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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 ...

YYada.1 by Associate
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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...

Cnnon.1 by Associate
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Resolved! Receive multiple bytes of data using USART1_IRQHandler ().

Hello Community,I am new to ST MCUs.I want to receive multiple bytes of dat over UART. The size of the data can vary. So I want to use USART1_IRQHandler() when data is received by MCU over UART.I am able to get the interrupt correctly, But I can get ...

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...

AAbed.1 by Associate III
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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,...

DU2 by Associate II
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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 ...

IFaye.1 by Associate II
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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...

VChav.19 by Associate II
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