In the last article, we looked at how PendSV swaps thread contexts using prebuilt stack frames. Now it’s time to give our kernel a proper yield mechanism — so threads can give up the CPU voluntarily, or automatically via a…
One of the most magical parts of an RTOS is when the CPU suddenly stops running one function and starts running another — as if by sleight of hand. In MicrOS, this magic is powered by the PendSV exception and…
With the LM3S8965EVB QEMU target, MicrOS has taken its first big step into becoming a real operating system:we now support context switching and a simple task API. In this post, I’ll explain what a context switch is, why it matters,…