@user75010, If you are just talking test, you can instrument your C code with something like a very lightweight serial command line. For example, CmdMessenger is an Arduino C++ library that enables you to exercise compiled C(++) functions (with or without arguments) via serial connection. CmdMessenger on GitHub
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@user75010, If you are just talking test, you can instrument your C code with something like a very lightweight serial command line. For example, CmdMessenger is an Arduino C++ library that enables you to exercise compiled C(++) functions (with or without arguments) via serial connection. CmdMessenger on GitHub