Software on PIC will come in loop after disconnect USB connection

[Darrel Taylor]

Using the USB_INT source is much more efficient than using a 1ms timer.

During Enumeration it may only be a few microseconds between interrupts, and there are a lot of them. Consequently, it connects to the PC much faster.

But during normal operation, it drops to about every 10-20 milliseconds, although that depends on the polling time set up in the descriptor.

When the cable is un-plugged, you don't get any USB interrupts at all (after the IDLE int).

Plus using the USB_INT frees up a Timer.

ADDED:

But that doesn't explain why the Plugged example above doesn't work with the Timer Interrupts. It should work.

Are there any other USBSERVICE statements in the program?
There should only be 1.

[Squibcakes]

DT,

What you say makes sense and I like the fact that it frees up a Timer.

I found in my original program that I missed (during a cut and paste) the section where you loaded UIE and UEIE with values... which would explain why it wasn't running with my timer ints....

The whole point of this exercise is to "error trap" the pic for any unforseen conditions, eg I've seen the PIC hang sometimes when shutting down pc coms programs that don't close the port nicely. Hopefully this will stamp that one out. LOL

Now, since you have all the answers, do you have tonight's Lotto Numbers by any chance?

Cheers
Squib

[Darrel Taylor]

... do you have tonight's Lotto Numbers by any chance? ...

Oh sure ... Here's the numbers for California's Super Lotto Plus, for all future draws.
Just come back here before each game for the new numbers.



Of course it would have been better, had you asked for "tonight's Winning Lotto Numbers"!

[Art]

Lol,
NVM. if the game is played long enough, they'll win at some stage.