Hi Ted, You'll want to make sure that the unit is responding via I2C rather than RS232. To do this, you'll have to issue the command found in your manual under the communication setting. It'll be three (3) bytes total, 254, 160, then a 0 or 1 depending on whether transmission in RS232 is turned on ...

jheiv wrote:It works great! Thanks again for your time. If anyone is needs code that uses the hardware MSSP peripheral on a PIC this code works now!

Thanks again.
-Jim

Were you ever able to get the i2c_read to work? Or only writing to the display.

-Ted

I have a GLK19264-7T-1U. I can control the display with i2c, and display information with no problem. However, I cannot get the read to work. I am trying to read the keypad. I am using a CCS compiler on a PIC18F252 chip, with a hardware i2c controller on board. My read routine looks like: i2c_start(...