1. I assume that because you are using 129 for SPRG
& 9600 baud, that your clock speed is 20 MHz, right ?

2. The code should run as is, starting outputting
a null (0) follwed by the control codes, and other
printables. Perhaps you wanted to pre-load the
counter with the 0x20 (ASCII space) so you
can see printables appear in your terminal
at the other end ?

3. you didn't really say what wasn't working - if it couldn't
compile (with MPASM) then add

     list     p=16C876
     #include p16C876.inc

at the top.

HTH


----------------------------------------------
Kenneth C. Finney
==============================================
Wilkes Associates, Inc.
Software Engineering - Embedded Systems
Design & Development - Project Management
==============================================
170 The Donway West Ste. 405, Toronto, Ontario
Office: (416) 445-9224 Mobile: (416) 453-6400
----------------------------------------------

 > -----Original Message-----
 > From: pic microcontroller discussion list
 > [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Paul A Brown
 > Sent: Wednesday, August 04, 1999 11:38 PM
 > To: PICLIST@MITVMA.MIT.EDU
 > Subject: Hardware Serial Ports
 >
 >
 > I have some questions regarding the use of the hardware
 > serial port on a
 > PIC16F876.  All I want to do is initialize tbe serial port
 > to 9600 baud,
 > asynchronous and spew out some data.  I have looked at this
 > code until my
 > eyes hurt, but to no avail.  Could somebody point out where
 > I am going
 > wrong?  Does anyone have any sample transmit or receive code for the
 > hardware serial ports that they would like to share?
 >
 > Thanks,
 >
 > Paul Brown
 >
 >
 > ; Registers
 > Cntr       equ  0x20
 >
 >
 > ;Initialize variables
 >  clrf     Cntr
 >
 >
 > ;Initialize serial port
 > SerInit
 >  bsf      RCSTA, SPEN
 >  bsf      STATUS, RP0
 >  bcf      TXSTA, SYNC       ;Asynchronous transmission
 >  bsf      TXSTA, BRGH       ;Baud rate generator to high speed
 >  movlw    129
 >  movwf    SPBRG             ;Set BRG for 9600 buad.
 >  bsf      TXSTA, TXEN       ;Enable transmit
 >  bcf      STATUS, RP0
 >
 > ;Main Program Loop
 > MainLoop
 >  bsf      STATUS, RP0
 >  btfsc    TXSTA, TRMT       ;Check for data sent
 >   goto    TxData
 >  goto     MainLoop
 >
 >
 > ;Increment Counter and Transmit
 > TxData
 >  bcf     STATUS, RP0
 >  incf    Cntr, 1
 >  movf    Cntr, 0
 >  movwf   TXREG
 >  goto    MainLoop
 >
 >  end
 >
 > ___________________________________________________________________
 > Get the Internet just the way you want it.
 > Free software, free e-mail, and free Internet access for a month!
 > Try Juno Web: http://dl.www.juno.com/dynoget/tagj.
 >