Problem with 4x20 Serial LCD...

jcpole

I'm dying to get some opinions on this one.

I just received a new 4x20 Parallax Serial LCD (Not the blue one), and I'm having a problem getting it to work with a BS2PX on a PDB.· Just for kicks, I plugged the LCD into my BOE with a Javelin, and it works just fine.· I know that the problem is not the LCD, or it wouldn't have worked on either board (please tell me if I'm wrong about this point).

When I plug the LCD into the PDB, running the demos only serves to move the cursor around the screen to various locations, but no text ever shows up.· Eventually, the cursor just goes away entirely.· I've tried a bunch of different demo programs, and none of them work with this LCD and the PDB.

By the way, the LCD runs in test mode just fine - it shows the Parallax splash screen, just like it is supposed to.· I've checked baud rates, and they match.· I've also tried different pins/sockets to no avail.· I do my development on this PDB (and this BS2PX), so I know that both are good.

Any ideas?

Thanks...

Jamie


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Jamie C. Pole
Principal Consultant
J.C. Pole & Associates, Inc.
http://www.jcpa.com/

Jon Williams

It may be a baudmode issue -- I just ran the standard demo on a BS2px and it ran fine.· Here's the conditional compilation block for SEROUT that I use for the serial LCD:

#SELECT $STAMP
· #CASE BS2, BS2E, BS2PE
··· T2400······ CON···· 396
··· T9600······ CON···· 84
··· T19K2······ CON···· 32
· #CASE BS2SX, BS2P
··· T2400······ CON···· 1021
··· T9600······ CON···· 240
··· T19K2······ CON···· 110
· #CASE BS2PX
··· T2400······ CON···· 1646
··· T9600······ CON···· 396
··· T19K2······ CON···· 188
#ENDSELECT

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Jon Williams
Applications Engineer, Parallax

jcpole

That was it...

Thanks very much Jon!· Gotta love support at 2:00am...

Jamie



▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
--
Jamie C. Pole
Principal Consultant
J.C. Pole & Associates, Inc.
http://www.jcpa.com/