UART1 Configuration for Data Bits(Word Length) 7.

[Nikunj Patel]

Hi @All ALL​ @Martin KJELDSEN​ 

I am using STM32F412CGU6 microcontroller.

I would like to Configure UART1 with following settings.

  • Baud Rate: 9600

  • Start bits: 1

  • Parity: Even

  • Data Bits: 7

  • Flow Control: Off

  • Stop Bits: 1

In STM32CubeMX, There is no configuration available for Data Bits 7.

So, How can I configure the above UART settings.

Thanks 

Nikunj Patel

[Peter BENSCH]

That is correct, as the USART in the STM32F4xx only support a data word length of 8 or 9 bit.

You need to switch to another STM32, e.g. STM32L4xx to be able to use a data word length of 7, 8 or 9 bit.

Good luck!

When your question is answered, please close this topic by choosing Select as Best. This will help other users find that answer faster.

/Peter

[TDK · Accepted solution]

Setting a word length of 8 bits and even parity will get you what you want. The word length is inclusive of the parity bits.

[Peter BENSCH]

@TDK​ is absolutely right, I haven't seen the parameter Parity: Even.