  /**
  @addtogroup MDR1215LGI_BTN_LED Button and LED example for MDR1215LGI demo board
  @latexonly
  @verbatim
  ******************** (C) COPYRIGHT 2026 Milandr ******************************
  * @file    readme.txt
  * @author  Milandr Application Team
  * @version V0.1.0
  * @date    24/04/2026
  * @brief   Description of the BTN_LED Example.
  ******************************************************************************
  * THE PRESENT FIRMWARE IS FOR GUIDANCE ONLY. IT AIMS AT PROVIDING CUSTOMERS
  * WITH CODING INFORMATION REGARDING MILANDR'S PRODUCTS IN ORDER TO FACILITATE
  * THE USE AND SAVE TIME. MILANDR SHALL NOT BE HELD LIABLE FOR ANY
  * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES RESULTING
  * FROM THE CONTENT OF SUCH FIRMWARE AND/OR A USE MADE BY CUSTOMERS OF THE
  * CODING INFORMATION CONTAINED HEREIN IN THEIR PRODUCTS.
  ******************************************************************************
  @endverbatim
  @endlatexonly

@par Example Description

The frequency of the microcontroller is set to 40 MHz using HSI (8 MHz) and PLL (multiplication by 5).
The PD5 pin is configured as a digital GPIO input for listening to the button press of the demo board.
The PD7 pin is configured as a digital GPIO output for switching the LED on the demo board.
The code constantly waits for the button to be pressed and switches the LED state.

@par Directory contains:

    - main.c    Main program.


@par Hardware and Software environment:

    - Configure the Eclipse IDE for Embedded C/C++ Developers, RISCV GCC toolchain and OpenOCD with Milandr MCUs support
      according to the article https://support.milandr.ru/base/primenenie/programmirovanie-32-razryadnykh-mk/nachalo-raboty/55472/.
    - Configure demo board jumpers and power supply according to the demo board documentation:
        - "SEL PWR" to select power supply;
        - TDO/RESET/ect.jumpers to setup external or on-board FT2232HL debugger usage;
        - Place "BTN_EN" and "RXD_LED" jumpers for button and LED;
        - Remove any other jumpers.

@par How to use.

To launch the example, you must do the following:
    - Import the project into the Eclipse IDE.
    - Compile the project using one of the existing build configurations.
    - Run the project using one of the existing debug configurations.

 * <h3><center>&copy; COPYRIGHT 2026 Milandr</center></h3>
 */
