1Introduction to the Independent Watchdog The watchdog is a hardware timer whose main function is to forcibly reset the entire system when a software fault or program runaway occurs, allowing it to return to normal operation. It is an independent system that can continue to operate even if the main clock fails, thus ensuring high … Read more
1. Two Types of Watchdogs in STM32 The STM32F103C8T6 has two built-in watchdogs: the Independent Watchdog and the Window Watchdog. Independent Watchdog (IWDG) Uses an internal low-speed clock (LSI, typical value 40kHz) as the time base. It cannot be stopped and can operate independently even if the CPU hangs. It is commonly used for system-level … Read more
System unexpectedly rebooting, critical data lost? It might be your watchdog ‘protesting’!As an embedded developer, have you ever encountered such an awkward scenario: the microcontroller is writing critical data to internal Flash, and suddenly the system reboots, resulting in data loss and making it difficult to diagnose the fault? This is likely due to the … Read more
1. IntroductionThe IWDG, short for Independent Watchdog, is essentially a counter that can generate a system reset signal.Features: (1) A decrementing counter. (2) The clock is provided by an independent RC oscillator (internal LSI) and can operate in both standby and stop modes. Once the watchdog is activated, it generates a reset when the decrementing … Read more