采用两块MSP430F169分别作为主,从模块,进行通讯,采用的示例是CCS自带的程序:fet140_i2c_04,
fet140_i2c_05。开发板的SDA和SCL分别接10K的上拉电阻,然后连接P3.1和P3.3口进行测试。数据通信不正常,SDA端口原来是高电平,通过连线连接之后直接变低电平了,程序进不了中断不能收发数据。请问怎么排查故障,有什么提示吗?谢谢!
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采用两块MSP430F169分别作为主,从模块,进行通讯,采用的示例是CCS自带的程序:fet140_i2c_04,
fet140_i2c_05。开发板的SDA和SCL分别接10K的上拉电阻,然后连接P3.1和P3.3口进行测试。数据通信不正常,SDA端口原来是高电平,通过连线连接之后直接变低电平了,程序进不了中断不能收发数据。请问怎么排查故障,有什么提示吗?谢谢!