Further reading

• For an in-depth discussion about multi-layer drivers, see TinyOS TEP101, which uses a layered approach to drivers. The interface approach described in this chapter fits quite well with the TinyOS HPL, HAL, and HIL approach:
  https://github.com/tinyos/tinyos-main/blob/master/doc/txt/tep101.txt
• Here are some more additional resources that should help you out:
  • https://embeddedartistry.com/blog/2019/08/05/practical-decoupling-techniques-applied-to-a-c-based-radio-driver/
  • https://embeddedartistry.com/blog/2020/01/27/leveraging-our-build-systems-to-support-portability/
  • https://embeddedartistry.com/blog/2020/01/20/prototyping-for-portability-lightweight-architectural-strategies/
  • https://blog.wingman-sw.com/archives/282 - Unit Testing RTOS dependent code- RTOS Test Double