BTT Pi + BTT TFT35+2 UART+ I2C

[ComProf]

Hello. BTT says what BTT Pi and CB1 is same, but realy not.

Dunno why i brought what board. But now I owner of this "piece of ****"

So. New board, clean install 

 v25.11.2 for BigTreeTech CB1 running Armbian Linux 6.12.58-current-sunxi64
 Packages:     Debian stable (trixie)

 

armbianEnv:

overlays=gpu tft35_spi
extraargs=fbcon=rotate:2

fbcon=rotate:2 for screen rotation, because armbian not from btt and didn`t have feature like param_tft35_spi_rotate

 

Next, help me to determine how to enable UARTs and I2C

From BIGTREETECH_Pi_V1.2.1 Hardware Pdf

 

UART0: CPUX-UTX CPUX-RX

UART2 (May work as i2c0; uart2-pi-pins; i2c0-pins ) Pi5 Pi6

UART3 (May work as i2c2; uart3-pi-pins; i2c2-pi-pins ) Pi9 Pi10

I2C (i2c4-ph-pins; spi1-pins): PH6 PH7 (must work, i`ll think i2c4-ph overlay present)

All pins present in sun50i-h616-bigtreetech-cb1-sd, but didnt have overlays for it...

I wish to stay uart0 for u-boot console

first uart setup for klipper connections to mcu.

any help?

 

If I understand right PH6 is 7*32+6=230

gpioinfo output

line 230:       unnamed                 input consumer=kernel
line 231:       unnamed                 input consumer=kernel

 

Edited 1 hour ago by ComProf