> -----Original Message-----
> From: Roberts II, Charles K. [SMTP:robertsck@ORNL.GOV]
> Sent: Tuesday, September 30, 2003 3:49 PM
> To:   PICLIST@MITVMA.MIT.EDU
> Subject:      Re: [PIC]: Writing data out using  USART
>
> >Just checking the simple things first:
>
> >Do you have a ground connection between the PIC and the PC and have you
> >verified it?
>
> Yes, I build a level converter box that uses a MAX232 to covert the RS
> 232 voltage levels to the PIC can read. I know that for sure that
> between the converter and the PC that there is a ground connection. But
> there is no signal ground connection between the converter and my PIC
> board. Could that cause the problems?
>
It could cause all sorts of problems.  You must have a signal ground between
the MAX232 and the PIC.

Mike




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