STM32 MCUs Products

Hi, I am using NUCLEO-64 STM32F401 and I have attached a serial EEPROM to I2C3. I am using the LL library calls to try to write to the EEPROM but I cant get the slave address to appear on the I2C bus. I do see the start pulse on the scope. Code below.

The code below gets stuck at --- while (!txBytes) txBytes=LL_I2C_IsActiveFlag_ADDR(I2C3);and the ADDR bit never gets read as set?==========================================void I2C_Write(uint8_t dataCount, uint8_t data){ uint8_t I2CAddrWrite = 0xa0;...

Program gets stuck in for loop after interrupt runs

This has me scratching my head - my program runs fine UNLESS the interrupt occurs, after which it gets stuck in a for loop near the start of the program. I can't see any way these two things are connected with each other - there dont share variables....

SPI communication between f030R8 (slave) and ESP32 (master)

HelloI am trying to setup SPI communication between an ESP32 as Master (programmed with arduino ide) and an f030R8 programmed with the Cube IDE. The stm is reading analog values from its adc pin in the main loop and should transmit them to the master...

STM32L4R5ZI - Is it possible to erase a page and write a double word in Flash ?

Hi,I am using STM32L4R5ZI MCU (Nucleo kit). My application demands non-volatile storage of few configuration parameters. I am using 2 banks mode. I want to store a double word at location 0x8100000 which is first page of bank 2. I tried the STM32L4R5...

STM32F427 is sometimes running slow after boot

I have an issue with STM32F427 where after doing reset for MCU in some cases the MCU is running at about half the speed after reset. All peripheral clock seem to be running at normal speed, but the MCU is just running at half the speed. All register ...

Can't get expected results working with external memory with I2C

Hello people from ST community, I'm here today talking about I2C, starting to working on it and wanted to see if I could fix an issue telling you my experience with an external EERAM memory, the 47L16 EERAM from Microchip. My board is a Nucleo F411RE...

GPIO pin of STM32F031G4U6 may be broken during connecting LSM6DSL.

I control LSM6DSL by using STM32F031G4U6.INT2 of LSM6DSL connects PA8 of STM32F031G4U6.PA8 of STM32F031G4U6 set output port, no pull-up, no-pull down.I mistake the configuration of LSM6DSL.I must set INT2 pin of LSM6DSL to input port, but I set it...

Resolved! Starting a Timer via a GPIO Pin at a changing edge and return the value into the DMA via another GPIO and changing edge

Hey,I'm using a Nucleo-F446RE and the STM32 Cube IDE.I want to start the Timer3 with a changing Edge at a GPIO Pin. Then the Timer should count till another GPIO has a changing Edge aswell. Now the timer should be disabled and the counter should be s...

How to trace the data in SWV using STM32F303RE Nucleo board?

Actually, I could able to debug the STM32F303RE Nucleo board and could see the value of the variables by keeping the breakpoint while debugging.Instead of keeping the breakpoint, I want to trace the value of the variable using SWV and also I want to ...

STM32H745 - SPI doesn't transmit any data. - SOLVED

SOLVED - look at edit below!I am trying to implement SPI on nucleoH745ZI-Q without HAL or any kind of driver, I wrote my own registers pointers and functions like digitalWrite, pinMode or printf. I set up RCC, GPIO and SPI registers (all set, checked...

STM32 MCUs Products

Forum Posts

Hi, I am using NUCLEO-64 STM32F401 and I have attached a serial EEPROM to I2C3. I am using the LL library calls to try to write to the EEPROM but I cant get the slave address to appear on the I2C bus. I do see the start pulse on the scope. Code below.

Program gets stuck in for loop after interrupt runs

SPI communication between f030R8 (slave) and ESP32 (master)

STM32L4R5ZI - Is it possible to erase a page and write a double word in Flash ?

STM32F427 is sometimes running slow after boot

Can't get expected results working with external memory with I2C

GPIO pin of STM32F031G4U6 may be broken during connecting LSM6DSL.

Resolved! Starting a Timer via a GPIO Pin at a changing edge and return the value into the DMA via another GPIO and changing edge

How to trace the data in SWV using STM32F303RE Nucleo board?

STM32H745 - SPI doesn't transmit any data. - SOLVED

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