Problem with multiple TWI slave initialization

RE: Problem with multiple TWI slave initialization

dewal — Tue, 20 Apr 2021 12:30:45 GMT

hi, can you please provide your source. I have problem to integrate multiple slave device through TWI.

please reply me

RE: Problem with multiple TWI slave initialization

Dan — Wed, 31 May 2017 02:01:14 GMT

That seems like a possibility I'll look into it. Thanks for all the help.

RE: Problem with multiple TWI slave initialization

Jørgen Holmefjord — Mon, 29 May 2017 09:32:34 GMT

Are you setting m_xfer_done = false elsewhere in your code? I see you set this between transfers inside the functions, but not at the end. This could cause two transfers to be started at the same time.

RE: Problem with multiple TWI slave initialization

Dan — Sat, 27 May 2017 13:17:11 GMT

So here's the really weird and stupid thing. I ran in debug mode with DEBUG enabled I get invalid data in the second twi transfer in the accelerometer setup but then I was curious if the temp sensor would report the problem if it was listed second so I switched the order. Now the outputs work.

I'm glad my code is working but the order in which I set up and call my devices shouldn't matter. Any thoughts.

I re-ordered it to set-up and run accelerometer first and now it works.

Here's a link to the set_mode functions. https://justpaste.it/177w9

RE: Problem with multiple TWI slave initialization

Jørgen Holmefjord — Mon, 22 May 2017 07:30:16 GMT

Most likely you get an error from one of the function calls, resulting in the error handler being called. Try debugging using this method, to see which function is failing, and what the returned error code is. It would also help if you could post the LM75B_set_mode/MM865_set_mode functions.