Freeplay CM4
#38
I think you have this one, right?
https://wiki.geekworm.com/CM4_to_CM3_Adapter

They are almost correct in saying that it only has 28 GPIOs.  Notice on the screenshot of the CM4 datasheet (I posted in my previous message) that it shows GPIO0-27 on one page and then GPIO44-45 on the next page.  I think that 44 and 45 are the only ones over 27 that the CM4 has.

The board we used (which has different problems) looks like this. 
https://github.com/gumstix/PKG9000000014...001454.pdf
(also see https://www.gumstix.com/cm4-uprev.html)

Notice that they route "I2C_SCL" and "I2C_SDA" from the CM4 pins 80 and 82 to CM3 pins 82 and 84.  These are the GPIO 44 and 45 which the Freeplay CM3 uses.

I think it's an oversight/mistake that Geekworm did not route these.

If you're going to try to solder to something small, you could maybe first try to solder to pins 3 and 5 on the Freeplay CM3 and run them to the "44" and "45" solder holes that the add-on board uses.  That could be tricky, but it'd be the best case, in my opinion.


   
My pen is pointing at pin 1 here, so 3 would be next to that, and 5 would be the 3rd pin in.
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Messages In This Thread
Freeplay CM4 - by smoscar01 - 07-12-2022, 02:38 PM
RE: Freeplay CM4 - by Flavor - 07-13-2022, 12:42 AM
RE: Freeplay CM4 - by smoscar01 - 07-13-2022, 11:46 PM
RE: Freeplay CM4 - by Flavor - 07-14-2022, 12:50 AM
RE: Freeplay CM4 - by smoscar01 - 07-14-2022, 04:35 PM
RE: Freeplay CM4 - by Flavor - 07-14-2022, 11:47 PM
RE: Freeplay CM4 - by smoscar01 - 07-15-2022, 12:39 AM
RE: Freeplay CM4 - by Flavor - 07-15-2022, 01:16 AM
RE: Freeplay CM4 - by smoscar01 - 07-15-2022, 11:33 AM
RE: Freeplay CM4 - by smoscar01 - 07-15-2022, 02:02 PM
RE: Freeplay CM4 - by Flavor - 07-16-2022, 12:31 AM
RE: Freeplay CM4 - by Flavor - 07-16-2022, 12:37 AM
RE: Freeplay CM4 - by smoscar01 - 07-16-2022, 01:53 AM
RE: Freeplay CM4 - by Flavor - 07-16-2022, 02:00 AM
RE: Freeplay CM4 - by Flavor - 07-16-2022, 02:03 AM
RE: Freeplay CM4 - by Flavor - 07-16-2022, 02:11 AM
RE: Freeplay CM4 - by Flavor - 07-16-2022, 02:24 AM
RE: Freeplay CM4 - by Flavor - 07-16-2022, 02:26 AM
RE: Freeplay CM4 - by smoscar01 - 07-16-2022, 09:06 AM
RE: Freeplay CM4 - by Flavor - 07-16-2022, 09:18 AM
RE: Freeplay CM4 - by smoscar01 - 07-16-2022, 10:24 AM
RE: Freeplay CM4 - by smoscar01 - 07-16-2022, 11:14 AM
RE: Freeplay CM4 - by smoscar01 - 07-17-2022, 06:38 AM
RE: Freeplay CM4 - by Flavor - 07-17-2022, 06:42 AM
RE: Freeplay CM4 - by smoscar01 - 07-17-2022, 09:23 AM
RE: Freeplay CM4 - by Flavor - 07-17-2022, 09:41 AM
RE: Freeplay CM4 - by smoscar01 - 07-17-2022, 10:50 AM
RE: Freeplay CM4 - by smoscar01 - 07-17-2022, 12:34 PM
RE: Freeplay CM4 - by Flavor - 07-17-2022, 12:37 PM
RE: Freeplay CM4 - by Flavor - 07-17-2022, 12:38 PM
RE: Freeplay CM4 - by Flavor - 07-17-2022, 12:45 PM
RE: Freeplay CM4 - by smoscar01 - 07-17-2022, 01:01 PM
RE: Freeplay CM4 - by Flavor - 07-17-2022, 01:30 PM
RE: Freeplay CM4 - by smoscar01 - 07-17-2022, 02:40 PM
RE: Freeplay CM4 - by smoscar01 - 07-18-2022, 06:24 AM
RE: Freeplay CM4 - by Flavor - 07-19-2022, 04:45 AM
RE: Freeplay CM4 - by smoscar01 - 07-19-2022, 06:07 AM
RE: Freeplay CM4 - by Flavor - 07-19-2022, 07:02 AM
RE: Freeplay CM4 - by Flavor - 07-19-2022, 07:10 AM
RE: Freeplay CM4 - by Flavor - 07-19-2022, 07:13 AM
RE: Freeplay CM4 - by smoscar01 - 07-19-2022, 01:10 PM
RE: Freeplay CM4 - by Flavor - 07-19-2022, 01:38 PM
RE: Freeplay CM4 - by smoscar01 - 07-19-2022, 02:26 PM
RE: Freeplay CM4 - by smoscar01 - 07-21-2022, 01:39 PM
RE: Freeplay CM4 - by Flavor - 07-21-2022, 01:48 PM
RE: Freeplay CM4 - by Flavor - 07-21-2022, 01:57 PM
RE: Freeplay CM4 - by smoscar01 - 07-21-2022, 03:44 PM
RE: Freeplay CM4 - by Flavor - 07-22-2022, 03:55 AM
RE: Freeplay CM4 - by smoscar01 - 07-22-2022, 12:55 PM
RE: Freeplay CM4 - by Flavor - 07-22-2022, 02:25 PM
RE: Freeplay CM4 - by smoscar01 - 07-22-2022, 03:05 PM
RE: Freeplay CM4 - by Flavor - 07-23-2022, 12:45 AM
RE: Freeplay CM4 - by smoscar01 - 07-24-2022, 08:52 AM
RE: Freeplay CM4 - by Flavor - 07-24-2022, 09:09 AM
RE: Freeplay CM4 - by smoscar01 - 07-24-2022, 10:53 AM
RE: Freeplay CM4 - by smoscar01 - 07-27-2022, 01:41 AM
RE: Freeplay CM4 - by Flavor - 07-27-2022, 02:14 AM
RE: Freeplay CM4 - by smoscar01 - 07-27-2022, 03:16 PM
RE: Freeplay CM4 - by Flavor - 07-28-2022, 02:13 AM
RE: Freeplay CM4 - by smoscar01 - 07-29-2022, 10:16 PM
RE: Freeplay CM4 - by smoscar01 - 08-01-2022, 06:48 AM

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