Rpi GPIO tester

Inspired by what has been done here (Parallel Port Tester - forum.linuxcnc.org/18-computer/4743-parallel-port-tester#4743) I have prepared a similar test in PyVCP for Raspberry GPIO, to be used with hal_pi_gpio module.

Since, unlike the parallel port, it is possible to define the input and output pins, I chose to define the available odd pins (on the left) as input and use the even available ones (on the right), excluding pin 3 for safety and 5 (GPIO 2 SDA and GPIO 3 SCL)

In this case, via the rpi-gpio utility available here:

 - armhf github.com/jethornton/rpi_gpio
 - arm64 forum.linuxcnc.org/18-computer/43353-rpi...tion?start=10#226664
 
 you can select the function of the pin

 

 

As you can see, the command to insert in the rpi_test.hal file is the following
loadrt hal_pi_gpio dir=15561824 exclude=3.

Before using halrun it is necessary to initialize the pins with the raspi-gpio command which, in this case, will be
 
To run this place both files (rpi_test.hal and rpi_test.xml) in the same directory and open a terminal window and use the command