我现在使用了 AD7490 转换芯片，使用的是 Linux 系统，然后在应用层直接读写数据，现在的问题是
当我先发送了 两次 {0xff 0xff} 后，发送 0x830 读取通道 0 的数据，数据是完全正确的，但是当我用 0x870 读取第二个通道的数据时，读到的数据一直是 0 。读取其他的通道也是 0 ，不知道是什么问题。所以想请教一下。
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