MFRC500寄存器读写失败

最近在学习这款芯片的使用，本人照着手册上的时序图进行函数的编写，可是怎么调都无法成功

void WriteRawIO(unsigned char Address,unsigned char value)
{
    #if 1
    ALE=0;
    RC500CS=1;
    WR=1;
    RD=1;
    AD_OUT();

    ALE=1;
    OUTPORT(Address);
    __nop();
    ALE=0;

    RC500CS=0;
    __nop();
    WR=0;
    __nop();
    OUTPORT(value);
    __nop();
    WR=1;
    __nop();
    RC500CS=1;
    #endif
    }

unsigned char ReadRawIO(unsigned char Address)
{
    #if 1
    unsigned char data;
    ALE=0;
    RC500CS=1;
    WR=1;
    RD=1;
    AD_OUT();

    ALE=1;
    OUTPORT(Address);
    __nop();
    ALE=0;

    AD_IN();
    RC500CS=0;
    __nop();
    RD=0;
    __nop();
    data = INPORT;
    __nop();
    RD=1;
    __nop();
    RC500CS=1;

    return data;
    }

在读取的时候无法成功读取

xbyte_temp = ReadRawIO(RegPage);

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