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Forum Posts

Troubles enabling the 32.786kHz RTC clock.

Hi all,I am working with a Nucleo STM32L452RE board and I had a bit of trouble enabling the RTC clock. I am just trying to get a scope shot of the waveform output by the clock itself and I noticed it was not on by default. I attempted to use a few ex...

KMill.3 by Associate II
  • 4274 Views
  • 3 replies
  • 0 kudos

32F413: Can I Remove Power from VDDA Pin During Shutdown?

I am chasing reason the for last 4 mA of current that my 32F413 microcontroller draws during low current shutdown. By "shutdown" I mean sleep mode where my system is powered from a small battery with short life.A really good engineer would have equi...

JOlso.12 by Associate III
  • 1420 Views
  • 1 replies
  • 0 kudos

Bidirectional Line Termination - will just one resistor work?

I am designing a PCB for an ST micro MCU with external SDRAM.On the demo board, ST is using one series resistor termination for the bidirectional data lines. ST places this resistor at about 30/70% split of line length, where the resistor is 30 % of ...

MColl.3 by Associate II
  • 3172 Views
  • 2 replies
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STM32L431 ADC initialization problem

Hi. I have a problem with ADC on a custom board with STM32L431CBY with external 24 MHz clock. Everything (UART, SPI, DAC e.t.c.) works fine except ADC. Clock initialization:static void setSystemClock(void) { LL_FLASH_SetLatency(LL_FLASH_LATENCY_...

KGrib.1 by Associate
  • 1177 Views
  • 1 replies
  • 0 kudos

HAL_I2C_Master_Receive_DMA not returning updated values.

Hi,I am using one I2C based peripherals with Interrupt enabled.While using "HAL_I2C_Master_Transmit" and "HAL_I2C_Master_Receive", it seems to work properly with ISR.But, when I am using the following I2C_DMA:HAL_I2C_Master_Receive_DMA(&hi2c4, MPU_DE...

AKuma.33 by Associate II
  • 2670 Views
  • 4 replies
  • 0 kudos

STM32F107 Quadrature encoder

Hello,Regarding this post I am able to read my encoder value correctly. // STM32 TIM3 Encoder Decoder (PC.06:A PC.07:B) VLDiscovery - sourcer32@gmail.com #include ''stm32F10x.h'' #include ''STM32vldiscovery.h'' /**********************...

JJohn.3 by Associate II
  • 1186 Views
  • 1 replies
  • 0 kudos
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