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

bigtreetech / CB2

The official repo for the BTT Pi2 and CB2

https://bttwiki.com/Pi2.html

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The 40-pin GPIO header is missing important markings in the manual. #31

Open JohnTheCoolingFan opened 1 month ago

JohnTheCoolingFan commented 1 month ago

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

BTTJUSTIN commented 4 weeks ago

Hi, Thanks for your information. which one you refer to ? please check the following picture if meet your need. 1.

JohnTheCoolingFan commented 4 weeks ago

The Picture №1 is from the Pi 2 and CB2 manual, and it only has gpio numbers, but not roles such as uart rx/tx and others.

BTTJUSTIN commented 3 weeks ago

Hi,The pins of CB2 and CB1 are the same, the RX, TX pins are in the same position, but with different serial numbers. Please refer to the pin of CB1

JohnTheCoolingFan commented 3 weeks ago

It would be better if this was explicitly marked in the manual for Pi 2 and CB2, instead of being implied through CB1 manual.