你能给我写一份51单片机电梯控制的代码吗运用max7219

好的，以下是一份简单的51单片机电梯控制代码，其中包含了MAX7219的控制：

#include <reg51.h>

#define MAX7219_DIN P1_0
#define MAX7219_CS P1_1
#define MAX7219_CLK P1_2

unsigned char code numTable[] = {
    0x3f, 0x06, 0x5b, 0x4f, 0x66,
    0x6d, 0x7d, 0x07, 0x7f, 0x6f
};

void writeMax7219(unsigned char address, unsigned char data) {
    unsigned char i;
    MAX7219_CS = 0;
    for (i = 0; i < 8; i++) {
        MAX7219_CLK = 0;
        MAX7219_DIN = address;
        MAX7219_CLK = 1;
        MAX7219_DIN = data;
        MAX7219_CLK = 0;
        address = address >> 1;
        data = data >> 1;
    }
    MAX7219_CS = 1;
}

void initMax7219() {
    writeMax7219(0x09, 0x00);
    writeMax7219(0x0a, 0x03);
    writeMax7219(0x0b, 0x07);
    writeMax7219(0x0c, 0x01);
    writeMax7219(0x0f, 0x00);
}

void delay(unsigned int t) {
    unsigned int i, j;
    for (i = 0; i < t; i++) {
        for (j = 0; j < 100; j++);
    }
}

void displayNum(unsigned char num) {
    unsigned char high, low;
    high = num / 10;
    low = num % 10;
    writeMax7219(1, numTable[low]);
    writeMax7219(2, numTable[high]);
}

void main() {
    unsigned char floor = 1;
    initMax7219();
    while (1) {
        displayNum(floor);
        delay(1000);
        floor++;
        if (floor > 5) {
            floor = 1;
        }
    }
}

代码中使用了MAX7219作为七段数码管的驱动芯片，通过writeMax7219函数向MAX7219发送数据来控制七段数码管的显示。initMax7219函数用来初始化MAX7219，displayNum函数用来显示数字，delay函数用来延时。在main函数中，通过循环不断地显示电梯所在的楼层，floor变量表示当前楼层，每次循环结束后楼层加1，当楼层超过5时，将楼层重置为1。