Shop OBEX P1 Docs P2 Docs Learn Events
HD44780 LCD display problems — Parallax Forums

HD44780 LCD display problems

Aaron193Aaron193 Posts: 27
edited 2007-05-05 18:26 in BASIC Stamp
Okay, I have an HD44780 LCD display that I am using via parallel interface. I know it works because I managed to get a message to show up. Now my problem is has to do with reading from the onboard DDRAM. I've looked at multiple datasheets, and I haven't gotten a step-by-step method for reading from the DDRAM. I guess part of the problem is that the Basic Stamp is too slow to catch anything from the display. Am I right, or should it work? If I'm wrong, can someone give me some sample code for reading some byte from some DDRAM address? Thanks.

Aaron

Comments

  • Chris SavageChris Savage Parallax Engineering Posts: 14,406
    edited 2007-05-04 21:18
    Hello,

    The BASIC Stamp can certainly read data from the DDRAM. I believe we have an example of this in the Stamp Works Manual. Experiment #13. You can download a free PDF of the manual from our website as well as the example code. I hope this helps. Take care.

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Chris Savage
    Parallax Tech Support
  • Capt. QuirkCapt. Quirk Posts: 872
    edited 2007-05-05 18:26
    Try this data sheet· Pages·5·to 8. this sheet is as straight foward and easy as it gets for a datasheet. Also Microchip (arghh!!)·App Note AN587

    We·may be able to help you more, if you tell us exactly what your trying to do and display your code.

    Bill


    Post Edited (Capt. Quirk) : 5/5/2007 6:34:38 PM GMT
Sign In or Register to comment.