hal_uart: add some details

2022-09-29 11:55:58 +08:00
parent 7cc072bdab
commit affe5574ec
1 changed files with 2 additions and 0 deletions
--- a/platform/hal/st/stm32l4xx/src/tos_hal_uart.c
+++ b/platform/hal/st/stm32l4xx/src/tos_hal_uart.c
@@ -20,6 +20,8 @@ __API__ int tos_hal_uart_init(hal_uart_t *uart, hal_uart_port_t port)
    } else if (port == HAL_UART_PORT_3) {
        uart->private_uart = &huart3;
        MX_USART3_UART_Init();
+    } else {
+        return -1;
    }

    return 0;