amt630h-sdk-beta/amt630h-freertos/FreeRTOS_tick_config.c

/*
 * FreeRTOS V202104.00
 * Copyright (C) 2020 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 *
 * 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.
 *
 * http://www.FreeRTOS.org
 * http://aws.amazon.com/freertos
 *
 * 1 tab == 4 spaces!
 */

/* FreeRTOS includes. */
#include "FreeRTOS.h"
#include "task.h"

/* Library includes. */
#include "board.h"
#include "chip.h"

/*
 * The FreeRTOS tick handler.  This function must be installed as the handler
 * for the timer used to generate the tick interrupt.  Note that the interrupt
 * generated by the PIT is shared by other system peripherals, so if the PIT is
 * used for Tick generation then FreeRTOS_Tick_Handler() can only be installed
 * directly as the PIT handler if no other system interrupts need to be
 * serviced.  If system interrupts other than the PIT need to be serviced then
 * install System_Handler() as the PIT interrupt handler in place of
 * FreeRTOS_Tick_Handler() and add additional interrupt processing into the
 * implementation of System_Handler().
 */
extern void FreeRTOS_Tick_Handler( void );

/*-----------------------------------------------------------*/

static void System_Handler( void *para )
{
	vTimerClrInt((uint32_t)para);
	
	/* See the comments above the function prototype in this file. */
	FreeRTOS_Tick_Handler();
}
/*-----------------------------------------------------------*/

/*
 * The application must provide a function that configures a peripheral to
 * create the FreeRTOS tick interrupt, then define configSETUP_TICK_INTERRUPT()
 * in FreeRTOSConfig.h to call the function.  This file contains a function
 * that is suitable for use on the Atmel SAMA5.
 */
void vConfigureTickInterrupt( void )
{
	vTimerInit(TIMER_ID0, 1, 1, configTICK_RATE_HZ);
	vTimerEnable(TIMER_ID0);
	request_irq(TIMER0_IRQn, 0, System_Handler, (void*)TIMER_ID0);
	AIC_EnableIT(TIMER0_IRQn);

	/* Prevent compiler warnings in the case where System_Handler() is not used
	as the handler.  See the comments above the System_Handler() function
	prototype at the top of this file. */
	( void ) System_Handler;

}
/*-----------------------------------------------------------*/