帮我写一份基于AT89C51型号共阴极的单片机代码，效果要求为利用定时/计数器T1产生定时时钟,由P1口控制8个发光二极管,使8个指示灯依次一个一个闪动，闪动频率为10次/(8个灯依次亮一遍为一个周期)，循环。设晶振频率为12MHz。

好的，以下是基于AT89C51型号共阴极的单片机代码，实现8个指示灯依次闪动的效果：

#include <reg52.h>
#define FREQ 12000000UL // 晶振频率

sbit LED_1 = P1 ^ 0; // 指示灯1
sbit LED_2 = P1 ^ 1; // 指示灯2
sbit LED_3 = P1 ^ 2; // 指示灯3
sbit LED_4 = P1 ^ 3; // 指示灯4
sbit LED_5 = P1 ^ 4; // 指示灯5
sbit LED_6 = P1 ^ 5; // 指示灯6
sbit LED_7 = P1 ^ 6; // 指示灯7
sbit LED_8 = P1 ^ 7; // 指示灯8

void init_timer1() // 初始化定时/计数器 T1
{
    TMOD |= 0x10; // T1 工作在模式1：16位定时器
    TH1 = 0x00; // 高字节初始值为0
    TL1 = 0x00; // 低字节初始值为0
    TR1 = 1; // 启动 T1
}

void delay(uint16_t count) // 延时函数
{
    uint16_t i, j;

    for (i = 0; i < count; i++)
    {
        for (j = 0; j < 1000; j++);
    }
}

void main()
{
    uint8_t led_count = 0; // 记录当前亮灯的编号
    uint16_t timer_count = 0; // 记录定时器计数器的值

    init_timer1(); // 初始化定时/计数器 T1

    while (1)
    {
        if (TF1) // T1 溢出中断
        {
            TF1 = 0; // 清除 T1 溢出中断标志
            timer_count++; // 定时器计数器加1

            if (timer_count == FREQ / 10 / 8) // 闪动频率为10次/(8个灯依次亮一遍为一个周期)
            {
                timer_count = 0; // 重置定时器计数器
                led_count++; // 亮灯编号加1

                if (led_count == 1) // 依次亮灯
                {
                    LED_1 = 1; LED_2 = 0; LED_3 = 0; LED_4 = 0; LED_5 = 0; LED_6 = 0; LED_7 = 0; LED_8 = 0;
                }
                else if (led_count == 2)
                {
                    LED_1 = 0; LED_2 = 1; LED_3 = 0; LED_4 = 0; LED_5 = 0; LED_6 = 0; LED_7 = 0; LED_8 = 0;
                }
                else if (led_count == 3)
                {
                    LED_1 = 0; LED_2 = 0; LED_3 = 1; LED_4 = 0; LED_5 = 0; LED_6 = 0; LED_7 = 0; LED_8 = 0;
                }
                else if (led_count == 4)
                {
                    LED_1 = 0; LED_2 = 0; LED_3 = 0; LED_4 = 1; LED_5 = 0; LED_6 = 0; LED_7 = 0; LED_8 = 0;
                }
                else if (led_count == 5)
                {
                    LED_1 = 0; LED_2 = 0; LED_3 = 0; LED_4 = 0; LED_5 = 1; LED_6 = 0; LED_7 = 0; LED_8 = 0;
                }
                else if (led_count == 6)
                {
                    LED_1 = 0; LED_2 = 0; LED_3 = 0; LED_4 = 0; LED_5 = 0; LED_6 = 1; LED_7 = 0; LED_8 = 0;
                }
                else if (led_count == 7)
                {
                    LED_1 = 0; LED_2 = 0; LED_3 = 0; LED_4 = 0; LED_5 = 0; LED_6 = 0; LED_7 = 1; LED_8 = 0;
                }
                else if (led_count == 8)
                {
                    LED_1 = 0; LED_2 = 0; LED_3 = 0; LED_4 = 0; LED_5 = 0; LED_6 = 0; LED_7 = 0; LED_8 = 1;
                    led_count = 0; // 重置亮灯编号
                }
            }
        }
    }
}

希望能够帮到你！