ADC DMA

[xia ditto]

Posted on January 15, 2018 at 14:27

I use STM32F767 series MCU，when i configure the single ADC DMA with external 200kHz trigger; The data size is right ，but data value  Error，Is my use legal?

RHEOSTAT_ADC_DMA_CLK_ENABLE();

DMA_Init_HandleMain.Instance = RHEOSTAT_ADC_DMA2_STREAM_Main;

DMA_Init_HandleMain.Init.Direction = DMA_PERIPH_TO_MEMORY;

DMA_Init_HandleMain.Init.PeriphInc = DMA_PINC_DISABLE;

DMA_Init_HandleMain.Init.MemInc = DMA_MINC_ENABLE;

DMA_Init_HandleMain.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD;

DMA_Init_HandleMain.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;

DMA_Init_HandleMain.Init.Mode = DMA_NORMAL;

DMA_Init_HandleMain.Init.Priority = DMA_PRIORITY_HIGH;

DMA_Init_HandleMain.Init.FIFOMode = DMA_FIFOMODE_DISABLE;

DMA_Init_HandleMain.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_FULL;

DMA_Init_HandleMain.Init.MemBurst = DMA_MBURST_SINGLE; DMA_Init_HandleMain.Init.PeriphBurst = DMA_PBURST_SINGLE;

DMA_Init_HandleMain.Init.Channel = RHEOSTAT_ADC_DMA2_CHANNEL_MAIN;

DMA_Init_HandleMain.Parent = (void *)&ADC_HandleMain; ADC_HandleMain.DMA_Handle = &DMA_Init_HandleMain; d_ADC_DMAInitStat = HAL_DMA_Init(ADC_HandleMain.DMA_Handle); HAL_NVIC_SetPriority(DMA2_Stream0_IRQn, 1, 0); HAL_NVIC_EnableIRQ(DMA2_Stream0_IRQn); RHEOSTAT_ADC_MAIN_CLK_ENABLE();

// ADC1

ADC_HandleMain.Instance = RHEOSTAT_ADC1; // 时钟为fpclk 4分频 ADC_HandleMain.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV4;

ADC_HandleMain.Init.Resolution = ADC_RESOLUTION_12B;

ADC_HandleMain.Init.ScanConvMode = DISABLE;

ADC_HandleMain.Init.ContinuousConvMode = DISABLE;

ADC_HandleMain.Init.DiscontinuousConvMode = DISABLE; ADC_HandleMain.Init.NbrOfDiscConversion = 0; ADC_HandleMain.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_RISING; ADC_HandleMain.Init.ExternalTrigConv = ADC_EXTERNALTRIGCONV_EXT_IT11; ADC_HandleMain.Init.DataAlign = ADC_DATAALIGN_RIGHT; ADC_HandleMain.Init.NbrOfConversion = 1; ADC_HandleMain.Init.DMAContinuousRequests = ENABLE; ADC_HandleMain.Init.EOCSelection = 1; HAL_ADC_Init(&ADC_HandleMain); ADC_Config.Channel = RHEOSTAT_ADC_CHANNEL_Main; ADC_Config.Rank = ADC_REGULAR_RANK_1; ADC_Config.SamplingTime = ADC_SAMPLETIME_3CYCLES;// 采样时间间�? ADC_Config.Offset = 0; d_ADC_DMAInitStat |= HAL_ADC_ConfigChannel(&ADC_HandleMain, &ADC_Config);