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Update gpio_table
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Add gpiod control solution
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@Liu-Xiaoqiang
Liu-Xiaoqiang authored Feb 27, 2024
1 parent 6f3baef commit cca9d81
Showing 1 changed file with 57 additions and 23 deletions.
80 changes: 57 additions & 23 deletions docs/source/PCs/Pi/Software/Resources/gpio_table
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Original file line number Diff line number Diff line change
Expand Up @@ -3,29 +3,29 @@
:width: 100%
:widths: auto

+-----------------------------+-------------------------------+
| Function | Device Node |
+=============================+===============================+
| IN4 | /dev/chipsee-gpio8 |
+-----------------------------+-------------------------------+
| IN3 | /dev/chipsee-gpio7 |
+-----------------------------+-------------------------------+
| IN2 | /dev/chipsee-gpio6 |
+-----------------------------+-------------------------------+
| IN1 | /dev/chipsee-gpio5 |
+-----------------------------+-------------------------------+
| OUT4 | /dev/chipsee-gpio4 |
+-----------------------------+-------------------------------+
| OUT3 | /dev/chipsee-gpio3 |
+-----------------------------+-------------------------------+
| OUT2 | /dev/chipsee-gpio2 |
+-----------------------------+-------------------------------+
| OUT1 | /dev/chipsee-gpio1 |
+-----------------------------+-------------------------------+
| Isolated GND | NC |
+-----------------------------+-------------------------------+
| Isolated VDD(5V-24V) | NC |
+-----------------------------+-------------------------------+
+-----------------------------+-------------------------------+-------------+
| Function | Device Node | GPIOD line |
+=============================+===============================+=============+
| IN4 | /dev/chipsee-gpio8 | 3 |
+-----------------------------+-------------------------------+-------------+
| IN3 | /dev/chipsee-gpio7 | 2 |
+-----------------------------+-------------------------------+-------------+
| IN2 | /dev/chipsee-gpio6 | 1 |
+-----------------------------+-------------------------------+-------------+
| IN1 | /dev/chipsee-gpio5 | 0 |
+-----------------------------+-------------------------------+-------------+
| OUT4 | /dev/chipsee-gpio4 | 4 |
+-----------------------------+-------------------------------+-------------+
| OUT3 | /dev/chipsee-gpio3 | 5 |
+-----------------------------+-------------------------------+-------------+
| OUT2 | /dev/chipsee-gpio2 | 6 |
+-----------------------------+-------------------------------+-------------+
| OUT1 | /dev/chipsee-gpio1 | 7 |
+-----------------------------+-------------------------------+-------------+
| Isolated GND | NC | NC |
+-----------------------------+-------------------------------+-------------+
| Isolated VDD(5V-24V) | NC | NC |
+-----------------------------+-------------------------------+-------------+

* Control `OUT1` by setting it high or low
.. code:: bash
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.. code:: bash

$ cat /dev/chipsee-gpio5 // value 1 indicate high, value 0 indicate low

* Use libgpiod to control the GPIO
.. code:: bash

# uncomment the following lines in /opt/chipsee/chipsee-init.sh first
## GPIO
#num=1
#for i in $OUT; do
#[ ! -d /sys/class/gpio/gpio$i ] && echo $i > /sys/class/gpio/export
#echo out > /sys/class/gpio/gpio$i/direction
#chmod a+w /sys/class/gpio/gpio$i/value
#ln -sf /sys/class/gpio/gpio$i/value /dev/chipsee-gpio$num
#num=`expr $num + 1`
#done
#sleep 1
#for i in $IN; do
#[ ! -d /sys/class/gpio/gpio$i ] && echo $i > /sys/class/gpio/export
#echo in > /sys/class/gpio/gpio$i/direction
#chmod a+r /sys/class/gpio/gpio$i/value
#ln -sf /sys/class/gpio/gpio$i/value /dev/chipsee-gpio$num
#num=`expr $num + 1`
#done

# reboot to use libgpiod
$ sudo reboot

# install gpiod
$ sudo apt-get install libgpiod-dev gpiod

# compile test file
$ wget -c https://chipsee-tmp.s3.amazonaws.com/SourcesArchives/HARDWARETEST/gpiotest.c
$ gcc gpiotest.c -o gpiotest -lgpiod
$ ./gpiotest

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