In SX Microcontrollers, SX/B Compiler and SX-Key Tool, tdg8934 wrote:

Well, I figured out what the problem was..Kind of embarrasing too but...

On the PDB, I had the 4028 Vcc pins connected to GND and the 4028 GND pins connected to Vcc. (also had 1 7404 inverter wrong too). All those wires...

When I fixed this messages starting going across with inverse lettering (cool all the same). In the SX/B code I changed 1 line of code to get it to work correctly with LOW rows and HIGH columns.

 I changed this:

RC = Display( RA )     'LOAD NEW ROW DATA TO RC

to this (begining of the SX/B code)...

RC = [b]NOT[/b] Display( RA )     'LOAD NEW ROW DATA TO RC

 

 

 

Now I get it to work beautifully. 

 

What I will do next is modify the code (and add another 4028) to add another 5 columns of LEDs (20 x 7 display) and the original Robolympic uses 15 x 7. 

 

Thanks Jon!!

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