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 can't disagree with that :thumbs_up:

Carl_G · 2025-03-10

If you don't know what I mean by #2 you need to reread my post. Its the only relevant point. You are fixated on torn values. I keep explaining that is not the only issue with concurrency. If you find any concurrency example online it will probably in...

Carl_G · 2025-03-10

@TDK you mean if I was updating a separate variable then setting the flag to let another "thread" know the variable was updated then just making the bool volatile would in theory not be enough?

Carl_G · 2025-03-10

True for #1 but what about issue #2?

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...

User statistics

User Activity

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