Asking for urgent help to write a program on the STM32L432KCU

Thread Starter

Mohammed Al-Bunde

Joined May 20, 2021
I'm totally new to the MCU world and was asked to write a program on the STM32L432KCUx that will do the following:

  • accept up to a 4 digit value from the virtual serial port on the STM Board.
  • If the 4 digit value is one of the 10 passcodes stored in an array, issue an auditory feedback signal and the text "access granted" to the serial port.
  • If it is not one of the 10 allowable pass-codes, issue another appropriate auditory feedback signal, and the text "access denied."
  • Also, illuminate a red led if the access is not granted and green led if access is granted.
Guys, your help means a lot to me.



Joined Apr 11, 2010
Bro. as I told you, I am new in this field, so you mean I should build the flow chart for the problem, and after that, I can build the code?
Especially since you are new, that is a good approach. The flowchart will show you what code you need to write. It will help prevent you from writing code which doesn’t make sense.


Joined Oct 2, 2009
It does not matter what MCU you are using. The steps are the same.
The first step is drawing a flowchart.
The last step, besides testing and debugging, is writing the code.
No one here is going to write code for you.