LAUNCHXL-F28379D: How to approach bidirectional serial communication

Iasonas Kalaitzakis

I am using Simulink's SCI Transmit and Receive blocks microcontroller wise, and the read() and write() commands in Matlab. How would I go about creating bidirectional serial communication between the two? I have figured out how to make the controller or the PC write and the other read and vice versa but not at the same time.

over 4 years ago

0 Santosh Jha over 4 years ago

TI__Guru 50611 points

Hi,

I have contacted MathWorks team to help us on this. Due to holiday break, lot of folks are out of office, so response will be delayed. Sincere apology for inconvenience.

0 Ram Swaroop Alla over 4 years ago

Intellectual 730 points

Hi Iasonas,

You may need to consider a two model approach if you need to communicate between the host and the controller. In the two model approach, the idea is to create two models, one that runs on the target and sends data to serial. The second one runs on the host and gets data from the target.

Here is an example of DC DC buck converter that takes this approach:
https://www.mathworks.com/help/supportpkg/texasinstrumentsc2000/ug/dc-dc-buck-converter.html

Best Regards,

Ram Alla.

0 Iasonas Kalaitzakis over 4 years ago in reply to Ram Swaroop Alla

Prodigy 10 points

I had already tried the method provided in the above example, but could not get it to work for my project. I assumed it was because of the difference between using Matlab's read() and write() as the host versus using the Simulink serial communication blocks.

After more trial and error, I discovered that issue stemmed from the receiver running on CPU1 of the controller, and the transmitter on CPU2. Moving the two SCI blocks on the same CPU resolved my issues.

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LAUNCHXL-F28379D: How to approach bidirectional serial communication