STM32 MCUs Products

STM32F4. Interrupt from DMA burst writing only once appears

MCU is STM32F405. I write data array to output pins using DMA mem to peripheral (DM2 stream6 channel0). Trigger is TIM1 CC1 event. Also I use DMA2 stream5 channel6 for write to TIM1 registers. Trigger is TIM1 UEV event. So the writing and interrupt D...

STM32F103C8 I2C module enters to busy state and cannot get out of it

Hello, I am trying to communicate with an SMBus battery. That has 2 sections so I am using 2 I2C modules. There was this problem: After the first I2C module makes a successful communication second module gets stuck. And it gets stuck in Busy. So I ch...

In stm32f407 when i tried to implement SPI communication (data send only) the OVR and RXNE bit is enabled what is the problem? and how to solve that

DAC in DMA not working?

dear all,I keep studing the STM32H7 architecture and this time I am trying to control a DAC using DMA which seems an easy task. However, in my case, the output is always at zero. I have used it without DMA and it works, therefore my HW debugging work...

new vs malloc - surprising results with IAR

Hello,Recently I started using c++ application with STM32, and I encounter a very strange behavior:It seems that after 1-3 calls to new() operator the new operator call get hang somewhere into assembly. When I try to step into the problematic new cal...

Using subseconds register on STM32F7 RTC

We have a driver for the RTC which I am trying to enhance with sub-second resolution.I am testing with a tight loop which is repeatedly reading the time. First I am reading the SSR register (which should 'lock' TR and DR?) then the TR, then DR (to 'u...

STM32H750 Timers

Hi,In one of my project I am using STM32H750 controller.I want to measure the pulse width which is an input to the controller whose width will be in some nanoseconds so I want to configure the timer in a way that it can support to start the count fro...

Use MCO for I2S clock(SCK)

Hello​I use STM32L100.I try to use the clock output from the MCO as the I2S clock.​STM32L100 is an I2S slave and outputs an external clock using MCO(24.5MHz).​Can it use without problems？​​Thank you.​

Updated version of the HAL driver related to the package STM32Cube FW_F7 V1.15.0.

Hello, I'm working with F746ZG Nucleo board with fw package STM32Cube FW_F7 V1.15.0. I seem that the included user manual UM1905 is not updated: C functions related to the CAN described in the document don't correspond to the function interfaces defi...