无法读取SPI Slave的低8位

I Sp1＝0；SSP1STATBIT。SSP1BUF＝1；SSP1BUF＝0；SSP1IF＝0；IEC1位。SSP1IE＝0SSP1STATBITS。CKE＝1；SCP1CONBITE。CSPP＝0；SSP1 CONBITE。SSP1CONBITE。SSPN＝1；SPIX读（）{UITN8 VAL1= 0；UITN8 VAL2= 0；UIT8TXXRDYBuff= 0；PLLL L。你好，我使用的是PIC24F16KM204，时钟频率为4MHZ。E＝低；TXYRDYBUFF＝0x80*0x02；//0x02从属寄存器地址和0x80，用于启用SPI读Val1= Access SPI1（TXYRDYBUFF）；Val2= Access SPI1（TXYRDYBUFF）；PLLYLE＝高；} Val2是较低的8位给出适当输出。Val1巫是上8位不给我输出为0。如果有错误，请告诉我。在我的代码中。注意：当从配置正确的时候，SPI写入是成功的。问候，Biswajit



      以下为原文

    Hi,
I am using PIC24F16KM204 with clock frequency of 4MHZ.
SPI Coniguration:

SSP1CON1bits.SSPEN=0;
SSP1STATbits.SMP= 1;
SSP1BUF=0;
IFS1bits.SSP1IF=0;
IEC1bits.SSP1IE=0
SSP1STATbits.CKE=1;
SSP1CON1bits.CKP=0;
SSP1CON1bits.SSPM=0;
SSP1CON1bits.SSPEN=1;

spi_read()
{
UINT8 val1=0;
UINT8 val2=0;
UINT8 tx_rd_buff=0;
PLL_LE=LOW;
tx_rd_buff=0x80 | 0x02; //0x02 slave register address and 0x80 for enabling spi read
val1= accessSPI1(tx_rd_buff);
val2=accessSPI1(tx_rd_buff);
PLL_LE=HIGH;
}
val2 which is a lower 8bit gives the proper  output.val1 witch is the upper 8bit is not giving me output as 0.
Let me know if any mistake is there in my code.
Note:SPI write is success as the slave is getting configured properly.

Regards,
Biswajit