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▷ Arm Cortex-M4 (1): USART serial communication

 

Arm Cortex-M4 (1): USART serial communication 

  • ✅ practice description:
    • The practice of USART serial communication with the NUCLEO-F446RE model aims to establish a bidirectional communication between the STM32F446RE microcontroller and another external device using the USART (Universal Synchronous/Asynchronous Receiver/Transmitter) protocol. The STM32F446RE is an advanced microcontroller based on the Arm® Cortex®-M4 core, operating at a frequency of 180 MHz, which enables it to perform data processing tasks quickly and efficiently.
    • To carry out the practice, the transmission (TX) and reception (RX) pins of the microcontroller's USART will be connected to the corresponding serial communication pins of the external device. Additionally, serial communication parameters such as transmission speed, data format (number of bits, parity, and stop bits), and transmission mode (synchronous or asynchronous) will be configured according to the application's requirements.
    • Once the configuration is set, the microcontroller will send data to the external device through the TX pin and receive data back through the RX pin. This will allow the exchange of information between both devices efficiently.
    • USART serial communication practice is essential in applications where data transfer is critical, such as communication with sensors, actuators, displays, or even other microcontrollers. With the STM32F446RE and its Arm® Cortex®-M4 core, reliable and fast serial communication can be achieved, making this microcontroller an excellent choice for various industrial, automation, and embedded electronics applications. By mastering the configuration and usage of USART in this model, developers can fully harness its potential to implement complex and high-performance systems.
  • ✅ Steps:
    • Selection of the STM32F446RE Development Board.
      • Choose the NUCLEO-F446RE board as the foundation for the practice. Ensure all necessary components are correctly connected.

  • Including the .h files of the devices and drivers:
    • Add the header (.h) files of the devices and drivers required for USART communication. These files are essential for proper interaction with the microcontroller's peripherals.
  • Write the code to be used:
    • Write the code in the corresponding source file. Implement the necessary functions and configurations for USART communication initialization and handling. Ensure adherence to best programming practices.
  • Compile the project:
    • Compile the project using the selected development environment (e.g., STM32CubeIDE). Verify there are no compilation errors and the code compiles correctly for the STM32F446RE microcontroller.
  • Data transmission tests:
    • Perform data transmission tests to verify bidirectional communication between the microcontroller and the external device. In this step, send and receive data through the USART transmission (TX) and reception (RX) pins.

  • ✅ Conclusions:
    • In this section, share the conclusions drawn from the practice. Discuss encountered challenges, implemented solutions, and lessons learned. Analyze how USART serial communication is applied in real-world scenarios and emphasize the importance of understanding and mastering this technology in the context of microcontroller programming.

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