OLED Expnasion - converting pixel coordinates to bit offset coordinates
I'm trying to build a very simple Python script to draw images onto the OLED expansion screen.
So far what I'm doing is storing the image I want as an array of bits. I'm stumped on the coordinate system however. Given X and Y coordinates, how would I know which bit to change in my bit array?
Patryk Wychowaniec last edited by Patryk Wychowaniec
I'm plainly guessing but basing on my experience with displays, I'd say it would be something like this:
arrayIndex = x + (y/8)*screenWidth
bitIndex = y%8
Look at the display's documentation, it has to precise this.
This is the screen I'm referring to. It's a little more complicated than that I'm afraid. It has some weird addressing.
The chip used is the SSD1306. If you're opening I2C for direct write from your script I recommend you to read the chip datasheet: https://www.olimex.com/Products/Modules/LCD/MOD-OLED-128x64/resources/SSD1306.pdf
The datasheet has more information and detail on is the mapping organized.