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I'm using the U2 programmer with an EPIC 28/40 pin adapter and 4.50 Beta software
programming PIC16F1783 chips. They program once ( PBP3 hex file ) and then have a code error at
0000 next time;...

Paul,

You are correct, the pc seems slow to respond sometimes at it's own whim, same as you experienced with your pic-scope. You mentioned interrupt or asyncronous transfers as a solution; do you...

USB latency seems to vary from about 1 msec to 15 msec and back to 1 msec every few seconds like a heartbeat; very regular! Using a 4550, PBP easy-HID template and a loop of writebacks from...

Any hope for support for dsPIC30F's? Hate to have to switch horses.

You have also to change the descriptor file report size to match ( both input & output ) as well as your application; go back to easyHID again but I think it only allows 8,16,32 or 64 byte sizes.

EasyHID was easy, but is slow ( I occasionally see latencies up to 150 MSEC ) ; any ideas how to speed it up or make it more consistant? Or how to get started with a different class using PBP?