分类：STM32

LL_ADC_EnableIT_EOC(ADC1);
LL_ADC_StartCalibration(ADC1,LL_ADC_SINGLE_ENDED);
while(LL_ADC_IsCalibrationOnGoing(ADC1));
LL_ADC_Enable(ADC1);
LL_ADC_REG_StartConversion(ADC1);

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void ADC1_read(uint16_t *pusbuf)
{
LL_ADC_REG_StartConversion(ADC1);
while(LL_ADC_IsActiveFlag_EOC(ADC1) == 0);
pusbuf[0] = LL_ADC_REG_ReadConversionData10(ADC1);
while(LL_ADC_IsActiveFlag_EOC(ADC1) == 0);
pusbuf[1] = LL_ADC_REG_ReadConversionData10(ADC1);
}

SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;
SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_32;// 72000000 ~1MHZ
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_InitStructure.SPI_CRCPolynomial = 7;
SPI_Init(SPI3, &SPI_InitStructure);

void ADC_Configuration(void)
{
ADC_InitTypeDef ADC_InitStructure;
ADC_CommonInitTypeDef ADC_CommonInitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
DMA_InitTypeDef DMA_InitStruct;

// 使能DMA2时钟
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_ADC2, ENABLE);

DMA_StructInit(&DMA_InitStruct);
ADC_CommonStructInit(&ADC_CommonInitStructure);
ADC_StructInit(&ADC_InitStructure);

// 配置ADC通用设置
ADC_CommonInitStructure.ADC_Mode = ADC_DualMode_RegSimult; // 双ADC模式，规则同步
ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div2; // ADC时钟分频
ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_2; // DMA模式2
ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_5Cycles; // 双ADC采样延迟
ADC_CommonInit(&ADC_CommonInitStructure);

// 配置ADC1
ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b; // 12位分辨率
ADC_InitStructure.ADC_ScanConvMode = ENABLE; // 扫描模式
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE; // 单次转换模式
ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_Rising; // 上升沿触发
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T8_TRGO; // TIM8触发
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right; // 数据右对齐
ADC_InitStructure.ADC_NbrOfConversion = 3; // 3个转换通道
ADC_Init(ADC1, &ADC_InitStructure);

// 配置ADC1的通道
ADC_RegularChannelConfig(ADC1, ADC_Channel_4, 1, ADC_SampleTime_56Cycles); // 通道0
ADC_RegularChannelConfig(ADC1, ADC_Channel_5, 2, ADC_SampleTime_56Cycles); // 通道1
ADC_RegularChannelConfig(ADC1, ADC_Channel_6, 3, ADC_SampleTime_56Cycles); // 通道2

// 配置ADC2
ADC_Init(ADC2, &ADC_InitStructure);

// 配置ADC2的通道
ADC_RegularChannelConfig(ADC2, ADC_Channel_7, 1, ADC_SampleTime_56Cycles); // 通道0
ADC_RegularChannelConfig(ADC2, ADC_Channel_14, 2, ADC_SampleTime_56Cycles); // 通道1
ADC_RegularChannelConfig(ADC2, ADC_Channel_15, 3, ADC_SampleTime_56Cycles); // 通道2

// 配置DMA2 Stream0（用于ADC1）
DMA_InitStruct.DMA_Channel = DMA_Channel_0;
DMA_InitStruct.DMA_PeripheralBaseAddr = (uint32_t)(&ADC->CDR); // 外设地址
DMA_InitStruct.DMA_Memory0BaseAddr = (uint32_t)(adc_buffer); // 内存地址
DMA_InitStruct.DMA_DIR = DMA_DIR_PeripheralToMemory; // 传输方向
DMA_InitStruct.DMA_BufferSize = 3; // 数据长度 = 3（32 位数据）
DMA_InitStruct.DMA_PeripheralInc = DMA_PeripheralInc_Disable; // 外设地址不递增
DMA_InitStruct.DMA_MemoryInc = DMA_MemoryInc_Enable; // 内存地址递增
DMA_InitStruct.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word; // 外设数据宽度 32 位
DMA_InitStruct.DMA_MemoryDataSize = DMA_MemoryDataSize_Word; // 内存数据宽度 32 位
DMA_InitStruct.DMA_Mode = DMA_Mode_Circular; // 循环模式
DMA_InitStruct.DMA_Priority = DMA_Priority_VeryHigh; // 高优先级
DMA_InitStruct.DMA_MemoryBurst = DMA_MemoryBurst_Single;
DMA_InitStruct.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;

//DMA_InitStruct.

DMA_Init(DMA2_Stream0, &DMA_InitStruct);

// 使能DMA2 Stream0中断
DMA_ITConfig(DMA2_Stream0, DMA_IT_TC, ENABLE);

// 使能DMA2 Stream0
DMA_Cmd(DMA2_Stream0, ENABLE);
// 使能ADC1和ADC2
ADC_Cmd(ADC1, ENABLE);
ADC_Cmd(ADC2, ENABLE);

ADC_DMACmd(ADC1, ENABLE);
// 8. 启动 ADC 软件触发转换（若配置为软件触发）
ADC_SoftwareStartConv(ADC1);

ADC_MultiModeDMARequestAfterLastTransferCmd(ENABLE);

// 配置DMA2 Stream0中断
NVIC_InitStructure.NVIC_IRQChannel = DMA2_Stream0_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

while (DMA_GetCmdStatus(DMA2_Stream0) != ENABLE);

}