RE: Now what???

robotonics — Sat, 21 Apr 2012 14:53:45 GMT

I am looking at the development board circuit and your schematic...but you seem to be in need of inspiration...so a few suggestions...

You could possibly have programmed a bootloader into the pic and then created a pure USB application with any further programming changes via USB. No need for the ICSP circuit then and will save components.

Or you can still program the bootloader and ignore the ICSP from then on...I suppose whilst developing it would be usefull to keep the ICSP.

I would have used a diode on the MCLR to block any voltages from the VPP voltages upsetting the 5V power...so chip can get power through pull up res, but voltage from ICSP will be blocked...will dig out a few pics!

There are lots of applications provided by Micrcochip for USB applications in the MAL library...I havent used the new K chips yet but can see that a few applications are supported...you would see your dev board as a low pin count board...microchip provides hardware definition .h files for this....

more soon!