pi4j Getting wierd characters on QC2004A

[aphtk]

I am having the same issue as --> #13

I am pretty sure the wiring is correct.
I am using WiringPiLCDExample.java as my base.
I am setting the LCD to 8-bit mode and rows = 4 columns = 20
I have the following setup using wiringpi numbering convention (ref. to http://pi4j.com/pins/model-b-rev2.html):
D0 = 0
D1 = 0
D2 = 0
D3 = 0
D4 = 2 // gpio pin 13
D5 = 3 // gpio pin 15
D6 = 4 // gpio pin 16
D7 = 5 // gpio pin 18

I have the p5 header soldered and tested to work and using:
RS = 17
E = 18

I am pretty sure that LCD panel is working correctly, as it was tested with adafruit's python library (although I could never get extended ASCII to show).

When I run the code (with the required pin # changes), all I am getting is some "o" and "->" and blinking cursor at the end.

Can you let me know what I might be doing wrong here?

[savageautomate]

Hi aphtk,

If you are using 8 bit LCD you need individual pins connected and assigned D0 thru D3.

Here is a pictorial diagram from Gordon's WiringPi site for 8 bit connected LCD.

More details here:
http://wiringpi.com/dev-lib/lcd-library/

[aphtk]

Thanks for your reply. Found that inspite of whats on the package qc2004a is a 4bit LCD. Also p5 header did not work. Std. pins worked.