A little 16F628A Demo :D

Discussion in 'Embedded Systems and Microcontrollers' started by Art, May 6, 2016.

  1. Art

    Thread Starter AAC Fanatic!

    Sep 10, 2007
    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.
    nsaspook and JohnInTX like this.
  2. JohnInTX


    Jun 26, 2012
    Cool! Consider putting it in Completed Projects?
  3. Art

    Thread Starter AAC Fanatic!

    Sep 10, 2007
    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.