GC9503V support

[moinmoin-sh]

Is there a way to use the GC9503V with your lib?
It's used in this panel WT32S3-86V driven by an ESP32S3.
Thanks.

[Adrianotiger]

The GC9XXX is already present in the repository:
https://github.com/lovyan03/LovyanGFX/blob/master/src/lgfx/v1/panel/Panel_GC9A01.hpp

Maybe it works with it. If you can find the datasheet of the GC9503V, you can just add the init commands in this file (I can't find any datasheet with the communication protocol of this chip).

[lovyan03]

Please refer to this file for the setting method.
Since Panel_ST7701 is used, you need to change it to Panel_GC9503 .
https://github.com/lovyan03/LovyanGFX/blob/master/src/lgfx_user/LGFX_ESP32S3_RGB_MakerfabsParallelTFTwithTouch40.h

https://github.com/lovyan03/LovyanGFX/blob/master/src/lgfx/v1/platforms/esp32s3/Panel_RGB.hpp#L104
Implementation is here.

Please note that it may not work due to insufficient verification.

[moinmoin-sh]

That sounds like a good starting point. Thanks for your feedback.
I've a panel on route and will share the progress (if any ..)

[strange-v]

Oops, done. Thanks for noticing it.

[moinmoin-sh]

I don't have the 86S version panel on hand, but started to prepare the integration for someone else. Testing is ongoing.

[strange-v]

Here is the screen code from the manufacturer: https://github.com/wireless-tag-com/ZX3D95CE01S-TR-4848/blob/master/main/screen.c
It looks quite similar to what I have.

It would be interesting to understand how to verify the correctness of:

• hsync_polarity
• vsync_polarity
• pclk_idle_high
• de_idle_high

@moinmoin-sh, I can test whether it runs when the integration is ready.

[moinmoin-sh]

I could provide a binary if you are interested?

[strange-v]

Why not, let's try.

[strange-v]

To test whether the manufacturer provided the correct pinout and code, I built their ESP-IDF sample project, and it does work. At least something :)

[strange-v]

Arduino_GFX works with the same parameters. I may use it, but LovyanGFX always had a better performance.

[moinmoin-sh]

This is the binary I anounced.
removed because not working
I recommend to erase the flash and use the esptool to flash the binary at address 0.
If everything goes well you should see the blue OXRS splash screen which confirms the screen is working.

[strange-v]

It works with the latest changes!

[lovyan03]

Did you solve the problem?
If you really want to do a special reset, you can do the following

#include <LovyanGFX.hpp>
#include <lgfx/v1/platforms/esp32s3/Bus_RGB.hpp>
#include <lgfx/v1/platforms/esp32s3/Panel_RGB.hpp>

class LGFX : public lgfx::LGFX_Device
{
  lgfx::Panel_GC9503 _panel_instance;
  lgfx::Bus_RGB       _bus_instance;
public:
  const gpio_num_t PIN_RST = GPIO_NUM_41;

  bool init_impl(bool use_reset, bool use_clear) override
  {
    lgfx::pinMode(PIN_RST, lgfx::pin_mode_t::output);
    lgfx::gpio_hi(PIN_RST);
    lgfx::delay(64);
    lgfx::gpio_lo(PIN_RST);
    lgfx::delay(8);
    lgfx::gpio_hi(PIN_RST);
    lgfx::delay(64);
    return LGFX_Device::init_impl(use_reset, use_clear);
  }

[strange-v]

@lovyan03 the latest changes in dev resolved the issue with WT32S3-86S. But thanks for the example of a custom reset.

[alpha815]

Hi guys, Sorry i am bit late to part. I recently got this display and it is working with Arduino_GFX library. But I would love to get a sample code for LovyanGFX. If you have it sorted out, can you provide a "hello world" sample for this display?

[strange-v]

@alpha815, I don't have a standalone example, but you can use this one (it's for a different screen) with this LGFX.hpp file.