STM32 MCUs Products

Timer interrupt variation(TIM1) not exactly as configured, and hence PWM switching time variation

TIM1 is configured for complimentary PWM for three phase motor control.PWM switching frequency is 4khz i.e. 250us, but i am finding that PWM time is getting varied from 244us to 248us. sometimes 252us.Is it some calibration issue or what? Can anyone ...

STM32F103C8 What is CNT_INIT in General Purpose Timers?

HiFigure 120 in the reference manual RM0008 shows the control circuit in normal mode. It shows an update event using the Update Generation bit (UG). See attached figure.I am curious about the CNT_INIT bit, which is a pulse one clock cycle after the U...

PWM formula timer5 not work

I'm using STM32l152 and use TIM5_Ch2 for generate pwm .My target frquency pwm is 2.85 KHz .I using these parameter:clock frequency = 32MHz htim5.Init.Prescaler = 6;  htim5.Init.Period = 100; I measured pwm on oscilloscope and I measure 2.85KHz with 5...

How to debug DMA Peripheral to Peripheral Transfer? (Using an STM32 F1)

Hello, I'm trying to understand the peripheral to peripheral transfers. I'm pretty sure my setup is correct but it's not working and I don't think I understand enough to know what to look for to troubleshoot. For my test I simply have uart1 rx connec...

STM32F407 - HSE Bypass using external clock.

HiI wish to use an external clock into PH0 from an oscillator module already present in my design.Does this mean PH1 becomes a spare pin?ThanksAndy.

STM32H745 and SPI + DMA

Hi to all,I need to send on every TIM interrupt a packet stream to SPI1. I can't use the HAL_SPI_Transmit(...) because it is blocking....so I need to use the DMA but not in circular mode.I can not use the synchronization of DMA with lptim using DMAMU...

Problems displaying color STemWin on ILI9488 After loading the firmware into the microcontroller STM32F405RG, only black and white colors are displayed. How to fix it?

How to import Stmcube Mcu package examples code in atollic true studio? I want to run I2C communication between two nucleo STM32103RBx Boards How can I import it or I have to do it with STMCubeMx?

I have Run blinky code USART code with STMCUBEMx and atollic studio now I want to implement I2C communication between Nucleo boards. I searched And download stmcube MCU Package for STM32F1 series I have put it in the same workspace (same worksp...

sleep when pressing a button on keypad

My target is :my device when the main run is OFF = SLEEPThen its right this code ?When i pressed for a time > 300 mses button (OFF/on ) my device must wakeup , my button il connected to pin wakeup this is my code Which timer and i must use for t...