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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
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    Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception.

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    ***************************************************************************
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*/

/*-----------------------------------------------------------
 * Simple digital IO routines.
 *-----------------------------------------------------------*/

/* Kernel includes. */
#include "FreeRTOS.h"

/* Demo application includes. */
#include "partest.h"

/* Library includes. */
#include "xgpio.h"

/* The hardware design that accompanies this demo project has four LED 
outputs. */
#define partstMAX_LED	4

/*-----------------------------------------------------------*/

/* A hardware specific constant required to use the Xilinx driver library. */
static const unsigned portBASE_TYPE uxGPIOOutputChannel = 1UL;

/* The current state of the output port. */
static unsigned char ucGPIOState = 0U;

/* Structure that hold the state of the ouptut peripheral used by this demo.
This is used by the Xilinx peripheral driver API functions. */
static XGpio xOutputGPIOInstance;

/*
 * Setup the IO for the LED outputs.
 */
void vParTestInitialise( void )
{
portBASE_TYPE xStatus;
const unsigned char ucSetToOutput = 0U;

	/* Initialise the GPIO for the LEDs. */
	xStatus = XGpio_Initialize( &xOutputGPIOInstance, XPAR_LEDS_4BITS_DEVICE_ID );
	if( xStatus == XST_SUCCESS )
	{
		/* All bits on this channel are going to be outputs (LEDs). */
		XGpio_SetDataDirection( &xOutputGPIOInstance, uxGPIOOutputChannel, ucSetToOutput );

		/* Start with all LEDs off. */
		ucGPIOState = 0U;
		XGpio_DiscreteWrite( &xOutputGPIOInstance, uxGPIOOutputChannel, ucGPIOState );
	}
	
	configASSERT( xStatus == XST_SUCCESS );
}
/*-----------------------------------------------------------*/

void vParTestSetLED( unsigned portBASE_TYPE uxLED, signed portBASE_TYPE xValue )
{
unsigned char ucLED = 1U;

	/* Only attempt to set the LED if it is in range. */
	if( uxLED < partstMAX_LED )
	{
		ucLED <<= ( unsigned char ) uxLED;

		portENTER_CRITICAL();
		{
			if( xValue == pdFALSE )
			{
				ucGPIOState &= ~ucLED;
			}
			else
			{
				ucGPIOState |= ucLED;
			}
			XGpio_DiscreteWrite( &xOutputGPIOInstance, uxGPIOOutputChannel, ucGPIOState );
		}
		portEXIT_CRITICAL();
	}
}
/*-----------------------------------------------------------*/

void vParTestToggleLED( unsigned portBASE_TYPE uxLED )
{
unsigned char ucLED = 1U;

	/* Only attempt to toggle the LED if it is in range. */
	if( uxLED < partstMAX_LED )
	{
		ucLED <<= ( unsigned char ) uxLED;

		portENTER_CRITICAL();
		{
			if( ( ucGPIOState & ucLED ) != 0 )
			{
				ucGPIOState &= ~ucLED;
			}
			else
			{
				ucGPIOState |= ucLED;
			}

			XGpio_DiscreteWrite( &xOutputGPIOInstance, uxGPIOOutputChannel, ucGPIOState );
		}
		portEXIT_CRITICAL();
	}
}