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ADS1247,SPI如何验证通讯正常!

Other Parts Discussed in Thread: ADS1247

目前我是写一个寄存器就读该寄存器的值,利用示波器查看,单片机SPI有发送数据给ADS1247,但是ADS1247发回的数据都为0xFF,那样表明通讯不正常,请问有无其他比较好的方法去验证是否通讯正常?SPI总线通讯是SCL空闲是低电平,在下降沿时采样!谢谢!