STM32F4Cube库调试多通道ADC+DMA问题
我定义了个uint32_t ADC_Value_arr={0,0,0,0};接收四个通道的ADC，单通道+DMA读取数据没有问题，多通道读取是只有ADC_Value_arr有数据，并且数据特别大，达到8位，还不断变化，显然错了，不知道是何原因，实在发现不了错在哪里？贴上代码，希望有人能指出错误，非常感谢！！！void HAL_ADC_MspInit(ADC_HandleTypeDef *hadc)
{
GPIO_InitTypeDef GPIO_InitStruct;
static DMA_HandleTypeDefhdma_adc;
/*##-1- Enable peripherals and GPIO Clocks #################################*/
/* Enable GPIO clock */
ADCx_CHANNEL_GPIO_CLK_ENABLE();
/* ADC1 Periph clock enable */
ADCx_CLK_ENABLE();
/* Enable DMA2 clock */
DMAx_CLK_ENABLE();
/*##-2- Configure peripheral GPIO ##########################################*/
/* ADC1 Channel2,3,6,7 GPIO pin configuration */
GPIO_InitStruct.Pin = ADCx_CHANNEL_PIN2|ADCx_CHANNEL_PIN3|ADCx_CHANNEL_PIN6|ADCx_CHANNEL_PIN7;
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(ADCx_CHANNEL_GPIO_PORT, &GPIO_InitStruct);
/*##-3- Configure the DMA streams ##########################################*/
/* Set the parameters to be configured */
hdma_adc.Instance = ADCx_DMA_STREAM; //选择stream0
hdma_adc.Init.Channel= ADCx_DMA_CHANNEL;//通道0
hdma_adc.Init.Direction = DMA_PERIPH_TO_MEMORY;//ÍâÉèµÀÄÚ´æ
hdma_adc.Init.PeriphInc = DMA_PINC_DISABLE;//ÍâÉè²»Ôö
hdma_adc.Init.MemInc = DMA_MINC_ENABLE;//内存增
hdma_adc.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD; //
hdma_adc.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;
hdma_adc.Init.Mode = DMA_CIRCULAR; //循环模式
hdma_adc.Init.Priority = DMA_PRIORITY_HIGH;
hdma_adc.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
hdma_adc.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_HALFFULL;
hdma_adc.Init.MemBurst = DMA_MBURST_SINGLE;
hdma_adc.Init.PeriphBurst = DMA_PBURST_SINGLE;
HAL_DMA_Init(&hdma_adc);
/* Associate the initialized DMA handle to the the ADC handle */
__HAL_LINKDMA(hadc, DMA_Handle, hdma_adc);
/*##-4- Configure the NVIC for DMA #########################################*/
/* NVIC configuration for DMA transfer complete interrupt */
HAL_NVIC_SetPriority(ADCx_DMA_IRQn, 5, 0);
HAL_NVIC_EnableIRQ(ADCx_DMA_IRQn);
}
void set_ADC(void)
{
ADC_ChannelConfTypeDef sConfig;
/* Configure the ADC peripheral */
AdcHandle.Instance = ADCx;//ADC1
AdcHandle.Init.ClockPrescaler = ADC_CLOCKPRESCALER_PCLK_DIV4;//21MHZ
AdcHandle.Init.Resolution = ADC_RESOLUTION12b; //12位
//AdcHandle.Init.ScanConvMode = DISABLE;
AdcHandle.Init.ScanConvMode = ENABLE;//扫描模式
AdcHandle.Init.ContinuousConvMode = ENABLE;//连续模式
AdcHandle.Init.DiscontinuousConvMode = DISABLE;//
AdcHandle.Init.NbrOfDiscConversion = 0;
AdcHandle.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
AdcHandle.Init.ExternalTrigConv = ADC_EXTERNALTRIGCONV_T1_CC1;
AdcHandle.Init.DataAlign = ADC_DATAALIGN_RIGHT;
AdcHandle.Init.NbrOfConversion = 4;
AdcHandle.Init.DMAContinuousRequests = ENABLE;
AdcHandle.Init.EOCSelection = DISABLE;
HAL_ADC_Init(&AdcHandle);
/* Configure ADC regular channel */
sConfig.Channel = ADCx_CHANNEL2;
sConfig.Rank = 1;
sConfig.SamplingTime = ADC_SAMPLETIME_480CYCLES;
sConfig.Offset = 0;
HAL_ADC_ConfigChannel(&AdcHandle, &sConfig);
sConfig.Channel = ADCx_CHANNEL3;
sConfig.Rank = 2;
sConfig.SamplingTime = ADC_SAMPLETIME_480CYCLES;
sConfig.Offset = 0;
HAL_ADC_ConfigChannel(&AdcHandle, &sConfig);
sConfig.Channel = ADCx_CHANNEL6;
sConfig.Rank = 3;
sConfig.SamplingTime = ADC_SAMPLETIME_480CYCLES;
sConfig.Offset = 0;
HAL_ADC_ConfigChannel(&AdcHandle, &sConfig);
sConfig.Channel = ADCx_CHANNEL7;
sConfig.Rank = 4;
sConfig.SamplingTime = ADC_SAMPLETIME_480CYCLES;
sConfig.Offset = 0;
HAL_ADC_ConfigChannel(&AdcHandle, &sConfig);
/* Start the conversion process and enable interrupt */
//HAL_ADC_Start_DMA(&AdcHandle, (uint32_t*)&ADCConvertedValue, 1);
HAL_ADC_Start_DMA(&AdcHandle, ADC_Value_arr, 4);
}
没试过多通道采集呢 恩，我也是用ADC DMA方式，多通道时有问题，永远都是第一个通道可以采样，好像F4和F1都是这样，F0是可以的 还有就是
hdma_adc.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD; //
hdma_adc.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD
感觉应该定义为WORD的，因为HAL_ADC_Start_DMA(&AdcHandle, ADC_Value_arr, 4);中，ADC_Value_arr是uint32 feiante 发表于 2015-2-6 08:43
还有就是
hdma_adc.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD; //
hdma_adc.Init.MemDataAlig ...
按你说的我改了，就没问题了，准确度太差了……非常感谢 亦轩阁 发表于 2015-2-9 08:15
按你说的我改了，就没问题了，准确度太差了……非常感谢
你是说可以采集多路了？能把工程发来看看吗 ADC的代码，就是我上边贴的代码，我的工程涉及太多文件，太大了，就不上传了…… feiante 发表于 2015-2-6 08:42
恩，我也是用ADC DMA方式，多通道时有问题，永远都是第一个通道可以采样，好像F4和F1都是这样，F0是可以的 ...
AdcHandle.Init.ScanConvMode = ENABLE;//扫描模式
请改为
AdcHandle.Init.ScanConvMode = ADC_SCAN_ENABLE;//扫描模式
F1这个库有BUG 谢谢 学习学习
页:
[1]
2