In Chapter4, Resource-Restricted Embedded Systems,we looked at how to pick an appropriate microcontroller for an embedded platform. While designing the firmware for the MCU, it's essential that we consider not only the resource requirements of specific codes, but also the ease of debugging.
An important advantage of using C++ is the abstractions it offers, including the ability to subdivide the code into logical classes, namespaces, and other abstractions that allow us to easily reuse, test, and debug the code. This is a crucial aspect in any design, and an aspect that needs to be implemented fully before one can proceed with actually implementing the design.
Depending on the design, it can be either very easy or frustratingly hard to debug any issue, or anything in between. If there's a clean separation between all the functionality, without leaky APIs or similar problems that could leak internal, private data, creating different versions of fundamental classes for things...