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Hello,

I am using the basic USB example on WinARM from
http://www.siwawi.arubi.uni-kl.de/avr_projects/arm_projects/index_at91.html#at91_usb1,
namely the AT91SAM7 USB Example 1.


Additionally, I am using PWM mapped to PA0 to PA2, 10kHz PWM, Period
of 4800, Duty Cycles of 1200, 2400 and 3600.


If I comment the PWM part and run only the USB, it runs just fine and
the PC detects the AT91. If I have both PWM and USB running, the PC
does not recognize the AT91 device anymore.


Does someone have any idea why, and how to fix that? Could it be a
matter of noise on the PCB or similar HW issue? Or is it some
register
configuration which I am overlooking?


Thanks a lot.