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Learn how to implement deterministic Interrupt Service Routines (ISRs) in embedded C, focusing on volatile variables, critical sections, and avoiding non-reentrant functions.
When accessing hardware registers in embedded C, compiler optimizations can silently break your code. The volatile keyword ensures the compiler reads the register each time. This article explains why volatile is essential, shows a GPIO ISR example, and discusses trade‑offs.
I run long computations in the RStudio console and rely on the Stop button (or Esc) to cancel them. Sometimes the interrupt works immediately; other times the session appears unresponsive and my only apparent recourse is Terminate R, which discards the workspace. My understanding is that Stop sends an interrupt that R only honors when the interpreter checks
Google Colab disconnects idle sessions after roughly 90 minutes, and the only way to stop a running cell is the Stop button (kernel interrupt), which abruptly terminates code with no guaranteed cleanup. I want to handle cancellation gracefully in a long-running training cell. The interrupt raises KeyboardInterrupt in the cell, but I am unsure how to structur
embeddedc
r
rstudio
googlecolab