File content as of revision 0:e791ad8b9e26:

#include "mbed.h"
#include "string.h"

Serial pc(SERIAL_TX, SERIAL_RX);
Serial sim808(D1,D0);
DigitalOut myled(LED1);

#define buf_max 200
int First_Int = 0;
char sim_buf[buf_max];
char *phone="\"17865578811\"";//¶ÌÐŽÓÊÕ·½ÊÖ»úºÅ
char *content="HELLO ~";//·¢ËͶÌÐÅÄÚÈÝ
char CtrlZ = 0x1A;
char temp[50]="AT+CMGS=";

void SIM808_IRQHandler(void);
void CLR_Buf(void);
void Wait_CREG(void);

//void getline();

void SIM808_IRQHandler(void)                    
{    
      sim_buf[First_Int] = sim808.getc();
            First_Int++; 
} 

//void callback()
//{       
//  getline();
//}

int main()
{
    pc.baud(115200);
    sim808.baud(115200);
    
    sim808.attach(&SIM808_IRQHandler,SerialBase::RxIrq);
    
    pc.printf("Send Message Test!");
    wait(1);
    
    sim808.printf("AT");
    sim808.printf("\r\n");
    wait(1);
    pc.printf("%s",sim_buf);
    CLR_Buf(); 

    Wait_CREG();
    pc.printf("Register Succeed! ");
    
    sim808.printf("AT+CMGF=1");
    sim808.printf("\r\n");
    wait(1);
    pc.printf("%s",sim_buf);
    CLR_Buf();

    sim808.printf("AT+CSCS=\"GSM\"");
    sim808.printf("\r\n");
    wait(1);
    pc.printf("%s",sim_buf);
    CLR_Buf();

    sim808.printf("AT+CSMP=17,167,240");
    sim808.printf("\r\n");
    wait(1);
    pc.printf("%s",sim_buf);
    CLR_Buf();

    strcat(temp,(char*)phone);
    sim808.printf("%s",temp);
    sim808.printf("\r\n");
    wait(1);
    pc.printf("%s",sim_buf);
    CLR_Buf();
    
    sim808.printf("%s",(char*)content);
    sim808.printf("%c",CtrlZ);
    pc.printf("%s",sim_buf);
    CLR_Buf();
        
    while(1);
}


//void getline() 
//{
//  pc.putc(sim808.getc());
//}


void CLR_Buf(void)
{
    uint16_t k;
    for(k=0;k<buf_max;k++)      //½«»º´æÄÚÈÝÇåÁã
    {
        sim_buf[k] = 0x00;
    }
    First_Int = 0;              //½ÓÊÕ×Ö·û´®µÄÆðʼ´æ´¢Î»ÖÃ
}

//u8 Find(char *a)
//{ 
//  if(strstr(sim_buf,a)!=NULL)
//      return 1;
//  else
//          return 0;
//}

void Wait_CREG(void)
{
    int i;
    int k;
    i = 0;
    CLR_Buf();
  while(i == 0)                 
    {
        CLR_Buf();        
        sim808.printf("AT+CREG?");
        sim808.printf("\r\n");
        wait(1);        
        pc.printf("%s\r\n",sim_buf);
        for(k=0;k<buf_max;k++)                  
        {
            if(sim_buf[k] == ':')
            {
                if((sim_buf[k+4] == '1')||(sim_buf[k+4] == '5'))
                {
                    i = 1;
                  break;
                }
            }
        }
        pc.printf("CREGING.....\r\n");
    }
}