LOW POWER RUN MODE?
Posted on July 12, 2018 at 10:35I am beginner in stm32 i have configured 3 external interrupt and rtc alarm ,lptimerhow to enter the low power run mode.exit when one of the interrupt signal received and rtc alaram
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Forum Posts
Why is LSE limited to 1MHz?
Posted on July 09, 2018 at 18:19Hi everyone,going through the datasheets of STM32L4x1 processors (probably concerns further processors as well) I found that LSE is always limited to 1MHz but my question is what limits it, i.e. can I use LSE > 1MHz i...
STM32F103VCT6 USB Communication Port disconnection Problem Sometimes.
Posted on July 12, 2018 at 08:48Hi,I am using STM32F103VCT6 for my project and I have Polling the data packets from Uc for every 200 milliseconds and send to PC,Sometimes USB Communication is disconnected.when I debugging and find that Transmit stat...
Can FMC of STM32H7 have dram and sram enabled at the same time
Posted on July 11, 2018 at 08:38Dear Community,Reading the datasheet and reference manual of the STM32H7 I am left wondering whether if it is possible to have both the DRAM and NOR/SRAM controllers of the FMC controller active at the same time?The m...
STM32L451 strange RTC issue
Posted on July 11, 2018 at 17:03I'm curious if anyone else has seen this issue.We are using 20 ppm LSE at 32768hz as the clock source for our RTC. Over an 8 hour period, we are a few seconds off vs. the expected max of .6 S for the 20 ppm.Our syste...
4 bit SDIO doesn't work although 1 bit SDIO works SDCARD
Posted on January 18, 2018 at 14:37 Hey everyone, I have a quick question concerning the 4 bit sdio sdcard implementation. The 1 bit sdio seems to work perfectly. I have absolutely no issues, although when implementing 4 bit it completely bugs ou...
Question regarding hardware state and debug in stop mode
Posted on July 11, 2018 at 01:56Hi,I am currently writing a program for the part STM32L031F6. I am using StopMode to put the uController to sleep.I have a couple of questions I was wonder if you could help.1. When waking up from stop mode, do I nee...
HAL_SPI_Transmit/HAL_SPI_TransmitReceive timeout
Posted on July 11, 2018 at 20:13Hi,I used to have the SPI1 working connected to MAX31865 breakout board. For some reason it's not working at all now. I traced into the code, seems HAL_SPI_Transmit() failed on __HAL_SPI_GET_FLAG(hspi, SPI_FLAG_TXE) u...
Trouble entering STOP2 on stm32l432
Posted on July 09, 2018 at 15:06I'm having trouble entering stop2 -- instead of going to stop2 my code seems to enter sleep; this is based upon measuring power levels -- I have the RTC fed by an external crystal and a 1 second interval alarm. I can...
VBAT for RTC backup
Posted on October 10, 2016 at 13:12Hello, should i connect 3V battery to Vss or Vssa for RTC backup (external 32768 resonator)? #too-vague #stm32-vbat-rtc
