/*
    FreeRTOS V6.1.0 - Copyright (C) 2010 Real Time Engineers Ltd.

    ***************************************************************************
    *                                                                         *
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    *    + New to FreeRTOS,                                                   *
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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.

    1 tab == 4 spaces!

    http://www.FreeRTOS.org - Documentation, latest information, license and
    contact details.

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*/


/*****
 *
 * See http://www.freertos.org/Documentation/FreeRTOS-documentation-and-book.html
 * for an introductory guide to using real time kernels, and FreeRTOS in 
 * particular. 
 *
 *****
 *  
 * The DICE-KIT-16FX has two 7 segment displays and two buttons that can
 * generate interrupts.  This example uses this IO as follows:
 *
 *
 * - Left 7 segment display - 
 *
 * 7 'flash' tasks are created, each of which toggles a single segment of the 
 * left display.  Each task executes at a fixed frequency, with a different 
 * frequency being used by each task.
 *
 * When button SW2 is pressed an interrupt is generated that wakes up a 'dice'
 * task.  The dice task suspends the 7 tasks that are accessing the left display
 * before simulating a dice being thrown by generating a random number between
 * 1 and 6.  After the number has been generated the task sleeps for 5 seconds,
 * if SW2 is pressed again within the 5 seconds another random number is 
 * generated, if SW2 is not pressed within the 5 seconds then the 7 tasks are
 * un-suspended and will once again toggle the segments of the left hand display.
 *
 *
 * - Right 7 segment display -
 *
 * Control of the right side 7 segment display is very similar to that of the
 * left, except co-routines are used to toggle the segments instead of tasks,
 * and button SW3 is used instead of SW2.
 *
 *
 * - Notes -
 *
 * Only one dice task is actually defined.  Two instances of this single
 * definition are created, the first to simulate a dice being thrown on the left
 * display, and the other to simulate a dice being thrown on the right display.
 * The task parameter is used to let the dice tasks know which display to 
 * control.
 *
 * Both dice tasks and the flash tasks operate completely independently under
 * the control of FreeRTOS.  11 tasks and 7 co-routines are created in total,
 * including the idle task. 
 *
 * The co-routines all execute within a single low priority task.
 *
 *
 *
 * When this demo is executing as expected:
 *
 * + Every segment of both displays will toggle at a fixed frequency - with each
 *   segment using a different frequency.
 * + When a button is pushed the segment toggling will temporarily stop and the
 *   dice 'throw' will start whereby the display will show a fast changing random
 *   number for a few seconds before the dice value is chosen and displayed.
 * + If the button is not pushed again within five seconds of the dice value being
 *   displayed the segment toggling will commence again.
 *
 *****/

/* Kernel includes. */
#include "FreeRTOS.h"
#include "Task.h"

/* Demo includes. */
#include "DiceTask.h"
#include "ParTest.h"
#include "Flash.h"

/* The priority at which the dice task execute. */
#define mainDICE_PRIORITY			( tskIDLE_PRIORITY + 2 )

/*
 * Sets up the MCU IO for the 7 segment displays and the button inputs.
 */
static void prvSetupHardware( void );

/*
 * The function that creates the flash tasks and co-routines (the tasks and
 * co-routines that toggle the 7 segment display segments.
 */
extern vCreateFlashTasksAndCoRoutines( void );

/*-----------------------------------------------------------*/

void main( void )
{
	/* Setup the MCU IO. */
	prvSetupHardware();

	/* Create the tasks and co-routines that toggle the display segments. */
	vCreateFlashTasksAndCoRoutines();

	/* Create a 'dice' task to control the left hand display. */
	xTaskCreate( vDiceTask, ( signed char * ) "Dice1", configMINIMAL_STACK_SIZE, ( void * ) configLEFT_DISPLAY, mainDICE_PRIORITY, NULL );

	/* Create a 'dice' task to control the right hand display. */
	xTaskCreate( vDiceTask, ( signed char * ) "Dice2", configMINIMAL_STACK_SIZE, ( void * ) configRIGHT_DISPLAY, mainDICE_PRIORITY, NULL );

	/* Start the scheduler running. */
	vTaskStartScheduler();

	/* If this loop is executed then there was insufficient heap memory for the
	idle task to be created - causing vTaskStartScheduler() to return. */
	while( 1 );
}
/*-----------------------------------------------------------*/

static void prvSetupHardware( void )
{
	/* Setup interrupt hardware - interrupts are kept disabled for now to
	prevent any interrupts attempting to cause a context switch before the
	scheduler has been started. */
	InitIrqLevels();
	portDISABLE_INTERRUPTS();
	__set_il( 7 );	

	/* Set Port3 as output (7Segment Display). */
	DDR03  = 0xff;

	/* Use Port 5 as I/O-Port. */
	ADER1  = 0;
	PDR05  = 0x7f;

	/* Set Port5 as output (7Segment Display). */
	DDR05  = 0xff;

	/* Disable inputs on the following ports. */
	PIER02 = 0x00;
	PDR02  = 0x00;
	DDR02  = 0xff;
	PIER03 = 0x00;
	PDR03  = 0xff;
	PIER05 = 0x00;
	PDR05  = 0x00;
	PIER06 = 0x00;
	PDR06  = 0x00;
	DDR06  = 0xff;

	/* Enable P00_0/INT8 and P00_1/INT9 as input. */
	PIER00 = 0x03;

	/* Enable external interrupt 8. */
	PIER00_IE0 = 1;
	
	/* LB0, LA0 = 11 -> falling edge. */
	ELVRL1_LB8 = 1;
	ELVRL1_LA8 = 1;

	/* Reset and enable the interrupt request. */
	EIRR1_ER8 = 0;
	ENIR1_EN8 = 1;

	/* Enable external interrupt 9. */
	PIER00_IE1 = 1;
	
	/* LB1, LA1 = 11 -> falling edge. */
	ELVRL1_LB9 = 1;
	ELVRL1_LA9 = 1;

	/* Reset and enable the interrupt request. */
	EIRR1_ER9 = 0;
	ENIR1_EN9 = 1;	
}