[DKScott]

#2378

Hello Stone

I am currently developing the STVI070WT-01 screen. I send data to the screen according to the instructions of the data manual, but the screen has not made corresponding changes. In addition, with the routine WS2812B_RGB lamp, Click on the 7-inch display screen to receive a string of incorrect code values. I would like to ask.

Thank you！

[DKScott]

#2382

MCU uses STM32F103ZET6, the wiring mode is the same as the following figure

[Fiona Liu]

#2383

Hello dkscott

Please pay attention to the difference between RS232 and TTL！

 

[DKScott]

#2386

Bancroft

Thank you for your reply

I did not use MAX232, but directly connected to the SCM according to the wiring diagram above, and I also directly used another CH430 module to capture the data on the screen

Because that small board has no schematic diagram, but it can supply power, so I only use it for power supply.

Thanks！

[Fiona Liu]

#2388

I think the logic level is wrong

The 7 inch display screen of model STVI070WT-01 is RS232 port

[DKScott]

#2393

Since there is no schematic on the board, the routine is also directly connected.

Should be TTL interface, otherwise how directly connected to the SCM direct control

The MAX232 is the RS232, sent to the computer, but the CH430 is the same

[Fiona Liu]

#2394

Is the CH340 set to 5V?

If I set it to 5V

You can change it to 3.3V

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