[Atmel] 用ASF跑SAMD21程序(28) 管脚输出时钟

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/**

 * \file

 *

 * \brief Empty user application template

 *

 */



/**

 * \mainpage User Application template doxygen documentation

 *

 * \par Empty user application template

 *

 * This is a bare minimum user application template.

 *

 * For documentation of the board, go \ref group_common_boards "here" for a link

 * to the board-specific documentation.

 *

 * \par Content

 *

 * -# Include the ASF header files (through asf.h)

 * -# Minimal main function that starts with a call to system_init()

 * -# Basic usage of on-board LED and button

 * -# "Insert application code here" comment

 *

 */



/*

 * Include header files for all drivers that have been imported from

 * Atmel Software Framework (ASF).

 */

 /**

 * Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel Support</a>

 */

 

 static void setup_clock_out_pin(void);

#include <asf.h>

#define CONF_CLOCK_PIN_OUT            PIN_PA28H_GCLK_IO0

#define CONF_CLOCK_PIN_MUX            MUX_PA28H_GCLK_IO0

static void setup_clock_out_pin(void)

{

        struct system_pinmux_config pin_mux;

        system_pinmux_get_config_defaults(&pin_mux);



        /* MUX out the system clock to a I/O pin of the device */

        pin_mux.mux_position = CONF_CLOCK_PIN_MUX;

        system_pinmux_pin_set_config(CONF_CLOCK_PIN_OUT, &pin_mux);

}





int main (void)

{

        system_init();

        setup_clock_out_pin();

        



        // Insert application code here, after the board has been initialized.



        // This skeleton code simply sets the LED to the state of the button.

        while (1) {

                // Is button pressed?

                if (port_pin_get_input_level(BUTTON_0_PIN) == BUTTON_0_ACTIVE) {

                        // Yes, so turn LED on.

                        port_pin_set_output_level(LED_0_PIN, LED_0_ACTIVE);

                } else {

                        // No, so turn LED off.

                        port_pin_set_output_level(LED_0_PIN, !LED_0_ACTIVE);

                }

        }

}