Demo/PPC405_FPU_Xilinx_Virtex4_GCC/RTOSDemo/partest/partest.c

/*
    FreeRTOS V7.0.2 - Copyright (C) 2011 Real Time Engineers Ltd.
	

    ***************************************************************************
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     *    for microcontrollers - completely free of charge!                  *
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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
    distribute a combined work that includes FreeRTOS without being obliged to
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    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
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*/


/* Scheduler includes. */
#include "FreeRTOS.h"

/* Demo application includes. */
#include "partest.h"

/* Library includes. */
#include "xparameters.h"
#include "xgpio_l.h"

/* Misc hardware specific definitions. */
#define partstALL_AS_OUTPUT	0x00
#define partstCHANNEL_1		0x01
#define partstMAX_4BIT_LED	0x03

/* The outputs are split into two IO sections, these variables maintain the 
current value of either section. */
static unsigned portBASE_TYPE uxCurrentOutput4Bit, uxCurrentOutput5Bit;

/*-----------------------------------------------------------*/
/*
 * Setup the IO for the LED outputs.
 */
void vParTestInitialise( void )
{
	/* Set both sets of LED's on the demo board to outputs. */
	XGpio_mSetDataDirection( XPAR_LEDS_4BIT_BASEADDR, partstCHANNEL_1, partstALL_AS_OUTPUT );
	XGpio_mSetDataDirection( XPAR_LEDS_POSITIONS_BASEADDR, partstCHANNEL_1, partstALL_AS_OUTPUT );

	/* Start with all outputs off. */
	uxCurrentOutput4Bit = 0;
	XGpio_mSetDataReg( XPAR_LEDS_4BIT_BASEADDR, partstCHANNEL_1, 0x00 );
	uxCurrentOutput5Bit = 0;
	XGpio_mSetDataReg( XPAR_LEDS_POSITIONS_BASEADDR, partstCHANNEL_1, 0x00 );
}
/*-----------------------------------------------------------*/

void vParTestSetLED( unsigned portBASE_TYPE uxLED, signed portBASE_TYPE xValue )
{
unsigned portBASE_TYPE uxBaseAddress, *puxCurrentValue;

	portENTER_CRITICAL();
	{
		/* Which IO section does the LED being set/cleared belong to?  The
		4 bit or 5 bit outputs? */
		if( uxLED <= partstMAX_4BIT_LED )
		{
			uxBaseAddress = XPAR_LEDS_4BIT_BASEADDR;
			puxCurrentValue = &uxCurrentOutput5Bit;
		}	
		else
		{
			uxBaseAddress = XPAR_LEDS_POSITIONS_BASEADDR;
			puxCurrentValue = &uxCurrentOutput4Bit;
			uxLED -= partstMAX_4BIT_LED;
		}

		/* Setup the bit mask accordingly. */
		uxLED = 0x01 << uxLED;

		/* Maintain the current output value. */
		if( xValue )
		{
			*puxCurrentValue |= uxLED;
		}
		else
		{
			*puxCurrentValue &= ~uxLED;
		}

		/* Write the value to the port. */
		XGpio_mSetDataReg( uxBaseAddress, partstCHANNEL_1, *puxCurrentValue );
	}
	portEXIT_CRITICAL();
}
/*-----------------------------------------------------------*/

void vParTestToggleLED( unsigned portBASE_TYPE uxLED )
{
unsigned portBASE_TYPE uxBaseAddress, *puxCurrentValue;

	portENTER_CRITICAL();
	{
		/* Which IO section does the LED being toggled belong to?  The
		4 bit or 5 bit outputs? */
		if( uxLED <= partstMAX_4BIT_LED )
		{

			uxBaseAddress = XPAR_LEDS_4BIT_BASEADDR;
			puxCurrentValue = &uxCurrentOutput5Bit;
		}	
		else
		{
			uxBaseAddress = XPAR_LEDS_POSITIONS_BASEADDR;
			puxCurrentValue = &uxCurrentOutput4Bit;
			uxLED -= partstMAX_4BIT_LED;
		}

		/* Setup the bit mask accordingly. */
		uxLED = 0x01 << uxLED;

		/* Maintain the current output value. */
		if( *puxCurrentValue & uxLED )
		{
			*puxCurrentValue &= ~uxLED;
		}
		else
		{
			*puxCurrentValue |= uxLED;
		}

		/* Write the value to the port. */
		XGpio_mSetDataReg(uxBaseAddress, partstCHANNEL_1, *puxCurrentValue );
	}
	portEXIT_CRITICAL();
}