> Does your lcd_putsf function poll the LCD's busy flag?  If not you may be
> trying to write to the LCD while it's still processing a previous command.
>
> Mike

thanks for answer !!!
I solved the problem, there was a problem in lcd_putsf function and also in
hardware input pins.

best regards,
Marco Trapanese

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e-mail: marcotrapanese@tin.it
web: http://members.xoom.it/m_trapanese

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