Here some piece of my C code that i used in my PICextern 4X

mIGUEL

#include <17c42.h>
#include <math.h>

long far *p;
char far *q;

unsigned char Tam_H;
unsigned char Tam_L;
long Total, L;
long I,Pausa;

unsigned char Lixo;

unsigned int w;
unsigned char c,t,o;

void __PIV()
{
       #asm
            MOVFP W,0x1F
            MOVLW 0x20
            MOVPF W,PCLATH
            LCALL 0x20
            MOVFP 0x1f,W
            RETFIE
       #endasm
}

///////////////////////////////////////////////////////////

void __INT()
{
       #asm
            MOVFP W,0x1F
            MOVLW 0x20
            MOVPF W,PCLATH
            LCALL 0x08
            MOVFP 0x1f,W
            RETFIE
        #endasm
}

///////////////////////////////////////////////////////////

void __TMR0()
{
       #asm
            MOVFP W,0x1F
            MOVLW 0x20
            MOVPF W,PCLATH
            LCALL 0x10
            MOVFP 0x1f,W
            RETFIE
        #endasm
}

///////////////////////////////////////////////////////////

void __RTpin()
{
       #asm
            MOVFP W,0x1F
            MOVLW 0x20
            MOVPF W,PCLATH
            LCALL 0x18
            MOVFP 0x1f,W
            RETFIE
        #endasm
}

void Transmite(unsigned char c)  <-----------------------------Here transmite!
{
    while(!PIR.TBMT);
    TXREG=c;
}

unsigned char Recebe()
{
    while(!PIR.RBFL);
    return(RCREG);
}

void inicializa_serial() <-----------------------Initialize serial
{
    SPBRG=7;  //19200 a 10MHZ
    TXSTA=0xA0;
    RCSTA=0x90;
}

void Delay()
{
    for(Pausa=0;Pausa<=250;Pausa++);
}

void main()
{
    inicializa_serial();

    Transmite('M');
    o=Recebe();   //P=PROGRAMA  N=NORMAL

    Transmite('M');
    Tam_H=Recebe();
    Transmite(Tam_H);
    Lixo=Recebe();

    Transmite('M');
    Tam_L=Recebe();
    Transmite(Tam_L);
    Lixo=Recebe();

    Total=Tam_L+(Tam_H*256);

    for(I=0x2000;I<(0x2000+Total);I++)
        {
            p=I;
            q=I;

            Transmite('M');
            w=Recebe();
            *p=w;
            if(o=='P')
               Delay();
            w=*p;
            Transmite(w);
            t=Recebe();

            Transmite('M');
            c=Recebe();
            *q=c;
            if(o=='P')
               Delay();
            c=*q;
            Transmite(c);
            t=Recebe();
        }
        t=Recebe();
       #asm
            MOVLW 0x20
            MOVPF W,PCLATH
            LCALL 0x00
        #endasm
}




Miguel


Jonathan ferguson wrote:
>
> Can some one Show me how to output, through the USART on a PIC17c43, say 2
> or 3 bytes of data one after another.  I can now output one byte but I can't
> get it to output more that one here's the code I've been playing with but
> all this does is crash my PC
>
> ##############################################################
> LIST   P=PIC17C43
>  #INCLUDE <P17C43.INC>
>
>   ORG 0
>
>                           MOVLW 0X4  ;INIT
>                           MOVWF SPBRG
>                           BCF TXSTA , SYNC
>                           BSF RCSTA , SPEN
>
>                           MOVLW 0X43  ;NEW DATA
>                           MOVWF TXREG  ;MOVE TO TXREG
>                           BSF TXSTA , TXEN ;SEND
> LOOP                NOP
>                           NOP
>                           NOP
>                           NOP
>                           NOP
>                           NOP
>                           NOP
>                           NOP
>                           BTFSS TXSTA , TRMT ;POLL TRMT TO SEE WHEN TSR IS
> EMPTY
>                           GOTO LOOP
>                           CLRF TXREG , F  ;NOT SURE IF THIS NEEDED
>                           BCF TXSTA , TXEN ;DISABLE SEND
>                           MOVLW 0X43  ;NEW DATA
>                           MOVWF TXREG  ;IN TXREG
>                           BSF TXSTA , TXEN ;SEND
>
>                           GOTO $
>
>                           END
>
> ######################################################################
>
> Thanks in advance
>
> Regards
>
> Jonathan Ferguson