用stc8h8k64u单片机写一个电子时钟程序

好的，下面是一个简单的电子时钟程序，使用STC8H8K64U单片机和LCD1602液晶屏幕。程序实现了显示当前的时、分、秒和日期。

#include <STC8.H>

#define LCD_RS P1_0
#define LCD_RW P1_1
#define LCD_EN P1_2
#define LCD_DATA P0

unsigned char time[8];
unsigned char date[8];
unsigned char week[8];

void delay(unsigned int t);
void init_clock(void);
void init_lcd(void);
void write_cmd(unsigned char cmd);
void write_data(unsigned char dat);
void write_str(unsigned char str[]);

void main(void)
{
    init_clock();
    init_lcd();

    while (1) {
        time[0] = RTC_HOUR;
        time[1] = RTC_MINUTE;
        time[2] = RTC_SECOND;
        date[0] = RTC_YEAR;
        date[1] = RTC_MONTH;
        date[2] = RTC_DAY;
        week[0] = RTC_WEEK;

        write_cmd(0x80); // Set cursor to first line
        write_str(time); // Display time
        write_cmd(0xC0); // Set cursor to second line
        write_str(date); // Display date
        write_data(' ');
        write_str(week); // Display week

        delay(500); // Delay for half a second
    }
}

void init_clock(void)
{
    RTC_SEC = 0x00;   // Second
    RTC_MIN = 0x30;   // Minute
    RTC_HOUR = 0x12;  // Hour
    RTC_DAY = 0x15;   // Day
    RTC_MONTH = 0x03; // Month
    RTC_YEAR = 0x21;  // Year
    RTC_WEEK = 0x03;  // Week (Wednesday)
    RTC_CON = 0x80;   // Enable RTC
}

void init_lcd(void)
{
    write_cmd(0x38); // Function set: 8-bit, 2-line, 5x7 dots
    write_cmd(0x08); // Display off
    write_cmd(0x01); // Clear display
    write_cmd(0x06); // Entry mode set: increment, no shift
    write_cmd(0x0C); // Display on, cursor off, blinking off
}

void write_cmd(unsigned char cmd)
{
    LCD_RS = 0;
    LCD_RW = 0;
    LCD_DATA = cmd;
    LCD_EN = 1;
    LCD_EN = 0;
    delay(5);
}

void write_data(unsigned char dat)
{
    LCD_RS = 1;
    LCD_RW = 0;
    LCD_DATA = dat;
    LCD_EN = 1;
    LCD_EN = 0;
    delay(5);
}

void write_str(unsigned char str[])
{
    unsigned char i = 0;
    while (str[i] != '\0') {
        write_data(str[i]);
        i++;
    }
}

void delay(unsigned int t)
{
    unsigned int i, j;
    for (i = 0; i < t; i++) {
        for (j = 0; j < 1000; j++);
    }
}

这个程序使用了STC8H8K64U单片机的RTC模块来获取当前的时间和日期。在主函数的while循环中，我们从RTC模块获取当前的时间和日期，并将它们显示在LCD1602液晶屏幕上。程序不断循环，每隔0.5秒更新一次显示。

程序中还包含了一些LCD屏幕初始化和写入命令和数据的函数。为了让程序更加易于理解，我使用了一些宏定义来代替硬编码的数字。请注意，这个程序可能需要根据您的硬件和需要进行修改。