at89s52单片机用16x16矩阵键盘流动显示“单片机”的程序

以下是at89s52单片机用16x16矩阵键盘流动显示“单片机”的程序，供你参考：

#include <reg52.h>
#define uint unsigned int
#define uchar unsigned char

sbit ROW1 = P1^0;   // 行1
sbit ROW2 = P1^1;   // 行2
sbit ROW3 = P1^2;   // 行3
sbit ROW4 = P1^3;   // 行4
sbit ROW5 = P1^4;   // 行5
sbit ROW6 = P1^5;   // 行6
sbit ROW7 = P1^6;   // 行7
sbit ROW8 = P1^7;   // 行8

sbit COL1 = P2^0;   // 列1
sbit COL2 = P2^1;   // 列2
sbit COL3 = P2^2;   // 列3
sbit COL4 = P2^3;   // 列4
sbit COL5 = P2^4;   // 列5
sbit COL6 = P2^5;   // 列6
sbit COL7 = P2^6;   // 列7
sbit COL8 = P2^7;   // 列8

uchar code table[] = "单片机"; // 要显示的字符串
uchar buffer[16];              // 缓存区
uint index = 0;                // 缓存区索引
uint delay_time = 200;         // 显示间隔时间

void delay_ms(uint ms)         // 延时函数
{
    uint i, j;
    for (i = 0; i < ms; i++)
        for (j = 0; j < 120; j++);
}

void init_keyboard()           // 初始化矩阵键盘
{
    ROW1 = ROW2 = ROW3 = ROW4 = ROW5 = ROW6 = ROW7 = ROW8 = 0;
    COL1 = COL2 = COL3 = COL4 = COL5 = COL6 = COL7 = COL8 = 1;
}

uchar scan_keyboard()          // 扫描矩阵键盘
{
    uchar key = 0;
    ROW1 = 0; ROW2 = ROW3 = ROW4 = ROW5 = ROW6 = ROW7 = ROW8 = 1;
    if (COL1 == 0) { delay_ms(10); if (COL1 == 0) key = 1; }
    if (COL2 == 0) { delay_ms(10); if (COL2 == 0) key = 2; }
    if (COL3 == 0) { delay_ms(10); if (COL3 == 0) key = 3; }
    if (COL4 == 0) { delay_ms(10); if (COL4 == 0) key = 4; }
    if (COL5 == 0) { delay_ms(10); if (COL5 == 0) key = 5; }
    if (COL6 == 0) { delay_ms(10); if (COL6 == 0) key = 6; }
    if (COL7 == 0) { delay_ms(10); if (COL7 == 0) key = 7; }
    if (COL8 == 0) { delay_ms(10); if (COL8 == 0) key = 8; }
    ROW1 = ROW2 = ROW3 = ROW4 = ROW5 = ROW6 = ROW7 = ROW8 = 0;
    COL1 = COL2 = COL3 = COL4 = COL5 = COL6 = COL7 = COL8 = 1;
    return key;
}

void display_character(uchar c) // 在LED点阵上显示字符
{
    uchar i;
    for (i = 0; i < 16; i++)
    {
        P0 = c;
        P1 = ~(1 << i);
        delay_ms(1);
    }
}

void main()
{
    uchar key;
    uint i, j;
    while (1)
    {
        init_keyboard();
        key = scan_keyboard();
        if (key != 0)
        {
            buffer[index++] = table[key-1];
            if (index >= 16) index = 0;
        }
        for (i = 0; i < 16; i++)
        {
            display_character(buffer[i]);
            for (j = 0; j < delay_time; j++);
        }
    }
}

该程序实现了矩阵键盘的扫描和LED点阵的流动显示功能，可以根据具体情况进行修改和优化。