On Tue, Sep 11, 2018 at 12:49 PM Mark A. Yoder <[email protected]> wrote:
>
> Robert Nelson has answered my question.  There are a number of pins already 
> used on the BeagleBone Green Wireless that can't otherwise be used.
>
> I've made a list of them[1].
>
> --Mark
>
> [1] https://elinux.org/EBC_Exercise_10b_Green_Wireless_Pins_Used

We should add a few details,

Pins:
P8_11, P8_16, and P8_15 can be recovered, by sticking the wl1835 wifi
module in 1-bit mode vs 4-bit mode..

sudo rm /lib/firmware/BB-BBGW-WL1835-00A0.dtbo
sudo cp /lib/firmware/BB-BBGW-WL1835-1BIT-00A0.dtbo
/lib/firmware/BB-BBGW-WL1835-00A0.dtbo

P8_12 = WL1835: mmc2_dat0
P8_18 = WL1835: mmc2_clk

P8_14 = WL1835: Wireless enabled
P8_17 = WL1835: Wireless IRQ

P9_12 = WL1835: Bluetooth enabled

Pins:
P8_26, P9_30 are "gpio hogged" at startup, not user changeable.

Pins:
P9_28, P9_29, and P9_31 are used by audio, which isn't actually used,
but tied up..

@mark, random thought, do you want to try booting with
P9_28/P9_29/P9_31 removed from bbgw..

for example..

https://github.com/beagleboard/bb.org-overlays/commit/502c3d228dd6a6902cc6d7b32014075b7c6b8eb6

Regards,

--
Robert Nelson
https://rcn-ee.com/

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