Interfacing with Arduino I2C LCD

[EarlyBird2]

Can't find info on $44, and can't see what's in this zip on my phone:

https://bitbucket.org/fmalpartida/ne...stal/downloads

I'd be curious to see all the stuff in version 1.2.1.

Robert

Compare this code with Darrel's the one obvious issue is that the LCD is in 4 bit mode which requires the upper nibble and lower nibble to be sent separately. One other concern is that of setting the RS bit for data mode which is done once after initialisation. Does this not need doing every time a data nibble is sent?

[EarlyBird2]

Is it pure coincidence that all the upper nibbles are $4?

[doctordhd]

I believe this may be my first post to this forum...

Has anyone figured more of this out? I finally got my I2C serial adapter for the 1602 LCD to do something at least.

It was indeed very helpful to see the original code posted. Somehow my default address is $40.

When I use the code provided, I do get the display to light up and display "HELLO RCG! but when I try to change the initials to DHD, using the hex codes for D = $44, H=$48, and D=$44, I get THD in the display.

I am also looking for a bit more help with the control characters, and why the LCDWRITE routine needs 3 i2cwrite commands.

Thanks from noob Dave

[EarlyBird2]

There is information here.

http://www.picbasic.co.uk/forum/showthread.php?t=19222

[richard]

and here if you have pbp3
http://support.melabs.com/threads/98...F8574-20x4-LCD

[doctordhd]

Great, thank you. Lots of information in those posts.

[doctordhd]

Hmm, I am still having difficulty with this even after reading the above referenced threads.

I am working with PBP 3.0.7.0 and a pic 12F629. I am able to get the code writen by norohs (above) to work but I am having difficulty figuring it all out so that I can modify it for my own use.

Basically, I'd like to send some data and or ascii from my 12F629 to my LCD1602 via the I2C "adapter".

Can someone give me a bit more guidance?