Software on PIC will come in loop after disconnect USB connection

[Squibcakes]

Hi DT,

Great! I tried this one and it works. Good one.

However, I've tried to incorp. it into an existing program and it doesn't work.

Your code seems to indicate that the USBSERVICE routine is continually called by the USB_int handler. How often does this interrupt? Only when it is plugged / unplugged or all the time?

The problem is that I'm servicing the USBSERVICE through a 1msec Timer1 interrupt handler and trying to read the flags in that interrupt but they don't set.

'---[TMR1 - interrupt handler]---------------------------------------------------
USB_SERVICE:                    ' COMES HERE 1msec TO SERVICE THE USB PORT
        
     T1CON.0 = 0                ' TURN OFF TIMER                 
        TMR1L = COUNTER1.byte0  ' RELOAD TIMER  LOW
        TMR1H = COUNTER1.byte1  ' RELOAD TIMER HIGH
        IF IDLEIF THEN Plugged = 0
        IF SOFIF  THEN Plugged = 1
        USBService	            ' KEEP USB ALIVE
     T1CON.0 = 1                ' TURN ON TIMER
    
    
@ INT_RETURN

The way I see it is that SOFIF should always be set since I'm servicing USB every 1 msec untill I disconnect the USB cable.

I would do away with the Timer1 Interrupt altogether and use USB_INT but how often does the USB_int get called?


Cheers
Squib