CY8C21434_SPIM 读写操作

lzp315

请问有谁调试成功过CY8C21434 SPIM 模块的读操作，我可以向SPI从设备写操作，但是死活都不能进行读操作，
请高手指点：
void SPI_Write(unsigned char dig)
{
        PRT2DR |= CS;
        while(!(SPIM_1_bReadStatus() & SPIM_1_SPIM_TX_BUFFER_EMPTY)){};
        PRT2DR &= ~CS;                         // set slave select low
        SPIM_1_SendTxData(dig); // set message to transmit       
        while(!(SPIM_1_bReadStatus() & SPIM_1_SPIM_SPI_COMPLETE)){};
        PRT2DR |= CS;                        //
}

unsigned char SPI_Read(void)
{
        unsigned char ReceivedData;
       
        PRT2DR |= CS;
       
        PRT2DR &= ~CS;
        SPIM_1_SendTxData(0x00);  // 写伪数据，以便读到数据                                   
        while(!(SPIM_1_bReadStatus() &  SPIM_1_SPIM_RX_BUFFER_FULL));//RX Buffer register has received current data
        ReceivedData = SPIM_1_bReadRxData();               
        PRT2DR |= CS;
       
        return ReceivedData;
}