Interfacing pic 16f688 with TELIT gprs modem

[khamar_98495]

Hi,

I am interfacing pic 16f688 with TELIT gprs modem.
When i send AT command to GPRS modem, i was able to receive "OK" in hyper terminal.

similarly if i send AT command to GPRS modem from pic, it is responding with "OK". I was not able to store this OK in micro controller.
This OK is coming till receiver pin of micro controller but not able to store in a buffer.

Please help me.

Thanks in advance

 

[wp100]

Hi,

Why cannot you store the data 'OK' ??

Post your program source code so we can see what you are trying to do.

 

[khamar_98495]

Hi wp100,

Here i am attaching the code, Please do the needfull.

#include "htc.h"
#include "Pic.h"
#include "pic16f688.h"

__CONFIG(FCMDIS & IESODIS & CPD & MCLREN & WDTDIS & INTIO & PWRTEN & INTCLK & BOREN);

unsigned char receive_byte; //variable to store byte from RCREG
unsigned char receive_array[10]; //Array to store the response
unsigned int long d;

void OscillatorConfiguration(void) //Oscillator initialise
{
OSCCON = 0x71;
}

void UartInit(void) //uart initialise
{

//BRG16 = 0; // tO DO
SPBRG = 12;
BRGH = 0; //data rate for sending
SYNC = 0; //asynchronous
SPEN = 1; //enable serial port pins
CREN = 1; //enable reception
SREN = 0; //no effect
TXIE = 0; //disable tx interrupts
RCIE = 0; //disable rx interrupts
TX9 = 0; //8-bit transmission
RX9 = 0; //8-bit reception
TXEN = 0; //reset transmitter
TXEN = 1; //enable the transmitter
}

void UartTxChar(unsigned char ch) //function to transmit character
{
//CLRWDT();
while(!TXIF);
TXREG = ch;
}

void UartTxString(unsigned char *str) //function to transmit string
{
while(*str != '\0')
UartTxChar(*str++);
UartTxChar(13);

}

void serial_receive() //function to take the value from RCREG
{
while((RCIF == 0) && (d != 50000))
{
d++;
}

if(RCIF)
{
receive_byte = RCREG;
RCIF = 0;
}
else
{
receive_byte = 'A';
}


}

void receive() //function to store the received vale in array
{
unsigned char i;

d = 0;
for( i = 0; i < 9; i++)
{
serial_receive();

receive_array = receive_byte;
}

}

void main(void)
{
OscillatorConfiguration();
UartInit();
UartTxString((unsigned char*)"AT");

receive();

UartTxString(receive_array);
while(1);
}


Thank you in advance

 

[khamar_98495]

Hi,


Please help me out.........