8MM EVK board exposed pins(J1003)

[mikemalgin]

Hello, 

I'm working with iMX8MM EVK under android 9. On the EVK board J1003 there are several exposed pins -   "EXP_IO12 5", "EXP_IO11 5", etc. Is it correct to say that I can only access these through the I2C MUX interface? Is there a way to export them and have access to these as  normal GPIOs?

In addition, I cannot locate any "normal" GPIOs that are being exposed through the J1003, which is very strange. Any clarification will be highly appreciated. 

Thanks! 

[mikemalgin]

Thanks Igor, is there some example of how to work with that I2C MUX to access those GPIOs?

[igorpadykov]

I am not aware of such examples, sorry.

Best regards
igor

[igorpadykov]

Hi mike

>Is it correct to say that I can only access these through the I2C MUX interface?

yes

>Is there a way to export them and have access to these as  normal GPIOs?

no

>I cannot locate any "normal" GPIOs that are being exposed through the J1003

one can look at Table 8-1. Muxing Options i.MX8M Mini Reference Manual, for example

UART3_TXD (J1003 pin8) can be configured as GPIO5_IO27.

Best regards
igor
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[pavel_]

What about EXP_IO8,9,10,11,12,13,14 pins?

Haw are they configured? Which GPIO bank/pin?

[mikemalgin]

As far as I could tell, they are all connected to that i2c MUX