text: /**
   * \file
   *
   * \brief Clock system example 2
   *
   * Copyright (c) 2014-2018 Microchip Technology Inc. and its subsidiaries.
   *
   * \asf_license_start
   *
   * \page License
   *
   * Subject to your compliance with these terms, you may use Microchip
   * software and any derivatives exclusively with Microchip products.
   * It is your responsibility to comply with third party license terms applicable
   * to your use of third party software (including open source software) that
   * may accompany Microchip software.
   *
   * THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES,
   * WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE,
   * INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY,
   * AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE
   * LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL
   * LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE
   * SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE
   * POSSIBILITY OR THE DAMAGES ARE FORESEEABLE.  TO THE FULLEST EXTENT
   * ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY
   * RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY,
   * THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE.
   *
   * \asf_license_stop
   *
   */
  
  /**
   * \mainpage
   *
   * \section intro Introduction
   * This example shows how to initialize the clock system and output the
   * CPU clock on a dedicated pin.
   *
   * \section files Main files:
   * - clock_example2_sam4l.c: clock system example application
   * - conf_board.h: board initialization configuration
   * - conf_clock.h: system clock configuration
   * - conf_example2.h: chip- or board-specific example configuration
   *
   * \section deviceinfo Device Info
   * All SAM4L devices can be used.
   *
   * \section exampledescription Description of the example
   * This example makes use of the output GPIO function for a generic clock to
   * output the CPU clock on a pin.
   *
   * The generic clock and its corresponding GPIO pin and function are defined in
   * conf_example2.h.
   * The main system clock source and prescalers, along with any PLL
   * and/or DFLL configuration, if supported, are defined in conf_clock.h.
   *
   * \section compinfo Compilation Info
   * This software was written for the GNU GCC and IAR for SAM.
   * Other compilers may or may not work.
   *
   * \section contactinfo Contact Information
   * For further information, visit
   * <A href="http://www.microchip.com/">Microchip</A>.\n
   */
  
  //! \name Example configuration
  //@{
  /**
   * \def GCLK_ID
   * \brief Generic clock ID
   *
   * This is the ID of the generic clock to use.
   */
  /**
   * \def GCLK_PIN
   * \brief Generic clock output GPIO pin
   *
   * This is the GPIO pin on which the generic clock signal will be output.
   *
   * \note Not all GPIO pins can be used for this purpose. Refer to the device's
   * datasheet or device header file for details on which GPIO pins can be used
   * for output of the individual generic clocks.
   */
  /**
   * \def GCLK_FUNCTION
   * \brief Generic clock function for GPIO pin
   *
   * This is the GPIO function for output of the generic clock with the configured
   * ID on the GPIO pin.
   */
  /**
   * \def GCLK_SOURCE
   * \brief Generic clock source
   *
   * This is the clock source to use for the generic clock.
   */
  /**
   * \def GCLK_DIV
   * \brief Generic clock divider
   *
   * This is how much the generic clock should divide the frequency of the
   * configured clock source by.
   */
  /*
   * Support and FAQ: visit <a href="https://www.microchip.com/support/">Microchip Support</a>
   */
  //@}
  
  #include <asf.h>
  #include <conf_example2.h>
  
  int main(void)
  {
  	sysclk_init();
  	board_init();
  
  	genclk_enable_config(GCLK_ID, GCLK_SOURCE, GCLK_DIV);
  
  	/* Enable GPIO Alternate to output GCLK */
  	ioport_set_pin_mode(GCLK_PIN, GCLK_FUNCTION);
  	ioport_disable_pin(GCLK_PIN);
  
  	while (1) {
  		/* Do nothing */
  	}
  }
  
  