PIC Assembler Code for ST7565 GLCD

[bobledoux]

I’ve attached PIC assembler code to initialize and display using the 64 by 128 pixel AdaFruit 250 GLCD that costs $17.95

The software is for an 8-bit PIC. My example uses a 16F88. The SSP module sends data and instructions to the GLCD in the background. No other PIC modules are required.

The GLCD requires low voltage so the PIC operates and is programmed using low voltage protocol.

Additional comments are at the bottom of the assembler file. The file opens in a “pretty” format with Microsoft Notepad

Feedback is invited

 

[Mike - K8LH]

Hi Bob,

A link to the AdaFruit 250 GLCD would be nice...

Regards...

 

[House0Fwax]

I believe this is the GLCD,
https://www.adafruit.com/products/250

 

[richard.c]

You might find this post of interest. https://www.electro-tech-online.com/threads/glcds-with-pic-18f-assembler.40676/

The only modification to it is to use a 74HC4050 voltage translator instead of the original 74AC08

The EADOG 128x64 which also uses the ST7565 controller comes with handy 0.1" pitch connectors and is available in the US.
https://www.lcd-module.com/products/dog.html

 

[bobledoux]

Here is a good site about the EADOG display:

**broken link removed**

I wanted to use an 8-bit PIC with assembler. Most applications use C. My application is a 64 x 32 cell of Conway's Game of Life using a 16F88, also in assembler.

 

[edeca]

Thanks bobledoux, if you find anything that you think needs updating in the article then let me know.