Orange Pi 3B - Revision history

Admin: /* Interface details of Orange Pi 3B */

2023-08-24T01:06:54Z

‎Interface details of Orange Pi 3B

Admin: /* How to install and use Wiringop-Python */

2023-08-23T05:56:05Z

‎How to install and use Wiringop-Python

Admin: /* PWM test method */

2023-08-23T05:53:15Z

‎PWM test method

Admin: /* 40pin UART test */

2023-08-23T05:45:46Z

‎40pin UART test

Admin: /* 40pin I2C Test */

2023-08-23T05:43:05Z

‎40pin I2C Test

Admin: /* 40pin I2C Test */

2023-08-23T05:42:35Z

‎40pin I2C Test

Admin: /* 40pin SPI Test */

2023-08-22T07:35:55Z

‎40pin SPI Test

Admin: /* 40pin SPI Test */

2023-08-22T07:34:45Z

‎40pin SPI Test

Admin: /* 40pin SPI Test */

2023-08-22T07:34:19Z

‎40pin SPI Test

Admin: /* 40pin SPI Test */

2023-08-21T06:44:59Z

‎40pin SPI Test

@@ Line 190: / Line 190: @@
 |-
+|
-<big>'''The diameter of the four positioning holes is 3.0mm, and the diameter of the M.2 PICE device fixing hole is 3.5mm.'''</big>
+<big>'''The diameter of the four positioning holes is 2.7mm, and the diameter of the M.2 PICE device fixing hole is 2.9mm.'''</big>
 |}

@@ Line 5,590: / Line 5,590: @@
 <span id="how-to-install-and-use-wiringop-python"></span>
-== How to install and use Wiringop-Python ==
+== How to install and use wiringOP-Python ==
 {| class="wikitable" style="background-color:#ffffdc;width:800px;"
 |-
+|
-<big>'''Wiringop-Python is the library of the Python language version of Wiringop. It is used to operate the development board's GPIO, I2C, SPI and UART hardware resources such as the development board in the Python program.'''
+<big>'''wiringOP-Python is the Python language version of wiringOP, which is used to operate the hardware resources of the development board, such as GPIO, I2C, SPI and UART, in the Python program.'''
-'''Please note that all the following command below is operated under the <span style="color:#FF0000">root</span> user.'''</big>
+'''In addition, please note that all the following commands are operated under the root user.'''</big>
 |}
 <span id="wiringop-python-installation-method"></span>
-=== Wiringop-Python installation method ===
+=== wiringOP-Python installation method ===
 # First install the dependency package
@@ Line 5,619: / Line 5,619: @@
 |-
+|
-<big>'''Note that the following git clone--recursivee command will automatically download the source code of Wiringop, because Wiringop-Python depends on Wiringop. Please make sure that the download process does not report an error due to network problems.'''
+<big>'''Note that the following git clone--recursivee command will automatically download the source code of wiringOP, because wiringOP-Python depends on wiringOP. Please make sure that the download process does not report an error due to network problems.'''
-'''If there is a problem with the download code from GitHub, you can use the Wiringop-Python source code that comes with the Linux image directly, and the storage location is:/usr/src/wiringOP-Python'''</big>
+'''If there is a problem with the download code from GitHub, you can use the wiringOP-Python source code that comes with the Linux image directly, and the storage location is:/usr/src/wiringOP-Python'''</big>
 |}
 {| class="wikitable" style="width:800px;"
@@ Line 5,676: / Line 5,676: @@
 </ol>
 <ol start="5" style="list-style-type: decimal;">
-<li><p>Test whether the Wiringop-Python is installed successfully under the Python command line is shown below: </p>
+<li><p>Test whether the wiringOP-Python is installed successfully under the Python command line is shown below:</p>
 <ol style="list-style-type: lower-alpha;">
 <li>First use the Python3 command to enter the command line mode of Python3</li>
@@ Line 5,694: / Line 5,694: @@
 </ol>
 <ol start="3" style="list-style-type: lower-alpha;">
-<li>Enter the following command to view the help information of Wiringop-Python, and press the '''q''' key to exit the interface of the help information</li>
+<li>Enter the following command to view the help information of wiringOP-Python, and press the '''q''' key to exit the interface of the help information</li>
 {| class="wikitable" style="width:800px;"
 |-
@@ Line 5,752: / Line 5,752: @@
 |-
+|
-<big>'''Wiringop-Python is the same as Wiringop. You can also determine which GPIO pink can be determined by specifying the WPI number. Because there is no command to check the WPI number in Wiringop-Python, you can only check the board WPI number and physical physical physics through the GPIO command in Wiringop. The corresponding relationship of the pin.'''</big>
+<big>'''wiringOP-Python is the same as wiringOP, you can also determine which GPIO pin to operate by specifying the wPi number, because there is no command to check the wPi number in wiringOP-Python, so you can only check the board wPi number and physical Correspondence between pins.'''</big>
 <div class="figure">

@@ Line 5,518: / Line 5,518: @@
 # From the table below, the pwm11 available for Orange Pi 3B
-::[[File:pi3b-img270.png]]
+::[[File:pi3b-img270-1.png]]
-::{| class="wikitable" style="width:800px;"
+<ol start="2" style="list-style-type: decimal;">
 |-
+|
-'''In the Linux system, the pwm in 40pin is closed by default, and it needs to be opened manually to use..'''
+<p>orangepi@orangepi:~$ '''sudo orangepi-config'''</p>
 |}
-<ol start="2" style="list-style-type: decimal;">
+<ol start="3" style="list-style-type: decimal;">
-<li>After opening a pwm, a pwmchipX (X is a specific number) will be available in'''/sys/class/pwm/'''</li>
+<li>After opening a pwm, there will be an extra pwmchipX in '''/sys/class/pwm/''' (X is a specific number), for example, after opening pwm11, check the pwmchipX under '''/sys/class/pwm/''' one becomes two</li>
 {| class="wikitable" style="width:800px;"
 |-
@@ Line 5,544: / Line 5,561: @@
 |}
 </ol>
-<ol start="3" style="list-style-type: decimal;">
+<ol start="4" style="list-style-type: decimal;">
-<li><p>Which pwmchip corresponds to pwm11 above? Let's first check out the output of '''ls /sys/class/pwm/ -l''' command, as shown below: </p></li>
+<li><p>Which pwmchip above corresponds to pwm11, let's check the output of the '''ls /sys/class/pwm/ -l''' command first, as shown below:</p></li>
-<li><p>The base address of the pwm11 register is Fe6F0030. Then see the output of '''ls /sys/class/pwm/ -l''' command, you can see that the fe6f0030.pwm is connected to the pwmchip1, so the PWM11 corresponding pwmchip is pwmchip1</p></li>
+<li><p>Then it can be known from the table below that the base address of the pwm11 register is fe6f0030, and then look at the output of the '''ls /sys/class/pwm/ -l''' command, you can see that pwmchip1 is linked to fe6f0030.pwm, so pwm11 corresponds to pwmchip as pwmchip1</p></li>
 <div class="figure">
@@ Line 5,553: / Line 5,570: @@
 </div></ol>
-<ol start="5" style="list-style-type: decimal;">
+<ol start="6" style="list-style-type: decimal;">
-<li>Then use the following command to allow pwm11 to output a 50Hz square wave (please switch to the root user first, and then execute the following command)</li>
+<li>Then use the following command to make pwm11 output a 50Hz square wave (please switch to the root user first, and then execute the following command)</li>
 {| class="wikitable" style="width:800px;"
 |-
@@ Line 5,568: / Line 5,585: @@
 [[File:pi3b-img272.png]]
 </ol>
 <span id="how-to-install-and-use-wiringop-python"></span>

@@ Line 5,367: / Line 5,367: @@
 # As can be seen from the table below, the uart available for Orange Pi 3B is uart3, uart7, and uart9. There are three sets of uart bus
-::[[File:pi3b-img268.png]]
+::[[File:pi3b-img268-1.png]]
 ::{| class="wikitable" style="background-color:#ffffdc;width:800px;"
@@ Line 5,374: / Line 5,374: @@
 <big>'''As can be seen from the above table, i2c3_m0 and uart3_m0 are reused by pins, and the two cannot be opened at the same time'''</big>
 |}
-::{| class="wikitable" style="background-color:#ffffdc;width:800px;"
 |-
+|
-<big>'''In the Linux system, the uart in 40pin is closed by default, and it needs to be opened manually to use.'''</big>
+<p>orangepi@orangepi:~$ '''sudo orangepi-config'''</p>
 |}
-<ol start="2" style="list-style-type: decimal;">
+<ol start="3" style="list-style-type: decimal;">
 <li>After entering the Linux system, first confirm whether there is a device node corresponding to uart under/dev</li>
@@ Line 5,399: / Line 5,417: @@
 |}
 </ol>
-<ol start="3" style="list-style-type: decimal;">
+<ol start="4" style="list-style-type: decimal;">
 <li>Then start testing the uart interface, first use the rx and tx of the uart interface to be tested by DuPont</li>
@@ Line 5,417: / Line 5,435: @@
 |Corresponding to the 27 pin
 |Corresponding to the 15 pin
-|Corresponding to the 7 pin
+|Corresponding to the 22 pin
 |}
-[[File:pi3b-img269.png]]
+[[File:pi3b-img269-1.png]]
 </ol>
-<ol start="4" style="list-style-type: decimal;">
+<ol start="5" style="list-style-type: decimal;">
 <li><p>Use the '''gpio serial''' command to test the loop function of the serial port as shown below. If you can see the following printing, it means that the serial communication is normal</p>
 <ol style="list-style-type: lower-alpha;">

@@ Line 5,260: / Line 5,260: @@
 # From the table below, the I2C available for Orange Pi 3B is I2C2, I2C3, and I2C4 a total of three groups of I2C bus.
-::[[File:pi3b-img266.png]]
+::[[File:pi3b-img266-1.png]]
 ::{| class="wikitable" style="background-color:#ffffdc;width:800px;"

@@ Line 5,205: / Line 5,205: @@
 <ol start="3" style="list-style-type: decimal;">
-<li>First check whether there is a '''spidev3.0''' device node in the Linux system. If it exists, it means that the SPI3 has been set. You can use it directly</li>
+<li>After restarting, enter the system to check whether there is a spidev3.0 device node in the Linux system. If it exists, it means that SPI3 has been set up and can be used directly</li>
 {| class="wikitable" style="width:800px;"
@@ Line 5,216: / Line 5,216: @@
 </ol>
 <ol start="4" style="list-style-type: decimal;">
-<li>Do not shorten the two pins of the SPI3 MOSI and MISO, and run the output result of the spidev_test as shown below. You can see that the data of TX and RX is inconsistent</li>
+<li>Do not short-circuit the mosi and miso pins of SPI3, the output result of running spidev_test is as follows, you can see that the data of TX and RX are inconsistent</li>
 {| class="wikitable" style="width:800px;"
@@ Line 5,235: / Line 5,235: @@
 </ol>
 <ol start="5" style="list-style-type: decimal;">
-<li>Then the two pins of the SPI3 MOSI (No. 19 pins in the 40pin interface) and MISO (No. 21 in the 40PIN interface) run the output of SPIDEV_TEST as follows.You can see that sending and receiving data is the same.</li>
+<li>Then short-circuit the two pins of mosi (pin 19 in the 40pin interface) and miso (pin 21 in the 40pin interface) of SPI3, and then run the output of spidev_test as follows, you can see the sending and receiving same data</li>
 [[File:pi3b-img265.png]]

@@ Line 5,173: / Line 5,173: @@
 ::[[File:pi3b-img264-1.png]]
-::{| class="wikitable" style="background-color:#ffffdc;width:800px;"
+<ol start="1" style="list-style-type: decimal;">
 |-
+|
-<big>'''In the Linux system, the SPI3 in 40pin is closed by default, and it needs to be opened manually to use.'''
+<p>orangepi@orangepi:~$ '''sudo orangepi-config'''</p>
 |}
 <ol start="2" style="list-style-type: decimal;">

@@ Line 5,171: / Line 5,171: @@
 # From the schematic diagram of the 40PIN interface, the SPI available for Orange Pi 3B is spi3
-::[[File:pi3b-img264.png]]
+::[[File:pi3b-img264-1.png]]
 ::{| class="wikitable" style="background-color:#ffffdc;width:800px;"