STM32怎么使用TIM8 的TRGO 触发ADC

发布网友发布时间：2022-05-09 21:11

共1个回答

热心网友时间：2023-08-25 07:42

#define SampleNum 240
vu16 ADC_ConvertedValue[SampleNum];

void ADC_DMA_Config(void)
{
DMA_InitTypeDef DMA_InitStructure;

RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);

DMA_DeInit(DMA1_Channel1);
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&ADC1->DR;
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)&ADC_ConvertedValue;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize = 1;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;//外设地址不变
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;//内存地址递增
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
DMA_Init(DMA1_Channel1, &DMA_InitStructure);

DMA_Cmd(DMA1_Channel1,ENABLE);
}

void ADC1_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
ADC_InitTypeDef ADC_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_Init(GPIOC, &GPIO_InitStructure);

ADC_DMA_Config();

RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
//ADC_DeInit(ADC1);
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;//ADC1和ADC2工作在独立模式
ADC_InitStructure.ADC_ScanConvMode = DISABLE;//多通道
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;//连续转换
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T3_CC1;//软件启动转换
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;//转换结果右对齐
ADC_InitStructure.ADC_NbrOfChannel = 1;//通道数目
ADC_Init(ADC1, &ADC_InitStructure);

RCC_ADCCLKConfig(RCC_PCLK2_Div6);//PCLK 6分频
ADC_RegularChannelConfig(ADC1, ADC_Channel_15, 1, ADC_SampleTime_55Cycles5);

ADC_DMACmd(ADC1, ENABLE);

ADC_Cmd(ADC1, ENABLE);

ADC_ResetCalibration(ADC1);
while(ADC_GetResetCalibrationStatus(ADC1));
ADC_StartCalibration(ADC1);//开始校准
while(ADC_GetCalibrationStatus(ADC1));
ADC_ExternalTrigInjectedConvConfig(ADC1, ADC_ExternalTrigConv_T3_CC1);//TIM_CC1
ADC_ExternalTrigConvCmd(ADC1, ENABLE);
// ADC_SoftwareStartConvCmd (ADC1, ENABLE);
// ADC_ExternalTrigConvCmd(ADC1, ENABLE);
//设置外部触发模式使能

}