[Moved] using lpc2148 to interface with SIM300

[hoperain]

we used the code written below to interface SIM300 with LPC2148. we are able to send text messages using hyperterminal. We are even able to see the processor sending the AT commands in the terminal of Flash magic (we are using keil for simulation and flash magic for flashing the code) WE have 9600 as the baudrate. Though the processpr and the SIM300 work individually well when clubbed together we are unable to receive the text.
Can you suggest where we could be going wrong
*the code ?
*Something woth the hardware which we might have overlooked?
(we connect the gsm module to the processor using female to female rs232 connector)

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Code C - [expand]
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#include <LPC21xx.H>
 
char at_command[]="AT\nn", 
                                                       
     mode[]="AT+CMGF=1n",                                 
     msg_test[]="AT+CMGS=?n",                          
     command_phone[]="AT+CMGS=\"12345678\"n",                          
    msg[]="Hellon";     
                             
 
char  out;
char in;
 
void set_uart()
{
PINSEL0= 0X50005;
U0LCR= 0X83;
U0DLL= 97;
U0LCR=0X03;
U0LCR= 0X83;
U0DLL= 97;
U0LCR=0X03;
return;
}
 
void charout()
{
while(!(U0LSR  &  0X020));
U0THR = out;
return;
}
 
void  my_delay()
{
int i;
for(i=0 ; i<10000; i++);
return;
}
 
void main()
 
{
 
int i=0;
set_uart();
 
IODIR1= 0XFF0000;
IOSET1= 0X00000000; 
 
 out=at_command[i++];
 while(!(out=='n'))
           { 
            charout();
            my_delay();
            out=at_command[i++];
            }
 i=0;
  // enter= 0x0d, 0x0a
  out=0x0d;
  charout();
my_delay();
  out=0x0a;
  charout();
my_delay();
 
IOSET1= 0X00FF0000;
// AT+CMGF=1
 
 
 out=mode[i++];
 while(!(out=='n'))
           { 
            charout();
            my_delay();
            out=mode[i++];
            }
 i=0;
 out=0x0d;
  charout();
my_delay();
  out=0x0a;
  charout();
my_delay();
 IOSET1= 0X00000000;
 
 out=msg_test[i++];
 while(!(out=='n'))
           { 
            charout();
            my_delay();
            out=msg_test[i++];
            }
 i=0;
 out=0x0d;
  charout();
my_delay();
  out=0x0a;
  charout();
my_delay();
 
IOSET1= 0X00FF0000;
 out=command_phone[i++];
 while(!(out=='n'))
           { 
            charout();
          my_delay();
            out=command_phone[i++];
            }
 i=0;
 
 out=0x0d;
  charout();
my_delay();
  out=0x0a;
  charout();
my_delay();
   out=msg[i++];
     while(!(out=='n'))
           { 
            charout();
            my_delay();
             out=msg[i++];
            }
    i=0;
out=0x0d;
  charout();
my_delay();
  out=0x0a;
  charout();
my_delay();
        out= 0x1a; // ctrl+z
my_delay();
}

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[Jestin_cubetech]

Re: using lpc2148 to interface with SIM300

AT
delay

ATE0
delay

AT+CMGF=1
delay

-----------------------------------------
 puts("AT+CMGS=\"1234567890\"\n\r");
 puts(" message....\n\r");
 putc(0x1a);
 delay