Dive deep into Raspberry Pi Pico and RP2040 programming in this fourth class of the HackadayU series. Explore advanced topics such as cycle counting, assembly code generation, compiler optimizations, and debugging techniques. Learn to use tools like Godbolt Compiler and GDB for efficient development. Gain hands-on experience by debugging a KeyPad project and investigating Pico internals using MicroPython. Master essential skills for embedded systems programming and hardware interaction with the Raspberry Pi Pico platform.