MSP430FR5994: MSP430FR5994+sensor I2C communication

Hi,

1 slave and multislave are different configuring mode for I2C peripheral. I may say 10k pullup resistor should be okay for a general design. But you should scope the I2C bus to confirm the signals are correct.

For how to configure multislave mode, you could take below example code as reference.

http://dev.ti.com/tirex/explore/node?devices=MSP430FR5994&node=AFv1u168GDsHGJXx4ItqMQ__IOGqZri__LATEST

Thanks for your answer, but it isn´t multislave mode. Every I2C modul only communicates with one sensor.

Hi,

sorry for miss-understanding you configuration. So you are using 3 different I2C modules to communicate with each 3 sensor, right?

If yes, did you mean that the one, which already working well with one sensor,  can't work with other 2 sensors?

Yes I am using 3 sensors on 3 different moduls. But my problem is that even the one modul, which already worked doesn´t even work properly anymore. Most times it will be busy, before I can send any sort of start condition. I am looking for the reason why it behaves like that. I am not exchanging the sensors or anything like that, I just want to use one modul with one sensor.

My SDA is constantly low and doesn´t recover rom that. Just for some additional Information.

Thanks for helping

Hi,

You can check why the SDA is constantly low, which shouldn't be that.