How to toggle GPIO in user space in iMx8 M mini

[anushan]

Hi Everyone,

I am trying to toggle gpio's from user space, to find the gpio number a I am using the formula ==>(bank number * 64) + Pin number, I am exporting the gpio and trying to toggle it but when I probe the gpio its voltage remains the same.

 Am I using the correct formula for iMx8 M mini custom board ?

Also, the gpio numbers in /sys/class/gpio/ are named gpiochip32, gpiochip64 etc and not gpio32 or gpio64 . Why is it like that? With what name should I export the gpio?

Regards,

Anusha

[igorpadykov · Accepted solution]

Hi Anusha

one can look at variscite resources:

DART-MX8M GPIO - Variscite Wiki 

Best regards
igor
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[anushan]

Hi Igor,

Thanks for the link.

Regards,

Anusha