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I have an existing embedded source code which runs directly on a microcontroller with no operating system. I need to port the code to run on a specific RTOS.
Are there any guidelines in where to start when attempting wuch a thing ?
Resources, best practices, and other insight will be much appriciated.
RTOS preemptive multitasking is all about I/O performance. You need drivers that can make a thread ready when I/O is complete, eg. by signaling a semaphore. Nothing else is remotely as important.
Sadly, this usually means a system redesign to eliminate the performance-crippling polling that existed before :((