rc531读正常写不正确

47857815@qq.com

可以正确读出内部只读寄存器值，但写入再读出后不正常，求助各位
void SPI1_Init(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;
  SPI_InitTypeDef  SPI_InitStructure;

//?è??rst,nss,pa0

  //RST
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC,ENABLE);
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
  GPIO_Init(GPIOC, &GPIO_InitStructure);

  //NSS
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

//????PA0:?è??????×???
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA|RCC_APB2Periph_SPI1, ENABLE );//GPIOA ?±??????//SPI1 ?±??????  

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;  //GPIOA 5 6 7???????ì???? 
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);//??????GPIOA
  GPIO_SetBits(GPIOA,GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7); //GPIOA 5 6 7????

//  LOW 2 ??·??? ?????à?? ×???????°???
SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;  //?è??SPI???ò?ò?????ò??????????:SPI?è???????????ò?????¤
SPI_InitStructure.SPI_Mode = SPI_Mode_Master; //?è?????÷SPI
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b; //SPI·???????8?????á??
SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low; //?®???????±????????×????? ??????
SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge; //?®???????±??????1????±????¨?????ò?????©????±????ù
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft; //NSS???????????¨NSS?????©?????í???¨????SSI???©???í:????NSS??????SSI??????
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_64; //?¨???¨?????¤·???????:?¨?????¤·???????256
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB; //???¨??????????MSB??????LSB??????:??????????MSB??????
SPI_InitStructure.SPI_CRCPolynomial = 7; //CRC?????????à????
SPI_Init(SPI1, &SPI_InitStructure);  //?ù??SPI_InitStruct?????¨???????????????èSPIx?????÷
SPI_Cmd(SPI1, ENABLE); //????SPI???è

SPI1_SetSpeed(SPI_BaudRatePrescaler_64); 
//SPI1_ReadWriteByte(0xff);//????????  

SPI1_RST_L;
delay_ms(50);
SPI1_RST_H;
delay_ms(10);
SPI1_RST_L;
SPI1_CS_L;
SPI1_ReadWriteByte(0xff);
SPI1_CS_H;
} 

//SPI ?????è??????
//SpeedSet:
//SPI_BaudRatePrescaler_2   2·???   
//SPI_BaudRatePrescaler_8   8·???   
//SPI_BaudRatePrescaler_16  16·???  
//SPI_BaudRatePrescaler_256 256·??? 
  
void SPI1_SetSpeed(u8 SPI_BaudRatePrescaler)
{
  assert_param(IS_SPI_BAUDRATE_PRESCALER(SPI_BaudRatePrescaler));
SPI1->CR1&=0XFFC7;
SPI1->CR1|=SPI_BaudRatePrescaler; //?è??SPI1???? 
SPI_Cmd(SPI1,ENABLE); 
} 

//SPIx ????????×???
//TxData:????????×???
//·?????:????????×???
u8 SPIWriteByte(u8 Byte)
{
while((SPI1->SR&0X02)==0); //??????  
SPI1->DR=Byte;            //????byte   
while((SPI1->SR&0X01)==0);      //???????byte  
return SPI1->DR;              //???????
}

u8 SPI1_ReadWriteByte(u8 TxData)
{
u8 retry=0;
SPI1_CS_L;
//while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);

while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET) //?ì?é???¨??SPI±ê?????è????·?:·?????????±ê????
{
retry++;
if(retry>200)return 0;
}  

SPI_I2S_SendData(SPI1, TxData); //?¨?????èSPIx·???????????
retry=0;

//while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET);

while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET) //?ì?é???¨??SPI±ê?????è????·?:????????·???±ê????
{
retry++;
if(retry>200)return 0;
}
SPI1_CS_H;
return SPI_I2S_ReceiveData(SPI1); //·????¨??SPIx×??ü??????????    
u8 rc522_reg_read(u8 addr)  
 
{   
    u8 res;        //????????±???    
    u8 SndData=0;                //·???????±???    

   SndData=((addr<<1)&0x7E)|0x80;
    SPI1_ReadWriteByte(SndData);  //·????????????????÷???· 

    res = SPI1_ReadWriteByte(0x00);     //?????á?????????????÷???? 
     
    return res;
}   
     
u8 rc522_reg_write(u8 addr, u8 Data)  
 
{   
    u8 SndAddr;   
  SndAddr=((addr<<1)&0x7e);
    SPI1_ReadWriteByte(SndAddr);  //??????±ê???·    

// delay_us(2);
   SPI1_ReadWriteByte(Data);     //????????  
//return 0;
} 

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