求助DAC +DMA配置失败

2019-07-20 03:36发布

void DAC1_Init(void)
{
DAC_ChannelConfTypeDef DACCH1_Config;

DAC1_Handler.Instance=DAC;
HAL_DAC_Init(&DAC1_Handler); //3õê¼»ˉDAC

DACCH1_Config.DAC_Trigger=DAC_TRIGGER_T4_TRGO; //2»ê1óÃ′￥·￠1|Äü
DACCH1_Config.DAC_OutputBuffer=DAC_OUTPUTBUFFER_DISABLE;//DAC1êä3ö»o3å1Ø±Õ
HAL_DAC_ConfigChannel(&DAC1_Handler,&DACCH1_Config,DAC_CHANNEL_1);//DACí¨μà1ÅäÖÃ
HAL_DAC_Start_DMA(&DAC1_Handler,DAC_CHANNEL_1,(u32*)&DAC->DHR12R1,BUFFERSIZE,DAC_ALIGN_12B_R);
}

//DACμ×2ãÇy¶ˉ￡¬ê±ÖóÅäÖÃ￡¬òy½Å ÅäÖÃ
//′Ëoˉêy»á±»HAL_DAC_Init()μ÷óÃ
//hdac

AC¾ä±ú
void HAL_DAC_MspInit(DAC_HandleTypeDef* hdac)
{
GPIO_InitTypeDef GPIO_Initure;
__HAL_RCC_DAC_CLK_ENABLE();          //ê1ÄüDACê±Öó
__HAL_RCC_GPIOA_CLK_ENABLE();                      //¿aÆôGPIOAê±Öó

GPIO_Initure.Pin=GPIO_PIN_4;          //PA4
GPIO_Initure.Mode=GPIO_MODE_ANALOG;    //Ä￡Äa
GPIO_Initure.Pull=GPIO_NOPULL;       //2»′øéÏÏÂà-
HAL_GPIO_Init(GPIOA,&GPIO_Initure);
}

void MYDAC1DMA_Config(void)
{
__HAL_RCC_DMA1_CLK_ENABLE();//DMA2ê±Öóê1Äü

__HAL_LINKDMA(&DAC1_Handler,DMA_Handle1,DAC1DMA_Handler); //½«DMAóëUSART1áaÏμÆeà′(·￠ËíDMA)

//Tx DMAÅäÖÃ
DAC1DMA_Handler.Instance=DMA1_Stream5;                         //êy¾Yá÷Ñ¡Ôñ
DAC1DMA_Handler.Init.Channel=DMA_CHANNEL_7;                      //í¨μàÑ¡Ôñ
DAC1DMA_Handler.Init.Direction=DMA_MEMORY_TO_PERIPH;          //′æ′￠Æ÷μ½íaéè
DAC1DMA_Handler.Init.PeriphInc=DMA_PINC_DISABLE;                //íaéè·ÇÔöá¿Ä￡ê½
DAC1DMA_Handler.Init.MemInc=DMA_MINC_ENABLE;                   //′æ′￠Æ÷Ôöá¿Ä￡ê½
DAC1DMA_Handler.Init.PeriphDataAlignment=DMA_PDATAALIGN_HALFWORD; //íaéèêy¾Y3¤¶è:16Î»
DAC1DMA_Handler.Init.MemDataAlignment=DMA_PDATAALIGN_HALFWORD;    //′æ′￠Æ÷êy¾Y3¤¶è:16Î»
DAC1DMA_Handler.Init.Mode=DMA_CIRCULAR;                         //Ñ-»·Ä￡ê½
DAC1DMA_Handler.Init.Priority=DMA_PRIORITY_HIGH;             //¸ßóÅÏè¼¶
DAC1DMA_Handler.Init.FIFOMode=DMA_FIFOMODE_DISABLE;
DAC1DMA_Handler.Init.FIFOThreshold=DMA_FIFO_THRESHOLD_HALFFULL;
DAC1DMA_Handler.Init.MemBurst=DMA_MBURST_SINGLE;                //′æ′￠Æ÷í»·￠μ￥′Î′«êä
DAC1DMA_Handler.Init.PeriphBurst=DMA_PBURST_SINGLE;             //íaéèí»·￠μ￥′Î′«êä

HAL_DMA_DeInit(&DAC1DMA_Handler);
HAL_DMA_Init(&DAC1DMA_Handler);

            //********DMAË«»o3åéèÖÃ¿aê¼********
      __HAL_UNLOCK(&DAC1DMA_Handler);
      HAL_DMAEx_MultiBufferStart(&DAC1DMA_Handler,(u32)&DAC->DHR12R1,(u32)buf2,(u32)buf3,BUFFERSIZE);//¿aÆôË«»o3å                                                 //10usÑóê±￡¬·àÖ1-O2óÅ»ˉ3öÎêìa
__HAL_DMA_ENABLE_IT(&DAC1DMA_Handler,DMA_IT_TC);          //¿aÆô′«êäíê3éÖD¶Ï
            //********DMAË«»o3åéèÖÃ½áêø********

      HAL_NVIC_SetPriority(DMA1_Stream5_IRQn, 0, 1);
      HAL_NVIC_EnableIRQ(DMA1_Stream5_IRQn);
}
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