STM32 MCUs Products

OC1M set active/inactive on match immediatly changes output

In the capture/compare ISR, I want to program the next CCR1 value and the associated action: to change the output to active or inactive when CNT matches CCR1. For this I need to set TIM1_CCMR1 OC1M to 0001 or 0010. However, as soon as I program OC1M ...

STM32F407 SPI uSD CARD Interfacing gives FR_NOT_READY and firmware hangs

Hello,I have been trying out interfacing the STM32F407 Discovery Kit with different sensors but while trying to Interface a SPI uSD card adaptor containing a 16GB microSD card, the interfacing doesn't seem to work out at all.I have followed all the d...

how to use ADC with DMA in HRTIM

i'm trying to take AD value with DMA when HRTIM TIMER A counter is equal to periodI tried using TIMER B and set to call interrupt when its counter is equal to period (TIMERA and TIMERB setting is equal)but when i checked with Oscilloscope it sh...

GPIO at Power-On briefly drives HIGH before it's initialized low [STM32H745]

Immediately after power-on, but before my main gets to initializing the GPIOs (HAL_GPIO_InitGPIOX->MODER = 1 // Output Push PullGPIOX->BSRR = 0 // Set Pin LowGPIOX->OTYPER = 10U // OutputGPIOX ->PUPDR = 2U // Pulldown)I see the pins (ex. PJ2,PJ3, etc...

STM32 HSE HSI selection

Hi : we notice both HSE or HSI could be used to supply system clock. what is the difference between these two options? and which one should we use in our product? and, for the power consumption, if we connect external crystal, then choose HSE ...

I have to record Air Conditioner noise and my speech at 16 kHz and 16-bit maximum. Then add both the signals . and want to remove the noise via comb filter using STM32 and plot PSD of each,I need the code to do it, help before 7 novemeber.

MPU region size [HAL] [L0]

In the firmware package L0 v1.12.0In the file "Drivers/STM32L0xx_HAL_Driver/Inc/stm32l0xx_hal_cortex.h"These are the region sizes defined:#define MPU_REGION_SIZE_32B ((uint8_t)0x04) #define MPU_REGION_SIZE_64B ((uint8_t)0x05) #defin...

Is there documentation on best practices for changing system clock configurations and voltage scaling when an STM32 MCU device is already running?

I am updating legacy firmware running on an STM32L151QEhx to the HAL libraries. Our current firmware changes the PLL (which supplies sysclk) configuration's multiplier and divider and the voltage scaling whenever a USB is connection is detected or te...