Software serial communication Port for 8051

what is the problem using this kind of code?

just create a new file "softuart.asm" then copy paste the whole code..
then add this file along with your assembly files in the same project.

or.. if you are feeling ok with the above thing then
just copy the subroutines..
_putc and getc in your asm file it will work. you can rename _putc to putc only.

sir,
Thanku sir,
Now, I am usingt putc & getc in my code as subrouting..Is it ok?


I am using this port to communicate my GSM modem...I connect GSM successfuly with Microcontroller....My task is as.......
I am sending data of sensor to PC through one Serial Port and another serial portt useing for GSM Modem...
I want continuos transmition of data Pc
and response to GSM modem only when New message is arrive....
What should i do for both comunication?
How to use derial communicaton interrupt here?

the thing is.. its software uart and its not made for such critical work.
it can provide a well working UART on any two pins but for normal use..
no interrupts.. or anything like that. also.. i cannot assure you how will it react if you send and receive one after the other..