LCDInfo.com

Hi,

finally posted a update... all I changed is I set E2 to use line 17 and not line 14! Hope this works... Please send me a update if it works or not! What size is your display (2x20, 4x40, 4x80)? Make sure that this is selectd in the setup

http://www16.brinkster.com/rudigrobler/hd44780_driver.zip

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Rudi Grobler

i'll try it out later today - display size is a measly 2x16

after extracting the driver and overwriting the old driver

when i run lcdinfo test version:


and then:



any ideas?

A quick search on google:



I think I compiled the debug in stead of the release version! Will fix now and updated the previous link!!!

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Rudi Grobler

Hi,

My web server seems to be down today so I mailed the update to henri, and asked if he will post it... Mail me and I can send it to you!

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Rudi Grobler

File here: http://www.skippari.net/lcd/alpha/hd44780_driver.zip

Thank you henri,

Please post here if it works or not? I just changed the wiring not to conflic E2 and RW lines

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Rudi Grobler

the same error pops up, choosing a 2x16 character display and 4-bit mode produces strings of a few weird characters that dance around. choosing 8-bit mode produces nothing on the screen, but when I quit the program, the screen says "Good Bye!"(only on 8-bit mode).

any ideas?

That errors is definitly because it is build for debug and not release... I will post the code to henri and ask him to try?

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Rudi Grobler

That errors is definitly because it is build for debug and not release... I will post the code to henri and ask him to try?

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Rudi Grobler

"Good bye!" at exit is very encouraging as it's exactly what you should get. Hmm, so was this with the newest driver ? Did you get it running without the error dialog ?
I got the code from Rudi and I'm planning to check it tomorrow.

"Good bye" only appeared in 8-bit mode, which just showed a blank screen otherwise. 4-bit mode showed string of a few weird characters. i can take pics if you think it would help.

Finally tested the code rudi sent me. It didn't work with the 20x2 display I tested with which didn't have RW grounded. I modified the driver so that it always drives RW (lpt pin 14) to low and now it is working with my display in 8bit mode.

http://www.skippari.net/lcd/alpha/hd44780_driver.dll

Let us know how it works.

no error message anymore: same symptoms as before though. 8 bit mode has nothing but upon exit has a "Good Bye!". Standard 4 bit mode has 2 bizarre characters that alternate (i can get my roommate to take a digital pic if you want). 4 bit mode is blank all the time.

This might be something about the timing then. In fact at the exit it's working perfectly like it should when it prints the "Good Bye!" text. Unfortunately for some reason it isn't that happy during normal use.

Timing change in the driver might fix it so it's worth trying. Driver with modified timing will be coming...