[drivers][serial V1]poll tx 增加异常退出机制

components/drivers/include/drivers/serial.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2006-2023, RT-Thread Development Team
+ * Copyright (c) 2006-2024, RT-Thread Development Team
  *
  * SPDX-License-Identifier: Apache-2.0
  *
@@ -85,8 +85,8 @@
 #define RT_SERIAL_TX_DATAQUEUE_SIZE     2048
 #define RT_SERIAL_TX_DATAQUEUE_LWM      30
 
-#define RT_SERIAL_FLOWCONTROL_CTSRTS     1
-#define RT_SERIAL_FLOWCONTROL_NONE       0
+#define RT_SERIAL_FLOWCONTROL_CTSRTS    1
+#define RT_SERIAL_FLOWCONTROL_NONE      0
 
 /* Default config for serial_configure structure */
 #define RT_SERIAL_CONFIG_DEFAULT           \

components/drivers/serial/serial.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2006-2023, RT-Thread Development Team
+ * Copyright (c) 2006-2024, RT-Thread Development Team
  *
  * SPDX-License-Identifier: Apache-2.0
  *
@@ -278,7 +278,9 @@ rt_inline int _serial_poll_tx(struct rt_serial_device *serial, const rt_uint8_t
             serial->ops->putc(serial, '\r');
         }
 
-        serial->ops->putc(serial, *data);
+        if(serial->ops->putc(serial, *data) < 0) {
+            break;
+        }
 
         ++ data;
         -- length;