bigtreetech / bigtreetech/CB1

gpio pins NOT working with CB1 eMMc V1.1

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Description

CB1 eMMc on Manta M5P
I have setup the CB1 eMMc as a second MCU configured gpio79 for PI-FAN which is the socket on the M5P.

[mcu cb1]
serial: /tmp/klipper_host_mcu

[heater_fan SoC_fan]
pin: cb1:gpio79

Settings have been verified by several people and all have said correct but I get this message MCU 'cb1' error during config: Unable to open out GPIO chip line

Please fix or report back if I have a hardware issue

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Research direction

Start with the reported [mcu cb1] and [heater_fan SoC_fan] configuration using cb1:gpio79, then investigate the CB1 eMMC and Manta M5P GPIO mapping behind the “Unable to open out GPIO chip line” error. Done means determining whether gpio79 is supported and identifying a configuration or hardware issue, with the result reported back in the issue.

Written by the indexing model from the issue text.

Assessment

Domain
embedded-iot
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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