Posted on May 31, 2017 at 07:21Ok, found out what was wrong. I forgot to remove two solder bridges on the Nucleo board (SB16, SB18). The solder bridges were connecting PB6 (Bootloader I2C SCL) to PA6 and PB7 (Bootloader I2C SDA) to PA5. PA5 and PA6 ...

Posted on May 30, 2017 at 11:11Have similar problem with STM32L432KC-Nucleo board. I2C1 is working if used in example firmware (or my own firmware) but not with bootloader.Something strange is happening with SCL (see screenshot)