STM32 MCUs Products

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Forum Posts

How many GPIO interrupt latency cycles from edge to IRQ?

I know the latency of Cortex M3/M4 of interrupt is 12 cycle, I got a scenario that interrupt and DMA use same trigger edge from external. Before the DMA starts transfering, I wanna ensure that CPU will not change the data. so the IRQ must be set to m...

0693W000000VKUhQAO.jpg 0693W000000VKUrQAO.png

Resolved! STM32L476Disco and USART1

Hello guys. Can anybody explain me how to use USART1 in STM32L476Disco?I mean that PA9 and PA10 did not soldered, but page 27 of user manual has info about COM1 and COM2 on these pins. And of course I have removed display from a slot, and tried all p...

AKarp.1 by Associate II
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  • 4 replies
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Resolved! Controller reset every 500 ms periodically

I am working on stm32f429 and micro controller reset every 500 ms, iwdg is not active but, it seems, it is activated by hardware or something which force cpu reset. How can i get rid of this?Please help, BR,

MHaji.1 by Senior
  • 754 Views
  • 3 replies
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Resolved! Stm32 mat target UART example USART_3_Receive_Send, difficulty

I have generated MDK-ARM project from the USART_3_Receive_Send example from stm32 mat target example, I have successfully compiled all and burned to stm32f103 board, when connected to terminal it finds, it is sending unknown chartacters to terminalI ...

vlal by Associate III
  • 3446 Views
  • 17 replies
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Resolved! Problem about APB1 Clock Configuration for Timer

Hi Everyone ! I have a problem for calculating timer for 1ms. I attached configuration for clock and timer.As I understand Timer2 uses APB1 Clock Bus but for timer it will be APB1x2 if APB1 prescaler is not " 1 "So when I use Prescaler 59999 for 60Mh...

CTR.1 by Associate II
  • 2332 Views
  • 6 replies
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interrupt latency with 2 two Identical board

Hi, I am using two Identical board, both board installed with a STM32F733ZE, and both have the same program loaded.The program is very simple where if an interrupt from PG0, will reset the PWM counter of TIM8. provided with the same interrupt source,...

Wleon.1 by Associate II
  • 635 Views
  • 4 replies
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About STM32L4 ADC and SD interface problem

I have nucleo-64 STM32L476 board. I have initialised ADC. I am able to read all the three channels ( that I configured in cube Mx) correctly using DMA.Then I added SD interface. I was able to read and write in the SD Card as well. But as soon as I in...

HMaje.1 by Associate III
  • 1664 Views
  • 9 replies
  • 0 kudos