f28335 sci monitoring using simulink

Francisco Javier López Alcolea

Hello,

I am using TI f28335 board for my final degree project and now I have to communicate the f28335 board to monitoring some variables that are being modified during the software runs. I have read that this must be accomplished using the rs232 interface. I also know that this kind of communication on simulink is performed by the sci communication block.

My problem occurs while I am trying to read the information that is supposedly being transfered through the rs232 connection. I am starting to think that I am not connecting correctly the TX RX and GND pins that carry the information.

I have connected the J3 TX, RX and GND pins on the experimenter kit to the pins 2, 3 and 10 on a db25 rs232 connector respectively. It's the first time that i work with that type of communication and I am not sure if I am doing it right.

When I use the SCI RECEIVE block on simulink for hosting the communication I set COM4 as the port in which I have to read the information (That's the port my computer have assigned to the rs232 connector) and while simulink model is running i don't receive any information. On the SCI SETUP a baudrate of 115200 is selected.

I also tried to use the SERIAL CONFIGURATION and SERIAL RECEIVE blocks on INSTRUMENT CONTROL TOOLBOX using the same baudrate and it stills not working.

If someone can help me to solve this problem i will be really grateful because I don't really know how else try and I still don't knowing if it's a software or hardware issue due to it's the first time i use this kind of communication.

Thanks in advance,

Fco. Javier López Alcolea

over 9 years ago

0 Elizabeth Joy over 9 years ago

TI__Expert 5940 points

Hello,

I'll ask our group's MathWorks contact to take a look at this post.

Thanks,
Elizabeth

0 Elizabeth Joy over 9 years ago in reply to Elizabeth Joy

TI__Expert 5940 points

Hello,

Our MathWorks contact is currently out of the office until January, so a response on this post may be delayed.

For best support, I suggest creating a service request on the MathWorks support site:
www.mathworks.com/.../

Best of luck.

Thanks,
Elizabeth

0 Francisco Javier López Alcolea over 9 years ago in reply to Elizabeth Joy

Prodigy 30 points

Hello Elizabeth,

Thanks you for worrying about my issue. I will post also in Mathworks support site as you have suggested me.

0 Sumith Sekharan over 9 years ago

Prodigy 190 points

Hello,

Setting up the serial communication for a USB docking station is explained here: https://www.mathworks.com/help/releases/R2016b/supportpkg/texasinstrumentsc2000/ug/set-up-the-hardware-target.html

There will be some switches and jumpers on your board to be configured for the serial communication to work properly.

Are you able to communicate over serial using CCS examples? Is the problem occurs only when you use the Simulink Blocks to generate code?

Please contact MathWorks Technical Support for additional assistance.

Thanks,

Sumith

0 Francisco Javier López Alcolea over 9 years ago in reply to Sumith Sekharan

Prodigy 30 points

Hello Sumith,

Thanks for worrying about my issue. I haven't tried with the examples on ccs yet, but I will try as soon as possible.

I have tried with an example of matlab in which the sci blocks were implemented and it stills not working.

Reading the Matlab Page you have suggested me I have seen that the swich only disable the Rx from the maxx chip so i think i can feed the board with the usb wire while i am sending data using the rs232 communication. I am right or I should feed the table with an external source? Maybe this is the meaning mistake that I am commiting.

Regards,

Fco. Javier López Alcolea

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f28335 sci monitoring using simulink