Subversion Repositories openrisc_2011-10-31

/*

    FreeRTOS V6.1.1 - 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 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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*/

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

 * Simple parallel port IO routines.

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

/* Kernel includes. */

#include "FreeRTOS.h"

/* Demo application includes. */

#include "partest.h"

/* Library includes. */

#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 = &uxCurrentOutput4Bit;

                }

                else

                {

                        uxBaseAddress = XPAR_LEDS_POSITIONS_BASEADDR;

                        puxCurrentValue = &uxCurrentOutput5Bit;

                        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 = &uxCurrentOutput4Bit;

                }

                else

                {

                        uxBaseAddress = XPAR_LEDS_POSITIONS_BASEADDR;

                        puxCurrentValue = &uxCurrentOutput5Bit;

                        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();

}