About AFahr.1

AFahr.1 · 2022-06-15

Hi ST Community.A colleague and I were having issues on an STM32L4, in that the CSS detects an LSE failure and swaps to the LSI.We looked at Errata ES00335 - Rev 15 and it confirms what we see that the LSI becomes unstable. We're looking for a workar...

AFahr.1 · 2021-06-15

Hello, I'm running into a bit of trouble updating firmware using DFU. This would not be such a big deal, apart from the fact that sometimes an upgrade needs to be made without the ST-Link tool.First of all, entering DFU mode and re-flashing the firmw...

AFahr.1 · 2021-06-14

Hi all,As stated above, I can't seem to wake up the controller from STOP2 mode using WFE with the ALARM A. Here's my alarm and EXTI settings:if(EXTI->PR1 & EXTI_PR1_PIF18) { EXTI->PR1 |= EXTI_PR1_PIF18; ///< Clear pending interrupt if necessary } EX...

AFahr.1 · 2021-06-14

Hi all,I have a function that prints out on a prompt the current RTC Date and Time values from the RTC module... basicaly when it's called it goes like this:RTC_TimeTypeDef rmi_time = {0}; RTC_DateTypeDef rmi_date = {0}; HAL_RTC_GetTime(&hrtc, &rmi...

AFahr.1 · 2021-06-09

Hello,I'm trying to update a micro over DFU (USB) mode since we don't always have access to the STlink programmer.I managed to start the unit in System Memory mode by reading a backup register at startup and jumping to system firmware if it's a certa...

AFahr.1 · 2022-06-16

Thanks JW, I was hoping there'd be more of an explanation from ST, but I supposed that would be giving away their secret sauce.One thought was to actually get rid of the LSECSS as well, that interrupt is not helping at all. Since we're running a time...

AFahr.1 · 2021-07-05

So, here's an update on what was happening, in case anyone ever encounters the issue. It's not solved 100% yet, but enough for me to get it working. I will add no code, but I will try to explain as best I can.At Power Up, the system initialises the c...

AFahr.1 · 2021-06-29

I haven't had much progress on this, having had to look at other issues, however, this is still in the back of my mind.Is there a way for ST programmers to add an "Exit DFU Mode and Reset chip" button on the STM32 Programmer? I find myself in the sit...

AFahr.1 · 2021-06-26

Should be straightforward...Read the time with HAL_RTC_GetTime (I believe that is the function) and add 5 minutes to your current minutes value. If it's > 60, add 1 to the hour value and the rest to the minute value. Set the alarm with the new values...

AFahr.1 · 2021-06-22

Sorry, in your sentence above it's not clear which is on or off? You mention 'on' twice. Do you power your board with the USB port?Maybe it has to do with the fact that you are using VBUS sense and I'm not. I'm only using the pin as GPIO to sense the...

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