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I2C控制外部设备

Yanfang Zhang
Prodigy 60 points
Other Parts Discussed in Thread: BQ32000, TMS570LS3137

I2C的自发自收没问题，但接外部设备后，向DXR寄存器写数后TXRDY一直没响应，请问XSMT和TXRDY有什么区别？有无I2C控制外部设备的例子？谢谢！