How many Stream's Can I Use?

[bertronicom]

How many diferent serial ports can be used by the way of Stream?

#use rs232(STREAM=HOST_id, baud=9600,parity=N,xmit=HOST_TX,rcv=HOST_RX,bits=8)

#use rs232(STREAM=BT_id, baud=9600,parity=N,xmit=BT_TX,rcv=BT_RX,bits=8)

I'm working with CCS last version, and I'm sucessfully work with 2 conections.

[SherpaDoug]

I am using three streams on a 16C771, but I suspect the only limits are RAM and ROM space. What chip are you using?
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[Haplo]

In theory, there are is limit to the number of streams you can use. As SherpaDoug said the limiting factor is the code space, and also availability of I/O pins (althoug you can define two different streams on the same pins).
I have used 4 without any problems.

[bertronicom]

Hello SherpaDoug, I'm using PIC18LF252 at 3.3volts.
I've configured two RS232 serial ports.

#use rs232(STREAM=HOST_id, baud=9600,parity=N,xmit=HOST_TX,rcv=HOST_RX,bits=8)
#use rs232(STREAM=BT_id, baud=9600,parity=N,xmit=BT_TX,rcv=BT_RX,bits=8)

void main () {

fprintf( BT_id , "INQUIRY 5 NAME\n\r");
fprintf( HOST_id , "\n\rRx Comando: INQUIRY_NAME");
}

In this case de first fprintf works but not second.

void main () {

#use rs232(STREAM=BT_id, baud=9600,parity=N,xmit=BT_TX,rcv=BT_RX,bits=8)
fprintf( BT_id , "INQUIRY 5 NAME\n\r");
#use rs232(STREAM=HOST_id, baud=9600,parity=N,xmit=HOST_TX,rcv=HOST_RX,bits=8)
fprintf( HOST_id , "\n\rRx Comando: INQUIRY_NAME");
}

This code works.
Theoretically the first code would work ¿isn't so?


Hello Haplo, Are you saying you're multiplexing two pins to diferents RS232 conections?
It's working fine?


thanks everyone

[treitmey]

I think I do something like this too.

[Haplo]