LAUNCHXL-F280049C: LAUNCHXL-F280049C: SCI Connection in Simulink

Amine Jebali2

Hello,

I am setting up a communication link between a Pc app and the LAUNCHXL-F280049C. I am using an external FTDI chip USB to serial converter to connect the SCI_B Rx and Tx lines from target.

The Tx works fine I am receiving the data I am sending from the target.However I am encountering a strange issue on the Rx sid: while in external mode ( which uses SCI-A ) I am trying to display 4 bytes of data sent from the PC App on SCI_B

If I sent "1234", I receive "1020". there are always zeros between the bytes received and I have no clue where it is coming from.

I am relatively new to Simulink and C2000 and I though someone might have had this issue.

Your help is greatly appreciated.

Regards,

over 5 years ago

0 Vince over 5 years ago

TI__Mastermind 19795 points

EDIT: Closing duplicate thread, please see following thread:

https://e2e.ti.com/support/microcontrollers/c2000/f/171/t/939360

0 Amine Jebali2 over 5 years ago in reply to Vince

Prodigy 60 points

Hello Vince and thanks a lot for your reply

Here is a logic analyzer trace of the Rx line.There is no zero int he Tx line and the bytes are transmitted with almost no delay after each byte.

I am pretty sure the host is sending the right amount of data and the UART is configured the same way on the host and Target. ( bits/parity/stop/baud)

the echoback example works just fine, but I am trying to run a simulink model and therefore setup the SCI with Simulink and Embedded coder support package for TI.

I am running the Simulink model in polling mode though, not interrupt based, and wondering if this has something to do with this issue.

0 Vince over 5 years ago in reply to Amine Jebali2

TI__Mastermind 19795 points

Hi AJ,

Sorry for the confusion, I saw your image response in the other thread, so I've moved my response over there! I will be closing this one now, so please check my response over there, thanks!

Regards,

Vince

C2000™︎ microcontrollers

C2000 microcontrollers forum

LAUNCHXL-F280049C: LAUNCHXL-F280049C: SCI Connection in Simulink