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STM32F7 RTC Accuracy/Calibration Methods?

Hello Everyone, I am using the STM32F777 and utilizing its RTC and external 32.768 crystal(LSE).Currently I am having a drift of 79s in 76 hours. it is a little bit less than a second per hour. It is not that bad but I would like to have a better res...

Mauricio by • Associate II
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  • 1 replies
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Unstable Current Consumption in Low Power Mode

Greetings From Turkey, We have a hardware using stm32l471. We wake up at certain times and send data to the server. Then we go back to sleep mode.Here is the our callback to switch to low power consumption mode.void low_power_callback (int time) { s...

VÜnal.1 by • Associate II
  • 694 Views
  • 2 replies
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Resolved! Preserve a section of FLASH memory during programming

Following in the directions of this post, I am able to reserve and write to (and read back) from a section of FLASH dedicated to calibration data. However, when I reprogram the device, the IDE wipes the whole memory clean before programming and we lo...

JMill.1 by • Associate III
  • 2756 Views
  • 3 replies
  • 0 kudos

Resolved! NUCLEO-H743ZI2 ADC Polling gives wrong result.

Hello,I am trying to read single ADC channel using NUCLEO-H743ZI2 board but the result is wrong. I have created a very simple project using CubeMX. Kept the default Clock setting. Enabled ADC3 CH0 (PC3_C Pint) in single ended mode polling. Enabled UA...

ABane.1 by • Associate III
  • 1161 Views
  • 7 replies
  • 0 kudos

Resolved! STM32H750 ignores pull-up resistor when EXTI is selected

On F1xx and F4xx platforms, I have been using the GPIO pull-up resistors for the connections to OC hall sensors used in BLDC motors. There has never been a problem. With STM32H750, I can see that the PUPDR register has the right values for the pull...

olavi by • Associate III
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  • 7 replies
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Resolved! What is "LSE drive"?

I'm trying to figure out the battery consumption of an STM32F746. Accodring to the datasheet, that depends on SRAM state, RCC state, and if the LSE is in low, medium low, medium high, or high drive.I have no idea what these kinds of drives are, nor ...

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