ARM LPC 2148 Embedded 'C' CODES-II

PROGRAM 1:

PROGRAM TO INTERFACE REAL TIME CLOCK WITH LCD

#include <lpc21xx.h>

#include <stdio.h>

void LCD(unsigned char);

void cmd(unsigned int);

void data(unsigned int);

char arr1[10];

unsigned char l,m,n;

void rtc(void)

{

PREINT=0X5A;

PREFRAC=0XC6C0;

CCR=0X00;

SEC=0X00;

MIN=0X24;

HOUR=0X03;

CCR=0X01;

}

void serial()

{

   PINSEL0=0X0000005;         //select TXD0 and RXD0 lines                                            IODIR1 = 0X00ff0000;                   //define as o/p lines

   U0LCR  = 0X00000083;                  //enable baud rate divisor loading and

  U0DLM = 0X00;                              //select the data format

   U0DLL = 0x13;                               //select baud rate 9600 bps

   U0LCR  = 0X00000003;

 }

void delay(void)

{

int i;

for (i=0;i<200000;i++);

}

unsigned int i,x,y,z;

void LCD(unsigned char msg)

{

  unsigned int c[] = {0x20,0x80,0x30,0x38,0x0c,0x01};

  unsigned int i;

  IODIR0 = 0x000000FC;

  for(i=0;i<7;i++)

  {

   cmd(c[i]);

   delay();

  }

                   

    cmd (0x80);

          delay();

          data(msg);

          delay();

          cmd(0x01);

 }

void cmd(unsigned int x)

{

  unsigned int value;

  value = x;

  value = value & 0xF0;

  IOCLR0 = 0xF0;

  IOCLR0 = 0x04; //Rs is reset. Enters command mode.

  IOSET0 = value;

  IOSET0 = 0x08; //Enable is set.

  delay();

  IOCLR0 = 0x08; //Enable is reset.

  value = x;

  value = value & 0x0F;

  value = value << 4;

  IOCLR0 = 0xF0;

  IOCLR0 = 0x04; //Rs is reset. Enters command mode.

  IOSET0 = value;

  IOSET0 = 0x08; //Enable is set.

  delay();

  IOCLR0 = 0x08; //Enable is reset.

}

void data(unsigned int p)

{

  unsigned int value;

  value = p;

  value = value & 0xF0;

  IOCLR0 = 0xF0;

  IOSET0 = 0x04; //Rs is set. Enters write mode.

  IOSET0 = value;

  IOSET0 = 0x08; //Enable is set.

  delay();

  IOCLR0 = 0x08; //Enable is reset.

  value = p;

  value = value & 0x0F;

  value = value << 4;

  IOCLR0 = 0xF0;

  IOSET0 = 0x04; //Rs is set. Enters write mode.

  IOSET0 = value;

  IOSET0 = 0x08; //Enable is set.

  delay();

  IOCLR0 = 0x08; //Enable is reset.

}

int main()

{

serial();

          rtc();

          while(1)

          {

          i=0;

                   x=SEC;

             sprintf(arr1,"sec:%d",x);

          while (arr1[i] != '\0')

          {       

                    while (!(U0LSR & 0x20));

                    U0THR = arr1[i];

          }

           

             { while (!(U0LSR & 0x01));

                   U0RBR = U0THR;

                   l=U0RBR;

                   LCD(l);

                   i++;

             }

         

          delay();        delay();        delay();

          y=MIN;

          i=0;

                    sprintf(arr1,"min:%d",y);

          while (arr1[i] != '\0')

          {

                    while (!(U0LSR & 0x20));

                    U0THR = arr1[i];

                   i++;

          }

           {

              while (!(U0LSR & 0x01));

                   U0RBR = U0THR;

                   m=U0RBR;

                   LCD(m);

                   i++;

            }

          U0THR='\n';

          i=0;

                             delay();

                              z=HOUR;

                             sprintf(arr1,"hour:%d",z);

          while (arr1[i] != '\0')

          {

                    while (!(U0LSR & 0x20));

                    U0THR = arr1[i];

                   i++;

          }

            {

              while (!(U0LSR & 0x01));

                   U0RBR = U0THR;

                   n=U0RBR;

                   LCD(n);

                   i++;

             }

          U0THR='\n';

          i=0;

            delay();

    }

}

PROGRAM 2:

PROGRAM TO INTERFACE REAL TIME CLOCK WITH UART

#include <lpc21xx.h>

#include <stdio.h>

 char arr1[10];

void rtc(void)

{

PREINT=0X5A;

PREFRAC=0XC6C0;

CCR=0X00;

SEC=0X00;

MIN=0X24;

HOUR=0X03;

CCR=0X01;

}

   void serial()

   {

      PINSEL0=0X0000005;                 

       IODIR1 = 0X00ff0000;       

      U0LCR  = 0X00000083;              

       U0DLM = 0X00;

        U0DLL = 0x13;               

        U0LCR  = 0X00000003;

                   }

void delay(void)

{

int i;

for (i=0;i<200000;i++);

}

unsigned int i,x,y,z;

int main()

{

serial();

          rtc();

          while(1)

          {

          i=0;

                   x=SEC;

             sprintf(arr1,"sec:%d",x);

          while (arr1[i] != '\0')

          {       

                    while (!(U0LSR & 0x20));

                    U0THR = arr1[i];

                   i++;

          }

          delay();        delay();        delay();

          y=MIN;

          i=0;

                    sprintf(arr1,"min:%d",y);

          while (arr1[i] != '\0')

          {

                    while (!(U0LSR & 0x20));

                    U0THR = arr1[i];

                   i++;

          }

          U0THR='\n';

          i=0;

                             delay();

                              z=HOUR;

                             sprintf(arr1,"hour:%d",z);

          while (arr1[i] != '\0')

          {

                    while (!(U0LSR & 0x20));

                    U0THR = arr1[i];

                   i++;

}

          U0THR='\n';

          i=0;

            delay();

  }

}

PROGRAM 3:

PROGRAM TO IMPLEMENT REAL TIME CLOCK AS ALARM

#include<LPC21XX.h>

#include<stdio.h>

char arr1[20];

void delay(void)

{

int i;

for(i=0;i<200000;i++);

}

 void start_ALARM_ISR (void) __irq

{

PINSEL0=0X00000000;

IODIR0=0X00FF0200;

IOSET0=0X00FF0200;

//IOCLR0=0X00000200;

if(ILR==0x02)

ILR=0X02;

VICVectAddr=0;

          }

void rtc(void)

{

PREINT=0X5A;

PREFRAC=0X46C0;

CCR=0X00;

SEC=0X00;

MIN=0X00;

HOUR=0X03;

CCR=0X01;

}

void serial()

{

PINSEL0=0X00000005;

U0LCR=0X00000083;

U0DLM=0X00;

U0DLL=0X61;

U0LCR=0X00000003;

}

unsigned int i,x,y,z;

int main()

{

IODIR0=0X00000200;

serial();

rtc();

AMR = 0xFE;

ALSEC=0XA;

VICVectAddr0  = (unsigned long int) &start_ALARM_ISR;

VICVectCntl0  = 0x20 | 13;              // Interrupt priority

VICIntEnable = 0X00002000;

while(1)

{

i=0;

x=SEC;

sprintf(arr1,"SEC:%d\n",x);

while(arr1[i]!='\0')

{

while(!(U0LSR & 0X20));

U0THR=arr1[i];

i++;

}

U0THR=arr1[i];

i=0;

 y=MIN;

sprintf(arr1,"MIN:%d\n",y);

while(arr1[i]!='\0')

{

           while(!(U0LSR & 0X20));

U0THR=arr1[i];

i++;

}

i=0;

delay();

z=HOUR;

sprintf(arr1,"hour:%d",z);

while(arr1[i]!='\0')

{

           while(!(U0LSR & 0X20));

U0THR=arr1[i];

i++;

}

i=0;

}

}