1602b_lcd_test.c

用1602LCD液晶屏做的电子表。

#include <iom8v.h>
#include <macros.h>
#include <math.h>
#include "1602LCD.h"
const unsigned char table[]="0123456789";
const unsigned char love[]="I Love U,MeiMei!";
unsigned char h=0x0A,m=0x28,s=0x20,temp1;
unsigned char ch,ch1=0; 

//TIMER1 initialize - prescale:1024
// WGM: 0) Normal, TOP=0xFFFF
// desired value: 1Hz
// actual value:  1.000Hz (0.0%)
void timer1_init(void)
{
 TCCR1B = 0x00; //stop
 TCNT1H = 0xF0; //setup
 TCNT1L = 0xBE;
 OCR1AH = 0x0F;
 OCR1AL = 0x42;
 OCR1BH = 0x0F;
 OCR1BL = 0x42;
 ICR1H  = 0x0F;
 ICR1L  = 0x42;
 TCCR1A = 0x00;
 TCCR1B = 0x04; //start Timer
}

#pragma interrupt_handler timer1_ovf_isr:9
void timer1_ovf_isr(void)
{
//TIMER1 has overflowed
 TCNT1H = 0xF0; //reload counter high value
 TCNT1L = 0xBE; //reload counter low value
    s++;
         if(s>0x3B)
		   {s=0x0;
		    m++;}
		   if(m>0x3B)
		     {m=0x0;
		      h++;}
			  if(h>0x0C)
		      {h=0x0;}
			  
      write_s(s);
	  write_m(m);
	  write_h(h);
	  LCD_set_xy(ch,1);
	  LCD_write_char(0,love[ch1]);
	  ch++;
	  ch1++;
	  if(ch>15)
	  {ch=ch-16;	  
	  }
	  if(ch1>16)
	  {ch1=0;
	  ch=0;
	  LCD_write_string(0,1,"                ");}
}
void write_h(unsigned char h)
{		   unsigned char temp=0;
		   LCD_set_xy(0,0);
		   temp=h/10;
		   LCD_write_char(0,table[temp]);
		   temp=h%10;
		   LCD_write_char(0,table[temp]);
		   LCD_write_char(0,':');
}

void write_m(unsigned char m)
{		   unsigned char temp=0;
		   LCD_set_xy(3,0);
		   temp=m/10;
		   LCD_write_char(0,table[temp]);
		   temp=m%10;
		   LCD_write_char(0,table[temp]);
		   LCD_write_char(0,':');
}

void write_s(unsigned char s)
{		   unsigned char temp=0;
           LCD_set_xy(6,0);
		   temp=s/10;
		   LCD_write_char(0,table[temp]);
		   temp=s%10;
		   LCD_write_char(0,table[temp]);
}

void main(void)
  {     unsigned char i=0b000001; 

     OSCCAL=0XBA;

	 DDRD |= LCD_DATA | LCD_RW;
     DDRC |= LCD_RS   | LCD_EN;
     
     LCD_init();
	 LCD_write_char(0x01,0); 
 //stop errant interrupts until set up
 CLI(); //disable all interrupts
 timer1_init();

 MCUCR = 0x00;
 GICR  = 0x00;
 TIMSK = 0x04; //timer interrupt sources
 SEI(); //re-enable interrupts
 //all peripherals are now initialized
 		   LCD_set_xy(3,0);

		   LCD_set_xy(6,0);
		   LCD_write_char(0,':');
     
     while(1)
     { ;}   
}