dot_6.c

点阵

/*--------------------------------------------------------------*/
//LED8*8滚动显示
//列扫描，低电平有效

#include <reg52.h>


/*--------------------------------------------------------------*/
//接口定义
#define	L	P0	//列
#define R	P2	//行


/*--------------------------------------------------------------*/
//全局变量定义
unsigned char m, i;
unsigned int  n;


/*--------------------------------------------------------------*/
//代码库
#define  num  sizeof(table)	//代码长度
unsigned char code table[]= {
/*--  宽度x高度=200x8  --*/
0x00,0x00,0x00,0x00,0x00,
0x00,0x42,0x7E,0x42,0x00,0x00,0x00,0x7E,0x40,0x40,0x00,0x7E,0x42,0x7E,0x00,0x3E,
0x40,0x3E,0x00,0x7E,0x52,0x52,0x00,0x00,0x00,0x0E,0x70,0x0E,0x00,0x7E,0x42,0x7E,
0x00,0x7E,0x40,0x7E,0x00,0x00,0x00,0x42,0x7E,0x40,0x00,0x52,0x52,0x7E,0x00,0x42,
0x7E,0x40,0x18,0x14,0x7E,0x10,0x00,0x1C,0x22,0x44,0x22,0x1C,0x00,0x00,0x3C,0x42,
0x4A,0x62,0x4A,0x42,0x3C,0x00,0x00,0x7E,0x10,0x7E,0x00,0x7C,0x12,0x7C,0x00,0x7E,
0x0A,0x0E,0x00,0x7E,0x0A,0x0E,0x00,0x0E,0x70,0x0E,0x00,0x00,0x00,0x7E,0x04,0x18,
0x20,0x7E,0x00,0x7E,0x52,0x52,0x00,0x3E,0x40,0x7E,0x40,0x3E,0x00,0x00,0x00,0x0E,
0x70,0x0E,0x00,0x7E,0x52,0x52,0x00,0x7C,0x12,0x7C,0x00,0x7E,0x1A,0x6E,0x00,0x00,
0x72,0x52,0x5E,0x00,0x7E,0x42,0x7E,0x00,0x7E,0x42,0x7E,0x00,0x5E,0x52,0x7E,0x00,
0x08,0x08,0x08,0x00,0x7E,0x42,0x7E,0x00,0x72,0x52,0x5E,0x00,0x08,0x08,0x08,0x00,
0x7E,0x42,0x7E,0x00,0x42,0x7E,0x40,0x00,0x00,0x00,0x42,0x7E,0x40,0x00,0x52,0x52,
0x7E,0x00,0x24,0x00,0x18,0x14,0x7E,0x10,0x00,0x5E,0x52,0x7E,0x00,0x00,0x00,0x0C,
0x02,0x4C,0x40,0x4C,0x02,0x0C,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};


/*--------------------------------------------------------------*/
void Display()
{    
	L = ~(0x01 << i);					//开始列扫描
	R = table[i + n];					//查表取出数据
	i++; if(i == 8) i = 0;				//循环扫描
	m++; if(m == 50) {m = 0; n++;}		//滚动速度控制
	if(n == num-7) n = 0;				//循环显示
}


/*--------------------------------------------------------------*/
//定时器初始化
void T0_init(void)
{
    TMOD = 0x01;
    TH0  = 0xec;		//5000us
    TL0  = 0x7e;
    IE   = 0x82;
    TR0  = 1;
}


/*--------------------------------------------------------------*/
//定时器中断服务
void T0_intservice(void) interrupt 1 using 0
{
    TH0 = 0xec;
    TL0 = 0x7e;
	Display();
}


/*--------------------------------------------------------------*/
//主函数
void main (void)
{
	T0_init();
	while(1);
}