How to add more types of screens ?

[markbirss]

How do i add for example the ST7920 oled screen ?

[thijstriemstra]

Very generic question, can you be more specific?

[markbirss]

sure, currently the ST7920 oled screen is unsupported, what changes are required to add support for this screen

[rm-hull]

ST7920 is an LCD screen rather than OLED.

You would need to find the datasheet for the device, read it and understand how to send data to the display (whether that is via I2C, SPI or parallel bIt-banging). Then use one of the other implementations as a guide, implement a class that extends device (see https://luma-oled.readthedocs.io/en/latest/api-documentation.html) where its display() method takes a pillow image and converts the pixels to the correct commands and data for device

[rm-hull]

Moving to luma.lcd ....

[markbirss]

Ok, understood, thank you for your feedback

I will close the issue but leave these notes below

I have found much of that information but, I dont have the depth of understanding at the moment to put it into a implementation.

Will leave it here if anyone else interested.

Datasheet
https://www.lcd-module.de/eng/pdf/zubehoer/st7920_chinese.pdf

Enable SPI mode is simply done by connecting PSB to GND
Enable Parallel mode by connecting PSB to 5V

How th screen works
https://www.instructables.com/id/The-Secrets-of-an-Inexpensive-Ubiquitous-Chinese-L/

U8G2 ports
https://github.com/ribasco/u8g2-rpi-demo

https://github.com/olikraus/u8g2

[rm-hull]

Related issue: #46
Related PR: #98

[rm-hull]

I think the PR for this stalled because driving it via parallel bit-banging was going to be awkward.
If this is true:

Enable SPI mode is simply done by connecting PSB to GND

then it might be straightforward to getting it working