Printf debug and Semihosting on LPC

This time, I would like to introduce tips and settings about printf debug as a handy method for debugging. Printf debug is the debug using the printf() function, and whether variables are expected values, code execution, conditional branching, etc. are working properly, or not. And, It helps to visualize the log of the code execution etc. as a dynamic state of the code to output to a standard output (display etc) for debug.

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