cdisplay.c

实现了led数码管的显示

#include"c8051F320.h"
#define uchar unsigned char
#define sysclk 24000000
#define T2_VAL -(sysclk/12/1000)*1
#define T3_VAL -(sysclk/12/1000)*20

sbit LED_SEL = P1^7;
sbit RING = P3^0;

uchar code seg[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x67};
uchar code dig[]={0x02,0x04,0x08,0x10,0x20,0x01};

uchar data dd,tmr3_done;
uchar data second_count = 50,ring_tmr,second,minute,hour;
uchar data disbuf[6];
uchar bdata disled = 0x80;
sbit LED_RED = disled^6;
sbit LED_green = disled^7;
bit tmr2_done;


void PORT2_Init(void);
void Timer2_Init(void);
void Timer3_Init(void);
void disp_scan(void);
void check_time (void);

uchar da_adjust(uchar da);

void PORT2_Init(void)
{
	XBR1 = 0xc0;
	P3MDOUT |= 0x01;
	P1MDOUT |= 0x80;
	P2MDOUT |= 0xff;
	RING = 0;
}

void Timer2_Init()
{
 	TMR2L = T2_VAL;
 	TMR2H = T2_VAL>>8;//定时器2高字节
 	TMR2RLL = T2_VAL;//定时器2重载寄存器低字节
 	TMR2RLH = T2_VAL>>8;
 	TR2=1;
}

void Timer3_Init()
{
	TMR3L=T3_VAL;
	TMR3H=T3_VAL>>8;
	TMR3RLL=T3_VAL;
	TMR3RLH=T3_VAL>>8;
	TMR3CN=0x04;//TR3=1
}

void disp_scan (void)
{
	TF2H = 0;

	P2 = 0;
	LED_SEL = ~LED_SEL;
	P2 = 0xc0;
	LED_SEL = ~LED_SEL;
	
	P2=seg[disbuf[dd]];
	LED_SEL = ~LED_SEL;
	
	P2 = disled; 
	P2 |= dig[dd];
	LED_SEL = ~LED_SEL;
	
	if(dd==5) dd=0;
	else dd++;  
	tmr2_done =1;  
}

void check_time(void)
{
	TMR3CN &= 0x7f;
	if(second_count != 0) second_count--;
	else
	{
		second_count = 50;
		RING = 1;
		LED_RED = ~LED_RED;
		LED_green = ~LED_green;
		if(second<0x59)
		{
			second++;
			second = da_adjust(second);
			ring_tmr = 5;
		}
		else
		{
			second=0;
			if(minute<0x59)
			{
				minute++;
				minute=da_adjust(minute);
				ring_tmr = 25;
			}
			else
			{
				minute=0;
				ring_tmr=50;
				if(hour<0x24)
				{
					hour++;
					hour=da_adjust(hour);
				}
				else hour=0;
			}
		}
		disbuf[5] = (hour&0xf0)>>4;
		disbuf[4] = hour&0x0f;
		disbuf[3] = (minute&0xf0)>>4;
		disbuf[2] = minute&0x0f;
		disbuf[1] = (second&0xf0)>>4;
		disbuf[0] = second&0x0f;
	}
	if(ring_tmr != 0)
	{
		ring_tmr--;
		if(ring_tmr == 0) RING = 0;
	}
	tmr3_done=0;
} 

uchar da_adjust(uchar da)
{
	if((da&0x0f)>9) da += 0x06;
	return (da);
}