After bootloading a 16f877a how can i get back rx tx ?

[mister_e]

Once you enable the USART, like the Bootloader do, you can't use RX/TX pin with serout. Use HSEROUT instead... OR get rid of all DEFINES, and disable SPEN bit....

Your program shouldn't finish like that... use STOP of do a loop.

[camolas]

Hi ive used HSEROUT in my code but dont work, im new at this for other person my be very simple but not for

Please can you explain me in a beginer mode?

Is how i used the HSEROUT


Code:

DEFINE LOADER_USED 1
@ device hs_osc
define osc 20
Include "modedefs.bas" ' Include serial modes

DEFINE HSER_BAUD 9600 'Hser baud rate
DEFINE HSER_SPBRG 129 'Hser spbrg init
DEFINE HSER_RCSTA 90h 'Hser receive status init
DEFINE HSER_TXSTA 24h 'Hser transmit status init
DEFINE HSER_CLROERR 1

TrisB.5=0
TrisC.6=0
TrisC.7=1
B0 var byte

High portb.5
Pause 500
Low portb.5
Pause 500
High portb.5
Pause 500
Low portb.5
Pause 500




serout2 portc.6, 32, ["AT", 13]
serout2 portc.6, 84, ["AT+CMGF=1", 13]
serout2 portc.6, 84, ["AT+CSCA=+351xxxxx000", 13]
serout2 portc.6, 84, ["AT+CSCA=+3xxxxxxxxx0", 13]
serout2 portc.6, 84, ["ola", 13]
end



Thanks,


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[mister_e]

        DEFINE LOADER_USED 1
        define OSC 20     ' Check the spelling of OSC, must be in capital letter
        
        Include "modedefs.bas" ' Include serial modes
        
        DEFINE HSER_RCSTA 90h ' Enable serial port & continuous receive
        DEFINE HSER_TXSTA 24h ' Enable transmit, BRGH = 1
        DEFINE HSER_SPBRG 129 ' 9600 Baud @ 20MHz, 0.16%
        DEFINE HSER_CLROERR 1 ' Clear overflow automatically
        
        TrisB.5=0
        TrisC.6=0
        TrisC.7=1
        B0 var byte
        
        High portb.5
        Pause 500
        Low portb.5
        Pause 500
        High portb.5
        Pause 500
        Low portb.5
        Pause 500
        
        HSEROUT ["AT", 13]
        HSEROUT ["AT+CMGF=1", 13]
        HSEROUT ["AT+CSCA=+351xxxxx000", 13]
        HSEROUT ["AT+CSCA=+3xxxxxxxxx0", 13]
        HSEROUT ["ola", 13]
        STOP
        end

[camolas]

Steve it works very well, thanks a lot for the patience to teach a beginer like me.I will learn this one more lesson.
Sory abouht the box of the code next time i will put it there.

p.s. If you need same thing from Portugal let me now.

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