使用pic单片机的spi模块控制ds1302，求大神帮看问题！

#include
typedef unsigned char uchar;
typedef unsigned int uint;
uint sec = 0 ,sec1 = 0 ,sec2 = 0;
const unsigned char table[10] = {0B00111111,       
0B00110000,       
0B01011011,       
0B01111001,       
0B01110100,       
0B01101101,       
0B01101111,       
0B00111000,       
0B01111111,       
0B01111101};       
void WriteByte(uint address); //写一个字节
uchar ReadByte(); //读一个字节
uchar ReadDS1302(uint address); //读取ds1302中的数据
void WriteCommand(uint address , uint data);//往ds1302中写数据
void InitDS1302(); //ds1302的初始化
void interrupt Display(); //中断并显示
void Init(); //端口初始化
void Spi_Init(); //spi的初始化

void main()
{
Init();
Spi_Init();
InitDS1302();
INTCON = 0b11100000;
while(1)
{
sec = ReadDS1302(0x81); //读取秒钟的时间
sec1 = sec & 0X0f;
sec2 = sec >> 4;
}
}

void WriteByte(uint address)
{
SSPSTAT = 0b10000000; //cke = 0
RC0 = 1;         //RC0被用来接CE线
SSPBUF = address;
while(0 == SSPIF);
SSPIF = 0;
RC0 = 0;       
}

uchar ReadByte()
{
TRISC4 = 1;
SSPSTAT = 0b11000000;
RC0 = 1;
uchar data = 0;
while(0 == BF);
data = SSPBUF;
RC0 = 0;
TRISC4 = 0;
return data;
}

uchar ReadDS1302(uint address)
{
uint tmp = 0 ,data;
uint i;
WriteByte(address); //写入addr
data = ReadByte(); //读取
for(i = 0; i < 8; i++) //将数据顺序矫正
{
tmp = data & 0X01;
data >>= 1;
tmp << =7;
data = data | tmp;
}
return data;
}

void WriteCommand(uint address , uint data)
{
WriteByte(address);
WriteByte(data);
}

void InitDS1302()         //ds1302的数据顺序和spi的顺序是反的，所以设置的数据也反着来
{
WriteCommand(0Xe1 , 0X00);        //写保护寄存器关闭
WriteCommand(0X01 , 0X80);        //秒为1,同时开启时钟；
WriteCommand(0X41 , 0X2C);        //分为1；
WriteCommand(0X21 , 0X48);        //时为1；
WriteCommand(0X61 , 0X80);        //日为1；
WriteCommand(0X11 , 0X80);        //月为1；
WriteCommand(0X51 , 0X80);        //星期1；
WriteCommand(0X31 , 0X80);        //年份1；
WriteCommand(0X01 , 0X80);        //秒为1,同时开启时钟；
WriteCommand(0Xe1 , 0X01);        //写保护寄存器开启;
}

void interrupt Display()
{
PORTB = 0Xfe;
PORTA = table[sec2];
_delay(50);
PORTA = 0X00;

PORTB = 0Xfd;
PORTA = table[sec1];
_delay(50);
PORTA = 0X00;
TMR0 = 0Xea;
T0IF = 0;
}

void Init()
{
ANSEL = 0X00;
ANSELH = 0X00;
TRISA = 0X00;
TRISB = 0X00;
PORTB = 0Xff;
INTCON = 0;
OSCCON = 0b01010001; //2M时钟
OPtiON_REG= 0b01010010 ; //预分频8
}

void Spi_Init()
{
TRISC = 0X00;
SSPCON = 0b00100000;
SSPSTAT = 0b11000000;
ADCON1 = 0b00000110;
}