STM32 MCUs Products

No matter how long the power on reset time is, the MCU can not start normally. The reset button must be pressed manually once to start. Why？

Invalid voltage level on STM32H743 at reset

I'm using several Nucleo-H743ZI boards. At reset (reset handler) the bit ACTVOSRDY in PWR_CSR1 is 1 on one board and 0 on the other. 0 means "voltage level invalid, above or below current VOS". The current VOS is of course the default one at reset, i...

How to use DMA to change PWM frequency?

hi guys. I want to use DMA to change the PWM frequency in the pwm running. I used DMA to change the ARR of Tim, but it was failed. So how to change the pwm frequency by DMA?

STM32L476 development board: starting point

Hi,I bought a STM32L476 board. I started with the demo available in keil uVision and it worked fine easily, but it is closed, you cannot modify anything.My question is: may I follow the MOOC with this board? instructions require a different specific ...

STM32L4 workshop

Does anyone have the files or materials used in the MOOC STM32L4 workshop by any chance?thanks.https://www.st.com/content/st_com/en/support/learning/stm32-education/stm32-moocs/stm32l4-hands-on-workshop.html

Cannot access SD cards larger than 8G

I made a small wav-music player with a STM32L452. Reads data from SD card via SD 1 bit mode, and plays it over the DAC. Homemade jukebox, fun little project.My problem is: while all the small cards (up to 8 gig) I tested are o.k, larger cards do not ...

STM32F30x DMA configuration

I'm implementing two channels of DMA in my STM32F302x using Timer 2 in input capture mode. Do I really need the HAL_DMA_RegisterCallback callback function? I'm using DMA interrupt mode so each channel has a DMA1_Channelx_IRQHandler that performs the ...

Hello , I am testing a Waste Bin Detector GPRS. Specification description: MCU - STM32, 32bit ARM® core controller Radio- GSM/GPRS Module SIM800C I have a problem with signal receiving information - Detector sent information in Dec numbers.

I need to receive signal information in percentage %.How can I convert/change received information ?Thank you

STM32F3 Comparator Interrupt not Generating

HI All,I Have the STM32F302R8. I am using comparator 2. What I want to do is have DACH1 feed a value to the inverting input and have PA7 connected to the non inverting input. For now, I am just wanting to generate an interrupt to get things working ...