brufra
Posts: 2
Joined: Mon Mar 11, 2019 2:53 pm

Compute Module 3+ SDIO1 pins 22-27 and 34-39

Thu Apr 11, 2019 2:50 pm

Hi,

I'm trying to handle the SDIO1 interface.

First of all, I used SDIO1 peripheral on pins 22-27 at 3.3 V by adding

Code: Select all

dtoverlay=sdio,pool_once=off,bus_width=4
to config.txt file and it works fine.
Then, I tryied to use SDIO1 on pins 34-39 at 3.3V by:
  • creating a custon sdio34.dtbo file
  • copying it to the overlays folder
  • adding

    Code: Select all

    dtoverlay=sdio34,pool_once=off,bus_width=4
This second solution does not works, the error returned is
mmc1: error -110 whilst initialising SDIO card
Any advice?

Does SDIO supports 1.8V?

Thanks.

brufra

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