OrangePi Zero3: 26pin UART test

RU EN

Chapt 3. Instructions for use of Debian/Ubuntu Server and Xfce desktop system

Страница: 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122

Chapter 3 contents

3.18.5. 26pin UART test

1) According to the schematic diagram of the 26pin interface, the available uart is uart5

Img 3.128

2) uart5 is disabled by default in the Linux system, and it needs to be opened manually to use it. The steps to open are as follows:

a. First run orangepi-config, normal users remember to add sudo permission

orangepi@orangepi:~$ sudo orangepi-config

b. Then select System

Img 3.129

c. Then select Hardware

Img 3.130

d. Then use the arrow keys on the keyboard to navigate to the position shown in the figure below, and then use the space to select ph-uart5

Img 3.131

e. Then select 'Save' to save

Img 3.132

f. Then select 'Back'

Img 3.133

g. Then select 'Reboot' to restart the system to make the configuration take effect

Img 3.134

3) After entering the linux system, first confirm whether there is a uart5 device node under /dev

Note that the linux5.4 system is /dev/ttyAS5.

orangepi@orangepi:~$ ls /dev/ttyS5
/dev/ttyS5

4) Then start to test the uart5 interface, first use the DuPont line to short the rx and tx of the uart5 interface to be tested

uart5 tx pin Corresponding to pin 8 of 26pin rx pin Corresponding to pin 10 of 26pin

5) Use the gpio command in wiringOP to test the loopback function of the serial port as shown below. If you can see the following print, it means that the serial port communication is normal

orangepi@orangepi:~$ gpio serial /dev/ttyS5 orangepi@orangepi:~$ gpio serial /dev/ttyAS5
# linux-6.1 test command
# linux-5.4 test command
Out: 0: -> 0
Out: 1: -> 1
Out: 2: -> 2
Out: 3: -> 3^C

< >