HOW TO RECIEVE AND HANDLE THE STRING DATA COMMING FROM SERIAL PORT

i m on a project to interface a GSM modem with 8051


snd and receive message.




how can i receive string data from serial port.



i can send string data using

printf command

i have sent and recieve messages from modem using hyper terminal


and where tne CTS and RTS of RS232 are connected with 8051?????????



i shell b thank frull if u can help me .............

which gsm module are u using???

sir i m using samsung c100 mobile

i have sent message n receive messages from it using hyperterminal

n the 2nd problem is that how a new message is idetified ????????/

i know the command but it just reply ok

i send a message n tried to read it using

AT+CNMI

it just reply ok

not it read the message



n i already told te basic problem that how can i convert data in bytes in SBUF
to a string data????????


plz give me sum hints

to identify a new msg...
start with your inbox totally empty
read:
then keep sending command at+cmgr=1 (with some delay) and receive string every time.then compare it with "ERROR" ( or the actual string wich u get wen inbox is empty).
if result is false...
then process the string according to ur requirement and delete that msg.
after that
goto read