Yes, the F28377S is supported so long as you don’t use any dual core features. Note that the 28377S LaunchPad has different GPIO pins for serial communication than the 28379D LaunchPad. The GPIO are configured in the Coder options + Target + External mode tab. The documentation highlights this, copied below.
There are many other reasons why a target would not respond. First try with a simple model from the demo library to test connection issues. If your application specific model doesn’t run, refer to this article on debugging these issues.
