STM32 f103rct6 奇怪的ADC问题

zqdl8 · 发表于 2020-12-7 19:43:15

#include "adc.h"
/* USER CODE BEGIN 0 */
volatile uint32_t ADC_ConvertedValue[2]={0,0};
#define ADC1_DR_Address ((u32)0x40012400+0x4c)
/* USER CODE END 0 */
/* ADC1 init function */
void MX_ADC1_Init(void)
{
LL_ADC_InitTypeDef ADC_InitStruct = {0};
LL_ADC_CommonInitTypeDef ADC_CommonInitStruct = {0};
LL_ADC_REG_InitTypeDef ADC_REG_InitStruct = {0};
LL_GPIO_InitTypeDef GPIO_InitStruct = {0};
/* Peripheral clock enable */
LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_ADC1);
LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_GPIOA);
/**ADC1 GPIO Configuration
PA0-WKUP ------> ADC1_IN0
PA1 ------> ADC1_IN1
*/
GPIO_InitStruct.Pin = LL_GPIO_PIN_0|LL_GPIO_PIN_1;
GPIO_InitStruct.Mode = LL_GPIO_MODE_ANALOG;
LL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/* ADC1 DMA Init */
/* ADC1 Init */
LL_DMA_SetDataTransferDirection(DMA1, LL_DMA_CHANNEL_1, LL_DMA_DIRECTION_PERIPH_TO_MEMORY);
LL_DMA_SetChannelPriorityLevel(DMA1, LL_DMA_CHANNEL_1, LL_DMA_PRIORITY_HIGH);
LL_DMA_SetMode(DMA1, LL_DMA_CHANNEL_1, LL_DMA_MODE_CIRCULAR);
LL_DMA_SetPeriphIncMode(DMA1, LL_DMA_CHANNEL_1, LL_DMA_PERIPH_NOINCREMENT);
LL_DMA_SetMemoryIncMode(DMA1, LL_DMA_CHANNEL_1, LL_DMA_MEMORY_INCREMENT);
LL_DMA_SetPeriphSize(DMA1, LL_DMA_CHANNEL_1, LL_DMA_PDATAALIGN_HALFWORD);
LL_DMA_SetMemorySize(DMA1, LL_DMA_CHANNEL_1, LL_DMA_MDATAALIGN_HALFWORD);
/* ADC1 interrupt Init */
NVIC_SetPriority(ADC1_2_IRQn, NVIC_EncodePriority(NVIC_GetPriorityGrouping(),2, 0));
NVIC_EnableIRQ(ADC1_2_IRQn);
/** Common config
*/
ADC_InitStruct.DataAlignment = LL_ADC_DATA_ALIGN_RIGHT;
ADC_InitStruct.SequencersScanMode = LL_ADC_SEQ_SCAN_ENABLE;
LL_ADC_Init(ADC1, &ADC_InitStruct);
ADC_CommonInitStruct.Multimode = LL_ADC_MULTI_INDEPENDENT;
LL_ADC_CommonInit(__LL_ADC_COMMON_INSTANCE(ADC1), &ADC_CommonInitStruct);
ADC_REG_InitStruct.TriggerSource = LL_ADC_REG_TRIG_SOFTWARE;
ADC_REG_InitStruct.SequencerLength = LL_ADC_REG_SEQ_SCAN_ENABLE_2RANKS;
ADC_REG_InitStruct.SequencerDiscont = LL_ADC_REG_SEQ_DISCONT_DISABLE;
ADC_REG_InitStruct.ContinuousMode = LL_ADC_REG_CONV_CONTINUOUS;
ADC_REG_InitStruct.DMATransfer = LL_ADC_REG_DMA_TRANSFER_UNLIMITED;
LL_ADC_REG_Init(ADC1, &ADC_REG_InitStruct);
/** Configure Regular Channel
*/
LL_ADC_REG_SetSequencerRanks(ADC1, LL_ADC_REG_RANK_1, LL_ADC_CHANNEL_0);
LL_ADC_SetChannelSamplingTime(ADC1, LL_ADC_CHANNEL_0, LL_ADC_SAMPLINGTIME_55CYCLES_5);
/** Configure Regular Channel
*/
LL_ADC_REG_SetSequencerRanks(ADC1, LL_ADC_REG_RANK_2, LL_ADC_CHANNEL_1);
LL_ADC_SetChannelSamplingTime(ADC1, LL_ADC_CHANNEL_1, LL_ADC_SAMPLINGTIME_55CYCLES_5);
}
/* USER CODE BEGIN 1 */
void ADC_DMA_Config_Start(void)
{
LL_DMA_SetChannelPriorityLevel(DMA1, LL_DMA_CHANNEL_1, LL_DMA_PRIORITY_LOW);
LL_DMA_SetMemoryAddress(DMA1,LL_DMA_CHANNEL_1,(uint32_t)ADC_ConvertedValue);
LL_DMA_SetPeriphAddress(DMA1,LL_DMA_CHANNEL_1,LL_ADC_DMA_GetRegAddr(ADC1,LL_ADC_DMA_REG_REGULAR_DATA));
LL_DMA_SetDataLength(DMA1,LL_DMA_CHANNEL_1, sizeof(ADC_ConvertedValue));
LL_DMA_EnableChannel(DMA1,LL_DMA_CHANNEL_1);
LL_ADC_Enable(ADC1);
LL_ADC_StartCalibration(ADC1);
while(LL_ADC_IsCalibrationOnGoing(ADC1));
LL_ADC_REG_StartConversionSWStart(ADC1);
}