kopia lustrzana https://github.com/open-ham/OpenGD77
92 wiersze
2.6 KiB
C
92 wiersze
2.6 KiB
C
/*
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* Copyright (C)2019 Kai Ludwig, DG4KLU
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <string.h>
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#include "functions/ticks.h"
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#define PIT_COUNTS_PER_MS 10U
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extern volatile uint32_t PITCounter;
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typedef struct
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{
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timerCallback_t funPtr;
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uint32_t PIT_TriggerTime;
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} timerCallbackbackStruct_t;
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#define MAX_NUM_TIMER_CALLBACKS 8
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timerCallbackbackStruct_t callbacksArray[MAX_NUM_TIMER_CALLBACKS];// As a global this will get cleared by the compiler
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uint32_t fw_millis(void)
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{
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return (PITCounter / PIT_COUNTS_PER_MS);
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}
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void handleTimerCallbacks(void)
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{
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int i = 0;
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while((callbacksArray[i].funPtr != NULL) && (i < MAX_NUM_TIMER_CALLBACKS))
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{
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if (PITCounter > callbacksArray[i].PIT_TriggerTime)
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{
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callbacksArray[i].funPtr();// call the function
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memmove(&callbacksArray[i], &callbacksArray[i + 1], ((MAX_NUM_TIMER_CALLBACKS - 1) - i) * sizeof(timerCallbackbackStruct_t));
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callbacksArray[MAX_NUM_TIMER_CALLBACKS - 1].funPtr = NULL;
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}
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else
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{
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i++;
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}
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}
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}
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bool addTimerCallback(timerCallback_t funPtr, uint32_t delayIn_mS, bool updateExistingCallbackTime)
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{
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uint32_t callBackTime = PITCounter + (delayIn_mS * PIT_COUNTS_PER_MS);
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for(int i = 0; i < MAX_NUM_TIMER_CALLBACKS; i++)
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{
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if (callbacksArray[i].funPtr == NULL)
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{
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callbacksArray[i].funPtr = funPtr;
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callbacksArray[i].PIT_TriggerTime = callBackTime;
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return true;
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}
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if ((callbacksArray[i].funPtr == funPtr) && updateExistingCallbackTime)
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{
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callbacksArray[i].PIT_TriggerTime = callBackTime;
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return true;
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}
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// callbacksArray[i] must be non-null pointer
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if (callbacksArray[i].PIT_TriggerTime > callBackTime)
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{
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if (i != (MAX_NUM_TIMER_CALLBACKS - 1))
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{
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// shuffle all other callbacks down in the list if there is space
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memmove(&callbacksArray[i+1], &callbacksArray[i], ((MAX_NUM_TIMER_CALLBACKS - 1) - i) * sizeof(timerCallbackbackStruct_t));
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}
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callbacksArray[i].funPtr = funPtr;
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callbacksArray[i].PIT_TriggerTime = callBackTime;
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return true;
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}
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}
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return false;
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}
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