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Problem with STM32F37 USART1 Clock Mux on PCLK2

Question asked by Philip Ridder on Feb 12, 2018

Hello together,


I'm working with an STM32F37 MCU and have somme issues with the USART1 Clock Mux.


I enabled the Receiver Timeout Interrupt to detect the end of a Modbus message. With the HSI clock the interrupt occurs as expected. If I switch to the PCLK2 no interrupt will be triggered whilst the rest of the MCU is working fine.


Please see the picture below to get a clue of my clock configuration.


Thank you in advance for your support.