How can I control PS MIO GPIOs under PYNQ?

Question

Hello Everyone,

I see lots of great examples out there of how to control all sorts of hardware under PYNQ using Jupyter Notebooks.

How can I control something seemingly very simple like PS MIO GPIOs from a Jupyter Notebook?

Thanks,

-Kevin

kevinkeryk · Accepted Answer

Well after searching around for a while and getting some information from Mario B and Fred K, I compiled a Jupyter Notebook to help illustrate how this all works: https://github.com/zedhed/ultra96 Long story short, you have to export a particular GPIO so that a control for it appears within sysfs under the /sys/ folder. Here are the shortcut commands to control the MIO45 that I wanted to use: # Find out what you have for GPIO controllers (I have seen numbers change quite a bit from one Linux kernel release to another)
ls /sys/class/gpio/

# Export controls for the specific GPIO that you want to use, after you translate the MIO45 number to logical Linux GPIO number (in this case it is 338 + 45 = 383)
echo 383 > /sys/class/gpio/export

# Set the MIO controller to operate in the output mode
echo out > /sys/class/gpio/gpio383/direction

# Next try setting the output state to logic high
echo 1 > /sys/class/gpio/gpio383/value

# Finally, try setting the output state back to logic low
echo 0 > /sys/class/gpio/gpio383/value Please read through the ultra96/ultra96-gpio/ultra96_control_ps_mio_gpios.ipynb Notebook for a much more thorough writeup on this topic. Best Regards, -Kevin

How can I control PS MIO GPIOs under PYNQ?

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