Need help for sending message from GSM Modem(connecting with PIC16C745)~~~

Hi there,

I'm doing the project of GSM Modem sending message to the cell phone when pressing the push button. The GSM Modem is connected with the PIC16C745. Can anyone tell me how to program correctly to make it work??

RB1 is the push button.
RB2 is the LED.(light up when button is pressed)
RB3 is the buzzer.(sound when button is pressed)

Btw, how to add a delay to my code??

Thxalot!!!

Here is my code.=]

#include <htc.h>
//#include "delay.h"
__CONFIG(WDTDIS&PWRTDIS&UNPROTECT&H4);

void init(void)
{
PORTB=0x02;
TRISB=0x02;
}

void initUSART(void)
{
TXSTA=0x22;
RCSTA=0x90;
SPBRG=0x9b;
}

void enter(void)
{
while(!TRMT);
TXREG=0x0d;
}

void tx_start(void)
{
while(!TRMT);
TXREG=0x1a;
}

void send_msg(const char*str)
{
char ps;
ps=*str;
while(ps>0)
{
str++;
if(ps==0)break;
while(!TRMT);
TXREG=ps;
ps=*str;
}
}

void main(void)
{
init();
initUSART();
while(1)
{
if(RB1==1)
{
RB3=0x01;
RB2=1;
send_msg("at+cmgf=1");
enter();
//Delay_Ms(50);
send_msg("at+cmgs=");
send_msg("+6583011234");
enter();
//Delay_Ms(50);
send_msg("hello");
tx_start();
//Delay_Ms(5000);

RB3=0;
RB2=0;
}
else if(RB1==0)
{
RB3=0;
RB2=0;
}
}
}

help!!!
help help help

If you programed the PIC16C745 I hope you have more you can only program them one time

Here is my updated code, can someone tell me, am i adding the "Delay" code correctly?? Because now i'm still cannot send message to my cell phone via GSM Modem..

Please help me!!! It's very urgent!!!!!

#include <htc.h>

__CONFIG(WDTDIS&PWRTDIS&UNPROTECT&H4);

void Delay(int loop)
{
int i;
for(i=0;i<loop;i++);
}

void init(void)//Assign & Initialize PORTB I/0
{
PORTB=0x02;
TRISB=0x02;
}

void initUSART(void)//Initialize USART
{
TXSTA=0x22;
RCSTA=0x90;
SPBRG=0x9b;
}

void enter(void)//ACSII Keycode for "Enter"
{
while(!TRMT);
TXREG=0x0d;
}

void tx_start(void)//ASCII Keycode for "Ctrl+Z"
{
while(!TRMT);
TXREG=0x1a;
}

void send_msg(const char*str)//Sending String of Characters
{
char ps;
ps=*str;
while(ps>0)
{
str++;
if(ps==0)break;
while(!TRMT);
TXREG=ps;
ps=*str;
}
}

void main(void)
{
init();
initUSART();
while(1)
{
if(RB1==1)
{
RB3=0x01;
RB2=1;
send_msg("at+cmgf=1");
enter();
Delay(500);
send_msg("at+cmgs=");
send_msg("+6591931234");
enter();
Delay(500);
send_msg("hello");
tx_start();
Delay(5000);

RB3=0;
RB2=0;
}
else if(RB1==0)
{
RB3=0;
RB2=0;
}
}
}

Like this you have to define crystal speed