From 12ec87d64ec53f2395269713b8bf62bdb522e795 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=B0=91=E5=B9=B4=E8=80=81=E7=8E=8B?= <710454786@qq.com>
Date: Wed, 30 Nov 2022 20:36:17 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E6=94=B9=E4=B8=B2=E5=8F=A3V2=E7=9A=84?=
 =?UTF-8?q?putc=E9=A1=BA=E5=BA=8F?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

1.顺序修改回V1,保证每次都是当前数据发送完才跳出
---
 bsp/stm32/libraries/HAL_Drivers/drv_usart_v2.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/bsp/stm32/libraries/HAL_Drivers/drv_usart_v2.c b/bsp/stm32/libraries/HAL_Drivers/drv_usart_v2.c
index 90b4d928c5..49fb0990a1 100644
--- a/bsp/stm32/libraries/HAL_Drivers/drv_usart_v2.c
+++ b/bsp/stm32/libraries/HAL_Drivers/drv_usart_v2.c
@@ -302,9 +302,9 @@ static int stm32_putc(struct rt_serial_device *serial, char c)
     RT_ASSERT(serial != RT_NULL);
 
     uart = rt_container_of(serial, struct stm32_uart, serial);
-    while (__HAL_UART_GET_FLAG(&(uart->handle), UART_FLAG_TC) == RESET);
     UART_INSTANCE_CLEAR_FUNCTION(&(uart->handle), UART_FLAG_TC);
     UART_SET_TDR(&uart->handle, c);
+    while (__HAL_UART_GET_FLAG(&(uart->handle), UART_FLAG_TC) == RESET);
 
     return 1;
 }
-- 
GitLab