problem with st7735 in an orangePI zero 2 (H616)

[bsrobot]

Hi,
I would like to use st7735 in an orangePI zero 2 (H616).
The st7735 module was purchased at the following link:
https://it.aliexpress.com/item/33031122936.html?spm=a2g0o.order_list.order_list_main.32.c5eb36966Y6eGs&gatewayAdapt=glo2ita
Armbian usage.

I connected st7735 in the following way:
OPI --------> st7735
23 --------> SCK
19 --------> SDA
24 --------> CS
13 --------> AD
11 --------> RTD
4 --------> VCC
25 --------> GND

I then ran the following command:
sudo modprobe fbtft_device custom name=fb_st7735r gpios=dc:3,reset:0 speed=16000000 rotate=90

The screen stays white with a red stripe at the bottom.

I can't find any errors in dmesg.
/dev/fb1 is created

how can i use the command

con2fbmap 1 1
which I found by following this guide:
https://www.instructables.com/Orange-Pi-Zero-Connect-TFT-SPI-ST7735/
Thank you

Edited August 11, 2023 by bsrobot

[Werner]

moved

[Peter Gregory]

I recently got my SPI display to work with OPZero2.  This document was very helpful:
https://tienda.tettsa.gt/wp-content/uploads/2022/08/OrangePi_Zero2_H616_User-manual_v3.7.pdf

Your GPIO pin numbers are not correct.

 

I wired to the same GPIO pins suggested in the document above:
1 - VCC     (1) 3.3v
2 - GND     (6) Gnd
3 - CS         (24) Spi1 CS
4 - RESET     (7) GPIO 6 - 73
5 - DC         (11) GPIO 1 - 70
6 - SDI (MOSI)    (19) Spi1 MOSI
7 - SCLK    (23) Spi1 CLK
8 - LED        (13) GPIO 0 - 69
9 - SDO (MISO)    (21) Spi1 MISO
 

The GPIO mapping looks like this:

options fbtft_device custom name=fb_ili9341 gpios=dc:70,reset:73,led:69 speed=16000000 busnum=1 cs=1 bgr=1 txtbuflen-32768 fps=10 rotate=90

 

[bsrobot]

Thanks for the reply.
In these days I will start some tests.
One question, I don't have the led pin.
Could the LED pin be my BLK?
Another curiosity, why use fb_ili9341 and not fb_st7735r?

on PCB i have only SDA i don't have MISO and MOSI pins.
How can I do?

 

Thank you

Edited August 22, 2023 by bsrobot