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利用STM32F030C8T6的PA0和PA1引脚来进行两通道ADC采集，通过DMA方式。直接上代码。
1、ADC的GPIO引脚配置
void ADC_GPIO_Config(void)
{
?? ?GPIO_InitTypeDef ?GPIO_InitStructure;
?? ?
?? ?/* GPIOC Periph clock enable */
?? ?RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
?? ?GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1;
?? ?GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;?? ?//模拟输入
?? ?GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;? ??
?? ?GPIO_Init(GPIOA, &GPIO_InitStructure);?? ??
}
2、ADC对应的是DMA1的通道1：DMA1_Channel1
void DMA_Config(void)
{
? ? DMA_InitTypeDef ? DMA_InitStructure;
? ? /* DMA1 clock enable */
? ? RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1 , ENABLE);
? ??
? ? /* DMA1 Channel1 Config */
? ? DMA_DeInit(DMA1_Channel1);
? ? DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)ADC1_DR_Address;
? ? DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)RegularConvData_Tab;
? ? DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
? ? DMA_InitStructure.DMA_BufferSize = 10;
? ? DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
? ? DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
? ? DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
? ? DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
? ? DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
? ? DMA_InitStructure.DMA_Priority = DMA_Priority_High;
? ? DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
? ? DMA_Init(DMA1_Channel1, &DMA_InitStructure);
? ? /* DMA1 Channel1 enable */
? ? DMA_Cmd(DMA1_Channel1, ENABLE);
}
3、ADC初始化配置
void ?ADC_Mode_Config(void)
{ ? ?
?? ?ADC_InitTypeDef ADC_InitStructure;
?? ?
?? ?RCC_ADCCLKConfig(RCC_ADCCLK_PCLK_Div4);//配置ADC的时钟频率
?? ?/* ADC1 Periph clock enable */
?? ?RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
?? ?
?? ?/* Initialize ADC structure */
?? ?ADC_StructInit(&ADC_InitStructure);
?? ?ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;?? ?//12位模式
?? ?ADC_InitStructure.ADC_ScanDirection = ADC_ScanDirection_Upward;
?? ?ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;? ??
?? ?ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;? ?
?? ?ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;?? ?//右对齐?? ?
?? ?ADC_Init(ADC1, &ADC_InitStructure);//ADC初始化
? ? ADC_ChannelConfig(ADC1, ADC_Channel_0, ADC_SampleTime_239_5Cycles); ?? ?
?? ?ADC_ChannelConfig(ADC1, ADC_Channel_1, ADC_SampleTime_239_5Cycles);?
?? ?
?? ?/* ADC Calibration */
?? ?ADC_GetCalibrationFactor(ADC1);
?? ?/* ADC DMA request in circular mode */
?? ?ADC_DMARequestModeConfig(ADC1, ADC_DMAMode_Circular);
?? ?ADC_DMACmd(ADC1,ENABLE);
?? ?ADC_Cmd(ADC1,ENABLE);?? ?//开启AD转换器?? ?
?? ?
?? ?/* Wait the ADRDY flag */
?? ?while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_ADRDY));?
?? ?/* ADC1 regular Software Start Conv */?
?? ?ADC_StartOfConversion(ADC1);
}
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