Pic18f4550 hserout

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  1. #1

    Default Pic18f4550 hserout

    Hi Guys, Wonder if any one can point out the difference between the PIC18 and PIC 16 HSEROUT commands.
    I normally use the following code in my PIC 16 programs,
    '*Serial port Setup 9600 8E1*
    DEFINE HSER_BAUD 9600 ; 9600 Baud
    DEFINE HSER_CLROERR 1 ; Clear overflow automatically

    I now want to make use of a PIC18F4550
    the following code work at 38000 baud
    '*Serial port Setup 3800 8N1*
    DEFINE HSER_RCSTA 90h ' Enable serial port & continuous receive
    DEFINE HSER_TXSTA 24h ' Enable transmit, BRGH = 1
    DEFINE HSER_CLROERR 1 ' Clear overflow automatically
    DEFINE HSER_SPBRG 56 ' 38400 Baud @ 48MHz, -0.16%
    SPBRGH = 1
    BAUDCON.3 = 1 ' Enable 16 bit baud rate generator

    Is there any way I can get it configured to run 9600 8E1, I have tried changing the HSER_SPBRG value but with no success I also want to activate the parity.

    Any leads would be welcomed.

  2. #2
    Join Date
    Jan 2005
    Montreal, Quebec, Canada

    Default Re: Pic18f4550 hserout

    No reason why you couldn't. Have you made sure you're not missing any CONFIG? Try to blink an LED first when in doubt.

    Have you tried Mr E's USART Utility to generate the DEFINES?

    Last edited by Demon; - 8th September 2014 at 20:29. Reason: MultiCalc: http://www.picbasic.co.uk/forum/showthread.php?t=4994

  3. #3

    Default Re: Pic18f4550 hserout

    It seems to be the 16 bit baud rate generator that is creating the problems as soon as you disable it everything works

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