RT-Thread-芯片STM32H7BVBT6，使用uart5作为控制台使用时，貌似有一处bugRT-Thread问答社区

芯片STM32H7BVBT6，使用uart5作为控制台使用时，貌似有一处bug

发布于 2022-04-26 16:15:52 浏览：741 订阅该版

使用uart5作为控制台时（MCU时STM32H7B0VBT6），发现串口未打印，最后在代码在drv_usart.c中（注释部分）发现一处bug，修改后就可以了，但不知道这算不算bug
```
static const struct gpio_uart_af uart_afs[] =
     {
         { .pin_index = GET_PIN(A,  0), .afs[0] = {.uart_num = UART_IS_TX|4, .af_num =  8}},
         { .pin_index = GET_PIN(A,  1), .afs[0] = {.uart_num = UART_IS_RX|4, .af_num =  8}},
         { .pin_index = GET_PIN(A,  2), .afs[0] = {.uart_num = UART_IS_TX|2, .af_num =  7}},
         { .pin_index = GET_PIN(A,  3), .afs[0] = {.uart_num = UART_IS_RX|2, .af_num =  7}},
         { .pin_index = GET_PIN(A,  9), .afs[0] = {.uart_num = UART_IS_TX|1, .af_num =  7}},
         { .pin_index = GET_PIN(A, 10), .afs[0] = {.uart_num = UART_IS_RX|1, .af_num =  7}},
         { .pin_index = GET_PIN(A, 11), .afs[0] = {.uart_num = UART_IS_TX|4, .af_num =  6}},
         { .pin_index = GET_PIN(A, 12), .afs[0] = {.uart_num = UART_IS_RX|4, .af_num =  6}},
         { .pin_index = GET_PIN(A, 15), .afs[0] = {.uart_num = UART_IS_RX|7, .af_num = 11}},
         { .pin_index = GET_PIN(A,  8), .afs[0] = {.uart_num = UART_IS_RX|7, .af_num = 11}},
         { .pin_index = GET_PIN(B,  4), .afs[0] = {.uart_num = UART_IS_TX|7, .af_num = 11}},
         { .pin_index = GET_PIN(B,  3), .afs[0] = {.uart_num = UART_IS_RX|7, .af_num = 11}},
         { .pin_index = GET_PIN(B,  5), .afs[0] = {.uart_num = UART_IS_TX|5, .af_num = 14}},
         { .pin_index = GET_PIN(B,  6), .afs[0] = {.uart_num = UART_IS_RX|5, .af_num = 14}},
         { .pin_index = GET_PIN(B,  6), .afs[0] = {.uart_num = UART_IS_TX|1, .af_num =  7}},
         { .pin_index = GET_PIN(B,  7), .afs[0] = {.uart_num = UART_IS_RX|1, .af_num =  7}},
         { .pin_index = GET_PIN(B,  9), .afs[0] = {.uart_num = UART_IS_TX|4, .af_num =  8}},
         { .pin_index = GET_PIN(B,  8), .afs[0] = {.uart_num = UART_IS_RX|4, .af_num =  8}},
         { .pin_index = GET_PIN(B, 10), .afs[0] = {.uart_num = UART_IS_TX|3, .af_num =  7}},
         { .pin_index = GET_PIN(B, 11), .afs[0] = {.uart_num = UART_IS_RX|3, .af_num =  7}},
         { .pin_index = GET_PIN(B, 13), .afs[0] = {.uart_num = UART_IS_TX|5, .af_num = 14}},
         { .pin_index = GET_PIN(B, 12), .afs[0] = {.uart_num = UART_IS_RX|5, .af_num = 14}},
         { .pin_index = GET_PIN(B, 14), .afs[0] = {.uart_num = UART_IS_TX|1, .af_num =  4}},
         { .pin_index = GET_PIN(B, 15), .afs[0] = {.uart_num = UART_IS_RX|1, .af_num =  4}},
         { .pin_index = GET_PIN(C,  6), .afs[0] = {.uart_num = UART_IS_TX|6, .af_num =  7}},
         { .pin_index = GET_PIN(C,  7), .afs[0] = {.uart_num = UART_IS_RX|6, .af_num =  7}},
         { .pin_index = GET_PIN(C, 10), .afs[0] = {.uart_num = UART_IS_TX|3, .af_num =  7}},
         { .pin_index = GET_PIN(C, 11), .afs[0] = {.uart_num = UART_IS_RX|3, .af_num =  7}},
         { .pin_index = GET_PIN(C, 10), .afs[0] = {.uart_num = UART_IS_TX|4, .af_num =  8}},
         { .pin_index = GET_PIN(C, 11), .afs[0] = {.uart_num = UART_IS_RX|4, .af_num =  8}},
         { .pin_index = GET_PIN(C, 12), .afs[0] = { .uart_num = UART_IS_TX|5, .af_num =  8}},   // 此处官方库中C12默认的是RX，应修改为TX
         { .pin_index = GET_PIN(D, 2),  .afs[0] = { .uart_num =
UART_IS_RX|5, .af_num =  8 }},  // 此处官方库中D2默认的是TX，应修改为RX
         { .pin_index = GET_PIN(D,  1), .afs[0] = {.uart_num = UART_IS_TX|4, .af_num =  8}},
         { .pin_index = GET_PIN(D,  0), .afs[0] = {.uart_num = UART_IS_RX|4, .af_num =  8}},
         { .pin_index = GET_PIN(D,  5), .afs[0] = {.uart_num = UART_IS_TX|2, .af_num =  7}},
         { .pin_index = GET_PIN(D,  6), .afs[0] = {.uart_num = UART_IS_RX|2, .af_num =  7}},
         { .pin_index = GET_PIN(D,  8), .afs[0] = {.uart_num = UART_IS_TX|3, .af_num =  7}},
         { .pin_index = GET_PIN(D,  9), .afs[0] = {.uart_num = UART_IS_RX|3, .af_num =  7}},
         { .pin_index = GET_PIN(E,  1), .afs[0] = {.uart_num = UART_IS_TX|8, .af_num =  8}},
         { .pin_index = GET_PIN(E,  0), .afs[0] = {.uart_num = UART_IS_RX|8, .af_num =  8}},
         { .pin_index = GET_PIN(E,  8), .afs[0] = {.uart_num = UART_IS_TX|7, .af_num =  7}},
         { .pin_index = GET_PIN(E,  7), .afs[0] = {.uart_num = UART_IS_RX|7, .af_num =  7}},
         { .pin_index = GET_PIN(F,  7), .afs[0] = {.uart_num = UART_IS_TX|7, .af_num =  7}},
         { .pin_index = GET_PIN(F,  6), .afs[0] = {.uart_num = UART_IS_RX|7, .af_num =  7}},
         { .pin_index = GET_PIN(G, 14), .afs[0] = {.uart_num = UART_IS_TX|6, .af_num =  7}},
         { .pin_index = GET_PIN(G,  9), .afs[0] = {.uart_num = UART_IS_RX|6, .af_num =  7}},
         { .pin_index = GET_PIN(H, 13), .afs[0] = {.uart_num = UART_IS_TX|4, .af_num =  8}},
         { .pin_index = GET_PIN(H, 14), .afs[0] = {.uart_num = UART_IS_RX|4, .af_num =  8}},
         { .pin_index = GET_PIN(G,  8), .afs[0] = {.uart_num = UART_IS_TX|8, .af_num =  8}},
         { .pin_index = GET_PIN(G,  9), .afs[0] = {.uart_num = UART_IS_RX|8, .af_num =  8}},
      };
```