NI-8452 ChipSelect pin with Matlab

Question

Po-Tsung 2019-5-22

回答： John Hribar 2019-5-27

Hi,

I'm trying to send SPI control signals to an device that we are testing recently over the NI-8452.

The signal geneerated from the NI-8452 SPI_SCLK and SPI_MOSI pins are all correct.

A 'ChipSelect' sign from NI-8452 CS0 pin is also generated correctly.

However, the device need another signal from the NI-8452 CS1 pin.

I checked the Matlab Instrument Contrl Toolbox user's guide, but did not find a clear answer.

It only described the ChipSelect value is 0.

So, the question is can Matlab fully utilize the NI-8452 and generate signals from mulitple Cihip Select pins now?

Thank you very much

Answer 1

John Hribar 2019-5-27

Hi,

ChipSelect is a property of the spi object in Matlab. The default is zero, but you can change this to any chip select pin 0-7 by typing

S.ChipSelect = pinNumber;

where pinNumber is the desired pin and S is the name of your spi object defined by

S = spi('ni845x', 0, 0);

I hope this helps.