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FreeRTOS V8.0.1 - Copyright (C) 2014 Real Time Engineers Ltd.
All rights reserved
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* FreeRTOS provides completely free yet professionally developed, *
* robust, strictly quality controlled, supported, and cross *
* platform software that has become a de facto standard. *
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* Help yourself get started quickly and support the FreeRTOS *
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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 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. Full license text is available from the following
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* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong?" *
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*************************************************************************** - Documentation, books, training, latest versions,
license and Real Time Engineers Ltd. contact details. - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool, a DOS
compatible FAT file system, and our tiny thread aware UDP/IP stack. - Real Time Engineers ltd license FreeRTOS to High
Integrity Systems to sell under the OpenRTOS brand. Low cost OpenRTOS
licenses offer ticketed support, indemnification and middleware. - High Integrity Systems also provide a safety
engineered and independently SIL3 certified version for use in safety and
mission critical applications that require provable dependability.
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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 long ) 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 long 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 QueueHandle_t 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. */