From 13f7a142ea7271cffcfdb9247078031ed73dbe8a Mon Sep 17 00:00:00 2001
From: wuming_zi <1078249029@qq.com>
Date: Mon, 12 Aug 2024 05:18:05 +0000
Subject: [PATCH] =?UTF-8?q?update=20rt-thread-version/rt-thread-standard/p?=
 =?UTF-8?q?rogramming-manual/device/uart/uart=5Fv1/uart.md.=20=E6=8C=89?=
 =?UTF-8?q?=E8=A6=81=E6=B1=82=E5=88=A0=E9=99=A4=E5=9B=BE=E7=89=87=EF=BC=8C?=
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Signed-off-by: wuming_zi <1078249029@qq.com>
---
 .../device/uart/uart_v1/uart.md               | 37 ++++++++++++-------
 1 file changed, 24 insertions(+), 13 deletions(-)

diff --git a/rt-thread-version/rt-thread-standard/programming-manual/device/uart/uart_v1/uart.md b/rt-thread-version/rt-thread-standard/programming-manual/device/uart/uart_v1/uart.md
index 4977452..9efcd2c 100644
--- a/rt-thread-version/rt-thread-standard/programming-manual/device/uart/uart_v1/uart.md
+++ b/rt-thread-version/rt-thread-standard/programming-manual/device/uart/uart_v1/uart.md
@@ -579,24 +579,36 @@ static void serial_thread_entry(void *parameter)
 {
     struct rx_msg msg;
     rt_err_t result;
-    rt_uint32_t rx_length;
+    rt_uint32_t rx_length = 0;
     static char rx_buffer[RT_SERIAL_RB_BUFSZ + 1];
-
-    while (1)
+    char input;
+    while(1)
     {
-        rt_memset(&msg, 0, sizeof(msg));
-        /* 从消息队列中读取消息*/
         result = rt_mq_recv(&rx_mq, &msg, sizeof(msg), RT_WAITING_FOREVER);
-        if (result > 0)
+        if(result < 0)
+        {
+            rt_kprintf("mq recv err\n");
+        }
+
+        rt_device_read(msg.dev, 0, &input, 1);
+        rx_buffer[rx_length++] = input;
+        rt_kprintf("input: %c\n",input);
+
+        /* 以回车为缓冲区输出标志 */
+        if(input == '\r')
         {
-            /* 从串口读取数据*/
-            rx_length = rt_device_read(msg.dev, 0, rx_buffer, msg.size);
-            rx_buffer[rx_length] = '\0';
             /* 通过串口设备 serial 输出读取到的消息 */
-            rt_device_write(serial, 0, rx_buffer, rx_length);
+            rt_size_t size = rt_device_write(msg.dev, 0, rx_buffer, sizeof(rx_buffer));
+            if(size != sizeof(rx_buffer))
+            {
+                rt_kprintf("write err\n");
+            }
             /* 打印数据 */
-            rt_kprintf("%s\n",rx_buffer);
-        }
+            rt_kprintf("rx_buffer: %s\n", rx_buffer);
+            /* 重置初始量 */
+            rx_length = 0;
+            rt_memset((void*)rx_buffer, 0, sizeof(rx_buffer));
+        }  
     }
 }
 
@@ -786,4 +798,3 @@ static int uart_data_sample(int argc, char *argv[])
 MSH_CMD_EXPORT(uart_data_sample, uart device sample);
 
 ```
-
-- 
Gitee