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/* ----------------------------------------------------------------------------
* ATMEL Microcontroller Software Support
* ----------------------------------------------------------------------------
* Copyright (c) 2008, Atmel Corporation
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the disclaimer below.
*
* Atmel's name may not be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* DISCLAIMER: 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
* 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.
* ----------------------------------------------------------------------------
*/
//------------------------------------------------------------------------------
// Headers
//------------------------------------------------------------------------------
#include "systick.h"
//------------------------------------------------------------------------------
/// Configures the SysTick in .
/// \param countEnable Enable SysTick counting.
/// \param reloadValue Value used for tick counter to reload.
/// \param handler Interrupt handler function, 0 to disable interrupt.
//------------------------------------------------------------------------------
void SysTick_Configure(unsigned char countEnable,
unsigned int reloadValue,
void( *handler )( void ))
{
unsigned int intEnable = handler ? AT91C_NVIC_STICKINT : 0;
// Disable the SysTick & using core source
AT91C_BASE_NVIC->NVIC_STICKCSR = AT91C_NVIC_STICKCLKSOURCE;
// Reset the current value
AT91C_BASE_NVIC->NVIC_STICKCVR &= ~(unsigned int)AT91C_NVIC_STICKCURRENT;
// Setup the reload value
AT91C_BASE_NVIC->NVIC_STICKRVR = reloadValue;
// Enable the SysTick
AT91C_BASE_NVIC->NVIC_STICKCSR = AT91C_NVIC_STICKCLKSOURCE
| AT91C_NVIC_STICKENABLE
| intEnable;
}
|
