SPI communication to Arduino

Fridell

Other Parts Discussed in Thread: DRV8301

Hello!

I have set up my DRV8301 development kit controlling a motor on an electric scooter. I have reached lab 5a where I set the current-reference from the onboard pot-meter.

I want to have some visualisation on my scooter where I want to show battery-voltage (DC-bus), motorspeed and stator resistance (which from I can calculate the motor temperature). I want to use the isolated SPI-interface to connect to an Arduino. The Arduino will show the input data on a OLED-display.

The SPI-configuration in the Arduino is pretty easy, but I am struggling a bit with the software in Code Composer Studio. I am not sure where to start, or what code to write.

Is anything like this been done earlier? Can anyone give me some help on this?

Thank you very much!

over 9 years ago

0 Trey German289 over 9 years ago

TI__Mastermind 22025 points

Hi Fridell,

Is there a reason you want to use a separate micro controller to drive the display? The device that is driving the motor should be able to drive the display as well as the motor.

If you're concerned about the display library you're using for the display which was written for Arduino, don't be! We have a SPI library which uses the same APIs as Arduino. This means you can combine the display library you're using with this SPI library to drive the display:

1212.SPI.zip

Which device are you running the InstaSpin labs with?

BR,

0 Fridell over 9 years ago in reply to Trey German289

Intellectual 310 points

Hello.

I have several Arduinos on my scooter controlling lights, display and everything else than the motor. That's why I want to send the motor-information to my Arduino microcontroller.

I am running the InstaSpin with the F28069.

0 Trey German289 over 9 years ago in reply to Fridell

TI__Mastermind 22025 points

You still should be able to use that SPI library to talk to your arduinos just as you would on an arduino :-)

0 Fridell over 9 years ago in reply to Trey German289

Intellectual 310 points

Yes, I will try to do that. I also see that the development board's SPI runs on 3.3V, while the Arduino's runs on 5V. I guess I'll have to make som small adjustments to the onboard isolated SPI-amplifier.

Thank you!

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SPI communication to Arduino