LMP90100 with Raspberry Pi

Padmanarayanan SR

Other Parts Discussed in Thread: LMP90100

Hi,

For one of our data-logger Proof-of-Concepts, I intend to use LMP90100 as an ADC and conditioning unit between a 3-wire RTD and my Raspberry pi 2.

1) The LMP90100 datasheet doesn't seem to give more details on the software aspects. Once an SPI connection is made as per sample RTD application included, what is the exact pseudocode (steps or pseudocode of C or python or generic wiringPI or even spincl) to read the converted data and get going. If you could point me to any samples, it would be great.

2) While using the LMP90100 evaluation board, is the software only applicable for windows? Is there a tweak to directly connect it to my Raspberry pi with SPI pins?

3) Also want to know if there are better alternatives to LMP90100. We chose it because of the resolution, calibration options and sampling rate.

Thanks for answering into this, I hope the question will be useful to everyone trying IoT with Raspberry Pi.

over 10 years ago

0 Michael Stout over 10 years ago

TI__Genius 16890 points

Hello,

There is a quick start, section 10.1.1. in the datasheet that gives a general set up for the part. You will need to modify it to take into account which inputs you are using, how you are using the current sources, gain, sampling rate and so on.

There are some code examples written in C. They are available by downloading the MSP430 Interface to LMP90100 Code Library available on the Tools and Software tab on the LMP90100 web page.

The LMP90100 Sensor AFE Software Download only works on Windows.

Mike

0 Padmanarayanan SR over 10 years ago in reply to Michael Stout

Prodigy 20 points

Thanks for the reply,

Is there really a 10.1.1 section ?! (You said "There is a quick start, section 10.1.1. in the datasheet that gives a general set up for the part. ")

I see that Section 10 just talks about 'Absolute Maximum Ratings' in the datasheet.

0 Michael Stout over 10 years ago in reply to Padmanarayanan SR

TI__Genius 16890 points

Do you have the most recent version of the datasheet, it is dated January 2016, document number SNAS510S? Section 10.1.1 is on page 56.

Mike

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LMP90100 with Raspberry Pi