STM32F103 串口5 UART5 无法使用问题，不能接收和发送数据。

发布于 2024-11-26 17:45:18 浏览：14 订阅该版

如题，串口1 2 3 4使用都没问题，但UART5的使用有问题，无法发送和接收数据。
board.c
```c
#define BSP_USING_UART1                       //DEBUG调试口
#define BSP_UART1_TX_PIN       "PA9"
#define BSP_UART1_RX_PIN       "PA10"

#define BSP_USING_UART2                       
#define BSP_UART2_TX_PIN       "PD5"
#define BSP_UART2_RX_PIN       "PD6"
#define BSP_UART2_RX_USING_DMA
#define BSP_UART2_TX_USING_DMA

#define BSP_USING_UART3                       
#define BSP_UART3_TX_PIN       "PB10"
#define BSP_UART3_RX_PIN       "PB11"
#define BSP_UART3_RX_USING_DMA
#define BSP_UART3_TX_USING_DMA

#define BSP_USING_UART4                       
#define BSP_UART4_TX_PIN       "PC10"
#define BSP_UART4_RX_PIN       "PC11"
#define BSP_UART4_RX_USING_DMA
#define BSP_UART4_TX_USING_DMA

#define BSP_USING_UART5                       
#define BSP_UART5_TX_PIN       "PC12"
#define BSP_UART5_RX_PIN       "PD2"
```
drv_usart.c

```c
   static const struct gpio_uart_remap uart_remaps[] =
       {
           /* usart1 configure */
           { .pin_index = GET_PIN(A, 9),  .normal_uart =  1, .remap_uart = -1 },
           { .pin_index = GET_PIN(A, 10), .normal_uart =  1, .remap_uart = -1 },
           { .pin_index = GET_PIN(B, 6),  .normal_uart = -1, .remap_uart =  1 },
           { .pin_index = GET_PIN(B, 7),  .normal_uart = -1, .remap_uart =  1 },

/* usart2 configure */
           { .pin_index = GET_PIN(A, 2),  .normal_uart =  2, .remap_uart = -1 },
           { .pin_index = GET_PIN(A, 3),  .normal_uart =  2, .remap_uart = -1 },
           { .pin_index = GET_PIN(D, 5),  .normal_uart = -1, .remap_uart =  2 },
           { .pin_index = GET_PIN(D, 6),  .normal_uart = -1, .remap_uart =  2 },

/* usart3 configure */
           { .pin_index = GET_PIN(B, 10), .normal_uart =  3, .remap_uart = -1 },
           { .pin_index = GET_PIN(B, 11), .normal_uart =  3, .remap_uart = -1 },
           { .pin_index = GET_PIN(D, 8),  .normal_uart = -1, .remap_uart =  3 },
           { .pin_index = GET_PIN(D, 9),  .normal_uart = -1, .remap_uart =  3 },
           /* usart4 configure */
           { .pin_index = GET_PIN(C, 10), .normal_uart =  4, .remap_uart =  -1 },
           { .pin_index = GET_PIN(C, 11), .normal_uart =  4, .remap_uart =  -1 },
           /* usart5 configure */
           { .pin_index = GET_PIN(C, 12), .normal_uart =  5, .remap_uart =  -1 },
           { .pin_index = GET_PIN(D, 2),  .normal_uart =  5, .remap_uart =  -1 },

};

```