Hi Guys
A project came along perfect to try a simple oscilloscope display for HD44780 LCD.
The bitmap graphics routines for GCRAM I did some years ago, but this is the first I tried this.

The CGRAM characters are arranged as a single bitmap frame buffer to make a pixel display.
The scale is the first 0.25 seconds at the beginning of every real time second.
Other than in Pulse mode, there’s nothing to tie a rising edge to the beginning of a second,
so it’s correct that the waveform should walk.
Cheers, Art.

 

Cool! Consider putting it in Completed Projects?

 

Hi John, I’d rather someone just pm me if they want the code.
It’s mostly Picbasic Pro with some asm for the faster stuff such as array rotations.
The schematic I started with is also not accurate anymore particularly since
I wasn’t able to use the UART tx port as an IO pin although I only wanted rx.