LCD interfacing program in C for ARM (LPC 2XXX)

#include<LPC21XX.h>
#define RS (1<<0)
#define RW (1<<1)
#define EN (1<<2)
void display(unsigned char i);
void cmd(unsigned char j);
void lcd_string(unsigned char *p);
void delay(unsigned char k);
int main()
{
     PINSEL0=0x00000000;
IODIR0|=0X00000FFF;
  cmd(0x38);
  cmd(0x01);
  cmd(0x06);
  cmd(0x0E);
  cmd(0x84);
  lcd_string("JAYPEE");
cmd(0xc2);
lcd_string("UNIVERSITY");
  while(1);
  }

 void cmd(unsigned char j)
 {
IOCLR0|=0X00000FFF;
    IOSET0|=(j<<4);
IOCLR0|=RS;
IOCLR0|=RW;
IOSET0|=EN;
delay(100);
IOCLR0|=EN;
}
void lcd_string(unsigned char *p)
{
while(*p!=0)
{

display(*p);
p++;
}
}
void display(unsigned char i)
{
IOCLR0|=0X00000FFF;
IOSET0|=(i<<4);
IOSET0|=RS;
IOCLR0|=RW;
IOSET0|=EN;
delay(100);
IOCLR0|=EN;
}
void delay(unsigned char k)
{
int l,m;
for(l=0;l<k;l++)
{
for(m=0;m<1000;m++);
}
}

LED Blinking program in C for ARM (LPC 2xxx)

#include<lpc21xx.h>
void delay1 (unsigned int);
int main()
{
IO0DIR=(1<<0);
PINSEL0=0x00000000;
while(1)
{
IO0SET=(1<<0);
delay1(1000);
IO0CLR=(1<<0);
delay1(1000);
}
}
void delay1 (unsigned int x)
{
unsigned int i;
for (i=0;i<x; i++);
}

ARM (LPCXXXX) Assembly Program for LED control by taking input from sensor

@;======================================================================

@;      LED ON and OFF Program by taking input from sensor

@;           

@;      Modified by GAURAV VERMA

@;     

@;

@;======================================================================

        AREA PROGRAM, CODE, READONLY

                                ENTRY

PINSEL0 EQU 0xE002C000

PINSEL1 EQU 0xE002C004

IOPIN   EQU 0xE0028000

IODIR   EQU 0xE0028008

IOSET   EQU 0xE0028004

IOCLR   EQU 0xE002800C

                               

                                ldr     r1,=PINSEL0             ; PINSEL0 controls pin 0-15

                                ldr     r2,=0x00000000      ;default GPIO function 00

                                str     r2, [r1]

                                ldr     r1,=IODIR

                                 ldr     r2,=0xFFFFFFFE  ; 0-INPUT 1-OUTPUT 0:31

                                str     r2, [r1]

BACK                     ldr     r0,=IOSET

                                ldr     r1,=0x7BFFFFFF ; SET ALL

                                str     r1, [r0]

                                ldr     r0,=IOPIN

key                          ldr     r3, [r0]

                                CMPS    r3, #0x03FFFFFF ; checking whether switch is pressed or not

                                beq     key

                               

                                ldr     r0,=IOCLR

                                ldr     r2,=0x00000010 ; CLR p0.4

                                str     r2, [r0]

                                BL WAIT

                                BAL BACK

WAIT                     MOV r4, #0x00100000

BACK1                   nop

                                SUBS r4, r4, #1

                                bne     BACK1

                                bx R14

                                           END

ARM PPT

ARM (LPCXXXX) Assembly Program for LED Blinking

@;===========================================================================

@;      LED Blinking program

@;     

@;      Modified by GAURAV VERMA

@;      

@;===========================================================================

AREA PROGRAM, CODE, READONLY

                        ENTRY

                                               

PINSEL0 EQU 0xE002C000

PINSEL1 EQU 0xE002C004

IOPIN   EQU 0xE0028000

IODIR   EQU 0xE0028008

IOSET   EQU 0xE0028004

IOCLR   EQU 0xE002800C

                               

                        ldr     r1,=PINSEL0             ; PINSEL0 controls pin 0-15,@; PINSEL1 controls pin 16-31

                        ldr     r2,=0x00000000    ;default GPIO function 00

                        str     r2, [r1]

                                                               

                        ldr     r1,=IODIR

                        ldr     r2,=0xFFFFFFFF  ; 0-INPUT 1-OUTPUT 0:31 (12 -LED)

                        str     r2, [r1]

                               

                         ; ON LED (GPIO) (GPIO LOW-ON)

BACK              ldr     r0,=IOCLR

                         ldr     r1,=0xFFFFFFFF ; CLR ALL

                         str     r1, [r0]

                         BL WAIT

                               

                       ; OFF LED (GPIO) (GPIO HIGH-OFF)

                          ldr     r0,=IOSET

                          ldr     r1,=0xFFFFFFFF ; SET ALL

                          str     r1, [r0]

                          BL WAIT

                          BAL BACK

WAIT                MOV r4, #0x00100000

BACK1              nop

                           SUBS r4, r4, #1

                            bne  BACK1

                            bx R14

                            END