Changes

=== 26pin 的 UART 测试 test ===1) In Android 中默认只打开了 default, the UART0 一个串口，UART0 在 serial port is only opened. The position of UART0 at 26pin 的位置如下图所示， 对应的设备节点是'''is shown in the figure below. The corresponding device node is/dev/ttyS0'''ttys0<br><br>

2) 首先点击 wiringOP 图标打开 wiringOP APPFirst click the WiringOP icon to open the Wiringop App<br><br>

3) wiringOP The main interface of the WiringOP APP 的主界面显示如下图所示，然后点击 '''is displayed as shown in the figure below, and then click the UART_TEST''' 按钮打开UART测试界面button to open the UART test interface<br><br>

4) The serial test interface of the APP 的串口测试界面如下图所示is shown in the figure below<br><br>

5) 接着在编辑框中输入想要设置的波特率，然后点击 '''Then enter the baud rate you want to set in the editing box, and then click the OPEN''' 按钮打开'''button to open the/dev/ttyS0''' 节点，打开成功后，'''node. After successful, the OPEN''' 按钮变为不可选中状态，'''button becomes an optional state.The CLOSE''' 按钮和 '''button and the SEND''' 按钮变为可选中状态button become an optional state<br><br>

6) 然后使用杜邦线短接 uart0 的 Then use the DuPont line to shorte the RXD 和 and TXD 引脚pin of uart0<br><br>

7) 然后可以在下面的发送编辑框中输入一段字符，点击 '''Then you can enter a section of characters in the editing box below, click the SEND''' 按钮开始发送button to start sending<br><br>

8) 如果一切正常，接收框内会显示已接收到的字符串If everything is normal, the receiving string will be displayed in the receiving box<br><br>