STM32 MCUs Products

Use RTC counter to realize the function of time keeping, but the error is very big

Background: The MCU chip I use is stm32L476RG. Since the MCU usually needs to work in the standby mode and will wake up within 2s, I want to count the time the MCU is in the standby mode each time. Implementation method: The clock source of RT...

I have interrupt lockup problems. STM32F423ZHT6. Bare metal assembly. Despair. SOLVED.

update (a week later, after a vacation to clear head):This was solved by changing the entry in the vector table from ".word timer7"to ".word timer7+1". The +1 is to set bit 1 of the handler address to signal that it is a 16 bit thumb instruction. ...

STM32F405 SD DMA only works once, no matter what

Hello,I am currently trying to get an Adafruit Feather STM32F405 board to write to files on an SD card using DMA. I'm using CubeIDE, not STM32duino, and I have tried DMA configurations with both a single stream and two streams (one RX and one TX). No...

STM32H743 PWM

hello friends)))) I bought a new stm32H743 for familiarization and got confused how to implement PWM on HRTIM. I'm trying to do PWM on timer B. configured GPIO_PC8 to AF1 in GPIOx_AFRH. everything is fine there.HRTIM_B_PERxR==2000 HRTIM_B_CMP1xR==200...

I can read from any ADC port and output a reasonable value by changing the MX_ADC1 init code but I can't work out how to change the channel once the code is running. Is there an app note or firmware example showing how to change ADC channels? Thanks

Firmware Behaviour change after files clean up

I am working on a state machine to control a stm32f334 mcu, first state would be general initialization, the wifi initialization, waiting for stable input and some other states that are not relevant here. It was working smoothly and I wanted to commi...

STM32G491 (Flash category 4): Flash IAP programming?

Hi, I would like to re-program only some higher part of flash memory with In-Application-Programming (Chip: STM32G491 - this in RefMan is defined as "Flash category 4" device).My normal firmware e. g. is running in lower 256kB Flash.And now I want to...

STM32F439ZI first embedded flash program issue

Hi,I'm working with STM32F439ZI MCU. I setted system clock 180 MHz and as Reference Manual (RM0090) says I did:-- VOS[1:0] = 0x11-- over drive mode enabling-- 5 WS latency (6 CPU cycles)When I try to program something the first time after power up, i...

The issue with STM32H745 SPI with DMA communication with two boards.

Hello Support Team,Please find the below issue description along with the attached code. Please suggest how we can fix this issue. I have developed the SPI with DMA code for STM32H745-DISC (Discovery board). I have flashed master code on the first bo...