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@TaterLi4周前

04/2
15:12
技术控

STM32 ADC三重采样的坑

三重采样很简单,就是三个ADC叠加成更高速度,但是不是所有通道都支持三重采样.如图,只有写着ADC123_INx的才可以.

当初改掉原来官方的ADC1 + ADC2接PA4结果什么用都没,真是麻烦.另外只能按照WORD传输.进入DMA中断后要赶紧处理数据.取出高16和低16位.这个三重下,顺序是比较复杂(其实也就是先来后到),不过实际上不用管,当做只有一个ADC在工作就好了.

        aADCxMultimodeDualMasterConvertedData[tmp_index] = (uint16_t) __LL_ADC_MULTI_CONV_DATA_MASTER_SLAVE(LL_ADC_MULTI_MASTER, aADCxADCyMultimodeDualConvertedData[tmp_index]);
aADCyMultimodeDualSlaveConvertedData[tmp_index]  = (uint16_t) __LL_ADC_MULTI_CONV_DATA_MASTER_SLAVE(LL_ADC_MULTI_SLAVE, aADCxADCyMultimodeDualConvertedData[tmp_index]);

得到数据该怎么处理就怎么处理,这么快速度,串口是发不走的了,因为串口至少得144000000bps,不太可能,看看怎么送出去了,这数据.或者处理.

/**
******************************************************************************
* @file    Examples_LL/ADC/ADC_MultimodeDualInterleaved/Src/main.c
* @author  MCD Application Team
* @version V1.0.0
* @date    30-December-2016
* @brief   This example describes how to use several ADC peripherals in
*          multimode, mode interleaved.
*          ADC master instance synchronizes and manages ADC slave instance.
*          Multimode interleaved combines ADC instances to convert
*          the same channel and increase the overall ADC conversion rate.
*          This example configures the ADC to perform conversions at the
*          maximum ADC conversion rate possible (with a sampling time
*          corresponding to ADC resolution 12 bits).
*          This example is based on the STM32F7xx ADC LL API;
*          Peripheral initialization done using LL unitary services functions.
******************************************************************************
* @attention
*
* <h2><center>© COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*   1. Redistributions of source code must retain the above copyright notice,
*      this list of conditions and the following disclaimer.
*   2. Redistributions in binary form must reproduce the above copyright notice,
*      this list of conditions and the following disclaimer in the documentation
*      and/or other materials provided with the distribution.
*   3. Neither the name of STMicroelectronics nor the names of its contributors
*      may be used to endorse or promote products derived from this software
*      without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "main.h"
/** @addtogroup STM32F7xx_LL_Examples
* @{
*/
/** @addtogroup ADC_MultimodeDualInterleaved
* @{
*/
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Definitions of ADC hardware constraints delays */
/* Note: Only ADC IP HW delays are defined in ADC LL driver driver,           */
/*       not timeout values:                                                  */
/*       Timeout values for ADC operations are dependent to device clock      */
/*       configuration (system clock versus ADC clock),                       */
/*       and therefore must be defined in user application.                   */
/*       Refer to @ref ADC_LL_EC_HW_DELAYS for description of ADC timeout     */
/*       values definition.                                                   */
/* Timeout values for ADC operations. */
/* (enable settling time, disable settling time, ...)                       */
/* Values defined to be higher than worst cases: low clock frequency,       */
/* maximum prescalers.                                                      */
/* Example of profile very low frequency : ADC clock frequency 36MHz        */
/* prescaler 2, sampling time 56 ADC clock cycles, resolution 12 bits.      */
/*  - ADC enable time: maximum delay is 3 us                                */
/*    (refer to device datasheet, parameter "tSTAB")                        */
/*  - ADC disable time: maximum delay should be a few ADC clock cycles      */
/*  - ADC stop conversion time: maximum delay should be a few ADC clock     */
/*    cycles                                                                */
/*  - ADC conversion time: with this hypothesis of clock settings, maximum  */
/*    delay will be 99us.                                                   */
/*    (refer to device reference manual, section "Timing")                  */
/* Unit: ms                                                                 */
#define ADC_CALIBRATION_TIMEOUT_MS       ((uint32_t)   1)
#define ADC_ENABLE_TIMEOUT_MS            ((uint32_t)   1)
#define ADC_DISABLE_TIMEOUT_MS           ((uint32_t)   1)
#define ADC_STOP_CONVERSION_TIMEOUT_MS   ((uint32_t)   1)
#define ADC_CONVERSION_TIMEOUT_MS        ((uint32_t)   2)
/* Definitions of environment analog values */
/* Value of analog reference voltage (Vref+), connected to analog voltage   */
/* supply Vdda (unit: mV).                                                  */
#define VDDA_APPLI                       ((uint32_t)3300)
/* Definitions of data related to this example */
/* Init variable out of expected ADC conversion data range */
#define VAR_CONVERTED_DATA_INIT_VALUE    (__LL_ADC_DIGITAL_SCALE(LL_ADC_RESOLUTION_12B) + 1)
/* Definition of ADCx conversions data table size */
/* Note: Considering interruption occurring after each number of            */
/*       "ADC_CONVERTED_DATA_BUFFER_SIZE" ADC conversions                   */
/*       (IT from DMA transfer complete),                                   */
/*       select sampling time and ADC clock with sufficient                 */
/*       duration to not create an overhead situation in IRQHandler.        */
#define ADC_CONVERTED_DATA_BUFFER_SIZE   ((uint32_t) 256)
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Variables for ADC conversion data */
__IO   uint32_t aADCxADCyMultimodeDualConvertedData[ADC_CONVERTED_DATA_BUFFER_SIZE];     /* ADC multimode dual conversion data: ADC master and ADC slave conversion data are concatenated in a registers of 32 bits. */
static uint16_t aADCxMultimodeDualMasterConvertedData[ADC_CONVERTED_DATA_BUFFER_SIZE];/* For the purpose of this example, dispatch multimode dual conversion data into array corresponding to ADC master conversion data. */
static uint16_t aADCyMultimodeDualSlaveConvertedData[ADC_CONVERTED_DATA_BUFFER_SIZE]; /* For the purpose of this example, dispatch multimode dual conversion data into array corresponding to ADC slave conversion data. */
/* Variable to report status of DMA transfer of ADC group regular conversions */
/*  0: DMA transfer is not completed                                          */
/*  1: DMA transfer is completed                                              */
/*  2: DMA transfer has not been started yet (initial state)                  */
__IO uint8_t ubDmaTransferStatus = 2; /* Variable set into DMA interruption callback */
/* Private function prototypes -----------------------------------------------*/
void     SystemClock_Config(void);
void     Configure_DMA(void);
void     Configure_ADC(void);
void     Configure_ADC_slave(void);
void     Activate_ADC(void);
void     Activate_ADC_slave(void);
static void CPU_CACHE_Enable(void);
/* Private functions ---------------------------------------------------------*/
/**
* @brief  Main program
* @param  None
* @retval None
*/
int main(void)
{
/* Enable the CPU Cache */
CPU_CACHE_Enable();
/* Configure the system clock to 216 MHz */
SystemClock_Config();
/* Initialize button in EXTI mode */
/* UserButton_Init(); */
/* Configure DMA for data transfer from ADC */
Configure_DMA();
/* Configure ADC */
/* Note: This function configures the ADC but does not enable it.           */
/*       To enable it, use function "Activate_ADC()".                       */
/*       This is intended to optimize power consumption:                    */
/*       1. ADC configuration can be done once at the beginning             */
/*          (ADC disabled, minimal power consumption)                       */
/*       2. ADC enable (higher power consumption) can be done just before   */
/*          ADC conversions needed.                                         */
/*          Then, possible to perform successive "Activate_ADC()",          */
/*          "Deactivate_ADC()", ..., without having to set again            */
/*          ADC configuration.                                              */
Configure_ADC();
/* For multimode, configure ADC slave */
Configure_ADC_slave();
/* Activate ADC */
/* Perform ADC activation procedure to make it ready to convert. */
Activate_ADC();
Activate_ADC_slave();
LL_ADC_REG_StartConversionSWStart(ADC1);
/* Infinite loop */
while (1)
{
/* Note: ADC group regular conversion start is done into push button      */
/*       IRQ handler, refer to function "UserButton_Callback()".          */
/* Note: LED state depending on DMA transfer status is set into DMA       */
/*       IRQ handler, refer to functions "DmaTransferComplete()"          */
/*       and "DmaTransferHalfComplete()".                                 */
/* Note: ADC conversion data are stored into array                        */
/*       "aADCxADCyMultimodeDualConvertedData".                           */
/*       For this example purpose, ADC conversion data of ADC master and  */
/*       ADC slave are dispatched into arrays */
/*       "aADCxMultimodeDualMasterConvertedData"                          */
/*       and "aADCyMultimodeDualSlaveConvertedData", refer to comments    */
/*       into function "DmaTransferComplete()".                           */
/*       (for debug: see variable content into watch window).             */
/* Note: ADC conversion data can be computed to physical values           */
/*       using ADC LL driver helper macro:                                */
/*         uhADCxConvertedData_Voltage_mVolt                              */
/*         = __LL_ADC_CALC_DATA_TO_VOLTAGE(VDDA_APPLI,                    */
/*                                      uhADCxConvertedData),             */
/*                                      LL_ADC_RESOLUTION_12B)            */
}
}
/**
* @brief  This function configures DMA for transfer of data from ADC
* @param  None
* @retval None
*/
void Configure_DMA(void)
{
/*## Configuration of NVIC #################################################*/
/* Configure NVIC to enable DMA interruptions */
NVIC_SetPriority(DMA2_Stream0_IRQn, 1);  /* DMA IRQ lower priority than ADC IRQ */
NVIC_EnableIRQ(DMA2_Stream0_IRQn);
/*## Configuration of DMA ##################################################*/
/* Enable the peripheral clock of DMA */
LL_AHB1_GRP1_EnableClock(LL_AHB1_GRP1_PERIPH_DMA2);
/* Configure the DMA transfer */
/*  - DMA transfer in circular mode to match with ADC configuration:        */
/*    DMA unlimited requests.                                               */
/*  - DMA transfer from ADC without address increment.                      */
/*  - DMA transfer to memory with address increment.                        */
/*  - DMA transfer from ADC by word to match with ADC configuration:        */
/*    ADC resolution 12 bits and and multimode enabled,                     */
/*    ADC master and ADC slave conversion data are concatenated in          */
/*    a register of 32 bits.                                                */
/*  - DMA transfer to memory by word to match with ADC conversion data      */
/*    buffer variable type: word.                                           */
LL_DMA_SetChannelSelection(DMA2, LL_DMA_STREAM_0, LL_DMA_CHANNEL_0);
LL_DMA_ConfigTransfer(DMA2,
LL_DMA_STREAM_0,
LL_DMA_DIRECTION_PERIPH_TO_MEMORY |
LL_DMA_MODE_CIRCULAR              |
LL_DMA_PERIPH_NOINCREMENT         |
LL_DMA_MEMORY_INCREMENT           |
LL_DMA_PDATAALIGN_WORD            |
LL_DMA_MDATAALIGN_WORD            |
LL_DMA_PRIORITY_HIGH               );
/* Set DMA transfer addresses of source and destination */
/* Note: On this STM32 device, in multimode, ADC conversion data with       */
/*       ADC master and ADC slave conversion data concatenated are located  */
/*       in a specific multimode data register.                             */
LL_DMA_ConfigAddresses(DMA2,
LL_DMA_STREAM_0,
LL_ADC_DMA_GetRegAddr(ADC1, LL_ADC_DMA_REG_REGULAR_DATA_MULTI),
(uint32_t)&aADCxADCyMultimodeDualConvertedData,
LL_DMA_DIRECTION_PERIPH_TO_MEMORY);
/* Set DMA transfer size */
LL_DMA_SetDataLength(DMA2,
LL_DMA_STREAM_0,
ADC_CONVERTED_DATA_BUFFER_SIZE);
/* Enable DMA transfer interruption: transfer complete */
LL_DMA_EnableIT_TC(DMA2,
LL_DMA_STREAM_0);
/*## Activation of DMA #####################################################*/
/* Enable the DMA transfer */
LL_DMA_EnableStream(DMA2, LL_DMA_STREAM_0);
}
/**
* @brief  Configure ADC (ADC instance: ADC1) and GPIO used by ADC channels.
* @note   In case re-use of this function outside of this example:
*         This function includes checks of ADC hardware constraints before
*         executing some configuration functions.
*         - In this example, all these checks are not necessary but are
*           implemented anyway to show the best practice usages
*           corresponding to reference manual procedure.
*           (On some STM32 series, setting of ADC features are not
*           conditioned to ADC state. However, in order to be compliant with
*           other STM32 series and to show the best practice usages,
*           ADC state is checked anyway with same constraints).
*           Software can be optimized by removing some of these checks,
*           if they are not relevant considering previous settings and actions
*           in user application.
*         - If ADC is not in the appropriate state to modify some parameters,
*           the setting of these parameters is bypassed without error
*           reporting:
*           it can be the expected behavior in case of recall of this
*           function to update only a few parameters (which update fullfills
*           the ADC state).
*           Otherwise, it is up to the user to set the appropriate error
*           reporting in user application.
* @note   Peripheral configuration is minimal configuration from reset values.
*         Thus, some useless LL unitary functions calls below are provided as
*         commented examples - setting is default configuration from reset.
* @param  None
* @retval None
*/
void Configure_ADC(void)
{
/*## Configuration of GPIO used by ADC channels ############################*/
/* Note: On this STM32 device, ADC1 channel 4 is mapped on GPIO pin PA.04 */
/* Enable GPIO Clock */
LL_AHB1_GRP1_EnableClock(LL_AHB1_GRP1_PERIPH_GPIOA);
/* Configure GPIO in analog mode to be used as ADC input */
LL_GPIO_SetPinMode(GPIOA, LL_GPIO_PIN_0, LL_GPIO_MODE_ANALOG);
/*## Configuration of ADC ##################################################*/
/*## Configuration of ADC hierarchical scope: common to several ADC ########*/
/* Enable ADC clock (core clock) */
LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_ADC1);
/* Note: Hardware constraint (refer to description of the functions         */
/*       below):                                                            */
/*       On this STM32 serie, setting of these features are not             */
/*       conditioned to ADC state.                                          */
/*       However, in order to be compliant with other STM32 series          */
/*       and to show the best practice usages, ADC state is checked.        */
/*       Software can be optimized by removing some of these checks, if     */
/*       they are not relevant considering previous settings and actions    */
/*       in user application.                                               */
if(__LL_ADC_IS_ENABLED_ALL_COMMON_INSTANCE() == 0)
{
/* Note: Call of the functions below are commented because they are       */
/*       useless in this example:                                         */
/*       setting corresponding to default configuration from reset state. */
/* Set ADC clock (conversion clock) common to several ADC instances */
LL_ADC_SetCommonClock(__LL_ADC_COMMON_INSTANCE(ADC1), LL_ADC_CLOCK_SYNC_PCLK_DIV2);
/* Set ADC measurement path to internal channels */
// LL_ADC_SetCommonPathInternalCh(__LL_ADC_COMMON_INSTANCE(ADC1), LL_ADC_PATH_INTERNAL_NONE);
/*## Configuration of ADC hierarchical scope: multimode ####################*/
/* Set ADC multimode configuration */
LL_ADC_SetMultimode(__LL_ADC_COMMON_INSTANCE(ADC1), LL_ADC_MULTI_TRIPLE_REG_INTERL);
/* Set ADC multimode DMA transfer */
LL_ADC_SetMultiDMATransfer(__LL_ADC_COMMON_INSTANCE(ADC1), LL_ADC_MULTI_REG_DMA_UNLMT_3);
/* Set ADC multimode: delay between 2 sampling phases */
/* Note: Delay has been chosen to have ADC2 conversion start in the       */
/*       mid-delay between ADC1 conversions.                              */
LL_ADC_SetMultiTwoSamplingDelay(__LL_ADC_COMMON_INSTANCE(ADC1), LL_ADC_MULTI_TWOSMP_DELAY_5CYCLES);
}
/*## Configuration of ADC hierarchical scope: ADC instance #################*/
/* Note: Hardware constraint (refer to description of the functions         */
/*       below):                                                            */
/*       On this STM32 serie, setting of these features are not             */
/*       conditioned to ADC state.                                          */
/*       However, ADC state is checked anyway with standard requirements    */
/*       (refer to description of this function).                           */
if (LL_ADC_IsEnabled(ADC1) == 0)
{
/* Note: Call of the functions below are commented because they are       */
/*       useless in this example:                                         */
/*       setting corresponding to default configuration from reset state. */
/* Set ADC data resolution */
// LL_ADC_SetResolution(ADC1, LL_ADC_RESOLUTION_12B);
/* Set ADC conversion data alignment */
// LL_ADC_SetResolution(ADC1, LL_ADC_DATA_ALIGN_RIGHT);
/* Set Set ADC sequencers scan mode, for all ADC groups                   */
/* (group regular, group injected).                                       */
// LL_ADC_SetSequencersScanMode(ADC1, LL_ADC_SEQ_SCAN_DISABLE);
}
/*## Configuration of ADC hierarchical scope: ADC group regular ############*/
/* Note: Hardware constraint (refer to description of the functions         */
/*       below):                                                            */
/*       On this STM32 serie, setting of these features are not             */
/*       conditioned to ADC state.                                          */
/*       However, ADC state is checked anyway with standard requirements    */
/*       (refer to description of this function).                           */
if (LL_ADC_IsEnabled(ADC1) == 0)
{
/* Set ADC group regular trigger source */
LL_ADC_REG_SetTriggerSource(ADC1, LL_ADC_REG_TRIG_SOFTWARE);
/* Set ADC group regular trigger polarity */
// LL_ADC_REG_SetTriggerEdge(ADC1, LL_ADC_REG_TRIG_EXT_RISING);
/* Set ADC group regular continuous mode */
LL_ADC_REG_SetContinuousMode(ADC1, LL_ADC_REG_CONV_CONTINUOUS);
/* Set ADC group regular conversion data transfer */
/* Note: Both ADC master and ADC slave have multimode setting             */
/*       to use 1 DMA channel for all ADC instances.                      */
/*       In this case, each ADC instance must have setting of             */
/*       ADC DMA request set to default value (no DMA transfer).          */
/*       and ADC DMA transfer is managed by ADC common instance.          */
/*       Refer to function "LL_ADC_SetMultiDMATransfer()".                */
LL_ADC_REG_SetDMATransfer(ADC1, LL_ADC_REG_DMA_TRANSFER_NONE);
/* Set ADC group regular sequencer */
/* Note: On this STM32 serie, ADC group regular sequencer is              */
/*       fully configurable: sequencer length and each rank               */
/*       affectation to a channel are configurable.                       */
/*       Refer to description of function                                 */
/*       "LL_ADC_REG_SetSequencerLength()".                               */
/* Set ADC group regular sequencer length and scan direction */
LL_ADC_REG_SetSequencerLength(ADC1, LL_ADC_REG_SEQ_SCAN_DISABLE);
/* Set ADC group regular sequencer discontinuous mode */
// LL_ADC_REG_SetSequencerDiscont(ADC1, LL_ADC_REG_SEQ_DISCONT_DISABLE);
/* Set ADC group regular sequence: channel on the selected sequence rank. */
LL_ADC_REG_SetSequencerRanks(ADC1, LL_ADC_REG_RANK_1, LL_ADC_CHANNEL_0);
}
/*## Configuration of ADC hierarchical scope: ADC group injected ###########*/
/* Note: Hardware constraint (refer to description of the functions         */
/*       below):                                                            */
/*       On this STM32 serie, setting of these features are not             */
/*       conditioned to ADC state.                                          */
/*       However, ADC state is checked anyway with standard requirements    */
/*       (refer to description of this function).                           */
if (LL_ADC_IsEnabled(ADC1) == 0)
{
/* Note: Call of the functions below are commented because they are       */
/*       useless in this example:                                         */
/*       setting corresponding to default configuration from reset state. */
/* Set ADC group injected trigger source */
// LL_ADC_INJ_SetTriggerSource(ADC1, LL_ADC_INJ_TRIG_SOFTWARE);
/* Set ADC group injected trigger polarity */
// LL_ADC_INJ_SetTriggerEdge(ADC1, LL_ADC_INJ_TRIG_EXT_RISING);
/* Set ADC group injected conversion trigger  */
// LL_ADC_INJ_SetTrigAuto(ADC1, LL_ADC_INJ_TRIG_INDEPENDENT);
/* Set ADC group injected sequencer */
/* Note: On this STM32 serie, ADC group injected sequencer is             */
/*       fully configurable: sequencer length and each rank               */
/*       affectation to a channel are configurable.                       */
/*       Refer to description of function                                 */
/*       "LL_ADC_INJ_SetSequencerLength()".                               */
/* Set ADC group injected sequencer length and scan direction */
// LL_ADC_INJ_SetSequencerLength(ADC1, LL_ADC_INJ_SEQ_SCAN_DISABLE);
/* Set ADC group injected sequencer discontinuous mode */
// LL_ADC_INJ_SetSequencerDiscont(ADC1, LL_ADC_INJ_SEQ_DISCONT_DISABLE);
/* Set ADC group injected sequence: channel on the selected sequence rank. */
// LL_ADC_INJ_SetSequencerRanks(ADC1, LL_ADC_INJ_RANK_1, LL_ADC_CHANNEL_0);
}
/*## Configuration of ADC hierarchical scope: channels #####################*/
/* Note: Hardware constraint (refer to description of the functions         */
/*       below):                                                            */
/*       On this STM32 serie, setting of these features are not             */
/*       conditioned to ADC state.                                          */
/*       However, in order to be compliant with other STM32 series          */
/*       and to show the best practice usages, ADC state is checked.        */
/*       Software can be optimized by removing some of these checks, if     */
/*       they are not relevant considering previous settings and actions    */
/*       in user application.                                               */
if (LL_ADC_IsEnabled(ADC1) == 0)
{
/* Set ADC channels sampling time */
/* Note: Considering interruption occurring after each number of          */
/*       "ADC_CONVERTED_DATA_BUFFER_SIZE" ADC conversions                 */
/*       (IT from DMA transfer complete),                                 */
/*       select sampling time and ADC clock with sufficient               */
/*       duration to not create an overhead situation in IRQHandler.      */
LL_ADC_SetChannelSamplingTime(ADC1, LL_ADC_CHANNEL_0, LL_ADC_SAMPLINGTIME_3CYCLES);
}
/*## Configuration of ADC transversal scope: analog watchdog ###############*/
/* Note: On this STM32 serie, there is only 1 analog watchdog available.    */
/* Set ADC analog watchdog: channels to be monitored */
// LL_ADC_SetAnalogWDMonitChannels(ADC1, LL_ADC_AWD_DISABLE);
/* Set ADC analog watchdog: thresholds */
// LL_ADC_SetAnalogWDThresholds(ADC1, LL_ADC_AWD_THRESHOLD_HIGH, __LL_ADC_DIGITAL_SCALE(LL_ADC_RESOLUTION_12B));
// LL_ADC_SetAnalogWDThresholds(ADC1, LL_ADC_AWD_THRESHOLD_LOW, 0x000);
/*## Configuration of ADC transversal scope: oversampling ##################*/
/* Note: Feature not available on this STM32 serie */
/* Note: in this example, ADC group regular end of conversions              */
/*       (number of ADC conversions defined by DMA buffer size)             */
/*       are notified by DMA transfer interruptions).                       */
}
/**
* @brief  For multimode, configure ADC slave (ADC instance: ADC2)
*         and GPIO used by ADC channels.
* @note   Configuration of GPIO:
*           Not configured: same as ADC master (ADC slave shares the common configuration of ADC master)
*         Configuration of ADC:
*         - Common to several ADC:
*           Not configured: same as ADC master (ADC slave shares the common configuration of ADC master)
*         - Multimode
*           Not configured: same as ADC master (ADC slave shares the common configuration of ADC master)
* @note   In case re-use of this function outside of this example:
*         This function includes checks of ADC hardware constraints before
*         executing some configuration functions.
*         - In this example, all these checks are not necessary but are
*           implemented anyway to show the best practice usages
*           corresponding to reference manual procedure.
*           (On some STM32 series, setting of ADC features are not
*           conditioned to ADC state. However, in order to be compliant with
*           other STM32 series and to show the best practice usages,
*           ADC state is checked anyway with same constraints).
*           Software can be optimized by removing some of these checks,
*           if they are not relevant considering previous settings and actions
*           in user application.
*         - If ADC is not in the appropriate state to modify some parameters,
*           the setting of these parameters is bypassed without error
*           reporting:
*           it can be the expected behavior in case of recall of this
*           function to update only a few parameters (which update fullfills
*           the ADC state).
*           Otherwise, it is up to the user to set the appropriate error
*           reporting in user application.
* @note   Peripheral configuration is minimal configuration from reset values.
*         Thus, some useless LL unitary functions calls below are provided as
*         commented examples - setting is default configuration from reset.
* @param  None
* @retval None
*/
void Configure_ADC_slave(void)
{
/*## Configuration of GPIO used by ADC channels ############################*/
/* Note: not configured: In this example, ADC slave group regular converts  */
/*       the same channel as ADC master group regular.                      */
/*       Channel configuration same as ADC master.                          */
/*## Configuration of ADC ##################################################*/
/* Enable ADC clock (core clock) */
LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_ADC2);
LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_ADC3);
/*## Configuration of ADC hierarchical scope: common to several ADC ########*/
/* Note: ADC clock (core clock) not configured: same as ADC master          */
/*       (ADC slave shares the common clock of ADC master).                 */
/* Note: not configured: same as ADC master (ADC slave shares the common    */
/*       configuration of ADC master).                                      */
/*## Configuration of ADC hierarchical scope: multimode ####################*/
/* Note: not configured: same as ADC master (ADC slave shares the common    */
/*       configuration of ADC master).                                      */
/*## Configuration of ADC hierarchical scope: ADC instance #################*/
/* Note: Hardware constraint (refer to description of the functions         */
/*       below):                                                            */
/*       On this STM32 serie, setting of these features are not             */
/*       conditioned to ADC state.                                          */
/*       However, ADC state is checked anyway with standard requirements    */
/*       (refer to description of this function).                           */
if (LL_ADC_IsEnabled(ADC2) == 0)
{
/* Note: Call of the functions below are commented because they are       */
/*       useless in this example:                                         */
/*       setting corresponding to default configuration from reset state. */
/* Set ADC data resolution */
// LL_ADC_SetResolution(ADC2, LL_ADC_RESOLUTION_12B);
/* Set ADC conversion data alignment */
// LL_ADC_SetResolution(ADC2, LL_ADC_DATA_ALIGN_RIGHT);
/* Set Set ADC sequencers scan mode, for all ADC groups                   */
/* (group regular, group injected).                                       */
LL_ADC_SetSequencersScanMode(ADC2, LL_ADC_SEQ_SCAN_ENABLE);
LL_ADC_SetSequencersScanMode(ADC3, LL_ADC_SEQ_SCAN_ENABLE);
}
/*## Configuration of ADC hierarchical scope: ADC group regular ############*/
/* Note: Hardware constraint (refer to description of the functions         */
/*       below):                                                            */
/*       On this STM32 serie, setting of these features are not             */
/*       conditioned to ADC state.                                          */
/*       However, ADC state is checked anyway with standard requirements    */
/*       (refer to description of this function).                           */
if (LL_ADC_IsEnabled(ADC2) == 0)
{
/* Set ADC group regular trigger source */
/* Note: On this STM32 device, in multimode, ADC slave trigger source     */
/*       setting is mandatory: SW start.                                  */
LL_ADC_REG_SetTriggerSource(ADC2, LL_ADC_REG_TRIG_SOFTWARE);
LL_ADC_REG_SetTriggerSource(ADC3, LL_ADC_REG_TRIG_SOFTWARE);
/* Set ADC group regular continuous mode */
/* Note: On this STM32 device, in multimode, ADC slave continuous         */
/*       conversions mode must be the same as ADC master.                 */
LL_ADC_REG_SetContinuousMode(ADC2, LL_ADC_REG_CONV_CONTINUOUS);
LL_ADC_REG_SetContinuousMode(ADC3, LL_ADC_REG_CONV_CONTINUOUS);
/* Set ADC group regular conversion data transfer */
/* Note: Both ADC master and ADC slave have multimode setting             */
/*       to use 1 DMA channel for all ADC instances.                      */
/*       In this case, each ADC instance must have setting of             */
/*       ADC DMA request set to default value (no DMA transfer).          */
/*       and ADC DMA transfer is managed by ADC common instance.          */
/*       Refer to function "LL_ADC_SetMultiDMATransfer()".                */
LL_ADC_REG_SetDMATransfer(ADC2, LL_ADC_REG_DMA_TRANSFER_NONE);
LL_ADC_REG_SetDMATransfer(ADC3, LL_ADC_REG_DMA_TRANSFER_NONE);
/* Specify which ADC flag between EOC (end of unitary conversion)         */
/* or EOS (end of sequence conversions) is used to indicate               */
/* the end of conversion.                                                 */
// LL_ADC_REG_SetFlagEndOfConversion(ADC2, LL_ADC_REG_FLAG_EOC_SEQUENCE_CONV);
/* Set ADC group regular sequencer */
/* Note: On this STM32 serie, ADC group regular sequencer is              */
/*       fully configurable: sequencer length and each rank               */
/*       affectation to a channel are configurable.                       */
/*       Refer to description of function                                 */
/*       "LL_ADC_REG_SetSequencerLength()".                               */
/* Set ADC group regular sequencer length and scan direction */
LL_ADC_REG_SetSequencerLength(ADC2, LL_ADC_REG_SEQ_SCAN_DISABLE);
LL_ADC_REG_SetSequencerLength(ADC3, LL_ADC_REG_SEQ_SCAN_DISABLE);
/* Set ADC group regular sequencer discontinuous mode */
// LL_ADC_REG_SetSequencerDiscont(ADC2, LL_ADC_REG_SEQ_DISCONT_DISABLE);
/* Set ADC group regular sequence: channel on the selected sequence rank. */
LL_ADC_REG_SetSequencerRanks(ADC2, LL_ADC_REG_RANK_1, LL_ADC_CHANNEL_0);
LL_ADC_REG_SetSequencerRanks(ADC3, LL_ADC_REG_RANK_1, LL_ADC_CHANNEL_0);
}
/*## Configuration of ADC hierarchical scope: ADC group injected ###########*/
/* Note: Hardware constraint (refer to description of the functions         */
/*       below):                                                            */
/*       On this STM32 serie, setting of these features are not             */
/*       conditioned to ADC state.                                          */
/*       However, ADC state is checked anyway with standard requirements    */
/*       (refer to description of this function).                           */
if (LL_ADC_IsEnabled(ADC2) == 0)
{
/* Note: Call of the functions below are commented because they are       */
/*       useless in this example:                                         */
/*       setting corresponding to default configuration from reset state. */
/* Set ADC group injected trigger source */
// LL_ADC_INJ_SetTriggerSource(ADC2, LL_ADC_INJ_TRIG_SOFTWARE);
/* Set ADC group injected trigger polarity */
// LL_ADC_INJ_SetTriggerEdge(ADC2, LL_ADC_INJ_TRIG_EXT_RISING);
/* Set ADC group injected conversion trigger  */
// LL_ADC_INJ_SetTrigAuto(ADC2, LL_ADC_INJ_TRIG_INDEPENDENT);
/* Set ADC group injected sequencer */
/* Note: On this STM32 serie, ADC group injected sequencer is             */
/*       fully configurable: sequencer length and each rank               */
/*       affectation to a channel are configurable.                       */
/*       Refer to description of function                                 */
/*       "LL_ADC_INJ_SetSequencerLength()".                               */
/* Set ADC group injected sequencer length and scan direction */
// LL_ADC_INJ_SetSequencerLength(ADC2, LL_ADC_INJ_SEQ_SCAN_DISABLE);
/* Set ADC group injected sequencer discontinuous mode */
// LL_ADC_INJ_SetSequencerDiscont(ADC2, LL_ADC_INJ_SEQ_DISCONT_DISABLE);
/* Set ADC group injected sequence: channel on the selected sequence rank. */
// LL_ADC_INJ_SetSequencerRanks(ADC2, LL_ADC_INJ_RANK_1, LL_ADC_CHANNEL_0);
}
/*## Configuration of ADC hierarchical scope: channels #####################*/
/* Note: not configured: In this example, ADC slave group regular converts  */
/*       the same channel as ADC master group regular.                      */
/*       Channel configuration same as ADC master.                          */
/*## Configuration of ADC transversal scope: analog watchdog ###############*/
/* Note: On this STM32 serie, there is only 1 analog watchdog available.    */
/* Set ADC analog watchdog: channels to be monitored */
// LL_ADC_SetAnalogWDMonitChannels(ADC2, LL_ADC_AWD_DISABLE);
/* Set ADC analog watchdog: thresholds */
// LL_ADC_SetAnalogWDThresholds(ADC2, LL_ADC_AWD_THRESHOLD_HIGH, __LL_ADC_DIGITAL_SCALE(LL_ADC_RESOLUTION_12B));
// LL_ADC_SetAnalogWDThresholds(ADC2, LL_ADC_AWD_THRESHOLD_LOW, 0x000);
/*## Configuration of ADC transversal scope: oversampling ##################*/
/* Note: Feature not available on this STM32 serie */
/* Note: in this example, ADC group regular end of conversions              */
/*       (number of ADC conversions defined by DMA buffer size)             */
/*       are notified by DMA transfer interruptions).                       */
}
/**
* @brief  Perform ADC activation procedure to make it ready to convert
*         (ADC instance: ADC1).
* @note   Operations:
*         - ADC instance
*           - Enable ADC
*         - ADC group regular
*           none: ADC conversion start-stop to be performed
*                 after this function
*         - ADC group injected
*           none: ADC conversion start-stop to be performed
*                 after this function
* @param  None
* @retval None
*/
void Activate_ADC(void)
{
#if (USE_TIMEOUT == 1)
uint32_t Timeout = 0; /* Variable used for timeout management */
#endif /* USE_TIMEOUT */
/*## Operation on ADC hierarchical scope: ADC instance #####################*/
/* Note: Hardware constraint (refer to description of the functions         */
/*       below):                                                            */
/*       On this STM32 serie, setting of these features are not             */
/*       conditioned to ADC state.                                          */
/*       However, in order to be compliant with other STM32 series          */
/*       and to show the best practice usages, ADC state is checked.        */
/*       Software can be optimized by removing some of these checks, if     */
/*       they are not relevant considering previous settings and actions    */
/*       in user application.                                               */
if (LL_ADC_IsEnabled(ADC1) == 0)
{
/* Enable ADC */
LL_ADC_Enable(ADC1);
}
/*## Operation on ADC hierarchical scope: ADC group regular ################*/
/* Note: No operation on ADC group regular performed here.                  */
/*       ADC group regular conversions to be performed after this function  */
/*       using function:                                                    */
/*       "LL_ADC_REG_StartConversion();"                                    */
/*## Operation on ADC hierarchical scope: ADC group injected ###############*/
/* Note: No operation on ADC group injected performed here.                 */
/*       ADC group injected conversions to be performed after this function */
/*       using function:                                                    */
/*       "LL_ADC_INJ_StartConversion();"                                    */
}
/**
* @brief  Perform ADC activation procedure to make it ready to convert
*         (ADC instance: ADC2, used as ADC slave in multimode configuration).
* @note   Operations:
*         - ADC instance
*           - Enable ADC
*         - ADC group regular
*           none: ADC conversion start-stop to be performed
*                 after this function
*         - ADC group injected
*           none: ADC conversion start-stop to be performed
*                 after this function
* @param  None
* @retval None
*/
void Activate_ADC_slave(void)
{
#if (USE_TIMEOUT == 1)
uint32_t Timeout = 0; /* Variable used for timeout management */
#endif /* USE_TIMEOUT */
/*## Operation on ADC hierarchical scope: ADC instance #####################*/
/* Note: Hardware constraint (refer to description of the functions         */
/*       below):                                                            */
/*       On this STM32 serie, setting of these features are not             */
/*       conditioned to ADC state.                                          */
/*       However, in order to be compliant with other STM32 series          */
/*       and to show the best practice usages, ADC state is checked.        */
/*       Software can be optimized by removing some of these checks, if     */
/*       they are not relevant considering previous settings and actions    */
/*       in user application.                                               */
if (LL_ADC_IsEnabled(ADC2) == 0)
{
/* Enable ADC */
LL_ADC_Enable(ADC2);
LL_ADC_Enable(ADC3);
}
/*## Operation on ADC hierarchical scope: ADC group regular ################*/
/* Note: No operation on ADC group regular performed here.                  */
/*       In ADC multimode group regular interleaved, ADC slave conversions  */
/*       start and stop are controlled by ADC master.                       */
/*## Operation on ADC hierarchical scope: ADC group injected ###############*/
/* Note: No operation on ADC group injected performed here.                 */
/*       ADC group injected conversions to be performed after this function */
/*       using function:                                                    */
/*       "LL_ADC_INJ_StartConversion();"                                    */
}
/**
* @brief  System Clock Configuration
*         The system Clock is configured as follow :
*            System Clock source            = PLL (HSE)
*            SYSCLK(Hz)                     = 216000000
*            HCLK(Hz)                       = 216000000
*            AHB Prescaler                  = 1
*            APB1 Prescaler                 = 4
*            APB2 Prescaler                 = 2
*            HSI Frequency(Hz)              = 8000000
*            PLL_M                          = 8
*            PLL_N                          = 432
*            PLL_P                          = 2
*            VDD(V)                         = 3.3
*            Main regulator output voltage  = Scale1 mode
*            Flash Latency(WS)              = 7
* @param  None
* @retval None
*/
void SystemClock_Config(void)
{
/* Enable HSE clock */
LL_RCC_HSE_EnableBypass();
LL_RCC_HSE_Enable();
while(LL_RCC_HSE_IsReady() != 1)
{
};
/* Set FLASH latency */
LL_FLASH_SetLatency(LL_FLASH_LATENCY_7);
/* Enable PWR clock */
LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_PWR);
/* Activation OverDrive Mode */
LL_PWR_EnableOverDriveMode();
while(LL_PWR_IsActiveFlag_OD() != 1)
{
};
/* Activation OverDrive Switching */
LL_PWR_EnableOverDriveSwitching();
while(LL_PWR_IsActiveFlag_ODSW() != 1)
{
};
/* Main PLL configuration and activation */
LL_RCC_PLL_ConfigDomain_SYS(LL_RCC_PLLSOURCE_HSE, LL_RCC_PLLM_DIV_8, 432, LL_RCC_PLLP_DIV_2);
LL_RCC_PLL_Enable();
while(LL_RCC_PLL_IsReady() != 1)
{
};
/* Sysclk activation on the main PLL */
LL_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_1);
LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_PLL);
while(LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_PLL)
{
};
/* Set APB1 & APB2 prescaler */
LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_4);
LL_RCC_SetAPB2Prescaler(LL_RCC_APB2_DIV_2);
/* Set systick to 1ms */
SysTick_Config(216000000 / 1000);
/* Update CMSIS variable (which can be updated also through SystemCoreClockUpdate function) */
SystemCoreClock = 216000000;
}
/**
* @brief  CPU L1-Cache enable.
* @param  None
* @retval None
*/
static void CPU_CACHE_Enable(void)
{
/* Enable I-Cache */
SCB_EnableICache();
/* Enable D-Cache */
SCB_EnableDCache();
}
/******************************************************************************/
/*   USER IRQ HANDLER TREATMENT                                               */
/******************************************************************************/
/**
* @brief  DMA transfer complete callback
* @note   This function is executed when the transfer complete interrupt
*         is generated
* @retval None
*/
void AdcDmaTransferComplete_Callback()
{
uint32_t tmp_index = 0;
/* For the purpose of this example, dispatch multimode dual conversion data */
/* into arrays corresponding to ADC master and ADC slave conversion data.   */
/* Note: In a real application, this processing is useless and can be       */
/*       avoided by setting multimode DMA transfer to one DMA channel       */
/*       for each of ADC master and ADC slave.                              */
/*       Refer to function "LL_ADC_SetMultiDMATransfer()".                  */
/* Management of the 2nd half of the buffer */
for (tmp_index = (ADC_CONVERTED_DATA_BUFFER_SIZE / 3); tmp_index < ADC_CONVERTED_DATA_BUFFER_SIZE; tmp_index++)
{
aADCxMultimodeDualMasterConvertedData[tmp_index] = (uint16_t) __LL_ADC_MULTI_CONV_DATA_MASTER_SLAVE(LL_ADC_MULTI_MASTER, aADCxADCyMultimodeDualConvertedData[tmp_index]);
aADCyMultimodeDualSlaveConvertedData[tmp_index]  = (uint16_t) __LL_ADC_MULTI_CONV_DATA_MASTER_SLAVE(LL_ADC_MULTI_SLAVE, aADCxADCyMultimodeDualConvertedData[tmp_index]);
}
/* Update status variable of DMA transfer */
ubDmaTransferStatus = 1;
}
#ifdef  USE_FULL_ASSERT
/**
* @brief  Reports the name of the source file and the source line number
*         where the assert_param error has occurred.
* @param  file: pointer to the source file name
* @param  line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t *file, uint32_t line)
{
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d", file, line) */
/* Infinite loop */
while (1)
{
}
}
#endif
/**
* @}
*/
/**
* @}
*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

 

STM32 ADC三重采样的坑