其实非常简单,记住几点.
1)不是所有通道都支持三重采样,具体看英文手册Figure 70.
2)不用管哪个通道数据什么时候来,该来的就会来.采样好了自然来.
3)DMA最好再来个传输一半中断.在传输一半时候取走一般数据,否则传输好了再进去可能覆盖一些了,目前这个程序只写了完全传输,取走后面一半.
4)实测速度没7.2Mbps,好像才6Mbps差不多.
[mw_shl_code=c,true]/**
******************************************************************************
* @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
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支持LL库,但是不支持生成,CUBE支持LL
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