Rif.: multiple SPI device on myRIO

[David15]

Hi,

I need to acquire 2 PT1000 and 2 Resistance with myRIO for my application.

In order to achive a good measurements I thinked to implement a 4 wire measurements for the PT1000, and the resistance trought a MAX31865 device.

The MAX31865 has a SPI interface, so my question is how can connect 4(or more) SPI devices to myRIO?

Infact myRIO has only 2 SPI( one for the A MXP and one for the B MXP).

Can you show me an example of code to manage this four devices?

regards

david

[Lamber_86]

Hello David15,

myRIO device has an integrated FPGA chip so you can implement multiple SPI communication.

You can use the following API, downloadable from VI Package Manager:

http://sine.ni.com/nips/cds/view/p/lang/it/nid/210637

[David15]

Hi Lamber,

I already found and installed the API you mentioned in your post, but I have a broken VI also if I deselect mass Mass Compile VIs After Package Installation checkbox.

And I don't understand how to manage 4 different Cs.

Can the multiple SPI devices be acquire simultaneuslly?Or should I select the CS alternately?

may I manage multiple SPI devices without FPGA programming??

thanks

David