FreeRTOS-Kernel/FreeRTOS/Demo/RL78_multiple_IAR/main.c

/*
    FreeRTOS V7.4.2 - Copyright (C) 2013 Real Time Engineers Ltd.

    FEATURES AND PORTS ARE ADDED TO FREERTOS ALL THE TIME.  PLEASE VISIT
    http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.

    ***************************************************************************
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     *    professional grade, cross platform, de facto standard solutions    *
     *    for microcontrollers - completely free of charge!                  *
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     *    >>> See http://www.FreeRTOS.org/Documentation for details. <<<     *
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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.

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    ***************************************************************************
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*/

/******************************************************************************
 * This project provides two demo applications.  A simple blinky style project,
 * and a more comprehensive test and demo application.  The
 * mainCREATE_SIMPLE_BLINKY_DEMO_ONLY setting (defined in this file) is used to
 * select between the two.  The simply blinky demo is implemented and described
 * in main_blinky.c.  The more comprehensive test and demo application is
 * implemented and described in main_full.c.
 *
 * This file implements the code that is not demo specific, including the
 * hardware setup and FreeRTOS hook functions.
 *
 * This project does not provide an example of how to write an RTOS compatible
 * interrupt service routine (other than the tick interrupt itself), so this
 * file contains the function vAnExampleISR_C_Handler() as a dummy example (that
 * is not actually installed) that can be used as a reference.  Also see the
 * file ExampleISR.s87, and the documentation page for this demo on the
 * FreeRTOS.org website for full instructions.
 *
 * ENSURE TO READ THE DOCUMENTATION PAGE FOR THIS PORT AND DEMO APPLICATION ON
 * THE http://www.FreeRTOS.org WEB SITE FOR FULL INFORMATION ON USING THIS DEMO
 * APPLICATION, AND ITS ASSOCIATE FreeRTOS ARCHITECTURE PORT!
 *
 */

/* Scheduler include files. */
#include "FreeRTOS.h"
#include "task.h"
#include "semphr.h"

/* Hardware includes. */
#include "demo_specific_io.h"

/* Set mainCREATE_SIMPLE_BLINKY_DEMO_ONLY to one to run the simple blinky demo,
or 0 to run the more comprehensive test and demo application. */
#define mainCREATE_SIMPLE_BLINKY_DEMO_ONLY	1

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

/*
 * main_blinky() is used when mainCREATE_SIMPLE_BLINKY_DEMO_ONLY is set to 1.
 * main_full() is used when mainCREATE_SIMPLE_BLINKY_DEMO_ONLY is set to 0.
 */
extern void main_blinky( void );
extern void main_full( void );

/*
 * This function is called from the C startup routine to setup the processor -
 * in particular the clock source.
 */
int __low_level_init(void);

/* Prototypes for the standard FreeRTOS callback/hook functions implemented
within this file. */
void vApplicationMallocFailedHook( void );
void vApplicationIdleHook( void );
void vApplicationStackOverflowHook( xTaskHandle pxTask, signed char *pcTaskName );
void vApplicationTickHook( void );

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

/* This variable is not actually used, but provided to allow an example of how
to write an ISR to be included in this file. */
static xSemaphoreHandle xSemaphore = NULL;

/* RL78 Option Byte Definition. Watchdog disabled, LVI enabled, OCD interface
enabled. */
__root __far const unsigned char OptionByte[] @ 0x00C0 =
{
	0x6eU, 0xffU, 0xe8U, 0x85U
};

/* Security byte definition */
__root __far const unsigned char ucSecurityCode[]  @ 0x00C4 =
{
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};

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

void main( void )
{
	/* The mainCREATE_SIMPLE_BLINKY_DEMO_ONLY setting is described at the top
	of this file. */
	#if mainCREATE_SIMPLE_BLINKY_DEMO_ONLY == 1
	{
		main_blinky();
	}
	#else
	{
		main_full();
	}
	#endif
}
/*-----------------------------------------------------------*/

void vAnExampleISR_C_Handler( void )
{
	/*
	 * This demo does not include a functional interrupt service routine - so
	 * this dummy handler (which is not actually installed) is provided as an
	 * example of how an ISR that needs to cause a context switch needs to be
	 * implemented.  ISRs that do not cause a context switch have no special
	 * requirements and can be written as per the compiler documentation.
	 *
	 * This C function is called from a wrapper function that is implemented
	 * in assembly code.  See vANExampleISR_ASM_Wrapper() in ExampleISR.s87.
	 * Also see the documentation page for this demo on the FreeRTOS.org website
	 * for full instructions.
	 */
short sHigherPriorityTaskWoken = pdFALSE;

	/* Handler code goes here...*/

	/* For purposes of demonstration, assume at some point the hander calls
	xSemaphoreGiveFromISR().*/
	xSemaphoreGiveFromISR( xSemaphore, &sHigherPriorityTaskWoken );

	/* If giving the semaphore unblocked a task, and the unblocked task has a
	priority higher than or equal to the currently running task, then
	sHigherPriorityTaskWoken will have been set to pdTRUE internally within the
	xSemaphoreGiveFromISR() function.  Passing a pdTRUE	value to
	portYIELD_FROM_ISR() will cause this interrupt to return directly to the
	higher priority unblocked task. */
	portYIELD_FROM_ISR( sHigherPriorityTaskWoken );
}
/*-----------------------------------------------------------*/

int __low_level_init(void)
{
	portDISABLE_INTERRUPTS();

	/* Set fMX */
	CMC = 0x00;
	MSTOP = 1U;

	/* Set fMAIN */
	MCM0 = 0U;

	/* Set fSUB */
	XTSTOP = 1U;
	OSMC = 0x10;

	/* Set fCLK */
	CSS = 0U;

	/* Set fIH */
	HIOSTOP = 0U;

	/* LED port initialization. */
	LED_INIT();

	return pdTRUE;
}
/*-----------------------------------------------------------*/

void vApplicationMallocFailedHook( void )
{
	/* Called if a call to pvPortMalloc() fails because there is insufficient
	free memory available in the FreeRTOS heap.  pvPortMalloc() is called
	internally by FreeRTOS API functions that create tasks, queues, software
	timers, and semaphores.  The size of the FreeRTOS heap is set by the
	configTOTAL_HEAP_SIZE configuration constant in FreeRTOSConfig.h. */
	taskDISABLE_INTERRUPTS();
	for( ;; );
}
/*-----------------------------------------------------------*/

void vApplicationStackOverflowHook( xTaskHandle pxTask, signed char *pcTaskName )
{
	( void ) pcTaskName;
	( void ) pxTask;

	/* Run time stack overflow checking is performed if
	configCHECK_FOR_STACK_OVERFLOW is defined to 1 or 2.  This hook
	function is called if a stack overflow is detected. */
	taskDISABLE_INTERRUPTS();
	for( ;; );
}
/*-----------------------------------------------------------*/

void vApplicationIdleHook( void )
{
volatile size_t xFreeHeapSpace;

	/* This is just a trivial example of an idle hook.  It is called on each
	cycle of the idle task.  It must *NOT* attempt to block.  In this case the
	idle task just queries the amount of FreeRTOS heap that remains.  See the
	memory management section on the http://www.FreeRTOS.org web site for memory
	management options.  If there is a lot of heap memory free then the
	configTOTAL_HEAP_SIZE value in FreeRTOSConfig.h can be reduced to free up
	RAM. */
	xFreeHeapSpace = xPortGetFreeHeapSize();

	/* Remove compiler warning about xFreeHeapSpace being set but never used. */
	( void ) xFreeHeapSpace;
}