STM32 MCUs Products

I need some help on why undefined exception occurred or code crashes when i flash and run blinky app on nucleo-l552ze ?

I am working on porting Mynewt RTOS on nucleo-l55ze (Cortex-m33) board,and able to build blinky and load.but led will blink only once and observed the issue that is unhandled interrupt/exception generated while context switching between main task to ...

how to filter noise in adc input stm32?

hello, i am working with a stm32f407 discovery and a current sensor acs712 / 20A , the adc of the card hold input from 0 to 3.3v and the sensor presents an output from 0 to 5v so i have added a voltage divider with two resistors of 2.2k and 3.3k, whe...

OLED interface with Rotary encoder

Hi ;I have worked with STM32F429i to generate square signal with various frequency. The value of frequency can be shown on OLED SSD1306. I configured I2C1 to connect with this display.When I connect just Rotary encoder, i can see the change of freque...

Multi channel ADC: am I sensing right?

Hello, I am using L031K6 with its board​I am trying to sense multi- adc port. One is ADC 1 channel 3, other one is ADC1 channel 7​I open example code of ADC_DMA and overwrite it, for making my MCU sense these ADC channels, CH 3 & CH 7​but problem is,...

I Always have nan and -nan values on MFCC output

Hello Everyone,I try to extract MFccColumn from my microphones plug on stm32h7. But when I put my buffer output audio on my function for extracting the mfcc I always get nan or -nan on pOutColBuffer[NUM_MELS]. Does someone have idea? Thanks,Here the ...

Hidden Flash in STM32L431KB?

According to the datasheet the STM32L431KB has 128kb of memory. I forgot about this fact and in my linker script I added another section after  0x08020000 of 6 KB long. After debugging and testing my code I am sure that I can read/write on flash abov...

High precision 1Hz resolution Timer on STM32F030K6T6

Hello,I know that it is possible to cross series two timers to achieve high resolution one. In my case, 32bit resolution is enough. As a result, I would use TIM1 and TIM3 in STM32F030K6T6 to reach desired high resolution frequency generator. Unfortun...

STM32H747XIH6 I would like to know how long the delivery period is when I purchase the above product from ST homepage. The order quantity is 12EA. I want to know how long it takes to get to Korea.

Usart idle interrupt question

Hello,When I enable usart idle interrupt function on stm32g071rb, it fires the interrupt immediately even there is no communication on the bus.I debug use cubeide and IAR. The results are the same.When UE bit in USART_CR1set to 1, the IDLE bit in USA...