@floppes recommends to: Read RCC_CSR as soon as possible after startup, before initializing any other peripheral. It is safe to initialize your system clocks first (which is done in SystemInit() if you use ST’s libraries). Now, to determine the exact reset cause, here’s a full function to help you. Note that all reset flags can … Read more
For the final, definitive answer to this question, jump straight down to the section below titled “Final answer to my question“. UPDATE 30 Oct. 2018: I was accidentally referencing the (slightly) wrong documents (but which said the exact same thing), so I’ve fixed them in my answer here. See “Notes about the 30 Oct. 2018 … Read more
Multiple ways to enable/disable interrupts in STM32 mcus: 1. Via ARM-core CMSIS: 1.A. For global interrupts __enable_irq() // enable all interrupts __disable_irq() // disable all interrupts // Returns the current state of the priority mask bit from the Priority Mask // Register. [0 if global interrupts are **enabled** and non-zero if they // are **disabled**] … Read more
How to do high-resolution, timestamp-based, non-blocking, single-threaded cooperative multi-tasking This isn’t a “how to read a sensor” problem, this is a “how to do non-blocking cooperative multi-tasking” problem. Assuming you are running bare-metal (no operating system, such as FreeRTOS), you have two good options. First, the datasheet shows you need to wait up to 9.04 … Read more