James,

I think you have a problem with the values you are using with the
delay function:

nCycles = nMilliseconds * CYCLES_PER_MS

In your example nCycles = 500 * 500 = 250000 cycles. This is too
big for an int, and will cause an arithmetic overflow. Probably the
code is running but the delay is so short you can't see it!

Brent Brown
Electronic Design Solutions
16 English Street
Hamilton, New Zealand
Ph/fax: +64 7 849 0069
Mobile/text: 025 334 069
eMail:  brent.brown@clear.net.nz

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