Fast control loop and communication

mosin

Hi,

I'm working on a project with a fast control loop, 25us maximum, using a delfino F28335. I'm now designing a way to add modularity to my control block and be able to have multiple modules talking to each other by exchanging parameters. I was wondering if anybody has any ideas how I could add some communication in the smallest amount of time. I have maybe 5us to waste for now. One thing I just saw is the concerto... A new family with a C2000 + Cortex M3. It's probably the best thing suited for my purpose. The C2000 could continue to do 25us control loop and I could dedicate the M3 to do communications... Each module would be composed of a Concerto and their M3 could talk to each other using CAN or SPI... Again, in 25us ( fully dedicated for the comm ), would that be enough to exchange a couple of bytes...

Anybody has ideas :)

Thanks!!

over 14 years ago

Blake TI Community over 14 years ago

TI__Guru* 92935 points

Mosin,

Happy New Year and thanks for your question. Let me move your thread over to the C2000 forum for you to get help with your questions.

Blake

Brett Novak over 14 years ago in reply to Blake TI Community

TI__Intellectual 1030 points

Mosin

Since you essentially have two cores, 25uS for comms should be more than enough, depending on the payload / packet size. The CAN stack is very small, both in size and cycle count, as is the SPI. And, you don't have the burden of the control loop and the comms running in parallel with eath other on a single core. This is really the type of application we designed concerto around!

Brett N

mosin over 14 years ago in reply to Brett Novak

Expert 1160 points

Thanks for the feedback Brett! Without the concerto, only with the Delfino, do you see a possibility for it... Concerto is definitly in our roadmap but I want to see if I have other options...

Regards

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Fast control loop and communication