Hiển Thị chữ lên led ma trận 8x8 dùng 1 IC 74HC595

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#include <REGX52.H>
sbit SCK = P3^0;
sbit DATA = P3^1;
sbit SCL = P3^2;
//  1     2 3  4    5    6
unsigned char code mang[] = { 0xFC,0xFC,0x80,0x80,0xFC,0xFC,
   0x83,0xF5,0xF6,0xF5,0x83,
     0x80,0xFD,0xFB,0xF7,0x80,0xFF,0xff
 }; //T A N
unsigned char cot[8]   = {0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80};



void delay(unsigned int t)
{
unsigned int i,j;
for(i=0;i<t;i++)
for (j=0;j<=125;j++);
}

void quet(unsigned char x)
{
int i,temp;
for(i=0;i<8;i++)
{
temp = x;
temp = temp&0x80;
if(temp==0x80) DATA = 1;
else DATA = 0;
x*=2;
SCK = 0;
SCK = 1;
}
SCL = 0;
SCL = 1;
}

void main()
{
int j,i,k;
while(1)
{
for(j=0;j<18;j++)

for(k=0;k<10;k++)//tan so quet
for(i=0;i<8;i++)
{
P2=cot[i];
quet(mang[(i+j)%18]);
delay(5);
}
P2=0;
delay(100);
}
}