STM32 MCUs Products

Different ways(syntax) to write resgisters in Keil IDE

Hi all, i saw someone use a different way to write instructions in keil IDE , where they would write something similar to what i tried to do in the photo.i usually would write which workis just fine , any ideas how to write what im trying to ?

Write data to flash when power supply drops

Hello,I am using a STM32G473VET6 on my board, and I want to save a few data bytes in Flash when the 24V power supply drops. I have more than 400ms available between the detection by the MCU and the 3.3V dropping. When the ADC triggers this event, the...

SD Bus speed mode

Hello,as I see at the AN5200 only in DS and HS the signal level is 3.3V.Does it mean that the IO signal level in SDR50 for example will be 1.8V on the host side?The MCU has internal LDO for it ?Or the host size is always 3.3V, and the signal voltage ...

ADC DMA Double / Multiple Buffer Example

Hello,I was searching in every STM32 CubeMX pack examples for ADC DMA with Double / Multiple Buffering. But I found nothing.I found in dma_ex hal file the functions like HAL_DMAEx_MultiBufferStart (or HAL_DMAEx_MultiBufferStart_IT), but they aren't u...

Long i2c writes > 255 bytes using DMA using I2C_CR2_RELOAD flag gives address in continuation data

I want to do i2c writes > 255 bytes using DMA with an STM32L451, but fail to use the  I2C_CR2_RELOAD flag properly it seems.I end up with an address byte when the transmission continues.How should it be done using the raw register defines.Currently I...

Does main() require an infinite loop?

This page says:"With a custom main() on Arduino, do not return from main(). As there is no operating system running on a standard Arduino, there is no where to return to. If you do return, abort() is called, then exit(). On the AVR-8 MCU ( Uno, Mega ...

[STM32H7 QSPI] Should I expect interrupt after indirect mode read with instruction only?

Question is about QSPI in stm32H743.It seems that indirect read mode and indirect write mode should behave the same if it sends only the instruction and the data is absent.But I don't receive interrupts in case of indirect mode read without data, whi...

what is the expected release date for 256 and 512 KB STM32G0x1 ? I would like to use STM32G0B1CC for a new project

Let the LED flash 3 times without using a blocking code

The point is that when you press a button, an LED should flash three times.If you press the button again while it is flashing, the LED must flash 3 times again.The whole thing should be implemented without blocking code.I could could use a loop to ma...