GSM MODEM with 8051

hi kirangowle
TI is an transmit interrupt flag
TI_flag is any general bit
it can not be replaced with each other

Hi,

I have made little modification well this is also not working as per expected.
Problem is, for first msg working fine.
when i send another msg its entering into the loop but being hanged.

void read_notification()
{
	IE=0x00;
	lcdcmd(0x01);
	lcdcmd(0xd4);
lcddata('Z');
delay(50);
	clear();

	SMSString("AT+CMGR=");
        tx0(MyBuff[12]);
        SMSString("\r");
        IE=0x90;
        delay(100);
        read_text(msg1,rec_no,time_date);
		clear();
// clear MyBuff[] so that next index no can be stored. 
		clear_mybuff();

}
SMSString( "AT+CNMI=2,1,0,0,0\r"); // notification of new sms
while(1)
{
IE=0x90;
k=0;
lcdcmd(0xd4);
lcddata('R');
delay(100);
while(!NewMessage);
{
lcdcmd(0xd4);
lcddata('I');
delay(10);
NewMessage = 0;
read_notification();
IE=0x90;
}
//New msg indication.
// +CMTI: "SM",3

}

void clear_mybuff()
{
	unsigned int a;
	for(a=0;a<=15;a++)
		MyBuff[a]=0x00;
}

its entering into the loop but being hanged.

in which loop it enter and hang
may be there is memory overlapping try to increase buffer size to 20 or 25 bytes

Hi mojaka,

When 2nd msg arrives its entering in read notification() clears the screen and displays 'Z' and then its being hanged.

well there is no need to disable interrupts, it can cause problems later on.

void tx0(unsigned char x) //send data to serial port 0
{
        SBUF=x;
        while(!TI_flag);
        TI_flag=0;
}

And you should not use tx0 function inside interrupt.

hi kirangowle
debug it with keil
connect modem to serial port in Proteus send data to serial port and see fee back on proteus
also use pproteus vsm plug in with keil it will easily catch the error point
in read_notification() function write a character to lcd after each line so we detect a point where its get stuck

lcddata('Z');
delay(50);
lcddata('A');
clear();
lcddata('B');
SMSString("AT+CMGR=");
lcddata('C');

What is that proteus vsm plugin.

hi kirangowle
download from here
1) http://ifile.it/bascgtf
or
2) http://ifile.it/bascgtf/debugger.zip
install it after hat it will merge into keil
see the last option it is Proteus vsm simulator
it will come when u install the above software

After this i have to debug in proteus or in keil itself guide me to proteus?.

hi kirangowle
go through these links
http://www.labcenter.com/support/vdmkeil.cfm
http://www.labcenter.com/support/vdmavr.cfm

at first u need to enable from Proteus debug-> use debug monitor
from keil use it as u see in above screen shoot

steps:
1.In Keil options select proteus VSM monitor under debug tab.
2. Build the project in Keil. Select to generate hex file also.
3. In Proteus, under properties (ctrl+E over the part) of 8051 point to the above hex file as program file.
4. Start the simulation with remote debug monitor selected.
5. Start debugging from keil.


if u get this message " the target DLL has been cancelled. the debugger is stopped"
then do these steps
1. download vdmadi.exe from Labcenter and install.
2. download this cracked prospice.dll and replace the original one.
3. check debug-use remote debug monitor in Proteus.
4. Config keil51, debug-Proteus monitor 51 driver - setting - ip 127.0.0.1 for debug on same computer. Port 8000.