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FreeRTOS V5.4.2 - Copyright (C) 2009 Real Time Engineers Ltd.
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.
Alternative commercial license and support terms are also available upon
request. See the licensing section of for full
license details.
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 along
with FreeRTOS; if not, write to the Free Software Foundation, Inc., 59
Temple Place, Suite 330, Boston, MA 02111-1307 USA.
* *
* Looking for a quick start? Then check out the FreeRTOS eBook! *
* See for details *
* *
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Please ensure to read the configuration and relevant port sections of the
online documentation. - Documentation, latest information, license and
contact details. - A version that is certified for use in safety
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/* Scheduler include files. */
#include "FreeRTOS.h"
#include "task.h"
#include "queue.h"
/* Constants required for interrupt management. */
#define tcpCLEAR_VIC_INTERRUPT ( 0 )
#define tcpEINT0_VIC_CHANNEL_BIT ( ( unsigned portLONG ) 0x4000 )
/* EINT0 interrupt handler. This processes interrupts from the WIZnet device. */
void vEINT0_ISR_Wrapper( void ) __attribute__((naked));
/* The handler that goes with the EINT0 wrapper. */
void vEINT0_ISR_Handler( void );
/* Variable is required for its address, but does not otherwise get used. */
static portLONG lDummyVariable;
* When the WIZnet device asserts an interrupt we send an (empty) message to
* the TCP task. This wakes the task so the interrupt can be processed. The
* source of the interrupt has to be ascertained by the TCP task as this
* requires an I2C transaction which cannot be performed from this ISR.
* Note this code predates the introduction of semaphores, a semaphore should
* be used in place of the empty queue message.
void vEINT0_ISR_Handler( void )
extern xQueueHandle xTCPISRQueue;
portBASE_TYPE xHigherPriorityTaskWoken = pdFALSE;
/* Just wake the TCP task so it knows an ISR has occurred. */
xQueueSendFromISR( xTCPISRQueue, ( void * ) &lDummyVariable, &xHigherPriorityTaskWoken );
/* We cannot carry on processing interrupts until the TCP task has
processed this one - so for now interrupts are disabled. The TCP task will
re-enable it. */
/* Clear the interrupt bit. */
if( xHigherPriorityTaskWoken )
void vEINT0_ISR_Wrapper( void )
/* Save the context of the interrupted task. */
/* The handler must be a separate function from the wrapper to
ensure the correct stack frame is set up. */
/* Restore the context of whichever task is going to run next. */