LK204 display problem

zooz · Post by **zooz** » Tue Aug 11, 2009 1:56 pm

Hi,

I just bought a LK204-7T-1U. I got my microcontroller to communicate with it successfully over RS232. However, I realized that I am only able to display 3 lines of text on the screen. From what I see in the LK204 technical manual, it appears that I should be able to display 4 lines of text. Any idea what I am not doing right?

Thanks in advance.

Raquel · Post by **Raquel** » Wed Aug 12, 2009 9:24 am

Hi zooz,

Thank you for posting on the forum.

Yes, the LK204-7T-1U is a 4 rows x 20 columns alphanumeric display, so you should be able to display characters on the 4th line.

Have you tried the display on a PC? If you please disconnect your uC for now, and connect the display to a PC using either Hyperterminal or Matrix Orbital's uProject and send text to the LK204-7T-1U. It should start displaying the text on the screen.

Send enough characters to fill the whole screen; check if the 4th line displays characters.

Please let me know how it turns out.

Thanks,

zooz · Post by **zooz** » Fri Aug 14, 2009 2:36 pm

Hi Raquel,

Thanks for the suggestion. I tried sending text using uProject and it displayed on 4 lines. I'll need to revise my microcontroller code.