ADC1 使用DMA2传输数据，DMA中断了，但数据全是“000”，ADC输入有电压的。不知问题在什么地方，请高手帮忙看看，谢谢！ [mw_shl_code=c,true] //初始化ADC void Adc_Init(void) { GPIO_InitTypeDef GPIO_InitStructure; ADC_CommonInitTypeDef ADC_CommonInitStructure; ADC_InitTypeDef ADC_InitStructure; RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);//使能GPIOA时钟 RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE); //使能ADC1时钟 //先初始化ADC1通道5 IO口 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;//PA5 通道5 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;//模拟输入 GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;//不带上下拉 GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化 RCC_APB2PeriphResetCmd(RCC_APB2Periph_ADC1,ENABLE); //ADC1复位 RCC_APB2PeriphResetCmd(RCC_APB2Periph_ADC1,DISABLE); //复位结束 ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent;//独立模式 ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_5Cycles;//两个采样阶段之间的延迟5个时钟 ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_Disabled; //DMA失能 ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div4;//div4:预分频4分频。ADCCLK=PCLK2/4=84/4=21Mhz,ADC时钟最好不要超过36Mhz ADC_CommonInit(&ADC_CommonInitStructure);//初始化 ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;//12位模式 ADC_InitStructure.ADC_ScanConvMode = DISABLE;//非扫描模式 ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;//连续转换 ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;//禁止触发检测，使用软件触发 ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;//右对齐 ADC_InitStructure.ADC_NbrOfConversion = 1;//1个转换在规则序列中 也就是只转换规则序列1 ADC_Init(ADC1, &ADC_InitStructure);//ADC1初始化 ADC_RegularChannelConfig(ADC1, 5, 1, ADC_SampleTime_144Cycles ); // 144 ADC1通道,480个周期 ADC_DMACmd(ADC1, ENABLE); //使能ADC1的DMA ADC_DMARequestAfterLastTransferCmd(ADC1,ENABLE); ADC_Cmd(ADC1, ENABLE);//开启AD转换器 ADC_SoftwareStartConv(ADC1); //使能指定的ADC1的软件转换启动功能 ADC_DMARequestAfterLastTransferCmd(ADC1,ENABLE); //源数据变化时开启DMA传输 =======下面是DMA部分程序====== #define ADC1_DR_ADDRESS ((uint32_t)0x4001204C) void NVIC_Config(void); void MYDMA_Config(u32 AD1_Value); void NVIC_Config() { NVIC_InitTypeDef NVIC_InitStructure; /* DMA中断配置 */ NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1); //嵌套优先级分组为 1 NVIC_InitStructure.NVIC_IRQChannel = DMA2_Stream0_IRQn; //嵌套通道为DMA2_Stream0_IRQn NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1; //抢jian优先级 1 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; //响应优先级为 0 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //通道中断使能 NVIC_Init(&NVIC_InitStructure); } void MYDMA_Config(u32 AD1_Value) //DMA配置函数 { DMA_InitTypeDef DMA_InitStructure; RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2, ENABLE); DMA_DeInit(DMA2_Stream0); DMA_StructInit( &DMA_InitStructure); DMA_InitStructure.DMA_Channel = DMA_Channel_0; //选择Channel_0 DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_ADDRESS;// 数据传输的外设首地址，ADC1 DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)&AD1_Value;//ADCoverVaule; //自己定义待发送到数据首地址，强制转换为32位 DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory; //数据传输方式选择为外设到内存 DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable; DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single; DMA_InitStructure.DMA_BufferSize =510; //传输数据大小为42,单位由以下确定，大小要配合定义的数组类型和外设数据类型 DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;//外设地址禁止增加 DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; //内存地址自己增加打开 DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord; //选外设ADC1_DR为16位 DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord; //选16位 DMA_InitStructure.DMA_Mode = DMA_Mode_Circular; //DMA选Circular,循环传输 DMA_InitStructure.DMA_Priority = DMA_Priority_High; //优先级High DMA_Init(DMA2_Stream0, &DMA_InitStructure); DMA_Cmd(DMA2_Stream0, ENABLE); //使能DMA2_Stream0通道 DMA_ITConfig(DMA2_Stream0, DMA_IT_TC, ENABLE); /* DMA中断开 */ ADC_DMARequestAfterLastTransferCmd(ADC1,ENABLE); //源数据变化时开启DMA传输 } //DMA2中断 //中断发生了，AD1_Value[520] 内全是0 void DMA2_Stream0_IRQHandler(void) { if (DMA_GetITStatus(DMA2_Stream0, DMA_IT_TCIF0) != RESET) { DMA_ClearITPendingBit(DMA2_Stream0, DMA_IT_TCIF0); } } 下面是主程序； u16 AD1_Value[520]; u16 AD2_Value[520]; int main(void) { u16 adcx=0,adcx1=0; u16 adjs=0,adjs1=0; float temp; delay_init(168); //初始化延时函数 uart_init(115200); //初始化串口波特率为115200 LED_Init(); //初始化LED LCD_Init(); //初始化LCD接口 Adc_Init(); //初始化ADC NVIC_Config(); MYDMA_Config((u32)AD1_Value); //初始化DMA while(1) { ........ } } [/mw_shl_code]