#include <STC8G.H>
#include <intrins.h>

// ================= 1. 引脚定义 =================
sbit BTN1 = P5^4; // 按钮1 -> Pin 1
sbit BTN2 = P5^5; // 按钮2 -> Pin 3
sbit BTN3 = P3^2; // 按钮3 -> Pin 7
sbit BTN4 = P3^3; // 按钮4 -> Pin 8

// ================= 2. 待发送的十六进制指令集 =================
unsigned char code data1[]   = {0xAA, 0x06, 0x01, 0x98, 0x03, 0x01, 0xD0, 0xAC}; // 按钮1数据
unsigned char code data2[]   = {0xAA, 0x06, 0x01, 0x98, 0x02, 0x02, 0xB2, 0x0A}; // 按钮2数据
unsigned char code data3_1[] = {0xAA, 0x06, 0x01, 0x98, 0x01, 0x03, 0x51, 0xC6}; // 按钮3数据第1段
unsigned char code data3_2[] = {0xAA, 0x06, 0x00, 0x9F, 0x01, 0x03, 0x09};       // 按钮3数据第2段
unsigned char code data4[]   = {0xAA, 0x06, 0x01, 0x98, 0x04, 0x00, 0x75, 0x03}; // 按钮4数据

// ================= 3. 毫秒级延时函数 (@24.000MHz) =================
void Delay_ms(unsigned int ms) {
    unsigned char i, j;
    while(ms--) {
        _nop_();
        i = 32;
        j = 40;
        do {
            while (--j);
        } while (--i);
    }
}

// ================= 4. 串口初始化函数 (2400bps @ 24MHz) =================
void UART_Init(void) {
    SCON = 0x50;  // 8位可变波特率，允许接收
    AUXR |= 0x40; // 定时器1工作在1T模式
    AUXR &= 0xFE; // 串口1使用定时器1作为波特率发生器
    TMOD &= 0x0F; // 设置定时器1模式
    
    // 重装载值: 65536 - (24000000 / 4 / 2400) = 63036 = 0xF63C
    TL1 = 0x3C;   
    TH1 = 0xF6;   
    
    ET1 = 0;      // 禁止定时器1中断
    TR1 = 1;      // 启动定时器1
}

// ================= 5. 数据发送函数 =================
void UART_SendByte(unsigned char dat) {
    SBUF = dat;
    while (!TI);  // 等待发送完毕
    TI = 0;       // 清除发送中断标志位
}

void UART_SendArray(unsigned char *arr, unsigned char len) {
    unsigned char i;
    for(i = 0; i < len; i++) {
        UART_SendByte(arr[i]);
    }
}

// ================= 6. 引脚模式初始化 =================
void GPIO_Init(void) {
    // 设置按键对应引脚为准双向口模式（带内部上拉）
    P3M1 &= ~0x0C; P3M0 &= ~0x0C; // P3.2, P3.3
    P5M1 &= ~0x30; P5M0 &= ~0x30; // P5.4, P5.5
}

// ================= 7. 主逻辑 =================
void main(void) {
    GPIO_Init();
    UART_Init();
    
    while(1) {
        // --- 按钮 1 ---
        if (BTN1 == 0) {
            Delay_ms(20); // 软件消抖
            if (BTN1 == 0) {
                UART_SendArray(data1, sizeof(data1));
                while(BTN1 == 0); // 松手检测
            }
        }
        
        // --- 按钮 2 ---
        if (BTN2 == 0) {
            Delay_ms(20); 
            if (BTN2 == 0) {
                UART_SendArray(data2, sizeof(data2));
                while(BTN2 == 0); 
            }
        }
        
        // --- 按钮 3 (连续双包发送) ---
        if (BTN3 == 0) {
            Delay_ms(20); 
            if (BTN3 == 0) {
                UART_SendArray(data3_1, sizeof(data3_1));
                Delay_ms(10); // 帧间微延时，防止接收端黏包
                UART_SendArray(data3_2, sizeof(data3_2));
                while(BTN3 == 0); 
            }
        }
        
        // --- 按钮 4 ---
        if (BTN4 == 0) {
            Delay_ms(20); 
            if (BTN4 == 0) {
                UART_SendArray(data4, sizeof(data4));
                while(BTN4 == 0); 
            }
        }
    }
}