Problems controling cfah1602a ggb-jp with bs2
I have now used 3 sources of test code to get the parallel lcd to work. None of them seem to work for me. I am connecting to different pins of the bs2 than the examples, but I have double (and triple) checked the changes I made.
I have used examples from the following web sites:
http://www.weethet.nl/english/basicstamp2_lcdcontrol.php
http://www.parallax.com/Downloads/Documentation/audiovis/Parallel_LCD_Manual.pdf
http://www.crystalfontz.com/products/1602a/CFAH1602AYYBJP.PDF
The last (from this website) didn't have sample code, but I coded from the sample algorithm.
I'm attempting 4 bit communication.
The code from the first site, and this site, gives me 2 solid lines.
The code from the second site gives me 1 solid line.
My pin connections are
BS2_LCD_LCDLabel
8___11__DB4
9___12__DB5
10__13__DB6
11__14__DB7
12__6___E
13__4___RS
5V__2___VDD
GRD_1___VSS
GRD_3___VO
GRD_5___RW
I have adjusted for the nibbles to be sent to outC and that my RS & E are in a different order than most examples.
I understand why 5 is grounded and I think I understand why 3 is grounded.
I've now been working on this for 2 days, any help would be appreciated.
I have now used 3 sources of test code to get the parallel lcd to work. None of them seem to work for me. I am connecting to different pins of the bs2 than the examples, but I have double (and triple) checked the changes I made.
I have used examples from the following web sites:
http://www.weethet.nl/english/basicstamp2_lcdcontrol.php
http://www.parallax.com/Downloads/Documentation/audiovis/Parallel_LCD_Manual.pdf
http://www.crystalfontz.com/products/1602a/CFAH1602AYYBJP.PDF
The last (from this website) didn't have sample code, but I coded from the sample algorithm.
I'm attempting 4 bit communication.
The code from the first site, and this site, gives me 2 solid lines.
The code from the second site gives me 1 solid line.
My pin connections are
BS2_LCD_LCDLabel
8___11__DB4
9___12__DB5
10__13__DB6
11__14__DB7
12__6___E
13__4___RS
5V__2___VDD
GRD_1___VSS
GRD_3___VO
GRD_5___RW
I have adjusted for the nibbles to be sent to outC and that my RS & E are in a different order than most examples.
I understand why 5 is grounded and I think I understand why 3 is grounded.
I've now been working on this for 2 days, any help would be appreciated.
Looking for additional LCD resources? Check out our LCD blog for the latest developments in LCD technology.
Last edited: