Visitor II
April 28, 2019
Question
STM32H7: ADC conversion with transfer by DMA: HAL_ADC_Start_DMA , Destination Buffer address don't get result
- April 28, 2019
- 1 reply
- 845 views
ADC:
ADC1_Handler.Instance = ADC1;
ADC1_Handler.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV4; //4·ÖƵ£¬ADCCLK=PER_CK/4=64/4=16MHZ
ADC1_Handler.Init.Resolution = ADC_RESOLUTION_12B; //16λģʽ
ADC1_Handler.Init.ScanConvMode = ENABLE; //·ÇɨÃèģʽ
ADC1_Handler.Init.EOCSelection = ADC_EOC_SINGLE_CONV; //¹Ø±ÕEOCÖ�?¶�?
ADC1_Handler.Init.LowPowerAutoWait = DISABLE; //×Ô¶¯µ�?¹¦ºÄ¹Ø±Õ
ADC1_Handler.Init.ContinuousConvMode= ENABLE; //¹Ø±Õ�?¬�?øת»»
ADC1_Handler.Init.NbrOfConversion = 1; //1¸öת»»ÔÚ¹æÔò�?ò�?�?Ö�? Ò²¾�?ÊÇֻת»»¹æÔò�?ò�?�?1
ADC1_Handler.Init.DiscontinuousConvMode = DISABLE; //½ûÖ¹²»�?¬�?ø²ÉÑùģʽ
ADC1_Handler.Init.NbrOfDiscConversion = 0; //²»�?¬�?ø²ÉÑù�?¨µÀÊýΪ0
ADC1_Handler.Init.ExternalTrigConv = ADC_SOFTWARE_START; //Èí¼þ´¥·¢
ADC1_Handler.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;//ʹÓÃÈí¼þ´¥·¢
ADC1_Handler.Init.BoostMode = ENABLE; //BOOTģʽ¹Ø±Õ
ADC1_Handler.Init.Overrun = ADC_OVR_DATA_OVERWRITTEN; //Ó�?�?µÄÊý¾�?µÄËÀºóÖ±½Ó¸²¸Çµô¾ÉÊý¾�?
ADC1_Handler.Init.OversamplingMode = DISABLE; //¹ý²ÉÑù¹Ø±Õ
ADC1_Handler.Init.ConversionDataManagement = ADC_CONVERSIONDATA_DR; //¹æÔò�?¨µÀµÄÊý¾�?½ö½ö±£´æÔÚDR¼Ä´æÆ÷ÀïÃæ
HAL_ADC_Init(&ADC1_Handler); //³õʼ»¯
HAL_ADCEx_Calibration_Start(&ADC1_Handler,ADC_CALIB_OFFSET,ADC_SINGLE_ENDED); //ADC�?£×¼
ADC1_ChanConf.Channel = ADC_CHANNEL_19; //�?¨µÀ
ADC1_ChanConf.Rank = ADC_REGULAR_RANK_1; //1¸ö�?ò�?�?
ADC1_ChanConf.SamplingTime = ADC_SAMPLETIME_64CYCLES_5; //²ÉÑùʱ¼ä
ADC1_ChanConf.SingleDiff = ADC_SINGLE_ENDED; //µ¥±ß²É¼¯
ADC1_ChanConf.OffsetNumber = ADC_OFFSET_NONE;
ADC1_ChanConf.Offset = 0;
HAL_ADC_ConfigChannel(&ADC1_Handler,&ADC1_ChanConf); //�?¨µÀÅäÖÃDMA:
UART1TxDMA_Handler.Instance = DMA_Streamx; //Êý¾�?�?÷Ñ¡Ôñ
UART1TxDMA_Handler.Init.Request = DMA_REQUEST_ADC1; //USART1·¢Ë�?DMA
UART1TxDMA_Handler.Init.Direction = DMA_PERIPH_TO_MEMORY; //´æ´¢Æ÷µ½�?âÉè
UART1TxDMA_Handler.Init.PeriphInc = DMA_PINC_DISABLE; //�?âÉè·ÇÔö�?¿Ä£Ê½
UART1TxDMA_Handler.Init.MemInc = DMA_MINC_ENABLE; //´æ´¢Æ÷Ôö�?¿Ä£Ê½
UART1TxDMA_Handler.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD; //�?âÉèÊý¾�?³¤¶È:8λ
UART1TxDMA_Handler.Init.MemDataAlignment = DMA_PDATAALIGN_HALFWORD; //´æ´¢Æ÷Êý¾�?³¤¶È:8λ
UART1TxDMA_Handler.Init.Mode = DMA_CIRCULAR; //�?âÉè�?÷¿Øģʽ
UART1TxDMA_Handler.Init.Priority = DMA_PRIORITY_HIGH; //Ö�?µÈÓÅ�?ȼ¶
UART1TxDMA_Handler.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
UART1TxDMA_Handler.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_FULL;
UART1TxDMA_Handler.Init.MemBurst = DMA_MBURST_SINGLE; //´æ´¢Æ÷�?»·¢µ¥´Î´«Êä
UART1TxDMA_Handler.Init.PeriphBurst = DMA_PBURST_SINGLE; //�?âÉè�?»·¢µ¥´Î´«Êä
HAL_DMA_DeInit(&UART1TxDMA_Handler);
HAL_DMA_Init(&UART1TxDMA_Handler);
__HAL_LINKDMA(&ADC1_Handler,DMA_Handle,UART1TxDMA_Handler); //½«DMAÓëUSART1�?ª�?µÆðÀ´(·¢Ë�?DMA)hope you can help me !
Thank you!