[Atmel] 用ASF跑SAMD21程序(19)WDT CALLBACK

/**

 * \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>

 */

#include <asf.h>

void watchdog_early_warning_callback(void);

void configure_wdt(void);

void configure_wdt_callbacks(void);



//! [setup]

void watchdog_early_warning_callback(void)

{

        port_pin_set_output_level(LED_0_PIN, LED_0_ACTIVE);

}



void configure_wdt(void)

{

        /* Create a new configuration structure for the Watchdog settings and fill

         * with the default module settings. */

        //! [setup_1]

        struct wdt_conf config_wdt;

        //! [setup_1]

        //! [setup_2]

        wdt_get_config_defaults(&config_wdt);

        //! [setup_2]



        /* Set the Watchdog configuration settings */

        //! [setup_3]

        config_wdt.always_on            = false;

#if !(SAML21)

        config_wdt.clock_source         = GCLK_GENERATOR_2;

#endif

        config_wdt.timeout_period       = WDT_PERIOD_4096CLK;

        config_wdt.early_warning_period = WDT_PERIOD_2048CLK;

        //! [setup_3]



        /* Initialize and enable the Watchdog with the user settings */

        //! [setup_4]

        wdt_set_config(&config_wdt);

        //! [setup_4]

}



void configure_wdt_callbacks(void)

{

        //! [setup_5]

        wdt_register_callback(watchdog_early_warning_callback,

                WDT_CALLBACK_EARLY_WARNING);

        //! [setup_5]



        //! [setup_6]

        wdt_enable_callback(WDT_CALLBACK_EARLY_WARNING);

        //! [setup_6]

}

//! [setup]



int main(void)

{

        system_init();



        //! [setup_init]

        configure_wdt();

        configure_wdt_callbacks();

        //! [setup_init]



//! [main]

//! [main_1]

        port_pin_set_output_level(LED_0_PIN, LED_0_INACTIVE);

//! [main_1]



//! [main_2]

        system_interrupt_enable_global();

//! [main_2]



        //! [main_3]

        while (true) {

                /* Wait for callback */

        }

        //! [main_3]

//! [main]

}

/**

 * \file

 *

 * \brief SAM D21 Clock configuration

 *

 * Copyright (C) 2013-2014 Atmel Corporation. All rights reserved.

 *

 * \asf_license_start

 *

 * \page License

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions are met:

 *

 * 1. Redistributions of source code must retain the above copyright notice,

 *    this list of conditions and the following disclaimer.

 *

 * 2. Redistributions in binary form must reproduce the above copyright notice,

 *    this list of conditions and the following disclaimer in the documentation

 *    and/or other materials provided with the distribution.

 *

 * 3. The name of Atmel may not be used to endorse or promote products derived

 *    from this software without specific prior written permission.

 *

 * 4. This software may only be redistributed and used in connection with an

 *    Atmel microcontroller product.

 *

 * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED

 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF

 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE

 * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR

 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,

 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN

 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

 * POSSIBILITY OF SUCH DAMAGE.

 *

 * \asf_license_stop

 *

 */

 /**

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

 */

#include <clock.h>



#ifndef CONF_CLOCKS_H_INCLUDED

#  define CONF_CLOCKS_H_INCLUDED



/* System clock bus configuration */

#  define CONF_CLOCK_CPU_CLOCK_FAILURE_DETECT     false

#  define CONF_CLOCK_FLASH_WAIT_STATES            0

#  define CONF_CLOCK_CPU_DIVIDER                  SYSTEM_MAIN_CLOCK_DIV_1

#  define CONF_CLOCK_APBA_DIVIDER                 SYSTEM_MAIN_CLOCK_DIV_1

#  define CONF_CLOCK_APBB_DIVIDER                 SYSTEM_MAIN_CLOCK_DIV_1



/* SYSTEM_CLOCK_SOURCE_OSC8M configuration - Internal 8MHz oscillator */

#  define CONF_CLOCK_OSC8M_PRESCALER              SYSTEM_OSC8M_DIV_1

#  define CONF_CLOCK_OSC8M_ON_DEMAND              true

#  define CONF_CLOCK_OSC8M_RUN_IN_STANDBY         false



/* SYSTEM_CLOCK_SOURCE_XOSC configuration - External clock/oscillator */

#  define CONF_CLOCK_XOSC_ENABLE                  false

#  define CONF_CLOCK_XOSC_EXTERNAL_CRYSTAL        SYSTEM_CLOCK_EXTERNAL_CRYSTAL

#  define CONF_CLOCK_XOSC_EXTERNAL_FREQUENCY      12000000UL

#  define CONF_CLOCK_XOSC_STARTUP_TIME            SYSTEM_XOSC_STARTUP_32768

#  define CONF_CLOCK_XOSC_AUTO_GAIN_CONTROL       true

#  define CONF_CLOCK_XOSC_ON_DEMAND               true

#  define CONF_CLOCK_XOSC_RUN_IN_STANDBY          false



/* SYSTEM_CLOCK_SOURCE_XOSC32K configuration - External 32KHz crystal/clock oscillator */

#  define CONF_CLOCK_XOSC32K_ENABLE               false

#  define CONF_CLOCK_XOSC32K_EXTERNAL_CRYSTAL     SYSTEM_CLOCK_EXTERNAL_CRYSTAL

#  define CONF_CLOCK_XOSC32K_STARTUP_TIME         SYSTEM_XOSC32K_STARTUP_65536

#  define CONF_CLOCK_XOSC32K_AUTO_AMPLITUDE_CONTROL  false

#  define CONF_CLOCK_XOSC32K_ENABLE_1KHZ_OUPUT    false

#  define CONF_CLOCK_XOSC32K_ENABLE_32KHZ_OUTPUT  true

#  define CONF_CLOCK_XOSC32K_ON_DEMAND            true

#  define CONF_CLOCK_XOSC32K_RUN_IN_STANDBY       false



/* SYSTEM_CLOCK_SOURCE_OSC32K configuration - Internal 32KHz oscillator */

#  define CONF_CLOCK_OSC32K_ENABLE                false

#  define CONF_CLOCK_OSC32K_STARTUP_TIME          SYSTEM_OSC32K_STARTUP_130

#  define CONF_CLOCK_OSC32K_ENABLE_1KHZ_OUTPUT    true

#  define CONF_CLOCK_OSC32K_ENABLE_32KHZ_OUTPUT   true

#  define CONF_CLOCK_OSC32K_ON_DEMAND             true

#  define CONF_CLOCK_OSC32K_RUN_IN_STANDBY        false



/* SYSTEM_CLOCK_SOURCE_DFLL configuration - Digital Frequency Locked Loop */

#  define CONF_CLOCK_DFLL_ENABLE                  false

#  define CONF_CLOCK_DFLL_LOOP_MODE               SYSTEM_CLOCK_DFLL_LOOP_MODE_OPEN

#  define CONF_CLOCK_DFLL_ON_DEMAND               false



/* DFLL open loop mode configuration */

#  define CONF_CLOCK_DFLL_COARSE_VALUE            (0x1f / 4)

#  define CONF_CLOCK_DFLL_FINE_VALUE              (0xff / 4)



/* DFLL closed loop mode configuration */

#  define CONF_CLOCK_DFLL_SOURCE_GCLK_GENERATOR   GCLK_GENERATOR_1

#  define CONF_CLOCK_DFLL_MULTIPLY_FACTOR         6

#  define CONF_CLOCK_DFLL_QUICK_LOCK              true

#  define CONF_CLOCK_DFLL_TRACK_AFTER_FINE_LOCK   true

#  define CONF_CLOCK_DFLL_KEEP_LOCK_ON_WAKEUP     true

#  define CONF_CLOCK_DFLL_ENABLE_CHILL_CYCLE      true

#  define CONF_CLOCK_DFLL_MAX_COARSE_STEP_SIZE    (0x1f / 4)

#  define CONF_CLOCK_DFLL_MAX_FINE_STEP_SIZE      (0xff / 4)



/* SYSTEM_CLOCK_SOURCE_DPLL configuration - Digital Phase-Locked Loop */

#  define CONF_CLOCK_DPLL_ENABLE                  false

#  define CONF_CLOCK_DPLL_ON_DEMAND               true

#  define CONF_CLOCK_DPLL_RUN_IN_STANDBY          false

#  define CONF_CLOCK_DPLL_LOCK_BYPASS             false

#  define CONF_CLOCK_DPLL_WAKE_UP_FAST            false

#  define CONF_CLOCK_DPLL_LOW_POWER_ENABLE        false



#  define CONF_CLOCK_DPLL_LOCK_TIME               SYSTEM_CLOCK_SOURCE_DPLL_LOCK_TIME_NO_TIMEOUT

#  define CONF_CLOCK_DPLL_REFERENCE_CLOCK         SYSTEM_CLOCK_SOURCE_DPLL_REFERENCE_CLOCK_REF0

#  define CONF_CLOCK_DPLL_FILTER                  SYSTEM_CLOCK_SOURCE_DPLL_FILTER_DEFAULT



#  define CONF_CLOCK_DPLL_REFERENCE_FREQUENCY     32768

#  define CONF_CLOCK_DPLL_REFEREMCE_DIVIDER       1

#  define CONF_CLOCK_DPLL_OUTPUT_FREQUENCY        48000000



/* Set this to true to configure the GCLK when running clocks_init. If set to

 * false, none of the GCLK generators will be configured in clocks_init(). */

#  define CONF_CLOCK_CONFIGURE_GCLK               true



/* Configure GCLK generator 0 (Main Clock) */

#  define CONF_CLOCK_GCLK_0_ENABLE                true

#  define CONF_CLOCK_GCLK_0_RUN_IN_STANDBY        false

#  define CONF_CLOCK_GCLK_0_CLOCK_SOURCE          SYSTEM_CLOCK_SOURCE_OSC8M

#  define CONF_CLOCK_GCLK_0_PRESCALER             1

#  define CONF_CLOCK_GCLK_0_OUTPUT_ENABLE         false



/* Configure GCLK generator 1 */

#  define CONF_CLOCK_GCLK_1_ENABLE                true

#  define CONF_CLOCK_GCLK_1_RUN_IN_STANDBY        false

#  define CONF_CLOCK_GCLK_1_CLOCK_SOURCE           SYSTEM_CLOCK_SOURCE_ULP32K

#  define CONF_CLOCK_GCLK_1_PRESCALER             1

#  define CONF_CLOCK_GCLK_1_OUTPUT_ENABLE         false



/* Configure GCLK generator 2 (RTC) */

#  define CONF_CLOCK_GCLK_2_ENABLE                false

#  define CONF_CLOCK_GCLK_2_RUN_IN_STANDBY        false

#  define CONF_CLOCK_GCLK_2_CLOCK_SOURCE          SYSTEM_CLOCK_SOURCE_OSC32K

#  define CONF_CLOCK_GCLK_2_PRESCALER             32

#  define CONF_CLOCK_GCLK_2_OUTPUT_ENABLE         false



/* Configure GCLK generator 3 */

#  define CONF_CLOCK_GCLK_3_ENABLE                false

#  define CONF_CLOCK_GCLK_3_RUN_IN_STANDBY        false

#  define CONF_CLOCK_GCLK_3_CLOCK_SOURCE          SYSTEM_CLOCK_SOURCE_OSC8M

#  define CONF_CLOCK_GCLK_3_PRESCALER             1

#  define CONF_CLOCK_GCLK_3_OUTPUT_ENABLE         false



/* Configure GCLK generator 4 */

#  define CONF_CLOCK_GCLK_4_ENABLE                true

#  define CONF_CLOCK_GCLK_4_RUN_IN_STANDBY        false

#  define CONF_CLOCK_GCLK_4_CLOCK_SOURCE          SYSTEM_CLOCK_SOURCE_ULP32K

#  define CONF_CLOCK_GCLK_4_PRESCALER             32

#  define CONF_CLOCK_GCLK_4_OUTPUT_ENABLE         false



/* Configure GCLK generator 5 */

#  define CONF_CLOCK_GCLK_5_ENABLE                false

#  define CONF_CLOCK_GCLK_5_RUN_IN_STANDBY        false

#  define CONF_CLOCK_GCLK_5_CLOCK_SOURCE          SYSTEM_CLOCK_SOURCE_OSC8M

#  define CONF_CLOCK_GCLK_5_PRESCALER             1

#  define CONF_CLOCK_GCLK_5_OUTPUT_ENABLE         false



/* Configure GCLK generator 6 */

#  define CONF_CLOCK_GCLK_6_ENABLE                false

#  define CONF_CLOCK_GCLK_6_RUN_IN_STANDBY        false

#  define CONF_CLOCK_GCLK_6_CLOCK_SOURCE          SYSTEM_CLOCK_SOURCE_OSC8M

#  define CONF_CLOCK_GCLK_6_PRESCALER             1

#  define CONF_CLOCK_GCLK_6_OUTPUT_ENABLE         false



/* Configure GCLK generator 7 */

#  define CONF_CLOCK_GCLK_7_ENABLE                false

#  define CONF_CLOCK_GCLK_7_RUN_IN_STANDBY        false

#  define CONF_CLOCK_GCLK_7_CLOCK_SOURCE          SYSTEM_CLOCK_SOURCE_OSC8M

#  define CONF_CLOCK_GCLK_7_PRESCALER             1

#  define CONF_CLOCK_GCLK_7_OUTPUT_ENABLE         false



#endif /* CONF_CLOCKS_H_INCLUDED */