About JY.1

JY.1 · 2021-02-05

Hi,I am using STM32G474 Nucleo board and try to use TIM1_CC_IRQHandler. I am using TIM1_UP_TIM16_IRQHandler to check certain conditions and then I'll enable the CC1IE bit in TIM1->DIER register.I configured TIM1 as Center-aligned PWM mode.However, I ...

JY.1 · 2021-01-29

Hi,I'm using STM32G474 and trying to understand how COMP1 output blanking should be setup. From the reference manual, it can be set by using TIM1_OC5, but I didn't find anywhere mentioning how can i configure the length of the blanking period.Any tip...

JY.1 · 2020-12-29

void TIM1_UP_TIM16_IRQHandler (void) { volatile uint8_t t; uint32_t sr; sr = TIM1->SR; sr &= ~TIM_SR_UIF; gpio_set(TIM1_PORT, TIM1_PIN); gpio_clr(TIM1_PORT, TIM1_PIN); TIM1->SR = sr; while (TIM1->SR & TIM_SR_UIF); }Above i...

JY.1 · 2021-02-05

Resolved:Thanks for the heads-up above.So I figured out that there are two steps to solve my problem. First is that I need to clear CCxIF flag before I enable CCxIE so that it won't be set immediately after I enable it. Second is that CMS in TIM1->CR...

JY.1 · 2021-02-05

Update 2:I noticed that compare only happens at a certain direction when CNT matches CCR1, but not the other direction. Again, my TIM1 is set to be Center-aligned and up/down counting. Is there anywhere that mentioned this kind of behavior of capture...

JY.1 · 2021-02-05

Update:So I tried to clear the CC1IF flag "before" I enable CC1IE, (although that the flag did NOT show to be set in the debugger) and this sporadic interrupt did not happen. However, I did not see interrupt generated when the very next Capture/Compa...

JY.1 · 2021-02-05

Hi Amel,I found that example but the TIM configuration was using upcounting as Edge-aligned. Is there any other example that does the same output blanking but Center-aligned instead? ThanksJY

JY.1 · 2020-12-30

Thanks for sharing the website and I find it very informative regarding all the gimmicks of STM32. And the example I provided was just a way to see if that indeed writing to SR was delayed and thus causing the issue. Obviously it is generally not a g...

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STM32G4 TIM1 CC (Capture/Compare) Interrupt happened immediately when it is enabled. How to prevent this from happening?

STM32G4 Comparator (COMP1) Blanking Pulse Width (using TIM1_OC5)

STM32G474 TIM1 Update Event Triggered Twice In a Row and Channels Enable Was Delayed

Re: STM32G4 TIM1 CC (Capture/Compare) Interrupt happened immediately when it is enabled. How to prevent this from happening?

Re: STM32G4 TIM1 CC (Capture/Compare) Interrupt happened immediately when it is enabled. How to prevent this from happening?

Re: STM32G4 TIM1 CC (Capture/Compare) Interrupt happened immediately when it is enabled. How to prevent this from happening?

Re: STM32G4 Comparator (COMP1) Blanking Pulse Width (using TIM1_OC5)

Re: STM32G474 TIM1 Update Event Triggered Twice In a Row and Channels Enable Was Delayed