/* | |
FreeRTOS.org V5.1.2 - Copyright (C) 2003-2009 Richard Barry. | |
This file is part of the FreeRTOS.org distribution. | |
FreeRTOS.org is free software; you can redistribute it and/or modify | |
it under the terms of the GNU General Public License as published by | |
the Free Software Foundation; either version 2 of the License, or | |
(at your option) any later version. | |
FreeRTOS.org 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.org; if not, write to the Free Software | |
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
A special exception to the GPL can be applied should you wish to distribute | |
a combined work that includes FreeRTOS.org, without being obliged to provide | |
the source code for any proprietary components. See the licensing section | |
of http://www.FreeRTOS.org for full details of how and when the exception | |
can be applied. | |
*************************************************************************** | |
*************************************************************************** | |
* * | |
* Get the FreeRTOS eBook! See http://www.FreeRTOS.org/Documentation * | |
* * | |
* This is a concise, step by step, 'hands on' guide that describes both * | |
* general multitasking concepts and FreeRTOS specifics. It presents and * | |
* explains numerous examples that are written using the FreeRTOS API. * | |
* Full source code for all the examples is provided in an accompanying * | |
* .zip file. * | |
* * | |
*************************************************************************** | |
*************************************************************************** | |
Please ensure to read the configuration and relevant port sections of the | |
online documentation. | |
http://www.FreeRTOS.org - Documentation, latest information, license and | |
contact details. | |
http://www.SafeRTOS.com - A version that is certified for use in safety | |
critical systems. | |
http://www.OpenRTOS.com - Commercial support, development, porting, | |
licensing and training services. | |
*/ | |
#include "FreeRTOS.h" | |
#include "semphr.h" | |
#include "task.h" | |
/* Wrapper for the EMAC interrupt. */ | |
void vEMACISR_Wrapper( void ) __attribute__((naked)); | |
/* Handler called by the ISR wrapper. This must be kept a separate | |
function to ensure the stack frame is correctly set up. */ | |
void vEMACISR_Handler( void ); | |
static xSemaphoreHandle xEMACSemaphore; | |
/*-----------------------------------------------------------*/ | |
void vPassEMACSemaphore( xSemaphoreHandle xSemaphore ) | |
{ | |
xEMACSemaphore = xSemaphore; | |
} | |
/*-----------------------------------------------------------*/ | |
void vEMACISR_Handler( void ) | |
{ | |
volatile unsigned portLONG ulIntStatus, ulRxStatus; | |
portBASE_TYPE xHigherPriorityTaskWoken = pdFALSE; | |
ulIntStatus = AT91C_BASE_EMAC->EMAC_ISR; | |
ulRxStatus = AT91C_BASE_EMAC->EMAC_RSR; | |
if( ( ulIntStatus & AT91C_EMAC_RCOMP ) || ( ulRxStatus & AT91C_EMAC_REC ) ) | |
{ | |
/* A frame has been received, signal the uIP task so it can process | |
the Rx descriptors. */ | |
xSemaphoreGiveFromISR( xEMACSemaphore, &xHigherPriorityTaskWoken ); | |
AT91C_BASE_EMAC->EMAC_RSR = AT91C_EMAC_REC; | |
} | |
/* Clear the interrupt. */ | |
AT91C_BASE_AIC->AIC_EOICR = 0; | |
/* Switch to the uIP task. */ | |
if( xHigherPriorityTaskWoken ) | |
{ | |
/* If a task of higher priority than the interrupted task was | |
unblocked by the ISR then this call will ensure that the | |
unblocked task is the task the ISR returns to. */ | |
portYIELD_FROM_ISR(); | |
} | |
} | |
/*-----------------------------------------------------------*/ | |
void vEMACISR_Wrapper( void ) | |
{ | |
/* Save the context of the interrupted task. */ | |
portSAVE_CONTEXT(); | |
/* Call the handler task to do the actual work. This must be a separate | |
function to ensure the stack frame is correctly set up. */ | |
vEMACISR_Handler(); | |
/* Restore the context of whichever task is the next to run. */ | |
portRESTORE_CONTEXT(); | |
} | |