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ADS1278用SPI方式读取的数据出现不连续现象,请问如何解决?



现象如图,

我这里用的是SPI模式,TDM模式输入数据,8通道全开,数据设置为8位SPI数据,所以每个通道接收三次,但是看起来只有16个数据是练连续的,我用DRDY引脚下降沿中断进行读数的,因为用的28335,SPI波特率不能配置为理想的1,1/2...,每次出中断拉低拉高SYNC进行同步,请问,还有哪些地方我遗漏了吗?