在keil上实现stc89c52RC单片机如何通过esp8266接收来自串口发送来的数据并显示在lcd1602上的c语言完整代码

以下是在Keil上实现STC89C52RC单片机通过ESP8266接收串口数据并将其显示在LCD1602上的C语言完整代码：

#include <reg52.h>
#include <stdio.h>
#include <string.h>
#include "lcd1602.h"

#define FOSC 11059200L
#define BAUD 9600
#define TIMER_1MS (65536-FOSC/1000)

sbit ESP_RTS = P1^0;
sbit ESP_CTS = P1^1;
sbit ESP_RST = P1^2;

volatile unsigned int Timer1Count;

void Timer1Init()
{
    TMOD |= 0x10;    //set timer1 as timer mode
    TH1 = TIMER_1MS / 256;
    TL1 = TIMER_1MS % 256;
    EA = 1;          //enable global interrupt
    ET1 = 1;         //enable timer1 interrupt
    TR1 = 1;         //start timer1
}

void Timer1Handler() interrupt 3
{
    TF1 = 0; //clear interrupt flag
    TH1 = TIMER_1MS / 256;
    TL1 = TIMER_1MS % 256;
    Timer1Count++;
}

void DelayMs(unsigned int ms)
{
    Timer1Count = 0;
    while(Timer1Count < ms);
}

void ESP_SendByte(unsigned char byte)
{
    ES = 0; //disable serial interrupt
    SBUF = byte;
    while(!TI);
    TI = 0;
    ES = 1; //enable serial interrupt
}

unsigned char ESP_RecvByte()
{
    unsigned char byte;
    ES = 0; //disable serial interrupt
    if(RI)
    {
        byte = SBUF;
        RI = 0;
    }
    ES = 1; //enable serial interrupt
    return byte;
}

void ESP_SendString(char *str)
{
    while(*str)
    {
        ESP_SendByte(*str++);
    }
}

void ESP_Reset()
{
    ESP_RST = 0;
    DelayMs(100);
    ESP_RST = 1;
    DelayMs(5000);
}

void ESP_Init()
{
    ESP_Reset();
    ESP_SendString("AT+RST\r\n");
    DelayMs(5000);
    ESP_SendString("AT+CWMODE=1\r\n");
    DelayMs(1000);
    ESP_SendString("AT+CWJAP=\"SSID\",\"password\"\r\n");
    DelayMs(2000);
}

void main()
{
    char buffer[16];
    unsigned char recv_byte;
    unsigned char recv_index;
    unsigned char recv_data[64];
    unsigned char recv_flag = 0;
    unsigned char i;

    TMOD &= 0xF0; //set timer0 as timer mode
    TMOD |= 0x01;
    TH0 = 0xFC;   //10ms
    TL0 = 0x67;
    ET0 = 1;      //enable timer0 interrupt
    TR0 = 1;      //start timer0

    LCD_Init();

    ESP_Init();

    while(1)
    {
        if(recv_flag)
        {
            recv_flag = 0;
            if(strcmp(recv_data, "Hello") == 0)
            {
                LCD_Clear();
                LCD_WriteString("Hello World!");
                ESP_SendString("OK\r\n");
            }
            else if(strcmp(recv_data, "Time") == 0)
            {
                sprintf(buffer, "Time:%d", TH0 * 256 + TL0);
                LCD_Clear();
                LCD_WriteString(buffer);
                ESP_SendString("OK\r\n");
            }
            memset(recv_data, 0, sizeof(recv_data));
            recv_index = 0;
        }
        if(ESP_RTS == 0 && ESP_CTS == 1)
        {
            recv_byte = ESP_RecvByte();
            recv_data[recv_index++] = recv_byte;
            if(recv_byte == '\n')
            {
                recv_flag = 1;
            }
        }
    }
}

void Timer0Handler() interrupt 1
{
    TH0 = 0xFC;
    TL0 = 0x67;
    LCD_Update();
}

在这个代码中，我们使用了STC89C52RC单片机和ESP8266模块。在初始化函数`ESP_Init()`中，我们设置ESP8266连接到Wi-Fi网络，并将其设置为客户端模式。

在主循环中，我们检查`ESP_RTS`和`ESP_CTS`引脚的状态以接收串口数据。当接收到完整的数据包时，我们可以根据其内容在LCD1602上显示相应的信息并回复ESP8266一个“OK”字符串作为确认。

我们还使用了计时器1和计时器0来实现延迟和LCD更新。

请注意，此代码仅是示例代码，您需要根据您的具体硬件和需求进行修改和优化。