portable/WizC/PIC18/Drivers/Tick/isrTick.c

/*
 * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 *
 * SPDX-License-Identifier: MIT
 *
 * 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.
 *
 * https://www.FreeRTOS.org
 * https://github.com/FreeRTOS
 *
 */

/* 
Changes from V3.0.0
	+ ISRcode pulled inline to reduce stack-usage.

	+ Added functionality to only call vTaskSwitchContext() once
	  when handling multiple interruptsources in a single interruptcall.

	+ Filename changed to a .c extension to allow stepping through code
	  using F7.

Changes from V3.0.1
*/

/*
 * ISR for the tick.
 * This increments the tick count and, if using the preemptive scheduler, 
 * performs a context switch.  This must be identical to the manual 
 * context switch in how it stores the context of a task. 
 */

#ifndef _FREERTOS_DRIVERS_TICK_ISRTICK_C
#define _FREERTOS_DRIVERS_TICK_ISRTICK_C

{
	/*
	 * Was the interrupt the SystemClock?
	 */
	if( bCCP1IF && bCCP1IE )
	{
		/*
		 * Reset the interrupt flag
		 */
		bCCP1IF = 0;
	
		/*
	 	 * Maintain the tick count.
	 	 */
		if( xTaskIncrementTick() != pdFALSE )
		{
			/*
		 	 * Ask for a switch to the highest priority task
		 	 * that is ready to run.
		 	 */
			uxSwitchRequested = pdTRUE;
		}
	}
}

#pragma wizcpp uselib     "$__PATHNAME__/Tick.c"

#endif	/* _FREERTOS_DRIVERS_TICK_ISRTICK_C */