H7 ADC采集时使能DMA传输后得到的总是0

fendoushuai 发表于 2024-3-28 10:02:55

本帖最后由 fendoushuai 于 2024-3-28 10:05 编辑

使用ADC1采集，DMA配置为DMA1_Stream1，关联DMA读取ADC数据后打印的总是0，断点看了下DMA传输数据的结构体中确实都是0.
我把DMA关掉，直接使用HAL_ADC_GetValue能够得到ADC的数据。

测的时候还尝试了关闭MPU和CACHE，也还是有问题。感觉就是DMA的问题，但是又找不到哪个地方配置出错了，
麻烦帮忙分析看看，哪个地方的问题

void HAL_ADC_MspInit(ADC_HandleTypeDef *hadc)
{
GPIO_InitTypeDef       GPIO_InitStruct;
static DMA_HandleTypeDef       DmaHandle;

/*##-1- Enable peripherals and GPIO Clocks #################################*/
/* Enable GPIO clock ****************************************/
__HAL_RCC_GPIOA_CLK_ENABLE();
/* ADC Periph clock enable */
__HAL_RCC_ADC12_CLK_ENABLE();
/* ADC Periph interface clock configuration */
//__HAL_RCC_ADC_CONFIG(RCC_ADCCLKSOURCE_CLKP);
/* Enable DMA clock */
__HAL_RCC_DMA1_CLK_ENABLE();

/*##- 2- Configure peripheral GPIO #########################################*/
/* ADC Channel GPIO pin configuration */
GPIO_InitStruct.Pin = GPIO_PIN_6;
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/*##- 3- Configure DMA #####################################################*/

/*********************** Configure DMA parameters ***************************/
DmaHandle.Instance             = DMA1_Stream1;
DmaHandle.Init.Request          = DMA_REQUEST_ADC1;
DmaHandle.Init.Direction       = DMA_PERIPH_TO_MEMORY;
DmaHandle.Init.PeriphInc       = DMA_PINC_DISABLE;
DmaHandle.Init.MemInc          = DMA_MINC_ENABLE;
DmaHandle.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD;
DmaHandle.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;
DmaHandle.Init.Mode             = DMA_CIRCULAR;
DmaHandle.Init.Priority          = DMA_PRIORITY_MEDIUM;
DmaHandle.XferCpltCallback       = DMA_TransferCompleteCallback;
/* Deinitialize& Initialize the DMA for new transfer */
HAL_DMA_DeInit(&DmaHandle);
HAL_DMA_Init(&DmaHandle);

/* Associate the DMA handle */
__HAL_LINKDMA(&AdcHandle, DMA_Handle, DmaHandle);

/* NVIC configuration for DMA Input data interrupt */
HAL_NVIC_SetPriority(DMA1_Stream1_IRQn, 1, 0);
HAL_NVIC_EnableIRQ(DMA1_Stream1_IRQn);
}

void BSP_vInitADC(void)
{
/* ### - 1 - Initialize ADC peripheral #################################### */
AdcHandle.Instance       = ADC1;
if (HAL_ADC_DeInit(&AdcHandle) != HAL_OK) {
/* ADC de-initialization Error */
Error_Handler(__FILE__, __LINE__);
}

AdcHandle.Init.ClockPrescaler       = ADC_CLOCK_ASYNC_DIV1;          /* Asynchronous clock mode, input ADC clock divided by 2*/
AdcHandle.Init.Resolution             = ADC_RESOLUTION_16B;          /* 16-bit resolution for converted data */
AdcHandle.Init.ScanConvMode          = DISABLE;                      /* Sequencer disabled (ADC conversion on only 1 channel: channel set on rank 1) */
AdcHandle.Init.EOCSelection          = ADC_EOC_SINGLE_CONV;          /* EOC flag picked-up to indicate conversion end */
AdcHandle.Init.LowPowerAutoWait       = DISABLE;                      /* Auto-delayed conversion feature disabled */
AdcHandle.Init.ContinuousConvMode    = ENABLE;                      /* Continuous mode enabled (automatic conversion restart after each conversion) */
AdcHandle.Init.NbrOfConversion       = 1;                            /* Parameter discarded because sequencer is disabled */
AdcHandle.Init.DiscontinuousConvMode = DISABLE;                      /* Parameter discarded because sequencer is disabled */
AdcHandle.Init.NbrOfDiscConversion    = 1;                            /* Parameter discarded because sequencer is disabled */
AdcHandle.Init.ExternalTrigConv       = ADC_SOFTWARE_START;          /* Software start to trig the 1st conversion manually, without external event */
AdcHandle.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE; /* Parameter discarded because software trigger chosen */
AdcHandle.Init.ConversionDataManagement = ADC_CONVERSIONDATA_DMA_CIRCULAR; /* ADC DMA circular requested */
AdcHandle.Init.Overrun                = ADC_OVR_DATA_OVERWRITTEN;    /* DR register is overwritten with the last conversion result in case of overrun */
AdcHandle.Init.OversamplingMode       = DISABLE;                      /* No oversampling */

/* Initialize ADC peripheral according to the passed parameters */
if (HAL_ADC_Init(&AdcHandle) != HAL_OK) {
Error_Handler(__FILE__, __LINE__);
}

/* ### - 2 - Start calibration ############################################ */
if (HAL_ADCEx_Calibration_Start(&AdcHandle, ADC_CALIB_OFFSET_LINEARITY, ADC_SINGLE_ENDED) != HAL_OK) {
Error_Handler(__FILE__, __LINE__);
}

/* ### - 3 - Channel configuration ######################################## */
sConfig.Channel    = ADC_CHANNEL_3;             /* Sampled channel number */
sConfig.Rank       = ADC_REGULAR_RANK_1;       /* Rank of sampled channel number ADCx_CHANNEL */
sConfig.SamplingTime = ADC_SAMPLETIME_810CYCLES_5; /* Sampling time (number of clock cycles unit) */
sConfig.SingleDiff = ADC_SINGLE_ENDED;          /* Single-ended input channel */
sConfig.OffsetNumber = ADC_OFFSET_NONE;          /* No offset subtraction */
sConfig.Offset = 0;                               /* Parameter discarded because offset correction is disabled */
if (HAL_ADC_ConfigChannel(&AdcHandle, &sConfig) != HAL_OK) {
Error_Handler(__FILE__, __LINE__);
}

/* ### - 4 - Start conversion in DMA mode ################################# */
SCB_CleanInvalidateDCache();
if (HAL_ADC_Start_DMA(&AdcHandle,
                     (uint32_t *)aADCxConvertedData,
                     ADC_CONVERTED_DATA_BUFFER_SIZE
                  ) != HAL_OK)
{
Error_Handler(__FILE__, __LINE__);
}

}

static void AppTaskADC(void *p_arg)
{
float AdcValues;
(void)p_arg;

while(1) {
   BSP_vToggleLED(LED_YELLOW);

   // HAL_ADC_Start(&AdcHandle);
   // HAL_ADC_PollForConversion(&AdcHandle,10);
   // aADCxConvertedData = HAL_ADC_GetValue(&AdcHandle);

   SCB_CleanInvalidateDCache();

   AdcValues = aADCxConvertedData * 3.3 / 65536;
   printf("ADC1_INP3 PA6 Value=%d, Voltage= %5.3fV,\r\n", aADCxConvertedData, AdcValues);

   OSTimeDlyHMSM(0, 0, 2, 0);
}
}

fendoushuai 发表于 2024-3-28 10:39:58

在下面三个中断函数的打断点，都没有进去

void HAL_ADC_ConvHalfCpltCallback(ADC_HandleTypeDef* hadc)
{
/* Invalidate Data Cache to get the updated content of the SRAM on the first half of the ADC converted data buffer: 32 bytes */
SCB_InvalidateDCache_by_Addr((uint32_t *) &aADCxConvertedData, ADC_CONVERTED_DATA_BUFFER_SIZE);
}

/**
* @briefConversion DMA half-transfer callback in non-blocking mode
* @paramhadc: ADC handle
* @retval None
*/
void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc)
{
/* Invalidate Data Cache to get the updated content of the SRAM on the second half of the ADC converted data buffer: 32 bytes */
SCB_InvalidateDCache_by_Addr((uint32_t *) &aADCxConvertedData, ADC_CONVERTED_DATA_BUFFER_SIZE);
}

void DMA_TransferCompleteCallback(DMA_HandleTypeDef *hdma)
{
SCB_InvalidateDCache_by_Addr((uint32_t *) &aADCxConvertedData, ADC_CONVERTED_DATA_BUFFER_SIZE);
}

eric2013 发表于 2024-3-28 15:07:39

看下你的这个工程的主RAM空间不是用的TCM吗，TCM不支持ADC DMA存储，也就是不支持通用的DMA1,DMA2

fendoushuai 发表于 2024-3-28 17:45:05

谢谢Eric，将DMA数据存放在SRAM4区后可以了

Sunliu66 发表于 2024-3-29 16:44:31

fendoushuai 发表于 2024-3-28 17:45
谢谢Eric，将DMA数据存放在SRAM4区后可以了

请问这个怎么修改存放地址呢？我也同样遇到了这个问题

Sunliu66 发表于 2024-3-29 16:46:23

你好请问是怎么修改数据存放地址的呀？我也遇到了相同的问题

eric2013 发表于 2024-3-30 08:45:17

Sunliu66 发表于 2024-3-29 16:46
你好请问是怎么修改数据存放地址的呀？我也遇到了相同的问题

可以看下我们的ADC例子，可以手动attribute at设置地址，也可以分散加载设置
https://www.armbbs.cn/forum.php?mod=viewthread&tid=86980&extra=page%3D1

Sunliu66 发表于 2024-4-1 08:44:16

eric2013 发表于 2024-3-30 08:45
可以看下我们的ADC例子，可以手动attribute at设置地址，也可以分散加载设置
https://www.armbbs.cn/for ...

好呢谢谢硬汉哥我去学习一下

页: [1]

硬汉嵌入式论坛's Archiver

H7 ADC采集时使能DMA传输后得到的总是0