coolpi 4b python3 gpio operation compatable with raspberry pi

[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$

[AugustRobot_Zou]

请问跟RPi.GPIO的函数完全兼容吗?
GPIO.setwarnings(False) 之类的函数都有吗
@大法师

[大法师]

@AugustRobot_Zou
还未完整测试所有接口。

[AugustRobot_Zou]

@大法师
请问有支持python3.6的 .whl安装包吗？
我的docker环境是unbuntu18.04+py2.7+py3.6.9的，CPi.GPIO-1.0.0-cp38-cp38-linux_aarch64.whl安装不了。
或者有没有其他方式，驱动gpio

[大法师]

@AugustRobot_Zou
所有的底层封装操作都是基于访问/sys/class/gpio/

https://www.cool-pi.com/topic/72/coolpi-4b硬件扩展四-gpio

[AugustRobot_Zou]

@大法师
请问能麻烦编译一个python3.6.9的安装包吗？
使用CPi.GPIO-1.0.0-cp38-cp38-linux_aarch64.whl，必须装上python3.8。
我的docker环境是ubuntu18.04+python3.6.9+ROS。

装了python3.8后，同时存在python3.8和python3.6，导致原本的代码程序很多python版本适配问题，这几天为这个问题搞得头大，很难兼顾 CPi.GPIO库和原来的程序，模块脚本的#!/usr/bin/python3 只能配置2选1（3.8 or 3.6 )。

[大法师]

@AugustRobot_Zou okay!

[jack_admin]

@AugustRobot_Zou CPi.GPIO-1.0.0-cp36-cp36m-linux_aarch64.whl

[AugustRobot_Zou]

@jack_admin @大法师
Really appreciate your help!
Now our system is basically compatible with coolp4B，which used to running on raspberry-pi4B.

[xingzhan2012]

有python3.9版本的吗

[jack_admin]

@xingzhan2012 有。在帖子最顶楼

[xingzhan2012]

@jack_admin 谢谢

[Macs]

Does the coolpi have a DPI mode for the gpio like the RPI4?

[jack_admin]

@Macs said in coolpi 4b python3 gpio operation compatable with raspberry pi:

Does the coolpi have a DPI mode for the gpio like the RPI4?

WiringPi ?

[Macs]

@jack_admin I mean can output video signal on the gpio using with custom timings, like you can on the RPI4?

[Orion]

请问支持C++语言吗

[jack_admin]

@Orion C++可以代码文件操作gpio，不需要调用python库

[Orion]

@jack_admin 请问C++需要包含哪个库呢，是writtingPi吗

[jack_admin]

@Orion 直接裸操作/sys/class/gpio，不做二次包装