Looking Inside and Creating Your Customized Image
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Part 2 of a NuttX RTOS getting-started series. Covers the NuttX source tree structure (arch, boards, drivers, fs, sched, etc.), how to list and switch board profiles, how to use menuconfig to enable applications (with search tricks for resolving dependencies), and how to save a custom defconfig as a reusable board profile. Includes a practical walkthrough: enabling the getprime benchmark app, compiling it, running it in the simulator, and saving it as a new board profile for future use. Also briefly demonstrates running a Rust Hello World example on the simulator.