About StephanMair

StephanMair · 2022-02-07

Hi, our hardware engineer kinda messed up and I'm forced to use an onboard STM32C8T6 and lowball it as a UART "relay", basically UART1 reads whatever that's putting in with likely a buffer of 32 bytes, and immediately sends them out over UART3.The du...

StephanMair · 2021-07-01

Hi, I'm using STM32L431xx series mcus and I want to perform a read on the RTC time.Normally I would do that with a simple read operation on registers, specifically, the RTC_TR and RTC_DR register, but I am afraid that's not how things were supposed t...

StephanMair · 2021-06-30

I'm using STM32L431xx series mcus and as with most STM32 mcus, it has an RTC feature with calendar. The RTC has a calibration function by which you can fine-tune the counting scheme of the RTC and improve upon the accuracy of your clock source.This...

StephanMair · 2021-06-28

I'm using the STM32L431xx mcu. The current hardware configuration of our design has no external clock source (crystal), so we are using the internal one. And there's a new functionality which demands second-accurate real time clock, over a period of...

StephanMair · 2021-06-10

Hi, I'm using STM32WB55x series mcu, I wanna know how I should configure/change the relevant priority for the TIM2?In the old days we use this:void NVIC_Configuration(void) { NVIC_InitTypeDef NVIC_InitStructure; NVIC_PriorityGroupConfig(NVI...

StephanMair · 2022-02-07

While we are at it... how does one do the interrupt handler thing? Do you have to register it at the initialization for the Rx UART or you just have to implement certain handler in the stm32f103x_it.c and enable the relevant interrupt? I'm guessing b...

StephanMair · 2022-02-07

Good thinking. I'll probably go with it since simple solutions often times are the best.

StephanMair · 2022-02-07

Sorry, can't believe I missed the 103 part.And in reality, I'm using STM32RET6. Just confirmed. My apologies.

StephanMair · 2021-07-01

Thank you. This is the best answer.

StephanMair · 2021-07-01

Hi thank you for your reply, much appreciated.We are not planning on use it for "precision" work, just a rough estimate of how many time had passed.

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Questions regarding using STM32 as a UART "relay"

"PROPER" way to read RTC time?

The caliberation for RTC is one of those "nice to have" feature, not exactly something you should count on right? Should you use it and hope for a meaningful result?

RTC inaccuracy induced by internal clock source?

How do I change the priorities for the TIM2?

Re: Questions regarding using STM32 as a UART "relay"

Re: Questions regarding using STM32 as a UART "relay"

Re: Questions regarding using STM32 as a UART "relay"

Re: The caliberation for RTC is one of those "nice to have" feature, not exactly something you should count on right? Should you use it and hope for a meaningful result?

Re: The caliberation for RTC is one of those "nice to have" feature, not exactly something you should count on right? Should you use it and hope for a meaningful result?