Timer vs USB_UART?

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Anonymous
Not applicable

Does anyone have any idea why a 16 bit fixed function timer, that interrupts about every 4s,  would interfere with USB_UART operation?  

   

I'm debugging my current boards  (with a CY8C5667LTI-LP041) ,  which show up on Device Manager on an appropriate COM port, but will not connect to putty (and yes, I've double checked my serial settings) .

   

I've turned everything in code off one-by-one until USB_UART is permanently on.  

   

With the Timer_Start(),  the USB will not connect, but if I comment that out, USB will connect to putty again.

   

The odd thing is that I have another timer, a 32B UDB timer, that does not interfere with the USB_UART at all.

   

Both timers are software enabled, have dynamic periods based on software, and cause external interrupts. 

   

 

   

Any advice would be appreciated.

   

Thank you

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