STM32 MCUs Boards and hardware tools

i2c slave address conflict between B-LCDAD-HDMI1 and B-CAMS-OMV.

When using both B-LCDAD-HDMI1 and B-CAMS-OMV together on STM32M747I-Disc, HDMI has no output. Finally, found that i2c address of OV5640 use the same address of ADV7533 CEC-DSI. Any solution?

Resolved! Problem with flashing STM32G070 MCU via i2c after ST link has been used

I'm using a STM32G070 MCU which I flash via i2c when the boot0 pin is set to high. This works fine until I connect a ST-link to the MCU, program it and then disconnect the ST-link again. After that the i2c flash will fail, I have checked the boot0 an...

F411 I2C Recover from Error

I have my own F411 PCB board, on which there are a few devices that MCU/F411 uses I2C1 (I2C HAL) to communicate.Sometimes I2C HAL API (HAL_I2C_Mem_Read, HAL_I2C_Master_Transmit, HAL_I2C_Master_Receive) calls may return with error: most of the time er...

Resolved! I2C PULL UP RESISTORS

In disco boards and evaluation boards there are 1.5k Ohm resistors, would it be a problem if I use 2k Ohms?

Resolved! Why is I2C1 clock (PB6) also appearing on PA6? (L412KB)

I'm talking to a camera device on I2C1. That is working fine. I read back the data via DMA on a scan signal. This also works fine except for one bit, D6, mapped to GPIO PA6. If the output pin from the camera is connected to PA6, I2C1 stops working. F...

Trouble connecting MPU-9250 breakout to STM32 Nucleo F411RE

Hi everyone,I'm really new to the whole concept of STM32, and I'm having trouble interfacing with my MPU-9250, which looks like: The Breakout board does not actually do much to the Invensense MPU-9250 chip, only provides some basic power regulation a...

Also, I heard "Pull-up resistors are not require because STM32F already have one." is that true? Please help me about it. I will be really appriciated.

Hi everyone, I am confuse about I2C pull-up resistors. I use 4 I2C sensors. I am not sure is it true that pull-up resistors count. I use every sensors for pull-up resistors. If I use just one I2C port (I mean one port for all sensors) is it enough?

Resolved! In NUCLEO-L432KC Is it possible to use pins PB6 and PB7 if I have allocated pins PA9 and PA10 for the I2C1 port?

Hi ST community,I'm working with NUCLEO L432KC and in my application I need to use I2C1 port. Using STM32CubeMX to generate the project, I could see that when I enable the I2C1 port, Automatically the CubeMX allocate the PA9 and P10 pins. For my appl...

I am using a STM32G071. If I connect a STLINK to the uC, and then I disconnect it, also after a reset cycle, BOOT0 pin status is ignored and the boot happens always on Flash Memory instead of System Memory. Why? Is it normal?

I want to use BOOT0 pin to select System Memory boot.nBOOT0 = 0, nBOOT1 = 1, nBOOT_SEL = 0 bits in user config are well programmed. Boot works well if my uC is coming from a POR or power cycle. But if I connect a ST-LINK to the uC and simply open the...

STM32F407VG --- I2C Flag error

I have coded a program for I2C for my STM32F407 DISC-1 board.In which STM32 acts as master and sends data to a Arduino UNO whenever user button on STM board is pressed code works fine , i am getting proper output which is expected but when I run code...