关于stm32DMA中断

litao12423 · 发表于 2014-9-18 15:29:44

[mw_shl_code=c,true]void ADCF_RCC_Configuration(void) { /* ADCCLK = PCLK2/4 */ RCC_ADCCLKConfig(RCC_PCLK2_Div4); RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_GPIOB, ENABLE); } void ADCF_GPIO_Configuration(void) { GPIO_InitTypeDef GPIO_InitStructure; GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN; GPIO_Init(GPIOB, &GPIO_InitStructure); } void ADCF_NVIC_Configuration(void) { NVIC_InitTypeDef NVIC_InitStructure; /* Configure and enable ADC interrupt */ NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel1_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); } /********************************************************************/ void ADCF_BoxingStart(void) { ADC_InitTypeDef ADC_InitStructure; DMA_InitTypeDef DMA_InitStructure; appv_u8BoxingDone = 0; /* Disable ADC2 DMA */ ADC_DMACmd(ADC1, DISABLE); /* Disable ADC2 */ ADC_Cmd(ADC1, DISABLE); /* DMA2 channel1 configuration ----------------------------------------------*/ DMA_DeInit(DMA1_Channel1); DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address; DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)appv_u16Adc2ConvertValueArray; DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC; DMA_InitStructure.DMA_BufferSize = APPM_BoxingLength; 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_Normal; DMA_InitStructure.DMA_Priority = DMA_Priority_High; DMA_InitStructure.DMA_M2M = DMA_M2M_Disable; DMA_Init(DMA1_Channel1, &DMA_InitStructure); /* Enable DMA1 channel1 */ DMA_ITConfig(DMA1_Channel1,DMA_IT_TC, ENABLE); DMA_Cmd(DMA1_Channel1, ENABLE); /* ADC2 configuration ------------------------------------------------------*/ ADC_InitStructure.ADC_Mode = ADC_Mode_Independent; ADC_InitStructure.ADC_ScanConvMode = DISABLE; ADC_InitStructure.ADC_ContinuousConvMode = ENABLE; ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None; ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right; ADC_InitStructure.ADC_NbrOfChannel = 1; ADC_Init(ADC1, &ADC_InitStructure); /* ADC1 regular channels configuration */ ADC_RegularChannelConfig(ADC1, ADC_Channel_9, 1, ADC_SampleTime_7Cycles5); //ADC通道9 /* Enable ADC2 DMA */ ADC_DMACmd(ADC1, ENABLE); /* Enable ADC2 */ ADC_Cmd(ADC1, ENABLE); /* Enable ADC2 reset calibaration register */ ADC_ResetCalibration(ADC1); /* Check the end of ADC2 reset calibration register */ while(ADC_GetResetCalibrationStatus(ADC1)); /* Start ADC2 calibaration */ ADC_StartCalibration(ADC1); /* Check the end of ADC2 calibration */ while(ADC_GetCalibrationStatus(ADC1)); /* Start ADC2 Software Conversion */ ADC_SoftwareStartConvCmd(ADC1, ENABLE); printf("ADCF_BoxingStart!\r\n"); } void ADCF_DMA_IRQ_Handle(void) { DMA_ITConfig(DMA1_Channel1,DMA_IT_TC, DISABLE); appv_u8BoxingDone = 1; printf("ADCF_DMA_IRQ_Handle!\r\n"); }[/mw_shl_code]

如上，我设置好ADC和DMA的相关配置后，并执行完上面的函数，是不是会进入DMA的中断处理函数ADCF_DMA_IRQ_Handle()，需要什么条件吗？
此时我的ADC采集口没有接入采集信号，是不是不会产生DMA中断？