STM32 MCUs Products

Ask questions, find answers, and share insights on STM32 products and their technical features.

cancel
Showing results for 
Search instead for 
Did you mean: 

Forum Posts

GPIO interrupt triggered incorrectly

I am using micro switches in my system with the GPIO EXTI. I would like to detect only the press of the switch, but the interrupt was triggered on both press and release of the switch. The interrupts were even triggered twice on each press and releas...

hchienti_0-1714113986504.png
hchienti by Associate II
  • 3358 Views
  • 6 replies
  • 0 kudos

Nfc01a1 wont work properly

Hello everyone, I am new to the world of STM32 and am trying to get a bit familiar with the topic. Unfortunately, I'm stuck with the code to read the UID from an NFC tag. The code itself has no errors and is uploaded to the microcontroller. Unfortuna...

Tamti by Associate
  • 981 Views
  • 0 replies
  • 0 kudos

Resolved! STM32H745BI SPI port does not start

I am trying to get a SPI port up and running on an STM32H745BI chip but after configuring the port and starting the transmission I never see any signals on the pins and the port never gets an End Of Transmission (EOT) high signal. Startup code is lis...

ews by Associate II
  • 2254 Views
  • 2 replies
  • 0 kudos

STM32F103CBT6 not recognized USB device

It is not recognized as a USB device. What did I do wrong or miss?IC: STM32F103CBT6 1. Is the distance between USB D+ and PA12 (Pin 33) and USB D- and PA11 (Pin 32) long?The distance from USB D+ to PA12 and USB D- to PA11 is approximately 35 mm (1,38...

CXR_0-1713470218159.png CXR_1-1713470237176.png CXR_2-1713470250179.png CXR_3-1713470264226.png
CXR by Associate II
  • 2055 Views
  • 3 replies
  • 0 kudos

G431 - Investigating ADC behaviour depending on clock source

Hi,i am trying to investigate the behaviour of the ADC when measuring a value, where the ADC is triggered from a timer source.In the manual it states, that when the ADC is clocked from SYSCLK or PLL "P", then it would be faster, but when clocked from...

Tobe by Senior III
  • 2740 Views
  • 1 replies
  • 0 kudos

CAN Bus doesn't work in normal mode between two MCUs

Hello,Hope you all doing well..!! I am using two microcontrollers i.e., for transmitting data I have to use STM32F407VET6 and for receiving I have to use STM32F407VGT6 also I have to connect MCP2551 CAN Transceiver. I am transmitting data from one bo...

mr_vineet by Associate II
  • 14598 Views
  • 22 replies
  • 9 kudos

SD card doesn't work with stm32L552ZET6

Hello everyone,I have been using for a long time the stm32L496ZGT6 in a customized PCB with an uSD card module. Never had any problem interfacing the card. Due to the shortage of supply during the pandemic situation I bought a couple of stm32L552ZET6...

tarm123_2-1700225538973.png tarm123_3-1700225605219.png tarm123_4-1700225637176.png tarm123_0-1700225232010.png
tarm123 by Associate
  • 2313 Views
  • 2 replies
  • 0 kudos

Resolved! I can't blink my leds in H755ZI Nucleo board

I bought a NUCLEO H755ZI board, but I can't make the LED connected to GPIOB pin 14 blink, neither with CMSIS nor with HAL, I saw some tutorials and questions here, but nothing solved it, thank you in advance for your help.

Resolved! STM32H7 QSPI Errata

Hi, we see STM32H7 has Qspi errata as below: But we are not sure where to apply the patch exactly. It says "upon reset and upon switching from memory-mapped", mean in reset function, right after or before "HAL_QSPI_Init"?      

DatTran_0-1714074330817.png
Dat Tran by Senior II
  • 2907 Views
  • 5 replies
  • 2 kudos