Question

在一块8x8的LED点阵上循环显示0~9十个数字字符，时间间隔为1s。

单片机

Answer 1

#include <reg52.h>

sbit ADDR0 = P1^0;
sbit ADDR1 = P1^1;
sbit ADDR2 = P1^2;
sbit ADDR3 = P1^3;
sbit ENLED = P1^4;

unsigned char code image[11][8] = {
{0xC3, 0x81, 0x99, 0x99, 0x99, 0x99, 0x81, 0xC3}, //数字0
{0xEF, 0xE7, 0xE3, 0xE7, 0xE7, 0xE7, 0xE7, 0xC3}, //数字1
{0xC3, 0x81, 0x9D, 0x87, 0xC3, 0xF9, 0xC1, 0x81}, //数字2
{0xC3, 0x81, 0x9D, 0xC7, 0xC7, 0x9D, 0x81, 0xC3}, //数字3
{0xCF, 0xC7, 0xC3, 0xC9, 0xC9, 0x81, 0xCF, 0xCF}, //数字4
{0x81, 0xC1, 0xF9, 0xC3, 0x87, 0x9D, 0x81, 0xC3}, //数字5
{0xC3, 0x81, 0xF9, 0xC1, 0x81, 0x99, 0x81, 0xC3}, //数字6
{0x81, 0x81, 0x9F, 0xCF, 0xCF, 0xE7, 0xE7, 0xE7}, //数字7
{0xC3, 0x81, 0x99, 0xC3, 0xC3, 0x99, 0x81, 0xC3}, //数字8
{0xC3, 0x81, 0x99, 0x81, 0x83, 0x9F, 0x83, 0xC1}, //数字9
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, //全亮
};

void main()
{
EA = 1; //使能总中断
ENLED = 0; //使能U4，选择LED点阵
ADDR3 = 0;
TMOD = 0x01; //设置T0为模式1
TH0 = 0xFC; //为T0赋初值0xFC67，定时1ms
TL0 = 0x67;
ET0 = 1; //使能T0中断
TR0 = 1; //启动T0
while (1);
}
/* 定时器0中断服务函数 */
void InterruptTimer0() interrupt 1
{
static unsigned char i = 0; //动态扫描的索引
static unsigned int tmr = 0; //1s软件定时器
static unsigned char index = 9; //图片刷新索引

TH0 = 0xFC; //重新加载初值
TL0 = 0x67;
//以下代码完成LED点阵动态扫描刷新
P0 = 0xFF; //显示消隐
switch (i)
{
case 0: ADDR2=0; ADDR1=0; ADDR0=0; i++; P0=image[index][0]; break;
case 1: ADDR2=0; ADDR1=0; ADDR0=1; i++; P0=image[index][1]; break;
case 2: ADDR2=0; ADDR1=1; ADDR0=0; i++; P0=image[index][2]; break;
case 3: ADDR2=0; ADDR1=1; ADDR0=1; i++; P0=image[index][3]; break;
case 4: ADDR2=1; ADDR1=0; ADDR0=0; i++; P0=image[index][4]; break;
case 5: ADDR2=1; ADDR1=0; ADDR0=1; i++; P0=image[index][5]; break;
case 6: ADDR2=1; ADDR1=1; ADDR0=0; i++; P0=image[index][6]; break;
case 7: ADDR2=1; ADDR1=1; ADDR0=1; i=0; P0=image[index][7]; break;
default: break;
}
//以下代码完成每秒改变一帧图像
tmr++;
if (tmr >= 1000) //达到1000ms时改变一次图片索引
{
tmr = 0;
if (index == 0) //图片索引10~0循环
index = 10;
else
index--;
}
}

Answer 2

创业路由器设置里