Preciso de um código para STM32F401 que inomplemente um teclado 4x4. Descrição completa estará em anexo.

I am looking for a freelancer who can help me with a personal project involving the STM32F401 microcontroller.

Project Requirements:
- Implement a 4x4 keypad using STM32F401 coding
- The complete project description will be provided in the attached document

Ideal Skills and Experience:
- Intermediate level of familiarity with STM32F401 coding
- Strong understanding of microcontroller programming and keypad interfacing
- Experience in developing projects with STM32F401 microcontrollers

Deadline:
- The desired deadline for this project is less than a week