RTC PROGRAM FOR ARM7LPC2129

                    RTC PROGRAM FOR ARM7LPC2129               


PROGRAM FOR DISPLAYING CLOCK TIME?      


#include<lpc21xx.h>
#define RS (1<<10)
#define RW (1<<12)
#define EN (1<<13)
#define DATA_PINS (0xff<<15)
     
 void lcdcmd(int cmd);
 void lcddata(char data);
 void lcdstring(char *str);
void lcdstring1(char *str1);
void lcd_num(int num);
void delay(int count);
void lcdinit(void);
void delay(int count)
{
 int i,j;
 for(i=0;i<count;i++)
 {
  for(j=0;j<5000;j++)
  {
  }
 }
}
void lcdcmd(int cmd)
{
 IOCLR0=RS;
 IOCLR0=RW;
 IOCLR0=(DATA_PINS);
 IOSET0=(cmd<<15);
 IOSET0=EN;
 delay(30);
 IOCLR0=EN;
}                
void lcddata(char data)
{
 IOSET0=RS;
 IOCLR0=RW;
 IOCLR0=(DATA_PINS);
 IOSET0=(data<<15);
 IOSET0=EN;
 delay(30);
 IOCLR0=EN;
}
void lcdstring(char *str)// display 16 char
{
 while(*str)
 {
  lcddata(*str);
  str++;
 }
}

void lcd_num(int num)
{
 if(num)
 {
  lcddata((num%10) +0x30);
  lcd_num(num/10);
 }
}
void lcdinit(void)
{
 IODIR0 |=RS|RW|EN|DATA_PINS;
 lcdcmd(0x38);
 lcdcmd(0x0e);
 lcdcmd(0x01);
 lcdcmd(0x81);
}
void init_rtc()
{
 lcdstring("digital timer");
 CCR=(1<<0);
 //CIIR=(0x01);
 //SEC=(0x00);
 PREINT=456;
 PREFRAC=25024;
 HOUR=12;
 MIN=10;
 SEC=0;
}
int main()
{
 lcdinit();
 init_rtc();
 while(1)
 {
  lcdcmd(0xc0);
  lcddata(HOUR/10+'0');
  lcddata(HOUR%10+'0');
  lcddata(':');
  lcddata(MIN/10+'0');
  lcddata(MIN%10+'0');
  lcddata(':');
  lcddata(SEC/10+'0');
  lcddata(SEC%10+'0');
 }
}

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