bigtreetech / bigtreetech/CB2

The 40-pin GPIO header is missing important markings in the manual.

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Description

As there is no uart adapter on the type-c connector, a different way to connect and debug the board is needed in case it's not possible to connect to the network or when developing OS images. The pin roles match up somewhat with BTT Pi, notably UART pins are the same: `GPIO0_D0` is RX and `GPIO0_D1` is TX, which are labeled UART2 pins in the rk3566 datasheet I found. The UART connection used 1.5M baud speed.

Please add GPIO pin roles into the manual, just like for BTT Pi and CB1

Contributor guide

No contributing guide indexed for this repository

Research direction

Start with the CB2 manual and compare its 40-pin GPIO header section with the BTT Pi and CB1 manuals. Confirm the UART pin roles described in the issue, including GPIO0_D0 as RX and GPIO0_D1 as TX, then update the manual so the GPIO pin roles are marked and verify the header documentation is complete.

Written by the indexing model from the issue text.

Assessment

Domain
documentation, embedded-iot
Issue type
Documentation
Difficulty
2/5
Estimated time
1-3 hours
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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