January 27Jan 27 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 cat /sys/kernel/debug/gpio gpiochip0: GPIOs 0-287, parent: platform/300b000.pinctrl, 300b000.pinctrl: gpio-71 ( |spi0 CS1 ) out hi ACTIVE LOW gpio-74 ( |i2c-gpio ) out hi gpio-75 ( |spi0 CS0 ) out hi ACTIVE LOW gpio-76 ( |i2c-gpio ) out hi gpio-77 ( |spi0 CS2 ) out lo gpio-78 ( |dc ) out hi gpio-166 ( |:wifi_power ) out hi gpio-207 ( |:wifi_wake ) out hi gpio-210 ( |reset ) out hi ACTIVE LOW gpio-229 ( |led-0 ) out lo ACTIVE LOW Edited January 28Jan 28 by ComProf
March 10Mar 10 Greetings, i own a CB1, however i cannot get it to work well either. Perhaps we can help each other.
March 13Mar 13 Author I`ll already done it. Switched to original Btt image. Understand what that board is didn`t love any sd-card. I`ll stopts on AP32GMCSH10UB-RA card. If card didn't made friends with the board it not boot,reboot`s,power off, halt`s.... IO pins i didnt use.... I`ll swithed to ch340 as uart, because it`s understand 3.3 and 5v levels. The board only 3.3 CAN i use on RP2040+can chip, what cost only 5$(in total), not 15$ for btt can. in a end of can bus i`ll use EBB42 so it`s have all i need.... It`s about I2C bus. Thats my story If u need help, free to ask. I`ll will help if i coud Edited March 13Mar 13 by ComProf
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