Multiple serial ports?

[Scottl]

I am using a PIC12F683 and want to relay messages received from a serial port out to another. I have setup the following for the serial ports:

#use rs232(baud=9600,parity=N,xmit=PIN_A1,rcv=PIN_A0,bits=8, STREAM=COM_A)
#use rs232(baud=9600,parity=N,xmit=PIN_A4,rcv=PIN_A5,bits=8, STREAM=COM_B)

I have enabled #int_RA and the following code:

[code]
#int_RA
RA_isr()
{

c=fgetc(COM_A);
d=fgetc(COM_B);

if (c == 88)
{
i = c;
fprintf(COM_A, "ibm");
break;
}

if (c == 17)
{
fputc(c, COM_B);
do {
c=fgetc(COM_A);
fputc(c, COM_B);
} while (c!=0);
c=0;
d=0;
}

if (d > 0)
{
fputc(d, COM_A);
do {
d=fgetc(COM_B);
fputc(c, COM_A);
} while (d!=0);
c=0;
d=0;
}

}
[/code]

What I want to happen is if data comes in on COM_A check first bit then either pass out to COM_B or break and use later in my code. Then if the data is sent out COM_B I will receive a message on COM_B immediatelly after the last character is send out. This data will be sent back to COM_A.

Is there a better way to do this? I want to try to use something like an interrupt because I never know when the request on COM_A will be coming!

Thanks in advance,

ScottL

[PCM programmer]

See this thread for an example of #int_ra:
http://www.ccsinfo.com/forum/viewtopic.php?t=28547