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-rw-r--r--core/time.c77
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diff --git a/core/time.c b/core/time.c
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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 time.c
- *
- * @brief
- */
-
-#include "libmaple.h"
-#include "systick.h"
-#include "time.h"
-
-#define CYCLES_PER_MICROSECOND 72
-#define FUDGE 42
-
-extern volatile uint32 systick_timer_millis;
-
-uint32 millis() {
- unsigned long m;
- m = systick_timer_millis;
- return m;
-}
-
-void delay(unsigned long ms)
-{
- unsigned long start = millis();
-
- while (millis() - start <= ms)
- ;
-}
-
-
-
-#if 1
-void delayMicroseconds(uint32 us) {
- uint32 target;
- uint32 last, cur, count;
- /* fudge factor hacky hack hack for function overhead */
- target = us * CYCLES_PER_MICROSECOND - FUDGE;
-
- /* Get current count */
- last = systick_get_count();
- cur = systick_get_count();
- count = last;
- while ((count-cur) <= target) {
- cur = systick_get_count();
-
- /* check for overflow */
- if (cur > last) {
- count += MAPLE_RELOAD_VAL;
- }
- last = cur;
- }
-}
-#endif