HSER baudrate

[pedja089]

Hello,
I'm not very familiar with the hardware serial port. So far I have used define.
But when I tried this:

HSerBaud var byte
IF HSerBaud=0 THEN
 DEFINE HSER_BAUD 300
ENDIF
IF HSerBaud=1 THEN
   DEFINE HSER_BAUD 2400
ENDIF
IF HSerBaud=$BD THEN
   DEFINE HSER_BAUD 9600
ENDIF

I got an error, Redefininig symbor that can not be redefined...
I do not know what registers should be set to change the baud rate.
If you can help, so I would not read the whole datasheet. I'm using PIC18LF14K50.
Thanks

[Archangel]

That's is correct as far as I know, you cannot redefine it in running code, you can however select it in the beginning as your PIC starts. Look at the code example in the lower 1/2 of this article. I show you how to do it there.

http://www.picbasic.co.uk/forum/content.php?r=171-LCD-serial-backpacks

[mackrackit]

If you need to change the baud rate during run time do not use defines. Deal with the registers directly.

X VAR WORD
    START:
     RCSTA.4 = 0 : RCSTA.4 = 1
     RCSTA=$90:TXSTA=$24:SPBRG=129
     HSERIN [dec X]
     HSEROUT [DEC X.7,13]
blah
blah

[Archangel]

or there's Dave's way . . .

[mister_e]

When changing baudrate on the fly, you want to turn off the USART before though.

RCSTA=0
SPBRG=xyz
TXSTA = whatever, assuming it's value change from baudrate to baudrate
RCSTA=$90

[pedja089]

Thanks, guys.
Both examples helped me. Just to see which registers should be set. Today I'll try ..