您好，使用3片MAX30009通过一个SPI接口并接在一起，每片的CSB分别接一个独立的IO，原计划想通过CSB引脚拉低来选通其中一个来通信，发现读出的数据全部是0，请问是什么问题？是另外两片的I2C接口影响SPI通信了吗？有什么办法解决吗？谢谢
Hello, I am using three MAX30009 chips connected together via an SPI interface, with each chip's CSB pin connected to a separate IO. The original plan was to select one chip for communication by pulling down the CSB pin. However, I found that all the data read out was 0. What could be the problem? Is it possible that the I2C interfaces of the other two chips are affecting the SPI communication? Is there any way to solve this? Thank you
