Nokia LCD Display with Mbed Processor

All,

I have connected the Nokia LCD successfully to the Mbed processor and it works. The only thing I can’t understand is that the contrast changes about once a second or so. Does anyone know why this is happening? Or how to stop it from doing this? The contrast is set in the initialization of the display. It has a range of 0…63, and is set at 29.

Please advise.

Thanks and Regards,

Jim