hserout PIC pic 16F876

[mister_e]

Apologize for poor english , i was a bad boy at school ...
Vincent

don't be afraid of that...

Everything is ok in both speed, but i can't switch from one to another ...

It seems that new define are not allowed during execution ...

And writing to regsiter seems to confuse HSEROUT ...

can you something for me. I'm not sure it's gonna work but... worth a try

Let's assume you have a 20MHZ crystal.

Refer to the table 10-4:
SPBRG=129 '@9600 bauds
SPBRG=64 '@19200 bauds


IMO we can change the baud rate only by changing the value of the SPBRG register.

so give a try to this snipet

DEFINE OSC 20

start:
     TXSTA=$24
     RCSTA=$90
     SPBRG=129  '@9600 bauds
     pause 100 'try to remove this pause after
     HSEROUT ["comm @9600 bauds"]
     TXSTA=$24
     RCSTA=$90
     SPBRG=64  '@19200 bauds
     PAUSE 5000 'wait 5 seconds
     HSEROUT ["comm @19200 bauds"]
     goto start

let me know... i'm curious.

If it's working, try to define TXSTA and RCSTA only one time at the begining to see if it's also work.

DEFINE OSC 20
     TXSTA=$24
     RCSTA=$90

start:
     SPBRG=129  '@9600 bauds
     pause 100 'try to remove this pause after
     HSEROUT ["comm @9600 bauds"]
     SPBRG=64  '@19200 bauds
     PAUSE 5000 'wait 5 seconds
     HSEROUT ["comm @19200 bauds"]
     goto start