FreeRTOS-Kernel/Demo/CORTEX_A2F200_SoftConsole/ParTest.c

/*
    FreeRTOS V7.0.2 - 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 modification to the GPL is included to allow you to
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*/

/*-----------------------------------------------------------
 * Simple parallel port IO routines.
 *-----------------------------------------------------------*/

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

/* Library includes. */
#include "mss_gpio.h"

#define partstMAX_LEDS		8

static volatile unsigned long ulGPIOState = 0UL;

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

void vParTestInitialise( void )
{
long x;

	/* Initialise the GPIO */
	MSS_GPIO_init();

	/* Set up GPIO for the LEDs. */
	for( x = 0; x < partstMAX_LEDS; x++ )
	{
		MSS_GPIO_config( ( mss_gpio_id_t ) x , MSS_GPIO_OUTPUT_MODE );
	}

	/* All LEDs start off. */
	ulGPIOState = 0xffffffffUL;
	MSS_GPIO_set_outputs( ulGPIOState );
}
/*-----------------------------------------------------------*/

void vParTestSetLED( unsigned portBASE_TYPE uxLED, signed portBASE_TYPE xValue )
{
	if( uxLED < partstMAX_LEDS )
	{
		/* A critical section is used as the LEDs are also accessed from an
		interrupt. */
		taskENTER_CRITICAL();
		{
			if( xValue == pdTRUE )
			{
				ulGPIOState &= ~( 1UL << uxLED );
			}
			else
			{
				ulGPIOState |= ( 1UL << uxLED );
			}
			
			MSS_GPIO_set_outputs( ulGPIOState );
		}
		taskEXIT_CRITICAL();
	}
}
/*-----------------------------------------------------------*/

void vParTestSetLEDFromISR( unsigned portBASE_TYPE uxLED, signed portBASE_TYPE xValue )
{
unsigned portBASE_TYPE uxInterruptFlags;

	uxInterruptFlags = portSET_INTERRUPT_MASK_FROM_ISR();
	{
		if( uxLED < partstMAX_LEDS )
		{
			if( xValue == pdTRUE )
			{
				ulGPIOState &= ~( 1UL << uxLED );
			}
			else
			{
				ulGPIOState |= ( 1UL << uxLED );
			}

			MSS_GPIO_set_outputs( ulGPIOState );
		}
	}
	portCLEAR_INTERRUPT_MASK_FROM_ISR( uxInterruptFlags );
}
/*-----------------------------------------------------------*/

void vParTestToggleLED( unsigned portBASE_TYPE uxLED )
{
	if( uxLED < partstMAX_LEDS )
	{
		/* A critical section is used as the LEDs are also accessed from an
		interrupt. */
		taskENTER_CRITICAL();
		{
			if( ( ulGPIOState & ( 1UL << uxLED ) ) != 0UL )
			{
				ulGPIOState &= ~( 1UL << uxLED );
			}
			else
			{
				ulGPIOState |= ( 1UL << uxLED );
			}
			
			MSS_GPIO_set_outputs( ulGPIOState );
		}
		taskEXIT_CRITICAL();
	}
}
/*-----------------------------------------------------------*/

long lParTestGetLEDState( unsigned long ulLED )
{
long lReturn = pdFALSE;

	if( ulLED < partstMAX_LEDS )
	{
		taskENTER_CRITICAL();
		{
			if( ( ulGPIOState & ( 1UL << ulLED ) ) == 0UL )
			{
				lReturn = pdTRUE;
			}
		}
		taskEXIT_CRITICAL();
	}

	return lReturn;
}
/*-----------------------------------------------------------*/