About Carl_G

Carl_G · 2025-02-02

I have some data that is accessed from a normal context and also from an IRQ. I am disabling the interrupt to prevent interrupted access. So no concerns there. However, what about forcing both the normal context and the interrupt context to have the ...

Carl_G · 2025-01-24

Hi,I have been making a lot of calls into null pointers and am quite surprised at the results. I am expecting hard failures when I make this mistake but instead it seems that things just keep going and it takes a long time to realize I failed to init...

Carl_G · 2025-01-20

I have configured the comparator 2 PB6 on the STM32G071RB Nucleo board. It is configured for rising edge interrupt. As soon as HAL_COMP_Start is called on the COMP you can see the EXTI rising edge interrupt flag immediately go high. (well not immedi...

Carl_G · 2025-01-19

Hello,I am working with an STM32G071. I am using Comp2. I have configured it with the STM32CubeIDE. Presently, It is set to "medium" speed/power, and Rising Edge Input with High Hysteresis. The positive input is set to INP/PB6. The negative input is ...

Carl_G · 2024-12-08

I am using the USB PD driver package on an STM32G071. I have 4 ports. Two are SNK and the other two should operate as SNK unless I have a power source.First issue is DRP will not work unless you also enable CAD role toggle in the configuration. If yo...

Carl_G · 2025-02-03

Hi,The variables are members of a class. With the above including barriers i.e.__STATIC_INLINE void __NVIC_DisableIRQ(IRQn_Type IRQn) { if ((int32_t)(IRQn) >= 0) { NVIC->ICER[0U] = (uint32_t)(1UL << (((uint32_t)IRQn) & 0x1FUL)); __DSB(); ...

Carl_G · 2025-01-28

Seems then maybe they are interfering with each other. What if edges happen at the same time? Will the function be called multiple times or will one of the triggers be lost? What's the calling function look like?One thing you can do is put the timer ...

Carl_G · 2025-01-27

Can you increase the priority of the interrupt? Or better decrease the priority of other interrupts until you find out which one is triggering? If you can't use a proper input capture peripheral then your only alternative is to ensure this has the hi...

Carl_G · 2025-01-26

Using input capture won't be susceptible to cpu load based delays like manual counting and capturing will be.Your graph showed some pulses. Are you calling those spikes? Or did i look at the wrong graph?

Carl_G · 2025-01-24

Thanks, ill look deeper. The pointers are all 0. So i guess its doing something there. Maybe I can put something at 0 to like the codes you suggested.

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STM32G0 Concurrency Question

No error from null pointers

Comparator Bug Report on STM32G0

Analog Comparator False Initial Trigger

USBPD Driver DRP Behavior

Re: STM32G0 Concurrency Question

Re: PWM Capture with EXTI Interrupts: Eliminating Noise Spikes

Re: PWM Capture with EXTI Interrupts: Eliminating Noise Spikes

Re: PWM Capture with EXTI Interrupts: Eliminating Noise Spikes

Re: No error from null pointers