ADE7753读寄存器出来的一直是零

我对ADE7753做如下初始化：
void ADE7753_init()
{
spiwriteint(REG_MODE,Reset_CONFIG);
delay_us(60000);
spiwriteint(REG_MODE,MODE_CONFIG);
spiwriteint(REG_LINECYC,LINECYC_CONFIG);
spiwritechar(REG_GAIN,GAIN_CONFIG);
spireadlong(REG_RAENERGY);
spiwriteint(REG_IRMSOS, IRMSOS_CONFIG);
spiwriteint(REG_APOS, APOS_CONFIG);
spiwritechar(REG_CH1OS,CH1OS_CONFIG);
spiwritechar(REG_TMODE,0xcc);
}
然后读TMODE寄存器temp = spireadchar(REG_TMODE);但是读出来的一直是零，问题出在那呢？（REF = 2.43左右，其他输出为低电平）在做项目的，急！谢谢