最近開始玩微控制器,用資料管的時候發現是陽極管,所以陰極管的消影方法就不是很適用了.

於是直接利用消影抽象方法:消去上階段的資料來去除這階段出現的上階段殘影.

以下是程式碼及消影解釋:

/*
中斷計時器及資料管(陽極管)消影
*/
#include <reg52.h>

sbit LATCH1 = P2^2;//段碼
sbit LATCH2 = P2^3;//位碼

unsigned char code LedChar[]=
{
 0xC0,0xF9,0xa4,0xb0,0x99,0x92,0x82,0xf8,
 0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e
};
unsigned char ADDNum[8]=
{
 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff
};
unsigned char flag1s = 0;
unsigned int  cnt    = 0;
unsigned char i      = 0;

void main()
{						
	unsigned int sec = 0;
	unsigned char k  = 0;
    EA |= 1;
    ET0 = 1;
	TMOD= 0x01;
	TH0 = 0xfc;
	TL0 = 0x67;
	TR0 = 1;
	while(1)
	{
	if (flag1s==1)
	{
	unsigned char sgn = 0;
	flag1s = 0;
	sec++;
	if (sec/10==0)
	sgn = 0;
	else if (sec/100==0)
	sgn = 1;
	else if (sec/1000==0)
	sgn = 2;
	else if (sec/10000==0)
	sgn = 3;
	else sgn =4;
	for(k=0;k<=sgn;k++)
	switch(k)
	{
		case 0:ADDNum[k]=LedChar[sec%10];break;
		case 1:ADDNum[k]=LedChar[sec/10%10];break;
		case 2:ADDNum[k]=LedChar[sec/100%10];break;
		case 3:ADDNum[k]=LedChar[sec/1000%10];break;
		case 4:ADDNum[k]=LedChar[sec/10000%10];break;
		case 5:ADDNum[k]=LedChar[sec/10^5%10];break;
		case 6:ADDNum[k]=LedChar[sec/10^6%10];break;
		case 7:ADDNum[k]=LedChar[sec/10^7%10];break;
		default:break;
	}
	}
	}

}

void InterruptTimer0() interrupt 1
{

	TH0 = 0xFC;
	TL0 = 0x67;
	TF0 = 0;
	cnt++;

	if(i>=8)
	i=0;

	if (cnt >= 1000)
	{
	 	cnt    = 0;
		flag1s = 1;
	}
	
	P0     = ~0xff;     //重置段碼消除上階段顯示的資料   消隱完成:)
	LATCH1 = 1;         //該段程式碼不能寫在 輸入段碼 之後  其本身就是輸入顯示為空的段碼來消去上一階段的剩餘輸入
	LATCH1 = 0;
	
	P0     = ~(0x80>>i);//用位操作確定位碼
	LATCH2 = 1;
	LATCH2 = 0;
	P0     = ~ADDNum[i];//輸入段碼(該階段要顯示的資料)
	LATCH1 = 1;
	LATCH1 = 0;
	i++;
}