Pinebook SDIO gpio control using SD card slot blog post

This is my first experiment with bringing some of the A64 gpio mux lines to the outside via the SD card slot;  SDIO.  These are data lines D0-D3, CMD, CLK, VDD, & VSS.  The lines are gpio160 - gpio166;  PF0 - PF6.

The pic above is the 48cm ribbon cable that extends the SD micro slot to a full size card adapter;  this ribbon is useful in itself;  but I plan to modify it for pin access on a solderable bread-board.


These two shots are the modified ribbon cable;  this was actually easier than I expected.  The cable will extend under the notebook.


The two shots above show the finished cable running;  I have the green and red LED(s) initially connected to CMD and CLK.  These are pulsing at regular 3/4 second intervals (or so).  The gpio(s) are not useful in this state;  next I need to hack the dts and make sure that the pin function register has '0' s. 

Please see this important link:
marcushh777    Cool

please join us for a chat @   or ssl

( I regret that I am not able to respond to personal messages;  let's meet on irc! )

Messages In This Thread
Pinebook SDIO gpio control using SD card slot blog post - by MarkHaysHarris777 - 07-20-2017, 04:56 PM

Possibly Related Threads...
Thread Author Replies Views Last Post
  pinebook to pro upgrade path? dhosh 13 520 11-14-2019, 11:25 AM
Last Post: bcnaz
  Pinebook 11" Keyboard Corkonian 2 188 11-02-2019, 07:41 AM
Last Post: Corkonian
  Pinebook battery connector and reuse binholz 2 218 10-17-2019, 11:05 AM
Last Post: tophneal
  [SOLVED] Pinebook stopped to charge UltraBloxX 7 453 10-17-2019, 04:09 AM
Last Post: pfeerick
  Pinebook 1080p screen with other SBC? binholz 5 296 08-07-2019, 05:56 AM
Last Post: jezek
  Pinebook internals kodkuce 1 321 07-30-2019, 02:45 PM
Last Post: binholz
  how to install emmc in just arrived pinebook dkebler 11 6,270 06-13-2019, 01:13 AM
Last Post: zk1sps
  Pinebook Pro Video Out Options faroh8Je 2 173 06-12-2019, 05:16 AM
Last Post: Luke
  Pinebook HDMI not working DarkShadow 3 265 05-16-2019, 03:56 PM
Last Post: DarkShadow
  Pinebook Pro Network diagnostics hardware xavi 3 276 05-01-2019, 09:53 PM
Last Post: tllim

Forum Jump:

Users browsing this thread: 1 Guest(s)