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also check BRGH bit

promero wrote:

> check and re-check:
>
> - PC configuration:
>   * Number of Data bits.
>   * Number of Stop bits.
>   * Baud Rate.
>   * Flow Control.
>   * Parity.
>
> - PIC Configuration:
>
>   * Number of Data bits.
>   * Number of Stop bits.
>   * Baud Rate.
>   * Bit 9 enable/disable.
>   * SPBRG value.
>   * Asynchronous/synchronous mode.
>
> "Hartung, Greg" wrote:
>
> >    I am transferring a project from wirewrap to etched PCB.  Each section of
> > the wirewrap board is being moved to a separate module with pc/104 stackthru
> > connectors.
> >    Everthing was going fine until I got to the RS-232 section.  It uses the
> > USART of a 16c774 and a Dallas ds275.  It is not identical to the wirewrap
> > design, as I removed a switching relay because I no longer need to talk to 2
> > devices, which makes it much simpler.  The wirewrap board works.  The etched
> > board, however, transmits exactly the corect # of character (to a PC, no
> > flow control, 115kbps), but they are the incorrect characters.  I put a
> > simple "echo" program in the PIC to check.  I press an "A", I should get an
> > "A" back, but instead I get some other character, but always the same
> > incorrect chacter for a given key.  I checked the math to see if it was a
> > simple pattern (bit 8 or something), but no pattern.  Some keys produce the
> > same hex value.
> >    I tried different chips, eliminating unnecessary modules (only the
> > processor, PS, and serial boards are left), different bauds, and have
> > checked the boards for shorts, etc.
> >    Any ideas?
> >    Thanks.
> >
> > Greg Hartung
> >
> > --
> > http://www.piclist.com hint: To leave the PICList
> > mailto:piclist-unsubscribe-request@mitvma.mit.edu

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