/* | |
FreeRTOS V6.0.3 - Copyright (C) 2010 Real Time Engineers Ltd. | |
*************************************************************************** | |
* * | |
* If you are: * | |
* * | |
* + New to FreeRTOS, * | |
* + Wanting to learn FreeRTOS or multitasking in general quickly * | |
* + Looking for basic training, * | |
* + Wanting to improve your FreeRTOS skills and productivity * | |
* * | |
* then take a look at the FreeRTOS eBook * | |
* * | |
* "Using the FreeRTOS Real Time Kernel - a Practical Guide" * | |
* http://www.FreeRTOS.org/Documentation * | |
* * | |
* A pdf reference manual is also available. Both are usually delivered * | |
* to your inbox within 20 minutes to two hours when purchased between 8am * | |
* and 8pm GMT (although please allow up to 24 hours in case of * | |
* exceptional circumstances). Thank you for your support! * | |
* * | |
*************************************************************************** | |
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. | |
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 ) __attribute__((noinline)); | |
static xSemaphoreHandle xEMACSemaphore; | |
/*-----------------------------------------------------------*/ | |
void vPassEMACSemaphore( xSemaphoreHandle xSemaphore ) | |
{ | |
xEMACSemaphore = xSemaphore; | |
} | |
/*-----------------------------------------------------------*/ | |
void vEMACISR_Handler( void ) | |
{ | |
volatile unsigned long 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. */ | |
__asm volatile ("bl vEMACISR_Handler"); | |
/* Restore the context of whichever task is the next to run. */ | |
portRESTORE_CONTEXT(); | |
} | |