STM32L431 I2C master transmitter freezes if SCL is pulled down externally when it starts
When I2C master transaction (both Rx and Tx) is started while SCL is pulled to 0 externally, it goes into BUSY mode (I2C_ISR=0x8001) and remains there indefinitely, without setting any interrupt-generating flag, even after the external SCL->0 is remo...