STM32 MCUs Embedded software

STM32L151 Problem do not run some function after wake up

Hi Community, my application use FreeRTOS work fine when i did not use PWR_EnterSTANDBYMode. The problem is the program did not run some function like skip function after wake up, For instance: usart2_init, delay.. when I debug and put the break poin...

Using low power with USB interface

Hi I am using the stm32L433 and installed the USB VCP library from CubeMX . I used the HAL as looked like a lot of code for doing it from scratch with registers. Anyway, I have a low power project running on batteries and the USB interface wont be ...

Resolved! High Current Consumption in Stop2 mode STM32L4

I am trying to achieve the lowest power consumption possible when entering Stop2 mode with the STM32L476. I have verified that all of my GPIO are in the correct state before entering Stop2 mode. I am also very confident that it is not any external ci...

Resolved! RTC IRQ STM32L476

With the STM32 in stop mode 2, is it possible to use the RTC as a additional low power timer?I mean to trig IRQ periodically.I tried the PWR_STANDBY_RTC STM32Cube_FW_L4_V1.14.0 example for STM32L476 and the code never stop at the breakpoint in functi...

Is there a way to determine what event woke us up out of Stop mode (STM32F042K6)?

On a STM32F042K6 (using the latest CubeMX software and FW_F0 V1.9.0), we have code that goes into "Stop" mode to achieve low power. A pin connected to PA0 (EXTI0) wakes us up.This all works great. Except that we can get the system into a state wher...

I am using STm32f429 MCu . working on some application where it need to wake up the mcu from Standby mode from USB_OTG_FS . Please any one can advice where do i start from

stm32f105: cannot wake up from Stop Mode if calling in Interrupt

Hey guys,I've encountered a strange problem using stm32f105 Stop Mode. Simply put:if PWR_EnterSTOPMode is called in the whie(1) main loop, then everything goes very well, both EXTI and RTC alarm can wake up MCU from Stop Mode.However, if PWR_EnterSTO...

Resolved! STM32CubeL4 low power mode STOP2 with RTC

Hi, I'm using latest FW STM32Cube_FW_L4_V1.13.0 and the PWR_STOP2_RTC example seems to fail waking from sleep mode. It goes to sleep after 5 s alright and power consumption drops from cca 11 mA to 4 uA but after cca 33 s, as stated in readme, nothing...

stm32F4 BACKUP SRAM and USB HID conflict

Posted on November 25, 2014 at 15:37Hi, usb hid works form me great on discovery f4 but I have a problem with saving to backup sram and backup rtc after USB initialization. I would like to create a program, which is waiting for character from the US...

STM32F765 : default configuration for Wake up pin

Hello,I use PA2 pin to wake up from standby mode with a STM32F765 MCU.I am a bit confused because it is wrotten in HAL Manual (UM1905) at the page 607 : This pin is forced in input pull-down configuration and is active on rising edges.If i let the pi...