lg026 uart5 rx dma 如何配置

wangcharley

如题，使用下面这两个函数配置后，无法正确接收到数据

1. void MF_DMA_FL_DMA_CHANNEL_4_Channel4_Init(void)
   
2. {
   
3.     FL_DMA_InitTypeDef DMA_InitStruct;
   
4. 
   
5.     DMA_InitStruct.circMode = FL_DISABLE;
   
6.     DMA_InitStruct.dataSize = FL_DMA_BANDWIDTH_8B;
   
7.     DMA_InitStruct.direction = FL_DMA_DIR_PERIPHERAL_TO_RAM;
   
8.     DMA_InitStruct.periphAddress = FL_DMA_PERIPHERAL_FUNCTION6;
   
9.     DMA_InitStruct.priority = FL_DMA_PRIORITY_LOW;
   
10.     DMA_InitStruct.memoryAddressIncMode = FL_DMA_MEMORY_INC_MODE_INCREASE;
    
11.     DMA_InitStruct.flashAddressIncMode = FL_DMA_CH7_FLASH_INC_MODE_INCREASE;
    
12. 
    
13.     FL_DMA_Init(DMA, &DMA_InitStruct, FL_DMA_CHANNEL_4);
    
14. 
    
15.     FL_DMA_ClearFlag_TransferComplete(DMA, FL_DMA_CHANNEL_4);
    
16.     FL_DMA_EnableIT_TransferComplete(DMA, FL_DMA_CHANNEL_4);
    
17. 
    
18.     FL_UART_SetTXIFMode(UART5,FL_UART_TXIF_MODE_AFTER_DMA);
    
19. }
    

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1. void MF_UART5_Init(void)
   
2. {
   
3.     FL_GPIO_InitTypeDef GPIO_InitStruct;
   
4. 
   
5.     FL_UART_InitTypeDef UART5_InitStruct;
   
6. 
   
7.     /* PC4 UART5_RX */
   
8.     GPIO_InitStruct.pin = FL_GPIO_PIN_4;
   
9.     GPIO_InitStruct.mode = FL_GPIO_MODE_DIGITAL;
   
10.     GPIO_InitStruct.outputType = FL_GPIO_OUTPUT_PUSHPULL;
    
11.     GPIO_InitStruct.pull = FL_DISABLE;
    
12.     GPIO_InitStruct.remapPin = FL_DISABLE;
    
13.     GPIO_InitStruct.analogSwitch = FL_DISABLE;
    
14.     FL_GPIO_Init(GPIOC, &GPIO_InitStruct);
    
15. 
    
16.     /* PC5 UART5_TX */
    
17.     GPIO_InitStruct.pin = FL_GPIO_PIN_5;
    
18.     GPIO_InitStruct.mode = FL_GPIO_MODE_DIGITAL;
    
19.     GPIO_InitStruct.outputType = FL_GPIO_OUTPUT_PUSHPULL;
    
20.     GPIO_InitStruct.pull = FL_DISABLE;
    
21.     GPIO_InitStruct.remapPin = FL_DISABLE;
    
22.     GPIO_InitStruct.analogSwitch = FL_DISABLE;
    
23.     FL_GPIO_Init(GPIOC, &GPIO_InitStruct);
    
24. 
    
25.     UART5_InitStruct.clockSrc = NULL;
    
26.     UART5_InitStruct.baudRate = 4800;
    
27.     UART5_InitStruct.transferDirection = FL_UART_DIRECTION_TX_RX;
    
28.     UART5_InitStruct.dataWidth = FL_UART_DATA_WIDTH_8B;
    
29.     UART5_InitStruct.stopBits = FL_UART_STOP_BIT_WIDTH_1B;
    
30.     UART5_InitStruct.parity = FL_UART_PARITY_EVEN;
    
31. 
    
32.     FL_UART_Init(UART5, &UART5_InitStruct);
    
33. }

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顾博文

没看出啥问题，首先单独调试uart 是否能收到，然后加上dma再调试