How can I reduce SPI clock speed of arduino with Matlab command?

I use the MATLAB® Support Package for Arduino® Hardware to control devices with SPI communication. I use Matlab r2014b version with an Arduino uno

I need to reduce SPI clock speed to 250KhZ (2MHz default speed). It seems that when you create an SPI object you can only specify the SPI mode and the bit order.

example found on Mathworks: a = arduino(‘com9'); dev = spidev(a, 4, ‘spimode', 3, ‘bitorder', ‘lsbfirst');

I tried to add the property speed and SPIspeed with no success.

Is there a way?

Thanks

[mervinj7]

Where you able to figure this out? I also need to reduce the speed of the SPI as well. Thanks!

[Michael]

Unfortunately not.

Answer 1

[Christoph Zimmermann]

The relevant property is called "bitrate"

Example: deviceObj = device(arduinoObj,'SPIChipSelectPin','D4','bitrate',2000000) creates a connection to the SPI device and sets the bitrate to 2000000 bits/s.

(Taken from https://ch.mathworks.com/help/supportpkg/arduinoio/ref/matlabshared.spi.device.html)