I am sending and receive data through MCU via SCI communication and set the desired baud rate with connecting the right jumper cables & I am unable to see receive signal ??

Here is the attached model for hosting and testing environment for sending data via external

• I have connected proper jumper wires for Rx and Tx pins on board.
• I have also selected desired baud rate
• I have also selected the corresponding COMx port
• Since, F28027F has SCI A, I've opted SCI A
• The time step is 0.1S and simulation time is inf
• I have also connected hardware via USB cable before turning-on MATLAB Env

Kindly, answer it if there is any steps which I have missed to understand the excerise clearly.

Answer 1

[Tridib]

Dear @rahul,

It appears that your setup is broadly correct, but a few additional checks can help isolate the issue and ensure SCI communication works reliably. You may try the following:

1. Verify that the RX/TX connections are crossed correctly and ensure GND is shared between board and host.
2. Confirm that the COM port is not being used by any other application, as this can silently block data reception.
3. Check that the selected baud rate on both models (host and target) matches exactly and that no parity/stop‑bit mismatch exists.
4. Reduce the baud rate temporarily to check for framing or timing errors.
5. Verify that the board is actually running the deployed code.
6. Confirm that the SCI‑A GPIO pins are correctly configured for SCI functionality using the appropriate pin multiplexing in your model.

Hope this helps!

[rahul]

Hello Tridib ,

TBH, the pin configuration works fine, grounding is also connected fine. When I have sent the signal from host to target , the signal correspondingly received which I have tested in scope,.

But when I send back and forth the signal using serial send and receive block the data is invisible.