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/*

    FreeRTOS V6.1.1 - Copyright (C) 2011 Real Time Engineers Ltd.

    ***************************************************************************

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    This file is part of the FreeRTOS distribution.

    FreeRTOS is free software; you can redistribute it and/or modify it under

    the terms of the GNU General Public License (version 2) as published by the

    Free Software Foundation AND MODIFIED BY the FreeRTOS exception.

    ***NOTE*** The exception to the GPL is included to allow you to distribute

    a combined work that includes FreeRTOS without being obliged to provide the

    source code for proprietary components outside of the FreeRTOS kernel.

    FreeRTOS is distributed in the hope that it will be useful, but WITHOUT

    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for

    more details. You should have received a copy of the GNU General Public

    License and the FreeRTOS license exception along with FreeRTOS; if not it

    can be viewed here: http://www.freertos.org/a00114.html and also obtained

    by writing to Richard Barry, contact details for whom are available on the

    FreeRTOS WEB site.

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*/

/*

 * This file contains the non-portable and therefore RX62N specific parts of

 * the IntQueue standard demo task - namely the configuration of the timers

 * that generate the interrupts and the interrupt entry points.

 */

/* Scheduler includes. */

#include "FreeRTOS.h"

#include "task.h"

/* Demo includes. */

#include "IntQueueTimer.h"

#include "IntQueue.h"

/* Hardware specifics. */

#include <iorx62n.h>

#define tmrTIMER_0_1_FREQUENCY  ( 2000UL )

#define tmrTIMER_2_3_FREQUENCY  ( 2001UL )

/* Handlers for the two timers used. */

__interrupt void vT0_1InterruptHandler( void );

__interrupt void vT2_3InterruptHandler( void );

void vInitialiseTimerForIntQueueTest( void )

{

        /* Ensure interrupts do not start until full configuration is complete. */

        portENTER_CRITICAL();

        {

                /* Cascade two 8bit timer channels to generate the interrupts.

                8bit timer unit 1 (TMR0 and TMR1) and 8bit timer unit 2 (TMR2 and TMR3 are

                utilised for this test. */

                /* Enable the timers. */

                SYSTEM.MSTPCRA.BIT.MSTPA5 = 0;

                SYSTEM.MSTPCRA.BIT.MSTPA4 = 0;

                /* Enable compare match A interrupt request. */

                TMR0.TCR.BIT.CMIEA = 1;

                TMR2.TCR.BIT.CMIEA = 1;

                /* Clear the timer on compare match A. */

                TMR0.TCR.BIT.CCLR = 1;

                TMR2.TCR.BIT.CCLR = 1;

                /* Set the compare match value. */

                TMR01.TCORA = ( unsigned short ) ( ( ( configPERIPHERAL_CLOCK_HZ / tmrTIMER_0_1_FREQUENCY ) -1 ) / 8 );

                TMR23.TCORA = ( unsigned short ) ( ( ( configPERIPHERAL_CLOCK_HZ / tmrTIMER_0_1_FREQUENCY ) -1 ) / 8 );

                /* 16 bit operation ( count from timer 1,2 ). */

                TMR0.TCCR.BIT.CSS = 3;

                TMR2.TCCR.BIT.CSS = 3;

                /* Use PCLK as the input. */

                TMR1.TCCR.BIT.CSS = 1;

                TMR3.TCCR.BIT.CSS = 1;

                /* Divide PCLK by 8. */

                TMR1.TCCR.BIT.CKS = 2;

                TMR3.TCCR.BIT.CKS = 2;

                /* Enable TMR 0, 2 interrupts. */

                IEN( TMR0, CMIA0 ) = 1;

                IEN( TMR2, CMIA2 ) = 1;

                /* Set the timer interrupts to be above the kernel.  The interrupts are

                assigned different priorities so they nest with each other. */

                IPR( TMR0, CMIA0 ) = configMAX_SYSCALL_INTERRUPT_PRIORITY - 1;

                IPR( TMR2, CMIA2 ) = ( configMAX_SYSCALL_INTERRUPT_PRIORITY - 2 );

        }

        portEXIT_CRITICAL();

        /* Ensure the interrupts are clear as they are edge detected. */

        IR( TMR0, CMIA0 ) = 0;

        IR( TMR2, CMIA2 ) = 0;

}

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

#pragma vector = VECT_TMR0_CMIA0

__interrupt void vT0_1InterruptHandler( void )

{

        __enable_interrupt();

        portYIELD_FROM_ISR( xFirstTimerHandler() );

}

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

#pragma vector = VECT_TMR2_CMIA2

__interrupt void vT2_3InterruptHandler( void )

{

        __enable_interrupt();

        portYIELD_FROM_ISR( xSecondTimerHandler() );

}