arm coding need

i'm doing project in arm. i dont know how to convert microcontroller coding to arm 7lpc 2148.here the source code for how to send sms via gsm through arm to mobile<\b>.

#include<at89x51.h> // include at89x51 . h
#include<stdio.h>// include stdio . h
#include<stdlib.h>// include stdlib . h
void initialize_GSM_modem(void);
void initialize_serialcommunication(void);
unsigned char Command_CMGF[]="AT+CMGF=1\r";
// AT+CMGF for selecting Text Mode
unsigned char CtrlZ=0x1A;
// CTRL+Z for sedning SMS after the message has been entered
unsigned char Command_CMGS[]="AT+CMGS =+9233385xxxxx\r";
// recepient mobile number
unsigned char Command_AT[]="AT\r";
unsigned char msg02[]="Hello!";
void delay(void){
unsigned int i;
for(i=0;i<50;i++);
}
void delay2(void){
unsigned int i;
for(i=0;i<25000;i++);
}
void main (void) {
initialize_GSM_modem();
initialize_serialcommunication();
while (1) {
;
}
}
void initialize_GSM_modem(void){
delay2();
puts(Command_AT);
delay2();
puts(Command_CMGF);
delay2();
puts(Command_CMGS);
delay2();
puts(msg02);
delay2();
while(!TI); TI = 0;SBUF = 0x1A;
}
void initialize_serialcommunication(void){
TMOD = 0x20;
SCON = 0x50;
TH1  = 0xFD;
TL1  = 0xFD;
TR1  = 1;
TI = 1;
}
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