Using the 7-Segment LED Display on the PDB.

latigerlilly

Hi guys,

I used the following set-up in the pic and the following program to run the 7-segment LED display on the PDB. I should get the lowercase "d" displayed, but, instead, I'm getting a funny symbol. Please advise what I did wrong. Thank you.


Much appreciation,
Lilly.



' Experimental Program - experiment.bs2p
' {$STAMP BS2p}
' {$PBASIC 2.5}
DEBUG "Program Running!"
DO
MAINIO
LOW 5
HIGH 7
AUXIO
HIGH 14
HIGH 10
HIGH 8
HIGH 9
LOOP

Manufacturer's Schematic: www.parallax.com/dl/docs/prod/boards/PDB-RevC-Schematic.pdf

Post Edited (latigerlilly) : 2/4/2007 7:58:13 AM GMT

PAR

latigerlilly said...
Hi guys,

I used the following set-up in the pic and the following program to run the 7-segment LED display on the PDB. I should get the lowercase "d" displayed, but, instead, I'm getting a funny symbol. Please advise what I did wrong. Thank you.


Much appreciation,
Lilly.
...
Manufacturer's Schematic: www.parallax.com/dl/docs/prod/boards/PDB-RevC-Schematic.pdf

Did you remove the sx28 chip from the other socket?

PAR

latigerlilly

Oops, I forgot to tell you. All I have is a BS2p40 chip. I do not have a sx28 chip. The sx28 socket is empty.

latigerlilly

Hmm, it works when I switch pins 13 and 12 for pins 8 and 9. Either my BS2P40 is defective or my PDB is defective or I have dirty contacts between my chip and board. I will clean the contacts and see.... I will use my BS2 Rev G on my PDB and see. That way, I can isolate the problem. However, I may not be able to isolate the problem because I do not have another BS2P40. I also do not have any extra PDB. Maybe I should call Parallax for an exchange of PDB and PS2P40.... What do you think, guys?

latigerlilly

I cleaned the terminal pins on the chip with a lens cloth and now it works! I think maybe my hands were a bit greasy when I originally installed the chip (doh!). Thanks anyways, guys!