GPS with AT89C51

[WWSIERT]

I am feeding the GPS signal into a 8051 microcontroller via GT-7U GPS.
My code does not detect the header $GPRMC, the image below shows some
of the characters I m receiving. The received chars don't seem valid
and I don't know what I should change to correct this......


void receive_data() interrupt 4
{
info[check++]=SBUF; //Read SBUF
lcd_data(info[check-1]);
if(check<7) //Condition to check the required data
{
if(info[check-1]!=test[check-1])
check=0;
}

RI=0;
}

void serial()
{
EA=1;
ES=1;
SCON=0x50 ; // SERIAL MODE 1 ,8- BIT DATA ,1 STOP BIT ,1 START BIT
, RECEIVING ON
TMOD=0x20; //MODE=2
TH1=0xFD; // 9600 BAUD

TR1=1; //TIMER START

//IE=0x90; // enable interrupts...
}
void lcd_data(unsigned char item)
{
port2 = item;
rs= 1;
rw=0;
e=1;
delay(50);
e=0;
return;
}

[jovana.medakovic]

Hello,

The GPS module returns data in the form of NMEA responses.

On our GitHub, you can find some of our GPS examples, so there you can see on which way you can get a message.
https://github.com/MikroElektronika/GPS_click/
If you open driver.c, you can find function gps_parser, so maybe it will help you.

Unfortunately, we don't have GT-7U GPS, so I cannot test it.

Kind regards,
Jovana