USB INTERFACE WITH LPC2148

I used serial communication with the help of UART & DB9 connector.
& I am new to this field so I don't know about USB interfacing.

here is my code for finger-print access system project.

#include<lpc214x.h>
#include "lcd.h" //LCD INIT.,DATA & CMD
#include "lcd_print.h" //WEL-COME SCREEN & MAIN MENU
#include "baudrate.h" //FOR BAUDRATE SETTING
#include "enroll.h" //ENROLL FUNCTION
#include "diag.h" //DIAGNOSE FUNCTION
#include "add_user.h"
#include "identify.h"
#include "deletealluser.h"
#include "rtc.h"
#include "sms_send.h"
#include "gsm.h"

void serial_init()
{ U0LCR = 0x80; //UART0 CONFIG. U0DLL = 0x61; U0DLM = 0x00; U0LCR = 0x03;

U1LCR = 0x80; //UART1 CONFIG. U1DLL = 0x61; U1DLM = 0x00; U1LCR = 0x03;
}

void DIAGNOSE_ISR()
{ lcd_clr(); diagnose();
}

void ENROLL_ISR()
{ lcd_clr(); enrollfunc(); //CALL FOR ENROLL FUNCTION
}

void IDENTIFY_ISR()
{ lcd_clr(); identify();
}

void DELETE_ISR()
{ lcd_clr(); delete();
}

int main()
{ unsigned int a,b,c,d,e;

PINSEL0 = 0x00050005; // UART0 , UART1 PINSEL1 = 0x00000000; IO1DIR = 0x0BFF0000; // 0 0 0 0 1 0 1 1 1 1 1 1 1 1 1 1 0 0 0 0 .... VPBDIV = 0x00;

lcd_print();

serial_init();

RTC_Init (); RTC_SetTime (23,59,45); RTC_SetDate (31,12,2011);

// baudrate();

lcd_print();

/* EXTMODE = 0x00; EXTPOLAR = 0x00; VICIntSelect = 0x0000; VICIntEnable = 0x03C000; VICVectCntl0 = 0x2E; VICVectAddr0 = (unsigned long) DIAGNOSE_ISR; //DIAGNOSE INTRRUPT ROUTINE VICVectCntl1 = 0x2F; VICVectAddr1 = (unsigned long) ENROLL_ISR; //ENROLL INTERRUPTS ROUTINE VICVectCntl2 = 0x30; VICVectAddr2 = (unsigned long) IDENTIFY_ISR; //IDENTIFY INTERRUPTS ROUTINE

while(1);
*/

while(1) { e = IO1PIN & 0x08000000; //admin mode if(e == 0x0000000) { lcd_data4(); delay_ms(5000); adminpass(); if(flag1 == 0x01) break;

while(1) { lcd_data3();
//========== Diagnose section ================== a = IO0PIN & 0x00010000; if(a == 0x0000000) { DIAGNOSE_ISR(); while((IO0PIN & 0x00010000) == 0x00000000); }
//========== Enroll Section ==================== b = IO0PIN & 0x00000008; if(b == 0x00000000) { ENROLL_ISR(); while((IO0PIN & 0x00000008) == 0x00000000); }
//========== Identify Section ================= c = IO0PIN & 0x00000080; if(c == 0x0000000) { IDENTIFY_ISR(); while((IO0PIN & 0x00000080) == 0x00000000); }
//========== Delete section ===================== d = IO0PIN & 0x00100000; if(d == 0x0000000) { DELETE_ISR(); while((IO0PIN & 0x00100000) == 0x00000000); } } }

e = IO1PIN & 0x08000000; if(e == 0x08000000) //user mode { lcd_data5(); delay_ms(5000); lcd_clr(); delay_ms(1000);

while(1) { lcd_data6();
//========== Diagnose section ================== a = IO0PIN & 0x00010000; if(a == 0x0000000) { DIAGNOSE_ISR(); while((IO0PIN & 0x00010000) == 0x00000000); }
//========== Identify Section ================= c = IO0PIN & 0x00000008; if(c == 0x0000000) { IDENTIFY_ISR(); while((IO0PIN & 0x00000008) == 0x00000000); } } } }
}

I used serial communication with the help of UART & DB9 connector.
& I am new to this field so I don't know about USB interfacing.

here is my code for finger-print access system project.

#include<lpc214x.h>
#include "lcd.h" //LCD INIT.,DATA & CMD
#include "lcd_print.h" //WEL-COME SCREEN & MAIN MENU
#include "baudrate.h" //FOR BAUDRATE SETTING
#include "enroll.h" //ENROLL FUNCTION
#include "diag.h" //DIAGNOSE FUNCTION
#include "add_user.h"
#include "identify.h"
#include "deletealluser.h"
#include "rtc.h"
#include "sms_send.h"
#include "gsm.h"

void serial_init()
{ U0LCR = 0x80; //UART0 CONFIG. U0DLL = 0x61; U0DLM = 0x00; U0LCR = 0x03;

U1LCR = 0x80; //UART1 CONFIG. U1DLL = 0x61; U1DLM = 0x00; U1LCR = 0x03;
}

void DIAGNOSE_ISR()
{ lcd_clr(); diagnose();
}

void ENROLL_ISR()
{ lcd_clr(); enrollfunc(); //CALL FOR ENROLL FUNCTION
}

void IDENTIFY_ISR()
{ lcd_clr(); identify();
}

void DELETE_ISR()
{ lcd_clr(); delete();
}

int main()
{ unsigned int a,b,c,d,e;

PINSEL0 = 0x00050005; // UART0 , UART1 PINSEL1 = 0x00000000; IO1DIR = 0x0BFF0000; // 0 0 0 0 1 0 1 1 1 1 1 1 1 1 1 1 0 0 0 0 .... VPBDIV = 0x00;

lcd_print();

serial_init();

RTC_Init (); RTC_SetTime (23,59,45); RTC_SetDate (31,12,2011);

// baudrate();

lcd_print();

/* EXTMODE = 0x00; EXTPOLAR = 0x00; VICIntSelect = 0x0000; VICIntEnable = 0x03C000; VICVectCntl0 = 0x2E; VICVectAddr0 = (unsigned long) DIAGNOSE_ISR; //DIAGNOSE INTRRUPT ROUTINE VICVectCntl1 = 0x2F; VICVectAddr1 = (unsigned long) ENROLL_ISR; //ENROLL INTERRUPTS ROUTINE VICVectCntl2 = 0x30; VICVectAddr2 = (unsigned long) IDENTIFY_ISR; //IDENTIFY INTERRUPTS ROUTINE

while(1);
*/

while(1) { e = IO1PIN & 0x08000000; //admin mode if(e == 0x0000000) { lcd_data4(); delay_ms(5000); adminpass(); if(flag1 == 0x01) break;

while(1) { lcd_data3();
//========== Diagnose section ================== a = IO0PIN & 0x00010000; if(a == 0x0000000) { DIAGNOSE_ISR(); while((IO0PIN & 0x00010000) == 0x00000000); }
//========== Enroll Section ==================== b = IO0PIN & 0x00000008; if(b == 0x00000000) { ENROLL_ISR(); while((IO0PIN & 0x00000008) == 0x00000000); }
//========== Identify Section ================= c = IO0PIN & 0x00000080; if(c == 0x0000000) { IDENTIFY_ISR(); while((IO0PIN & 0x00000080) == 0x00000000); }
//========== Delete section ===================== d = IO0PIN & 0x00100000; if(d == 0x0000000) { DELETE_ISR(); while((IO0PIN & 0x00100000) == 0x00000000); } } }

e = IO1PIN & 0x08000000; if(e == 0x08000000) //user mode { lcd_data5(); delay_ms(5000); lcd_clr(); delay_ms(1000);

while(1) { lcd_data6();
//========== Diagnose section ================== a = IO0PIN & 0x00010000; if(a == 0x0000000) { DIAGNOSE_ISR(); while((IO0PIN & 0x00010000) == 0x00000000); }
//========== Identify Section ================= c = IO0PIN & 0x00000008; if(c == 0x0000000) { IDENTIFY_ISR(); while((IO0PIN & 0x00000008) == 0x00000000); } } } }
}