#include <reg52.h>
#include <intrins.h>
#define uchar unsigned char
#define uint unsigned int
sbit SDA = P1^1;
sbit SHIFT_CP = P1^2;
sbit ST_CP = P1^0;
#define NOP _nop_()
uchar ledcode[] =
{
0x3F,
0x06,
0x5B,
0x4F,
0x66,
0x6D,
0x7D,
0x07,
0x7F,
0x6F,
};
uchar ledbitselect[] = {0x0fe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};
//11111110 11111101 11111011 11110111 11101111 11011111 10111111 01111111
uchar i;
void InitSerialPort(void)
{
SDA = 0;
SHIFT_CP = 0;
ST_CP = 0;
}
void delay(void)
{
uchar jj;
for(jj=0;jj<200;jj++);
while(jj--);
}
void SerialSendData(uchar dat)
{
uchar ii;
uchar sdata=dat;
for(ii=0;ii<8;ii++)
{
if(sdata&0x80)SDA=1;
else SDA = 0;
sdata<<=1;
SHIFT_CP =0;
NOP;
NOP;
SHIFT_CP = 1;
NOP;
NOP;
}
ST_CP = 1;
NOP;
NOP;
ST_CP = 0;
}
//LED 共阴
void main()
{
InitSerialPort();
while(1){
delay();
delay();
P2 = ledbitselect[i];
SerialSendData(ledcode[i]);
i=(i+1)%8;
}
}