to ADC3" +#endif + +/* ADC clock related settings and checks.*/ +#if STM32_ADC_ADCPRE == ADC_CCR_ADCPRE_DIV2 +#define STM32_ADCCLK (STM32_PCLK2 / 2) +#elif STM32_ADC_ADCPRE == ADC_CCR_ADCPRE_DIV4 +#define STM32_ADCCLK (STM32_PCLK2 / 4) +#elif STM32_ADC_ADCPRE == ADC_CCR_ADCPRE_DIV6 +#define STM32_ADCCLK (STM32_PCLK2 / 6) +#elif STM32_ADC_ADCPRE == ADC_CCR_ADCPRE_DIV8 +#define STM32_ADCCLK (STM32_PCLK2 / 8) +#else +#error "invalid STM32_ADC_ADCPRE value specified" +#endif + +#if (STM32_ADCCLK < STM32_ADCCLK_MIN) || (STM32_ADCCLK > STM32_ADCCLK_MAX) +#error "STM32_ADCCLK outside acceptable range (STM32_ADCCLK_MIN...STM32_ADCCLK_MAX)" +#endif + +#if !defined(STM32_DMA_REQUIRED) +#define STM32_DMA_REQUIRED +#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 Possible ADC failure causes. + * @note Error codes are architecture dependent and should not relied + * upon. + */ +typedef enum { + ADC_ERR_DMAFAILURE = 0, /**< DMA operations failure. */ + ADC_ERR_OVERFLOW = 1 /**< ADC overflow condition. */ +} adcerror_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 ADC error callback type. + * + * @param[in] adcp pointer to the @p ADCDriver object triggering the + * callback + */ +typedef void (*adcerrorcallback_t)(ADCDriver *adcp, adcerror_t err); + +/** + * @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 circular; + /** + * @brief Number of the analog channels belonging to the conversion group. + */ + adc_channels_num_t num_channels; + /** + * @brief Callback function associated to the group or @p NULL. + */ + adccallback_t end_cb; + /** + * @brief Error callback or @p NULL. + */ + adcerrorcallback_t error_cb; + /* 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 cr1; + /** + * @brief ADC CR2 register initialization data. + * @note All the required bits must be defined into this field except + * @p ADC_CR2_DMA, @p ADC_CR2_CONT and @p ADC_CR2_ADON that are + * enforced inside the driver. + */ + uint32_t cr2; + /** + * @brief ADC SMPR1 register initialization data. + * @details In this field must be specified the sample times for channels + * 10...18. + */ + uint32_t smpr1; + /** + * @brief ADC SMPR2 register initialization data. + * @details In this field must be specified the sample times for channels + * 0...9. + */ + uint32_t smpr2; + /** + * @brief ADC SQR1 register initialization data. + * @details Conversion group sequence 13...16 + sequence length. + */ + uint32_t sqr1; + /** + * @brief ADC SQR2 register initialization data. + * @details Conversion group sequence 7...12. + */ + uint32_t sqr2; + /** + * @brief ADC SQR3 register initialization data. + * @details Conversion group sequence 1...6. + */ + uint32_t sqr3; +} ADCConversionGroup; + +/** + * @brief Driver configuration structure. + * @note It could be empty on some architectures. + */ +typedef struct { + uint32_t dummy; +} ADCConfig; + +/** + * @brief Structure representing an ADC driver. + */ +struct ADCDriver { + /** + * @brief Driver state. + */ + adcstate_t state; + /** + * @brief Current configuration data. + */ + const ADCConfig *config; + /** + * @brief Current samples buffer pointer or @p NULL. + */ + adcsample_t *samples; + /** + * @brief Current samples buffer depth or @p 0. + */ + size_t depth; + /** + * @brief Current conversion group pointer or @p NULL. + */ + const ADCConversionGroup *grpp; +#if ADC_USE_WAIT || defined(__DOXYGEN__) + /** + * @brief Waiting thread. + */ + Thread *thread; +#endif +#if ADC_USE_MUTUAL_EXCLUSION || defined(__DOXYGEN__) +#if CH_USE_MUTEXES || defined(__DOXYGEN__) + /** + * @brief Mutex protecting the peripheral. + */ + Mutex mutex; +#elif CH_USE_SEMAPHORES + Semaphore 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 *adc; + /** + * @brief Pointer to associated SMA channel. + */ + const stm32_dma_stream_t *dmastp; + /** + * @brief DMA mode bit mask. + */ + uint32_t dmamode; +}; + +/*===========================================================================*/ +/* Driver macros. */ +/*===========================================================================*/ + +/** + * @name Sequences building helper macros + * @{ + */ +/** + * @brief Number of channels in a conversion sequence. + */ +#define ADC_SQR1_NUM_CH(n) (((n) - 1) << 20) + +#define ADC_SQR3_SQ1_N(n) ((n) << 0) /**< @brief 1st channel in seq. */ +#define ADC_SQR3_SQ2_N(n) ((n) << 5) /**< @brief 2nd channel in seq. */ +#define ADC_SQR3_SQ3_N(n) ((n) << 10) /**< @brief 3rd channel in seq. */ +#define ADC_SQR3_SQ4_N(n) ((n) << 15) /**< @brief 4th channel in seq. */ +#define ADC_SQR3_SQ5_N(n) ((n) << 20) /**< @brief 5th channel in seq. */ +#define ADC_SQR3_SQ6_N(n) ((n) << 25) /**< @brief 6th channel in seq. */ + +#define ADC_SQR2_SQ7_N(n) ((n) << 0) /**< @brief 7th channel in seq. */ +#define ADC_SQR2_SQ8_N(n) ((n) << 5) /**< @brief 8th channel in seq. */ +#define ADC_SQR2_SQ9_N(n) ((n) << 10) /**< @brief 9th channel in seq. */ +#define ADC_SQR2_SQ10_N(n) ((n) << 15) /**< @brief 10th channel in seq.*/ +#define ADC_SQR2_SQ11_N(n) ((n) << 20) /**< @brief 11th channel in seq.*/ +#define ADC_SQR2_SQ12_N(n) ((n) << 25) /**< @brief 12th channel in seq.*/ + +#define ADC_SQR1_SQ13_N(n) ((n) << 0) /**< @brief 13th channel in seq.*/ +#define ADC_SQR1_SQ14_N(n) ((n) << 5) /**< @brief 14th channel in seq.*/ +#define ADC_SQR1_SQ15_N(n) ((n) << 10) /**< @brief 15th channel in seq.*/ +#define ADC_SQR1_SQ16_N(n) ((n) << 15) /**< @brief 16th channel in seq.*/ +/** @} */ + +/** + * @name Sampling rate settings helper macros + * @{ + */ +#define ADC_SMPR2_SMP_AN0(n) ((n) << 0) /**< @brief AN0 sampling time. */ +#define ADC_SMPR2_SMP_AN1(n) ((n) << 3) /**< @brief AN1 sampling time. */ +#define ADC_SMPR2_SMP_AN2(n) ((n) << 6) /**< @brief AN2 sampling time. */ +#define ADC_SMPR2_SMP_AN3(n) ((n) << 9) /**< @brief AN3 sampling time. */ +#define ADC_SMPR2_SMP_AN4(n) ((n) << 12) /**< @brief AN4 sampling time. */ +#define ADC_SMPR2_SMP_AN5(n) ((n) << 15) /**< @brief AN5 sampling time. */ +#define ADC_SMPR2_SMP_AN6(n) ((n) << 18) /**< @brief AN6 sampling time. */ +#define ADC_SMPR2_SMP_AN7(n) ((n) << 21) /**< @brief AN7 sampling time. */ +#define ADC_SMPR2_SMP_AN8(n) ((n) << 24) /**< @brief AN8 sampling time. */ +#define ADC_SMPR2_SMP_AN9(n) ((n) << 27) /**< @brief AN9 sampling time. */ + +#define ADC_SMPR1_SMP_AN10(n) ((n) << 0) /**< @brief AN10 sampling time. */ +#define ADC_SMPR1_SMP_AN11(n) ((n) << 3) /**< @brief AN11 sampling time. */ +#define ADC_SMPR1_SMP_AN12(n) ((n) << 6) /**< @brief AN12 sampling time. */ +#define ADC_SMPR1_SMP_AN13(n) ((n) << 9) /**< @brief AN13 sampling time. */ +#define ADC_SMPR1_SMP_AN14(n) ((n) << 12) /**< @brief AN14 sampling time. */ +#define ADC_SMPR1_SMP_AN15(n) ((n) << 15) /**< @brief AN15 sampling time. */ +#define ADC_SMPR1_SMP_SENSOR(n) ((n) << 18) /**< @brief Temperature Sensor + sampling time. */ +#define ADC_SMPR1_SMP_VREF(n) ((n) << 21) /**< @brief Voltage Reference + sampling time. */ +#define ADC_SMPR1_SMP_VBAT(n) ((n) << 24) /**< @brief VBAT sampling time. */ +/** @} */ + +/*===========================================================================*/ +/* External declarations. */ +/*===========================================================================*/ + +#if STM32_ADC_USE_ADC1 && !defined(__DOXYGEN__) +extern ADCDriver ADCD1; +#endif + +#if STM32_ADC_USE_ADC2 && !defined(__DOXYGEN__) +extern ADCDriver ADCD2; +#endif + +#if STM32_ADC_USE_ADC3 && !defined(__DOXYGEN__) +extern ADCDriver ADCD3; +#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); + void adcSTM32EnableTSVREFE(void); + void adcSTM32DisableTSVREFE(void); +#ifdef __cplusplus +} +#endif + +#endif /* HAL_USE_ADC */ + +#endif /* _ADC_LLD_H_ */ + +/** @} */ -- cgit v1.2.3