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jeremybenn |
/*
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FreeRTOS V6.1.1 - Copyright (C) 2011 Real Time Engineers Ltd.
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***************************************************************************
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* *
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* If you are: *
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* *
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* + New to FreeRTOS, *
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* + Wanting to learn FreeRTOS or multitasking in general quickly *
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* + Looking for basic training, *
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* + Wanting to improve your FreeRTOS skills and productivity *
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* *
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* then take a look at the FreeRTOS books - available as PDF or paperback *
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* *
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* "Using the FreeRTOS Real Time Kernel - a Practical Guide" *
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* http://www.FreeRTOS.org/Documentation *
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* *
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* A pdf reference manual is also available. Both are usually delivered *
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* to your inbox within 20 minutes to two hours when purchased between 8am *
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* and 8pm GMT (although please allow up to 24 hours in case of *
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* exceptional circumstances). Thank you for your support! *
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* *
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***************************************************************************
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This file is part of the FreeRTOS distribution.
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FreeRTOS is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License (version 2) as published by the
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Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
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***NOTE*** The exception to the GPL is included to allow you to distribute
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a combined work that includes FreeRTOS without being obliged to provide the
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source code for proprietary components outside of the FreeRTOS kernel.
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FreeRTOS is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details. You should have received a copy of the GNU General Public
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License and the FreeRTOS license exception along with FreeRTOS; if not it
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can be viewed here: http://www.freertos.org/a00114.html and also obtained
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by writing to Richard Barry, contact details for whom are available on the
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FreeRTOS WEB site.
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1 tab == 4 spaces!
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http://www.FreeRTOS.org - Documentation, latest information, license and
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contact details.
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http://www.SafeRTOS.com - A version that is certified for use in safety
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critical systems.
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http://www.OpenRTOS.com - Commercial support, development, porting,
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licensing and training services.
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*/
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/*-----------------------------------------------------------
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* Simple parallel port IO routines.
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*-----------------------------------------------------------*/
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/* Kernel includes. */
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#include "FreeRTOS.h"
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/* Demo application includes. */
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#include "partest.h"
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/* Library includes. */
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#include "xgpio_l.h"
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/* Misc hardware specific definitions. */
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#define partstALL_AS_OUTPUT 0x00
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#define partstCHANNEL_1 0x01
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#define partstMAX_4BIT_LED 0x03
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/* The outputs are split into two IO sections, these variables maintain the
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current value of either section. */
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static unsigned portBASE_TYPE uxCurrentOutput4Bit, uxCurrentOutput5Bit;
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/*-----------------------------------------------------------*/
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/*
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* Setup the IO for the LED outputs.
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*/
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void vParTestInitialise( void )
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{
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/* Set both sets of LED's on the demo board to outputs. */
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XGpio_mSetDataDirection( XPAR_LEDS_4BIT_BASEADDR, partstCHANNEL_1, partstALL_AS_OUTPUT );
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XGpio_mSetDataDirection( XPAR_LEDS_POSITIONS_BASEADDR, partstCHANNEL_1, partstALL_AS_OUTPUT );
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/* Start with all outputs off. */
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uxCurrentOutput4Bit = 0;
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XGpio_mSetDataReg( XPAR_LEDS_4BIT_BASEADDR, partstCHANNEL_1, 0x00 );
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uxCurrentOutput5Bit = 0;
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XGpio_mSetDataReg( XPAR_LEDS_POSITIONS_BASEADDR, partstCHANNEL_1, 0x00 );
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}
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/*-----------------------------------------------------------*/
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void vParTestSetLED( unsigned portBASE_TYPE uxLED, signed portBASE_TYPE xValue )
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{
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unsigned portBASE_TYPE uxBaseAddress, *puxCurrentValue;
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portENTER_CRITICAL();
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{
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/* Which IO section does the LED being set/cleared belong to? The
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4 bit or 5 bit outputs? */
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if( uxLED <= partstMAX_4BIT_LED )
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{
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uxBaseAddress = XPAR_LEDS_4BIT_BASEADDR;
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puxCurrentValue = &uxCurrentOutput4Bit;
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}
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else
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{
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uxBaseAddress = XPAR_LEDS_POSITIONS_BASEADDR;
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puxCurrentValue = &uxCurrentOutput5Bit;
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uxLED -= partstMAX_4BIT_LED;
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}
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/* Setup the bit mask accordingly. */
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uxLED = 0x01 << uxLED;
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/* Maintain the current output value. */
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if( xValue )
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{
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*puxCurrentValue |= uxLED;
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}
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else
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{
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*puxCurrentValue &= ~uxLED;
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}
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/* Write the value to the port. */
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XGpio_mSetDataReg( uxBaseAddress, partstCHANNEL_1, *puxCurrentValue );
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}
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portEXIT_CRITICAL();
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}
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/*-----------------------------------------------------------*/
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void vParTestToggleLED( unsigned portBASE_TYPE uxLED )
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{
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unsigned portBASE_TYPE uxBaseAddress, *puxCurrentValue;
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portENTER_CRITICAL();
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{
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/* Which IO section does the LED being toggled belong to? The
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4 bit or 5 bit outputs? */
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if( uxLED <= partstMAX_4BIT_LED )
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{
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uxBaseAddress = XPAR_LEDS_4BIT_BASEADDR;
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puxCurrentValue = &uxCurrentOutput4Bit;
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}
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else
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{
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uxBaseAddress = XPAR_LEDS_POSITIONS_BASEADDR;
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puxCurrentValue = &uxCurrentOutput5Bit;
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uxLED -= partstMAX_4BIT_LED;
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}
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/* Setup the bit mask accordingly. */
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uxLED = 0x01 << uxLED;
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/* Maintain the current output value. */
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if( *puxCurrentValue & uxLED )
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{
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*puxCurrentValue &= ~uxLED;
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}
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else
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{
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*puxCurrentValue |= uxLED;
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}
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/* Write the value to the port. */
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XGpio_mSetDataReg(uxBaseAddress, partstCHANNEL_1, *puxCurrentValue );
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}
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portEXIT_CRITICAL();
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}
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