PIC32 to M95 GSM interface

[Nirali]

Hello,

 

I am designing a new project but I didn't get an idea for PIC32 program to interface with GSM module. In M95 GSM unit is there require any external cammands?

Please help me for program.

 

[nilesh]

Hi,

        Which PIC32 you are using?In general GSM module work on AT commands.For the interfacing of the GSM and PIC microcontroller you need to write UART receive Interrupt code.

sample here

void UART1Handler (void) __irq 

{

char TEMP = 0;

  TEMP = U1IIR;

  

if(TEMP & 0x04)

{

while(U1LSR & 0x01)

{

TEMP = U1RBR;

Buffer[Count] = TEMP;

Count++;

if ( Count >= BUFSIZE ) Count = 0;

}

}

  

MSSG[6] = MSSG[5];

MSSG[5] = MSSG[4];

MSSG[4] =MSSG[3];

MSSG[3] = MSSG[2];

MSSG[2] = MSSG[1];

MSSG[1] = MSSG[0];

MSSG[0] = TEMP;

if(TEMP == '>')GTR = 1;

if((MSSG[1] == 'O') && (MSSG[0] == 'K')) I_OK = 1; 

if((MSSG[1] == 'I') && (MSSG[0] == 'P')) I_IP = 1; 

if((MSSG[4] == 'E') && (MSSG[3] == 'R')&& (MSSG[2] == 'R')&& (MSSG[1] == 'O')&& (MSSG[0] == 'R')) ERR = 1; 

if((MSSG[6] == 'C') && (MSSG[5] == 'O')&& (MSSG[4] == 'N')&& (MSSG[3] == 'N')&& (MSSG[2] == 'E')&& (MSSG[1] == 'C')&& (MSSG[0] == 'T')) CNT = 1; 

if((MSSG[5] == '2')&& (MSSG[4] == '0')&& (MSSG[3] == '0')&& (MSSG[2] == ' ')&& (MSSG[1] == 'O')&& (MSSG[0] == 'K')) S_200 = 1; 

if((MSSG[5] == 'W')&& (MSSG[4] == '!')&& (MSSG[3] == 'B')&& (MSSG[2] == '@')&& (MSSG[1] == 'E')&& (MSSG[0] == '#')) flag = 1; 

if((MSSG[5] == 'A')&& (MSSG[4] == 'R')&& (MSSG[3] == 'R')&& (MSSG[2] == 'I')&& (MSSG[1] == 'E')&& (MSSG[0] == 'R')) NCRR = 1;

if((MSSG[3] == 'R')&& (MSSG[2] == 'I')&& (MSSG[1] == 'N')&& (MSSG[0] == 'G')) Ring = 1;

if((MSSG[3] == '+')&& (MSSG[2] == 'C')&& (MSSG[1] == 'M')&& (MSSG[0] == 'T'))

{  

smsrcv = 1;

Count = 0;

}

 

  VICVectAddr = 0;

}

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