About Carl_G

Carl_G · 2025-03-08

I'm running the ADC on STM32G071 and I am seeing double spikes when the ADC takes a reading. Any idea why there are two spikes? I expect to see just one. Below you see two spikes followed by another two spikes 1ms later. My software starts an ADC rea...

Carl_G · 2025-03-07

I traditionally use a volatile type for my schedulers. Very simple like so volatile uint8_t myflag; uint8_t ticks; void Func(void){ ++ticks; if(!(ticks % 5)){ myflag = true; } } void User(void){ if(myflag) { myflag = false; //DO ...

Carl_G · 2025-03-06

I am using the STM32G071. My first board is built on the G071G8UxN. This is a 28-pin version.UCPD1_DBCC2 on pin 14 PB0UCPD1_DBCC2 is also on PA10 but that's not connected on the 28-pin version. However, you can remap and replace PA12(pin 19) with PA1...

Carl_G · 2025-03-04

I am using TIM2 to create PWMs for LEDs. When I enter STOP mode I expect the PWM to stop. Yet it does not. From the manual TIM do not have wakeup capability from stop mode. So they should not be requesting the HSI to operate.What could possibly cause...

Carl_G · 2025-03-04

I'm working on getting the STM32G0 to stop mode. Im using WFI so it will wake on interrupt. Right now its immediately waking which is confusing me.My understanding is that I should __disable_irq() first to prevent the interrupt handlers from being ca...

Carl_G · 2025-03-10

I think you are taking this term Atomicity to only refer to corrupting the value but there is more to it than that.If you look at the standard concurrency example of two threads incrementing a number there are 2 issues.1. A non-atomic sized number ca...

Carl_G · 2025-03-09

Are you being pedantic about the term "synchronization"? Because clearly in multithreaded environments you need to ensure changes made by one thread are seen by another with some deterministic sequence and timing.

Carl_G · 2025-03-09

Per your definition, no boolean ever needs synchronization. Correct?

Carl_G · 2025-03-09

What do you mean by "not modified"? The bool in my example is modified by both processes.

Carl_G · 2025-03-09

"Func" operates within an interrupt. User is within the function main(). So there needs to be some synchronization.I'm not sure how to check if its void. The other calls don't link so that is how I know they are not there. But some of these are suppo...

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Spikes from the ADC

Atomic variable for scheduler question

Pin Remapping Confusion

TIM still running in STOP

Clear Interrupts Prior to sleep confusion

Re: Atomic variable for scheduler question

Re: Atomic variable for scheduler question

Re: Atomic variable for scheduler question

Re: Atomic variable for scheduler question

Re: Atomic variable for scheduler question