coolpi 4b python3 gpio operation compatable with raspberry pi

大法师

download and install with root user.

sudo pip3 install CPi.GPIO-1.0.0-cp38-cp38-linux_aarch64.whl

for ubuntu 20.04
CPi.GPIO-1.0.0-cp38-cp38-linux_aarch64.whl

for ubuntu 22.04
CPi.GPIO-1.0.0-cp310-cp310-linux_aarch64.whl

other
CPi.GPIO-1.0.0-cp39-cp39-linux_aarch64.whl

default gpio cfg with system image:
33e8f15f-4873-40b9-b72d-565a7939aa34-110d40fc1c675dc16529c2212427a4e.png
gpio_coolpi

test.py

running test:

sudo python3 test.py

#!/usr/bin/env python3

import CPi.GPIO as GPIO
import time

PIN = 40

GPIO.setmode(GPIO.BOARD)
GPIO.setup(PIN, GPIO.OUT)

while True:
   GPIO.output(PIN, 0) 
   time.sleep(1)
   GPIO.output(PIN, 1) 
   time.sleep(1)

其中GPIO.setmode(GPIO.BOARD)表示使用coolpi 4b板子自然编号Pin number。如果要使用Rockchip gpio编号，需要引用GPIO.setmode(GPIO.RK)。

if you want to remove this module, exec command:

sudo pip3 uninstall CPi.GPIO

花月

也适用于debain等其他系统嘛

george

@花月注意python版本，其它都是一样的。ubuntu22.04 默认python3.10，要注意切换一下。

花月

@george SPI 怎么开，在debain下安装完输入gpio_coolpi显示命令找不到
是否有比较全的示例介绍SPI

jack_admin

@花月
系统中若无该命令，请将附件文件拷贝到/usr/sbin/，再执行chmod a+x /usr/sbin/gpio_coolpi

gpio_coolpi

SPI与I2C操作使用标准python或标准C调用API

花月

@jack_admin 这个附件名称是什么，下载是数字的名称，有后缀嘛？

jack_admin

@花月可以拷贝重命名/usr/sbin/gpio_coolpi

dreamer

@george Is there any way to use GPIOs without sudo priviledge, such as in a ros package?

大法师

@dreamer
hi, please add extra operation for coolpi user.

Add rules for normal user:

sudo echo "SUBSYSTEM==\"gpio*\", ACTION==\"add\", PROGRAM=\"/bin/bash -c 'chown root:coolpi /sys/class/gpio/export /sys/class/gpio/unexport;chmod 220 /sys/class/gpio/export /sys/class/gpio/unexport'\"" > /lib/udev/rules.d/99-gpio.rules
sudo echo "SUBSYSTEM==\"gpio*\", ACTION==\"add\", PROGRAM=\"/bin/bash -c 'chown root:coolpi /sys%p/direction /sys%p/value /sys%p/edge /sys%p/active_low; chmod 0660 /sys%p/direction /sys%p/value /sys%p/edge /sys%p/active_low'\"" >> /lib/udev/rules.d/99-gpio.rules
sudo reboot

Check rules:

coolpi@coolpi:~/Desktop$ cat /lib/udev/rules.d/99-gpio.rules 
SUBSYSTEM=="gpio*", ACTION=="add", PROGRAM="/bin/bash -c 'chown root:coolpi /sys/class/gpio/export /sys/class/gpio/unexport;chmod 220 /sys/class/gpio/export /sys/class/gpio/unexport'"
SUBSYSTEM=="gpio*", ACTION=="add", PROGRAM="/bin/bash -c 'chown root:coolpi /sys%p/direction /sys%p/value /sys%p/edge /sys%p/active_low; chmod 0660 /sys%p/direction /sys%p/value /sys%p/edge /sys%p/active_low'"

Test case:

coolpi@coolpi:~/Desktop$ echo 115 > /sys/class/gpio/export 
coolpi@coolpi:~/Desktop$ ls /sys/class/gpio/gpio115
active_low  device  direction  edge  power  subsystem  uevent  value
coolpi@coolpi:~/Desktop$ echo out > /sys/class/gpio/gpio115/direction 
coolpi@coolpi:~/Desktop$ echo 1 > /sys/class/gpio/gpio115/value 
coolpi@coolpi:~/Desktop$ echo 0 > /sys/class/gpio/gpio115/value 
coolpi@coolpi:~/Desktop$

Screenshot from 2023-01-16 13-14-27.png