STM32 MCUs Products

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...

My STM32 locks up when I try to access a memory mapped external RAM. Cannot be reprogrammed.

I have a custom PCB with a STM32H7A3ZI MCU, and a S27KL0642S27KS0642 Hyperbus RAM.My code, as well as the app note (AN5050) I'm following sets up the RAM for memory mapped access.I've checked and rechecked the pinout and configuration, but every time...

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...

STWINK1B connection to a different cloud-based MQTT broker

Is it possible to connect the STWINK1B to a different cloud-based MQTT broker (personal AWS account for example)? If so, can you advise on how this can be done?Is it possible to attach the STWINK1B on the nRF Cloud which is also on AWS?Finally, is it...

How ADC Works Without GPIO Pins ?

Hi All,I am working on ADC with multiple channels Interrupt method using NUCLEO -L4R5ZI- P(STM32L4R5ZITxP). ADC working for all channels irrespective of GPIO Pins.for example, I Commented GPIOA( Port A and its clock) highlighted in bold color even th...

DMA for controlling GPIO output is not working on STM32H7 devices

I am trying to use DMA to control GPIO port E output.Below is configuration of CubeMXIn Cortex-M4 context of dual core , DMA is successfully working to toggle GPIO Port E output .But In Cortex-M7 context of dual core , although error message, DMA ...