cymometer.c

PIC单片机C语言程序设计实例精粹

#include "cymometer.h"

void init()
{
	init_timer();
	init_capture();
	init_lcd();
	pulse_count = 2; 	//两个脉冲
}

void init_timer()
{
	OPTION=0b00000111 ; 
	TMR0=156;    				//设置100次机器周期溢出
	INTCON =0b10100000 ; 		// 使能定时器中断
	TRISD=0;    
}

void interrupt ISR(void)
{
	…        //保护现场、屏蔽中断（根据实际工程修改）
		if(time_out>0)
			time_out--;
		time_count++;
		if((INTCON&0b00000100)!=0)
		{	
			INTCON=INTCON&0b11111011; 
			TMR0=0;
			PORTD++; }	
}
…      //恢复现场、使能中断（根据实际工程修改）
}

void pulse_1khz()
{
	if(time_count_output >= 5)
	{
		if(state.state_ouput == 0)
		{
			PORTB |= 0x1;
			state.state_ouput = 1;
		}
		else
		{
			PORTB &= 0xfe;
			state.state_ouput = 1;
		}
		time_count_output = 0;
	}
	
}

void lcd_busy(void)
{ 
	PORTD=0xff; 
   	nRS_1604; 
	rw_1604; 
   	CS_1604;
   	while((PORTD&0x80)==0x80);
   	nCS_1604;
}

void lcd_cmd(unsigned char cmd)
{  
	lcd_busy();
	nRS_1604; 
   	nRW_1604; 
	PORTD = cmd;
   	CS_1604;
   	delayMs();
   	nCS_1604; 
}

void lcd_data(unsigned char data)
{  
	lcd_busy();
	RS_1604; 
   	nRW_1604; 
   	PORTD = data; 
   	CS_1604;
   	delayMs();
	nCS_1604; 
}

void lcd_init()
{  
	delayMs();
   	lcd_cmd (0x38);
   	lcd_cmd(0x08);
   	lcd_cmd (0x01);
   	lcd_cmd (0x06);
   	lcd_cmd (0x0c);
}

void lcd_xy(void)
{  
	X&=0x0f; 
   	Y&=0x03;
   	if(Y==0x00)
		lcd_cmd(X|0x80);
   	else if(Y==0x01)
		lcd_cmd ((X+0x40)|0x80);
   	else if(Y==0x02)
		lcd_cmd ((X+0x10)|0x80);
   	else
		lcd_cmd ((X+0x50)|0x80);
}

void lcd_show(unsigned char xx,unsigned char yy,unsigned char *string)
{  
	Y=yy;
	for(X=xx;X<16;X++)
	{  
		lcd_xy();
		lcd_data(*s);
		string++;
		delayMs();
	}
}


void main()
{
	init();
	while(1)
	{
		if(counter_stop == 1)
		{
			counter_read();
			counter_stop=0
		}
		lcd_refresh();
	}
}