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adc1和adc2均使用adc+dma的方式传输数据，都是独立的，两个adc各有1个通道，都由tim2定时触发，频率2M；dma使用半传输完成中断，每个adc有两个buffer，长度为100，交替存储数据；adc1使用dma1_stream0，adc2使用dma1_stream1，但是dma1_stream1中断没有开，在dma1_stream0中断中拷取两个adc的值，异常值刚好就是每100个点左右就会出现，求各位大佬看看。
adc1的配置：
void MX_ADC1_Init(void)
{
/* USER CODE BEGIN ADC1_Init 0 */
/* USER CODE END ADC1_Init 0 */
ADC_MultiModeTypeDef multimode = {0};
ADC_ChannelConfTypeDef sConfig = {0};
/* USER CODE BEGIN ADC1_Init 1 */
/* USER CODE END ADC1_Init 1 */
/** Common config
*/
hadc1.Instance = ADC1;
hadc1.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV2;
hadc1.Init.Resolution = ADC_RESOLUTION_12B;
hadc1.Init.ScanConvMode = ADC_SCAN_DISABLE;
hadc1.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
hadc1.Init.LowPowerAutoWait = DISABLE;
hadc1.Init.ContinuousConvMode = DISABLE;
hadc1.Init.NbrOfConversion = 1;
hadc1.Init.DiscontinuousConvMode = DISABLE;
hadc1.Init.ExternalTrigConv = ADC_EXTERNALTRIG_T2_TRGO;
hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_RISING;
hadc1.Init.ConversionDataManagement = ADC_CONVERSIONDATA_DMA_CIRCULAR;
hadc1.Init.Overrun = ADC_OVR_DATA_PRESERVED;
hadc1.Init.LeftBitShift = ADC_LEFTBITSHIFT_NONE;
hadc1.Init.OversamplingMode = DISABLE;
if (HAL_ADC_Init(&hadc1) != HAL_OK)
{
Error_Handler();
}
/** Configure the ADC multi-mode
*/
multimode.Mode = ADC_MODE_INDEPENDENT;
if (HAL_ADCEx_MultiModeConfigChannel(&hadc1, &multimode) != HAL_OK)
{
Error_Handler();
}
/** Configure Regular Channel
*/
sConfig.Channel = ADC_CHANNEL_3;
sConfig.Rank = ADC_REGULAR_RANK_1;
sConfig.SamplingTime = ADC_SAMPLETIME_2CYCLES_5;
sConfig.SingleDiff = ADC_SINGLE_ENDED;
sConfig.OffsetNumber = ADC_OFFSET_NONE;
sConfig.Offset = 0;
if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN ADC1_Init 2 */
LL_ADC_SetBoostMode(hadc1.Instance,LL_ADC_BOOST_MODE_50MHZ);
/* USER CODE END ADC1_Init 2 */
}
adc2的配置：
void MX_ADC2_Init(void)
{
/* USER CODE BEGIN ADC2_Init 0 */
/* USER CODE END ADC2_Init 0 */
ADC_ChannelConfTypeDef sConfig = {0};
/* USER CODE BEGIN ADC2_Init 1 */
/* USER CODE END ADC2_Init 1 */
/** Common config
*/
hadc2.Instance = ADC2;
hadc2.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV2;
hadc2.Init.Resolution = ADC_RESOLUTION_12B;
hadc2.Init.ScanConvMode = ADC_SCAN_DISABLE;
hadc2.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
hadc2.Init.LowPowerAutoWait = DISABLE;
hadc2.Init.ContinuousConvMode = DISABLE;
hadc2.Init.NbrOfConversion = 1;
hadc2.Init.DiscontinuousConvMode = DISABLE;
hadc2.Init.ExternalTrigConv = ADC_EXTERNALTRIG_T2_TRGO;
hadc2.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_RISING;
hadc2.Init.ConversionDataManagement = ADC_CONVERSIONDATA_DMA_CIRCULAR;
hadc2.Init.Overrun = ADC_OVR_DATA_PRESERVED;
hadc2.Init.LeftBitShift = ADC_LEFTBITSHIFT_NONE;
hadc2.Init.OversamplingMode = DISABLE;
if (HAL_ADC_Init(&hadc2) != HAL_OK)
{
Error_Handler();
}
/** Configure Regular Channel
*/
sConfig.Channel = ADC_CHANNEL_18;
sConfig.Rank = ADC_REGULAR_RANK_1;
sConfig.SamplingTime = ADC_SAMPLETIME_2CYCLES_5;
sConfig.SingleDiff = ADC_SINGLE_ENDED;
sConfig.OffsetNumber = ADC_OFFSET_NONE;
sConfig.Offset = 0;
if (HAL_ADC_ConfigChannel(&hadc2, &sConfig) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN ADC2_Init 2 */
LL_ADC_SetBoostMode(hadc2.Instance,LL_ADC_BOOST_MODE_50MHZ);
/* USER CODE END ADC2_Init 2 */
}
tim2的配置：
void MX_TIM2_Init(void)
{
/* USER CODE BEGIN TIM2_Init 0 */
/* USER CODE END TIM2_Init 0 */
TIM_ClockConfigTypeDef sClockSourceConfig = {0};
TIM_MasterConfigTypeDef sMasterConfig = {0};
/* USER CODE BEGIN TIM2_Init 1 */
/* USER CODE END TIM2_Init 1 */
htim2.Instance = TIM2;
htim2.Init.Prescaler = 11;
htim2.Init.CounterMode = TIM_COUNTERMODE_UP;
htim2.Init.Period = 9;
htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
htim2.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_ENABLE;
if (HAL_TIM_Base_Init(&htim2) != HAL_OK)
{
Error_Handler();
}
sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
if (HAL_TIM_ConfigClockSource(&htim2, &sClockSourceConfig) != HAL_OK)
{
Error_Handler();
}
sMasterConfig.MasterOutputTrigger = TIM_TRGO_UPDATE;
sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
if (HAL_TIMEx_MasterConfigSynchronization(&htim2, &sMasterConfig) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN TIM2_Init 2 */
/* USER CODE END TIM2_Init 2 */
}
dma_stream0中断拷贝数据的部分代码：
if(__HAL_DMA_GET_FLAG(&hdma_adc1,DMA_FLAG_TCIF0_4)!=RESET)
{
__HAL_DMA_CLEAR_FLAG(&hdma_adc1,DMA_FLAG_TCIF0_4);//清除DMA传输完成中断标志位
if(g_adc1dma_first_flag==0xaa)
{
if (DMA1_Stream0->CR &(1 << 19))//buf0已满,正常处理buf1
{
memcpy((void *)&TrwaveSample[0][tw_sit],AdcDmaBuf0_0,sizeof(uint16_t)*ADCDMA_LEN);
memcpy((void *)&TrwaveSample[1][tw_sit],AdcDmaBuf1_0,sizeof(uint16_t)*ADCDMA_LEN);
g_TwaveSave_sit++;
if(g_TwaveSave_sit >= TWAVESAMPLE_SITMAX)
{
g_TwaveSave_sit = 0;
}
}
else //buf1已满,正常处理buf0
{
memcpy((void *)&TrwaveSample[0][tw_sit],AdcDmaBuf0_1,sizeof(uint16_t)*ADCDMA_LEN);
memcpy((void *)&TrwaveSample[1][tw_sit],AdcDmaBuf1_1,sizeof(uint16_t)*ADCDMA_LEN);
g_TwaveSave_sit++;
if(g_TwaveSave_sit >= TWAVESAMPLE_SITMAX)
{
g_TwaveSave_sit = 0;
}
}
}
else
{
g_adc1dma_first_flag=0xaa;
return;
}
/*以下为数据处理*/
}
adc不加信号时的波形
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发表于 2024-11-25 15:06:04
楼主
发表于 2024-11-26 07:55:28
