怎么改成用定时器间隔1s滚动

#include<reg51.h>
unsigned char string[]={
0x80,0x00,0x80,0x00,0x80,0x00,0xFC,0x1F,0x84,0x10,0x84,0x10,0x84,0x10,0xFC,0x1F,
0x84,0x10,0x84,0x10,0x84,0x10,0xFC,0x1F,0x84,0x50,0x80,0x40,0x80,0x40,0x00,0x7F,

0x08,0x00,0x08,0x00,0xFC,0x3F,0x04,0x00,0xF2,0x0F,0x01,0x00,0xFC,0x0F,0x00,0x08,
0x00,0x08,0x00,0x08,0x00,0x08,0x00,0x08,0x00,0x50,0x00,0x50,0x00,0x60,0x00,0x40,

0x10,0x00,0xF8,0x07,0x04,0x04,0xFE,0x1F,0x85,0x10,0x44,0x10,0xFC,0x1F,0x60,0x00,
0x98,0x08,0x46,0x05,0x30,0x03,0x8E,0x05,0x60,0x09,0x18,0x11,0x47,0x61,0x80,0x00,
};

void delay(unsigned char i)
{
unsigned char t;
while(i--)
{
for(t=0;t<120;t++);
}
}
void matrix()
{
    unsigned char i=0,j=0,k=0;
    for(j=0;j<3;j++)
    {
        for(k=0;k<50;k++)
        {
            for(i=0;i<16;i++)
            {
            P1=i;
            P0=string[j*32+i*2];
            P2=string[j*32+i*2+1];
            delay(1);
            }
        }
    }
}
void main()
{
    while(1)
    {
    matrix();
    }
}

1,修改matrix函数,可以传入滚动位置参数，根据滚动位置参数调整扫描顺序
2,写个定时器中断，比如中断周期10毫秒
3，在中断里计数，比如周期是10毫秒，累加到100，就是1秒了，把滚动位置的计数加1，
4，执行matrix函数，传入滚动位置的计数，