led.c

来自「单片机C语言程序设计实训100例」· C语言 代码 · 共 44 行

#include <reg52.h>
#include <intrins.h>
#define uchar unsigned char
#define uint unsigned int
uchar code Table_OF_Digits[]=
{
 	0x00,0x3e,0x41,0x41,0x41,0x3e,0x00,0x00,
	0x00,0x00,0x00,0x21,0x7f,0x01,0x00,0x00,
	0x00,0x27,0x45,0x45,0x45,0x39,0x00,0x00,
	0x00,0x22,0x49,0x49,0x49,0x36,0x00,0x00,
	0x00,0x0c,0x14,0x24,0x7f,0x04,0x00,0x00,
	0x00,0x72,0x51,0x51,0x51,0x4e,0x00,0x00,
	0x00,0x3e,0x49,0x49,0x49,0x26,0x00,0x00,
	0x00,0x40,0x40,0x40,0x4f,0x70,0x00,0x00,
	0x00,0x36,0x49,0x49,0x49,0x36,0x00,0x00,
	0x00,0x32,0x49,0x49,0x49,0x3e,0x00,0x00,
};
uchar i=0,t=0,Num_Index = 0;

void main()
{
 	P3 = 0x80;
	Num_Index = 0;
	TMOD = 0x00;
	TH0 = (8192-2000)/32;
	TL0 = (8192-2000)%32;
	TR0 = 1;
	IE = 0x82;
	while(1);
}

void LED_Screen_Display() interrupt 1
{
 	TH0 = (8192-2000)/32;
	TL0 = (8192-2000)%32;
	P3 = _crol_(P3,1);
	P0 = ~Table_OF_Digits[Num_Index * 8 +i];
	if(++i == 8) i = 0;
	if(++t == 250)
	{
	 	t = 0x00;
		if(++Num_Index == 10) Num_Index = 0;
	}
}