用c51单片机实现以下功能的16*16led点阵显示屏

要实现16*16 LED点阵的显示屏，需要使用C51单片机的GPIO口控制LED点阵的行列扫描，以及使用定时器产生LED点阵扫描所需的时序信号。

以下是一个简单的C51单片机实现16*16 LED点阵显示屏的代码：

#include <reg51.h>

// 定义LED点阵行列GPIO口
sbit ROW1 = P1^0;
sbit ROW2 = P1^1;
sbit ROW3 = P1^2;
sbit ROW4 = P1^3;
sbit ROW5 = P1^4;
sbit ROW6 = P1^5;
sbit ROW7 = P1^6;
sbit ROW8 = P1^7;
sbit COL1 = P2^0;
sbit COL2 = P2^1;
sbit COL3 = P2^2;
sbit COL4 = P2^3;
sbit COL5 = P2^4;
sbit COL6 = P2^5;
sbit COL7 = P2^6;
sbit COL8 = P2^7;

// 16*16 LED点阵数据
unsigned char code LED_Matrix[16][16] = {
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}
};

// LED点阵扫描函数
void LED_Scan() {
  unsigned char i,j;
  for(i=0; i<16; i++) {
    for(j=0; j<16; j++) {
      if(LED_Matrix[i][j] == 1) {  // LED点亮
        switch(i) {
          case 0: ROW1=0; break;
          case 1: ROW2=0; break;
          case 2: ROW3=0; break;
          case 3: ROW4=0; break;
          case 4: ROW5=0; break;
          case 5: ROW6=0; break;
          case 6: ROW7=0; break;
          case 7: ROW8=0; break;
        }
        switch(j) {
          case 0: COL1=1; break;
          case 1: COL2=1; break;
          case 2: COL3=1; break;
          case 3: COL4=1; break;
          case 4: COL5=1; break;
          case 5: COL6=1; break;
          case 6: COL7=1; break;
          case 7: COL8=1; break;
        }
      } else {  // LED熄灭
        switch(i) {
          case 0: ROW1=1; break;
          case 1: ROW2=1; break;
          case 2: ROW3=1; break;
          case 3: ROW4=1; break;
          case 4: ROW5=1; break;
          case 5: ROW6=1; break;
          case 6: ROW7=1; break;
          case 7: ROW8=1; break;
        }
        switch(j) {
          case 0: COL1=0; break;
          case 1: COL2=0; break;
          case 2: COL3=0; break;
          case 3: COL4=0; break;
          case 4: COL5=0; break;
          case 5: COL6=0; break;
          case 6: COL7=0; break;
          case 7: COL8=0; break;
        }
      }
    }
  }
}

// 定时器中断处理函数
void Timer0_ISR() interrupt 1 {
  LED_Scan();
}

// 主函数
void main() {
  TMOD = 0x01;  // 定时器0工作方式1
  TH0 = 0xFC;   // 定时器0初值，产生1ms的中断
  TL0 = 0x67;
  ET0 = 1;      // 允许定时器0中断
  EA = 1;       // 开启总中断
  TR0 = 1;      // 开始定时器0
  while(1) {
    // TODO: 更新LED_Matrix中的数据
  }
}

在主函数中，需要不断更新LED_Matrix中的数据，以更新LED点阵的显示内容。在定时器中断处理函数中调用LED_Scan函数，以完成LED点阵的行列扫描。