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/* *****************************************************************************
* The MIT License
*
* Copyright (c) 2010 Perry Hung.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
* ****************************************************************************/
/**
* @file systick.c
*
* @brief System timer interrupt handler and initialization routines
*/
#include "libmaple.h"
#include "systick.h"
#define MILLIS_INC 1
volatile uint32 systick_timer_millis = 0;
void systick_init(void) {
/* Set the reload counter to tick every 1ms */
REG_SET_MASK(SYSTICK_RELOAD, MAPLE_RELOAD_VAL);
// SYSTICK_RELOAD = MAPLE_RELOAD_VAL;
/* Clock the system timer with the core clock
* and turn it on, interrrupt every 1ms to keep track of millis()*/
REG_SET(SYSTICK_CSR, SYSTICK_SRC_HCLK |
SYSTICK_ENABLE |
SYSTICK_TICKINT);
// SYSTICK_CSR = SYSTICK_SRC_HCLK |
// SYSTICK_ENABLE |
// SYSTICK_TICKINT;
}
void SysTickHandler(void) {
systick_timer_millis++;
}
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