.
├── docs
├── external
│ └── libmcu
├── include
├── ports
│ └── esp-idf
├── src
└── tests
├── fakes
├── mocks
├── runners
├── src
└── stubs
| Directory | Desc. |
|---|---|
| docs | Documentation |
| external | Third-party libraries or SDK. e.g. ESP-IDF |
| include | The project header files |
| ports | Wrappers or glue code to bring third-party drivers into the project |
| src | Application code. No hardware or platform-specific code |
| tests | Test codes |