两个51单片机分别连接一个四位共阳7段数码管（数码管段选引脚连接P0口、位选引脚连接P2口），两个单片机进行串口通信，要求单片机1的共阳数码管初始显示2313，单片机2的共阳数码管初始显示2305，按下按钮两个单片机互相发送并接受数据并显示在共阳数码管上（按下按钮后单片机1显示2305、单片机2显示2313），请写出符合上述要求的代码

单片机1代码：

#include <reg51.h>

typedef unsigned char uint8_t;
typedef unsigned int uint16_t;

#define FOSC 11059200L
#define BAUD 9600

sbit LSA = P0 ^ 2;
sbit LSB = P0 ^ 3;
sbit LSC = P0 ^ 4;
sbit K1 = P3 ^ 2;

uint8_t code table[] = {0xc0, 0xf9, 0xa4, 0xb0, 0x99, 0x92, 0x82, 0xf8, 0x80, 0x90};

uint8_t uart_receive() {
    while (!RI);
    RI = 0;
    return SBUF;
}

void uart_send(uint8_t dat) {
    SBUF = dat;
    while (!TI);
    TI = 0;
}

void delay(uint16_t t) {
    while (t--);
}

void display(uint16_t num) {
    uint8_t i, j;
    uint8_t dat[4];

    for (i = 0; i < 4; i++) {
        dat[i] = num % 10;
        num /= 10;
    }

    for (i = 0; i < 4; i++) {
        for (j = 0; j < 8; j++) {
            if (i == 0) LSA = 1;
            else LSA = 0;
            if (i == 1) LSB = 1;
            else LSB = 0;
            if (i == 2) LSC = 1;
            else LSC = 0;
            P2 = table[dat[i]];
            delay(100);
            P2 = 0x00;
        }
    }
}

void main() {
    uint16_t num = 2313;
    uint8_t receive_data;

    TMOD = 0x20;
    TH1 = TL1 = FOSC / 12 / 32 / BAUD - 1;
    TR1 = 1;
    SM0 = 0;
    SM1 = 1;
    REN = 1;

    while (1) {
        display(num);
        if (K1 == 0) {
            uart_send(num / 1000);
            uart_send(num % 1000 / 100);
            uart_send(num % 100 / 10);
            uart_send(num % 10);
            while (K1 == 0);
        }
        receive_data = uart_receive();
        if (receive_data != 0xff) {
            num = receive_data * 1000;
            receive_data = uart_receive();
            num += receive_data * 100;
            receive_data = uart_receive();
            num += receive_data * 10;
            receive_data = uart_receive();
            num += receive_data;
        }
    }
}

单片机2代码：

#include <reg51.h>

typedef unsigned char uint8_t;
typedef unsigned int uint16_t;

#define FOSC 11059200L
#define BAUD 9600

sbit LSA = P0 ^ 2;
sbit LSB = P0 ^ 3;
sbit LSC = P0 ^ 4;
sbit K1 = P3 ^ 2;

uint8_t code table[] = {0xc0, 0xf9, 0xa4, 0xb0, 0x99, 0x92, 0x82, 0xf8, 0x80, 0x90};

uint8_t uart_receive() {
    while (!RI);
    RI = 0;
    return SBUF;
}

void uart_send(uint8_t dat) {
    SBUF = dat;
    while (!TI);
    TI = 0;
}

void delay(uint16_t t) {
    while (t--);
}

void display(uint16_t num) {
    uint8_t i, j;
    uint8_t dat[4];

    for (i = 0; i < 4; i++) {
        dat[i] = num % 10;
        num /= 10;
    }

    for (i = 0; i < 4; i++) {
        for (j = 0; j < 8; j++) {
            if (i == 0) LSA = 1;
            else LSA = 0;
            if (i == 1) LSB = 1;
            else LSB = 0;
            if (i == 2) LSC = 1;
            else LSC = 0;
            P2 = table[dat[i]];
            delay(100);
            P2 = 0x00;
        }
    }
}

void main() {
    uint16_t num = 2305;
    uint8_t receive_data;

    TMOD = 0x20;
    TH1 = TL1 = FOSC / 12 / 32 / BAUD - 1;
    TR1 = 1;
    SM0 = 0;
    SM1 = 1;
    REN = 1;

    while (1) {
        display(num);
        if (K1 == 0) {
            uart_send(num / 1000);
            uart_send(num % 1000 / 100);
            uart_send(num % 100 / 10);
            uart_send(num % 10);
            while (K1 == 0);
        }
        receive_data = uart_receive();
        if (receive_data != 0xff) {
            num = receive_data * 1000;
            receive_data = uart_receive();
            num += receive_data * 100;
            receive_data = uart_receive();
            num += receive_data * 10;
            receive_data = uart_receive();
            num += receive_data;
        }
    }
}