ATSAMD51 EVK评估板评测4定时器点灯

// *****************************************************************************

// *****************************************************************************

// Section: Included Files

// *****************************************************************************

// *****************************************************************************



#include <stddef.h>                     // Defines NULL

#include <stdbool.h>                    // Defines true

#include <stdlib.h>                     // Defines EXIT_FAILURE

#include "definitions.h"                // SYS function prototypes



// DOM-IGNORE-BEGIN

/*******************************************************************************

* Copyright (C) 2018 Microchip Technology Inc. and its subsidiaries.

*

* 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.

*******************************************************************************/

// DOM-IGNORE-END



// *****************************************************************************

// *****************************************************************************

// Section: Main Entry Point

// *****************************************************************************

// *****************************************************************************



/* This function is called after period expires */

void TC0_Callback_InterruptHandler(TC_TIMER_STATUS status, uintptr_t context)

{

    /* Toggle LED */

    LED_Toggle();

}



// *****************************************************************************

// *****************************************************************************

// Section: Main Entry Point

// *****************************************************************************

// *****************************************************************************



int main ( void )

{

    /* Initialize all modules */

    SYS_Initialize ( NULL );

    

    /* Register callback function for TC0 period interrupt */

    TC0_TimerCallbackRegister(TC0_Callback_InterruptHandler, (uintptr_t)NULL);

    

    /* Start the timer channel 0*/

    TC0_TimerStart();



    while ( true )

    {

        /* Maintain state machines of all polled MPLAB Harmony modules. */

        SYS_Tasks ( );

    }



    /* Execution should not come here during normal operation */



    return ( EXIT_FAILURE );

}





/*******************************************************************************

 End of File

*/

void SYS_Initialize ( void* data )

{



    NVMCTRL_Initialize( );



  

    PORT_Initialize();



    CLOCK_Initialize();









    EVSYS_Initialize();



    TC0_TimerInitialize();











    NVIC_Initialize();



}



/* Register callback function */

void TC0_TimerCallbackRegister( TC_TIMER_CALLBACK callback, uintptr_t context )

{

    TC0_CallbackObject.callback = callback;



    TC0_CallbackObject.context = context;

}



/* Enable the TC counter */

void TC0_TimerStart( void )

{

    TC0_REGS->COUNT16.TC_CTRLA |= TC_CTRLA_ENABLE_Msk;

    while((TC0_REGS->COUNT16.TC_SYNCBUSY & TC_SYNCBUSY_ENABLE_Msk) == TC_SYNCBUSY_ENABLE_Msk)

    {

        /* Wait for Write Synchronization */

    }

}