STM32F030 ADC1 DMA1采集 开启NVIC后目标数据为空,ADC1->DR有数据
本帖最后由 死鹹水魚 于 2017-6-1 09:25 编辑最近在用STMF030的片子在开发过程中遇到一个奇葩的问题，
打算实现：
ADC1的轮流采集多个通道，数据通过DMA1_CH1搬运到一片内存区，完成一圈后触发DMA传输完成中断，对采集数据进行处理。
前面的功能已经实现，但是在加入了NVIC中断配置后，发现ADC采集数据为0
调试下发现DMA写入目标地址的数据组全部为空，而ADC1->DR里面的数据是有变化的，
并且不为0。DMA内的CPAR1和CMAR1所对应的内存地址没错。NVIC中断也能进入，标志位也正常。
请问下这是什么回事？
以下是ADC、DMA、以及NVIC部分的配置函数。
void ADC_Config(void)
{
/* ADC Configuration Struct */
ADC_InitTypeDef ADC_InitStruct;
GPIO_InitTypeDef GPIO_InitStruct;
DMA_InitTypeDef DMA_InitStruct;
NVIC_InitTypeDef NVIC_InitStruct;
/* ADC1 Periph clock Enable*/
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
/* GPIOA Periph clock Enable */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
/* DMA1 Clock enable */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1 , ENABLE);
/* ADC RCC CLK */
RCC_ADCCLKConfig(RCC_ADCCLK_HSI14); /*ADC 14Mhz Clock*/
/* Configuration PA0:6 as AIN */
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2/* PA0:TEM2, PA1:TEM1, PA2:C-PV */\
|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5/* PA3:C-BAT, PA4:V-BOOST, PA5: V-BAT*/\
|GPIO_Pin_6/* PA6:V-PV */;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOA, &GPIO_InitStruct);
/* Enable DMA channel1 IRQ Channel */
NVIC_InitStruct.NVIC_IRQChannel = DMA1_Channel1_IRQn;
NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
NVIC_InitStruct.NVIC_IRQChannelPriority = 1;
//NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 1;
//NVIC_InitStruct.NVIC_IRQChannelSubPriority = 1;
NVIC_Init(&NVIC_InitStruct);
/* Initialize ADC Struct */
ADC_StructInit(&ADC_InitStruct);
/* Configuration ADC */
ADC_InitStruct.ADC_Resolution = ADC_Resolution_12b; /* ADC 12bit */
ADC_InitStruct.ADC_ContinuousConvMode = ENABLE;/* Continuous Convert Mode */
//ADC_InitStruct.ADC_ContinuousConvMode = DISABLE;
ADC_InitStruct.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConv_T1_TRGO;/*ADC_ExternalTrigConvEdge_None;*/
ADC_InitStruct.ADC_ExternalTrigConv = ADC_ExternalTrigConvEdge_Rising;
ADC_InitStruct.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStruct.ADC_ScanDirection = ADC_ScanDirection_Upward;
ADC_Init(ADC1, &ADC_InitStruct);
/* Convert the ADC1 Channel0 and channe6 with 1.5 Cycles as sampling time */
ADC_ChannelConfig(ADC1, ADC_Channel_0, ADC_SampleTime_1_5Cycles);
ADC_ChannelConfig(ADC1, ADC_Channel_1, ADC_SampleTime_1_5Cycles);
ADC_ChannelConfig(ADC1, ADC_Channel_2, ADC_SampleTime_1_5Cycles);
ADC_ChannelConfig(ADC1, ADC_Channel_3, ADC_SampleTime_1_5Cycles);
ADC_ChannelConfig(ADC1, ADC_Channel_4, ADC_SampleTime_1_5Cycles);
ADC_ChannelConfig(ADC1, ADC_Channel_5, ADC_SampleTime_1_5Cycles);
ADC_ChannelConfig(ADC1, ADC_Channel_6, ADC_SampleTime_1_5Cycles);
/* Convert the ADC1 inner temp sensor with 1.5 Cycles as Sampling time*/
/* ADCChannel 16 */
ADC_ChannelConfig(ADC1, ADC_Channel_TempSensor, ADC_SampleTime_1_5Cycles);
/* Convert the ADC1 Vref*//* ADC_Channel 17 */
ADC_ChannelConfig(ADC1, ADC_Channel_Vrefint, ADC_SampleTime_1_5Cycles);
/* ADC Calibration *//* Get ADC Calibration Data*/
ADC_Cal_Data = ADC_GetCalibrationFactor(ADC1);
/* ADC DMA request in circular mode */
ADC_DMARequestModeConfig(ADC1, ADC_DMAMode_Circular);
/* Enable ADC_DMA */
ADC_DMACmd(ADC1, ENABLE);
/* Enable the ADC peripheral */
ADC_Cmd(ADC1, ENABLE);
ADC_TempSensorCmd(ENABLE);
ADC_VrefintCmd(ENABLE);
/* Wait the ADRDY flag */
while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_ADRDY));
/* ADC Auto Power off */
ADC_AutoPowerOffCmd(ADC1, ENABLE);
/* DMA1 Configuration */
DMA_DeInit(ADC_DMA_CH);
DMA_InitStruct.DMA_PeripheralBaseAddr = (uint32_t)&(ADC1->DR); /* DMA Data Source Addr */
//DMA_InitStruct.DMA_MemoryBaseAddr = (uint32_t)ConvertDatas; /* DMA Data Distance Addr */
DMA_InitStruct.DMA_MemoryBaseAddr =(uint32_t)&g_ADCCollectorStruct;
DMA_InitStruct.DMA_DIR = DMA_DIR_PeripheralSRC; /* DMA Data Transform Dir */
DMA_InitStruct.DMA_BufferSize = 9; /* DMA Data Busser Size */
DMA_InitStruct.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStruct.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord; /* Data Length Half Word 16bit */
DMA_InitStruct.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
DMA_InitStruct.DMA_Mode = DMA_Mode_Circular; /* DMA Mode : Circular Mode */
//DMA_InitStruct.DMA_Mode = DMA_Mode_Normal;
DMA_InitStruct.DMA_Priority = DMA_Priority_High;
DMA_InitStruct.DMA_M2M = DMA_M2M_Disable;
/* DMA Init Configuration */
DMA_Init(ADC_DMA_CH, &DMA_InitStruct);
DMA_ITConfig(ADC_DMA_CH, DMA_IT_TC, ENABLE);
/* DMA1 Channel1 enable */
DMA_Cmd(ADC_DMA_CH, ENABLE);
/* ADC1 regular Software Start Conv */
ADC_StartOfConversion(ADC1);
}中断部分函数
extern void ConvertAVGFitter(void);
void DMA1_Channel1_IRQHandler(void)
{
if(DMA_GetITStatus(DMA1_IT_TE1))
{
while(1);
}
if(DMA_GetITStatus(DMA1_IT_TC1))
{
DMA_ClearFlag(DMA1_FLAG_TC1);
DMA_ClearITPendingBit(DMA1_IT_TC1);
ConvertAVGFitter();
}
}
另，ADC1是利用TIM1的TRGO触发的，请问这有关系吗？
已解决，原因为堆栈区溢出，经多次试验，整个ADC初始函数中只要加入了NVIC的InitTypedef结构体后，无论 是否配置NVIC都会出现上述现象。把NVIC部分独立成一个函数在主函数调用即可。:L 话说7天零回复也是厉害。。
感觉030这种低端型的片子看来还是少用库写为妙啊。。 看到老哥的说明，我注册也得给你评论下，非常感谢!!!!我也是同样的问题，谢谢你！！！
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