Playing with J5 .... Can I divide it???

Design Concepts
1

Hi there!

I want to make a circuit as copact as possible for a clock and was hoping to use only a (custom miniature design) COre module.

I need 4 Douts and 4 Dins and was thinking of the J5 as DOUT or J5 as Din applincations…

Is there an easy way to Sub divide J5 into 4 ins and outs? or even better 2 Ains, 2 Dins, and 4 douts?

The ultimate plan whould be able to reconfigure these on the fly in the running application  ::slight_smile: !!

Any thoughts?

A late merry Xmas and best wishes to all !!

Alex

2

Hi Alex,

it isn’t so difficult to use some pins of J5 as digital input instead of output, the driver can be disabled by setting the appr. flag in the TRISA (port A pins of J5) and TRISE (port E pins of J5). Of course, once you did this, you have to enhance the application. I guess it’s enough to include j5_din.inc and j5_dout.inc into one application, and to add all the hooks to the main.asm (search for the hooks in the main.asm files of both applications)

Mixed digital pin/analog pin configuration: this is also possible, but not that flexible then choosing input/output behaviour.

Search in the PIC18F452 datasheet for “ADCON1” (in the datasheet you will also find the informations about the TRISx registers)

Best Regards, Thorsten.

3

Thanks Thorsten!

It’s now working great!

All the best,

Alex