原子哥（急） SDADC 开启DMA通道，但是主函数跑不了

billycrc

原子哥，最近我在调SDADC与DMA通道的时候发现SDADC能和DMA建立数据传递联系。我的SDADC是由timer3进行触发的。我在DMA接受数组中可以明显地看到ADC的数据在发往DMA。但是奇怪的是主函数为什么不跑啊。照理来说DMA数据通道与CPU是独立分开。我在主函数中用了系统delay延时的LED。正常现象是LED灯会定时翻转，但是主函数就是不能跑。我在开启普通的12位ADC时，用这种方法能跑。但是用SDADC酒不能。希望各位大牛能够指点一二，小弟在此感激不尽。
我的芯片是STM32F373
我的程序是

[mw_shl_code=c,true]#define SDADC1_DR_Address ((uint32_t)0x40016060) #define ECG_BUFF_SIZE (uint32_t)960 uint32_t TimingDelay = 0; int16_t ECG_Buff[ECG_BUFF_SIZE]; static void SDADC_Config(void) { SDADC_AINStructTypeDef SDADC_AINStructure; NVIC_InitTypeDef NVIC_InitStructure; GPIO_InitTypeDef GPIO_InitStructure; /* GPIOE Peripheral clock enable */ RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOE, ENABLE); /* ECG_SDADC channel pin configuration: PE12 */ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL; GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7; GPIO_Init(GPIOE, &GPIO_InitStructure); /* ECG_SDADC APB2 interface clock enable */ RCC_APB2PeriphClockCmd(RCC_APB2Periph_SDADC1, ENABLE); /* PWR APB1 interface clock enable */ RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE); /* Enable ECG_SDADC analog interface */ PWR_SDADCAnalogCmd(PWR_SDADCAnalog_1, ENABLE); /* Set the SDADC divider: The SDADC should run @6MHz */ /* If Sysclk is 72MHz, SDADC divider should be 12 */ RCC_SDADCCLKConfig(RCC_SDADCCLK_SYSCLK_Div12); /* Select External reference: The reference voltage selection is available only in SDADC1 and therefore to select the VREF for SDADC2/SDADC3, SDADC1 clock must be already enabled */ SDADC_VREFSelect(SDADC_VREF_Ext); /* Insert delay equal to ~10 ms (4 ms required) */ DDelay(5); /* Enable ECGSDADC */ SDADC_Cmd(SDADC1, ENABLE); /* Enter initialization mode */ SDADC_InitModeCmd(SDADC1, ENABLE); /* wait for INITRDY flag to be set */ while(SDADC_GetFlagStatus(SDADC1, SDADC_FLAG_INITRDY) == RESET); SDADC_AINStructure.SDADC_InputMode = SDADC_InputMode_SEZeroReference; SDADC_AINStructure.SDADC_Gain = SDADC_Gain_1; SDADC_AINStructure.SDADC_CommonMode = SDADC_CommonMode_VSSA; SDADC_AINStructure.SDADC_Offset = 0; SDADC_AINInit(SDADC1, SDADC_Conf_0, &SDADC_AINStructure); /* Enable DMA transfer for injected conversions */ SDADC_DMAConfig(SDADC1, SDADC_DMATransfer_Injected, ENABLE); /* select ECG_SDADC channel to use conf0 */ SDADC_ChannelConfig(SDADC1, SDADC_Channel_3, SDADC_Conf_0); /* select SDADC Channel */ SDADC_InjectedChannelSelect(SDADC1, SDADC_Channel_3); /* Select an external trigger */ SDADC_ExternalTrigInjectedConvConfig(SDADC1, SDADC_ExternalTrigInjecConv_T3_CC1); /* Select rising edge */ SDADC_ExternalTrigInjectedConvEdgeConfig(SDADC1, SDADC_ExternalTrigInjecConvEdge_Rising); /* Exit initialization mode */ SDADC_InitModeCmd(SDADC1, DISABLE); /* configure calibration to be performed on conf0 */ SDADC_CalibrationSequenceConfig(SDADC1, SDADC_CalibrationSequence_1); /* start ECG_SDADC Calibration */ SDADC_StartCalibration(SDADC1); /* wait for ECG_SDADC Calibration process to end */ while(SDADC_GetFlagStatus(SDADC1, SDADC_FLAG_EOCAL) == RESET); NVIC_InitStructure.NVIC_IRQChannel = DMA2_Channel3_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); } static void DMA2_Config(void) { DMA_InitTypeDef DMA_InitStructure; /* Enable DMA2 clock */ RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA2, ENABLE); /* Config the DMA2 channel 3 */ DMA_DeInit(DMA2_Channel3); DMA_InitStructure.DMA_PeripheralBaseAddr = SDADC1_DR_Address; DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&ECG_Buff[0]; DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC; DMA_InitStructure.DMA_BufferSize = ECG_BUFF_SIZE; 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_Low; DMA_InitStructure.DMA_M2M = DMA_M2M_Disable; DMA_Init(DMA2_Channel3, &DMA_InitStructure); /* Enable DMA2 Channel3 Transfer half and Complete interrupt */ DMA_ITConfig(DMA2_Channel3, DMA_IT_TC | DMA_IT_HT, ENABLE); /* Enable DMA2 Channel3 */ DMA_Cmd(DMA2_Channel3, ENABLE); } static void TIM3_Config(void) { TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; TIM_OCInitTypeDef TIM_OCInitStructure; /* Enable TIM3 clock */ RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); TIM_TimeBaseStructure.TIM_Prescaler = 12; TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; TIM_TimeBaseStructure.TIM_Period = SystemCoreClock/480/13; TIM_TimeBaseStructure.TIM_ClockDivision = 0x0; TIM_TimeBaseStructure.TIM_RepetitionCounter = 0x0; TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); /* Channel1 Configuration in PWM mode */ TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Disable; TIM_OCInitStructure.TIM_Pulse = SystemCoreClock/480/26; TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; TIM_OC1Init(TIM3, &TIM_OCInitStructure); /* TIM3 enable counter */ TIM_Cmd(TIM3, ENABLE); } int main() { RCC_ClocksTypeDef RCC_Clocks; NVIC_InitTypeDef NVIC_InitStructure; /* SysTick end of count event each 1ms */ RCC_GetClocksFreq(&RCC_Clocks); SysTick_Config(RCC_Clocks.HCLK_Frequency / 1000); GPIO_Config(); LCD_Init(); LCD_Clear(Red); LCD_SetBackColor(Blue); LCD_SetTextColor(White); LCD_DisplayStringLine(0, "AD TEST: "); //ADC_Config(); DAC_Config(); //TIM_Config();//must set befor initing LCD, for the interrupt fuction will affect initing LCD . //TIM_INIT(); //must be after TIM_Config() DMA2_Config(); /* Confifgure SDADC to convert ECG voltage applied on PE7 */ SDADC_Config(); /* Configure TIM3 as trigger for SDADC conversion */ TIM3_Config(); GPIO_SetBits(GPIOC, GPIO_Pin_12|GPIO_Pin_11|GPIO_Pin_10); while(1) { DDelay(200); /* Test DMA1 TC flag */ while((DMA_GetFlagStatus(DMA1_FLAG_TC1)) == RESET ); GPIOC->ODR ^= GPIO_Pin_11; /* Clear DMA TC flag */ DMA_ClearFlag(DMA1_FLAG_TC1); //RegularConvData[0]=ADC_GetConversionValue(ADC1); DAC_SetChannel2Data(DAC1, DAC_Align_12b_R, ECG_Buff[0]); LCD_ShowNum(100,50,ECG_Buff[0]); //out the DA value which is the AD value } } [/mw_shl_code]

正点原子

代码卡在哪里呢？