mirror of
https://github.com/FreeRTOS/FreeRTOS-Kernel.git
synced 2025-08-19 09:38:32 -04:00
Add FreeRTOS-Plus directory with new directory structure so it matches the FreeRTOS directory.
This commit is contained in:
Richard Barry
parent
80f7e8cdd4
commit
64a3ab321a
528 changed files with 228252 additions and 0 deletions
|
|
@ -0,0 +1,277 @@
|
|||
/*
|
||||
* FreeRTOS+UDP V1.0.0 (C) 2013 Real Time Engineers ltd.
|
||||
*
|
||||
* FreeRTOS+UDP is an add-on component to FreeRTOS. It is not, in itself, part
|
||||
* of the FreeRTOS kernel. FreeRTOS+UDP is licensed separately from FreeRTOS,
|
||||
* and uses a different license to FreeRTOS. FreeRTOS+UDP uses a dual license
|
||||
* model, information on which is provided below:
|
||||
*
|
||||
* - Open source licensing -
|
||||
* FreeRTOS+UDP is a free download and may be used, modified and distributed
|
||||
* without charge provided the user adheres to version two of the GNU General
|
||||
* Public license (GPL) and does not remove the copyright notice or this text.
|
||||
* The GPL V2 text is available on the gnu.org web site, and on the following
|
||||
* URL: http://www.FreeRTOS.org/gpl-2.0.txt
|
||||
*
|
||||
* - Commercial licensing -
|
||||
* Businesses and individuals who wish to incorporate FreeRTOS+UDP into
|
||||
* proprietary software for redistribution in any form must first obtain a
|
||||
* (very) low cost commercial license - and in-so-doing support the maintenance,
|
||||
* support and further development of the FreeRTOS+UDP product. Commercial
|
||||
* licenses can be obtained from http://shop.freertos.org and do not require any
|
||||
* source files to be changed.
|
||||
*
|
||||
* FreeRTOS+UDP is distributed in the hope that it will be useful. You cannot
|
||||
* use FreeRTOS+UDP unless you agree that you use the software 'as is'.
|
||||
* FreeRTOS+UDP is provided WITHOUT ANY WARRANTY; without even the implied
|
||||
* warranties of NON-INFRINGEMENT, MERCHANTABILITY or FITNESS FOR A PARTICULAR
|
||||
* PURPOSE. Real Time Engineers Ltd. disclaims all conditions and terms, be they
|
||||
* implied, expressed, or statutory.
|
||||
*
|
||||
* 1 tab == 4 spaces!
|
||||
*
|
||||
* http://www.FreeRTOS.org
|
||||
* http://www.FreeRTOS.org/udp
|
||||
*
|
||||
*/
|
||||
|
||||
/* Standard includes. */
|
||||
#include <stdint.h>
|
||||
|
||||
/* FreeRTOS includes. */
|
||||
#include "FreeRTOS.h"
|
||||
#include "task.h"
|
||||
#include "queue.h"
|
||||
#include "semphr.h"
|
||||
|
||||
/* Hardware abstraction. */
|
||||
#include "FreeRTOS_IO.h"
|
||||
|
||||
/* FreeRTOS+UDP includes. */
|
||||
#include "FreeRTOS_UDP_IP.h"
|
||||
#include "FreeRTOS_Sockets.h"
|
||||
#include "NetworkBufferManagement.h"
|
||||
|
||||
/* Driver includes. */
|
||||
#include "lpc17xx_emac.h"
|
||||
#include "lpc17xx_pinsel.h"
|
||||
|
||||
/* Demo includes. */
|
||||
#include "NetworkInterface.h"
|
||||
|
||||
#if ipconfigETHERNET_DRIVER_FILTERS_FRAME_TYPES != 1
|
||||
#define ipCONSIDER_FRAME_FOR_PROCESSING( pucEthernetBuffer ) eProcessBuffer
|
||||
#else
|
||||
#define ipCONSIDER_FRAME_FOR_PROCESSING( pucEthernetBuffer ) eConsiderFrameForProcessing( ( pucEthernetBuffer ) )
|
||||
#endif
|
||||
|
||||
/* When a packet is ready to be sent, if it cannot be sent immediately then the
|
||||
task performing the transmit will block for niTX_BUFFER_FREE_WAIT
|
||||
milliseconds. It will do this a maximum of niMAX_TX_ATTEMPTS before giving
|
||||
up. */
|
||||
#define niTX_BUFFER_FREE_WAIT ( ( portTickType ) 2UL / portTICK_RATE_MS )
|
||||
#define niMAX_TX_ATTEMPTS ( 5 )
|
||||
|
||||
/* The length of the queue used to send interrupt status words from the
|
||||
interrupt handler to the deferred handler task. */
|
||||
#define niINTERRUPT_QUEUE_LENGTH ( 10 )
|
||||
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
/*
|
||||
* A deferred interrupt handler task that processes
|
||||
*/
|
||||
static void prvEMACHandlerTask( void *pvParameters );
|
||||
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
/* The queue used to communicate Ethernet events with the IP task. */
|
||||
extern xQueueHandle xNetworkEventQueue;
|
||||
|
||||
/* The semaphore used to wake the deferred interrupt handler task when an Rx
|
||||
interrupt is received. */
|
||||
static xSemaphoreHandle xEMACRxEventSemaphore = NULL;
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
portBASE_TYPE xNetworkInterfaceInitialise( void )
|
||||
{
|
||||
EMAC_CFG_Type Emac_Config;
|
||||
PINSEL_CFG_Type xPinConfig;
|
||||
portBASE_TYPE xStatus, xReturn;
|
||||
extern uint8_t ucMACAddress[ 6 ];
|
||||
|
||||
/* Enable Ethernet Pins */
|
||||
boardCONFIGURE_ENET_PINS( xPinConfig );
|
||||
|
||||
Emac_Config.Mode = EMAC_MODE_AUTO;
|
||||
Emac_Config.pbEMAC_Addr = ucMACAddress;
|
||||
xStatus = EMAC_Init( &Emac_Config );
|
||||
|
||||
LPC_EMAC->IntEnable &= ~( EMAC_INT_TX_DONE );
|
||||
|
||||
if( xStatus != ERROR )
|
||||
{
|
||||
vSemaphoreCreateBinary( xEMACRxEventSemaphore );
|
||||
configASSERT( xEMACRxEventSemaphore );
|
||||
|
||||
/* The handler task is created at the highest possible priority to
|
||||
ensure the interrupt handler can return directly to it. */
|
||||
xTaskCreate( prvEMACHandlerTask, ( const signed char * const ) "EMAC", configMINIMAL_STACK_SIZE, NULL, configMAX_PRIORITIES - 1, NULL );
|
||||
|
||||
/* Enable the interrupt and set its priority to the minimum
|
||||
interrupt priority. */
|
||||
NVIC_SetPriority( ENET_IRQn, configMAC_INTERRUPT_PRIORITY );
|
||||
NVIC_EnableIRQ( ENET_IRQn );
|
||||
|
||||
xReturn = pdPASS;
|
||||
}
|
||||
else
|
||||
{
|
||||
xReturn = pdFAIL;
|
||||
}
|
||||
|
||||
configASSERT( xStatus != ERROR );
|
||||
|
||||
return xReturn;
|
||||
}
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
portBASE_TYPE xNetworkInterfaceOutput( xNetworkBufferDescriptor_t * const pxNetworkBuffer )
|
||||
{
|
||||
portBASE_TYPE xReturn = pdFAIL;
|
||||
int32_t x;
|
||||
extern void EMAC_StartTransmitNextBuffer( uint32_t ulLength );
|
||||
extern void EMAC_SetNextPacketToSend( uint8_t * pucBuffer );
|
||||
|
||||
|
||||
/* Attempt to obtain access to a Tx buffer. */
|
||||
for( x = 0; x < niMAX_TX_ATTEMPTS; x++ )
|
||||
{
|
||||
if( EMAC_CheckTransmitIndex() == TRUE )
|
||||
{
|
||||
/* Will the data fit in the Tx buffer? */
|
||||
if( pxNetworkBuffer->xDataLength < EMAC_ETH_MAX_FLEN ) /*_RB_ The size needs to come from FreeRTOSIPConfig.h. */
|
||||
{
|
||||
/* Assign the buffer to the Tx descriptor that is now known to
|
||||
be free. */
|
||||
EMAC_SetNextPacketToSend( pxNetworkBuffer->pucBuffer );
|
||||
|
||||
/* The EMAC now owns the buffer. */
|
||||
pxNetworkBuffer->pucBuffer = NULL;
|
||||
|
||||
/* Initiate the Tx. */
|
||||
EMAC_StartTransmitNextBuffer( pxNetworkBuffer->xDataLength );
|
||||
iptraceNETWORK_INTERFACE_TRANSMIT();
|
||||
|
||||
/* The Tx has been initiated. */
|
||||
xReturn = pdPASS;
|
||||
}
|
||||
break;
|
||||
}
|
||||
else
|
||||
{
|
||||
vTaskDelay( niTX_BUFFER_FREE_WAIT );
|
||||
}
|
||||
}
|
||||
|
||||
/* Finished with the network buffer. */
|
||||
vNetworkBufferRelease( pxNetworkBuffer );
|
||||
|
||||
return xReturn;
|
||||
}
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
void ENET_IRQHandler( void )
|
||||
{
|
||||
uint32_t ulInterruptCause;
|
||||
|
||||
while( ( ulInterruptCause = LPC_EMAC->IntStatus ) != 0 )
|
||||
{
|
||||
/* Clear the interrupt. */
|
||||
LPC_EMAC->IntClear = ulInterruptCause;
|
||||
|
||||
/* Clear fatal error conditions. NOTE: The driver does not clear all
|
||||
errors, only those actually experienced. For future reference, range
|
||||
errors are not actually errors so can be ignored. */
|
||||
if( ( ulInterruptCause & EMAC_INT_TX_UNDERRUN ) != 0U )
|
||||
{
|
||||
LPC_EMAC->Command |= EMAC_CR_TX_RES;
|
||||
}
|
||||
|
||||
/* Unblock the deferred interrupt handler task if the event was an
|
||||
Rx. */
|
||||
if( ( ulInterruptCause & EMAC_INT_RX_DONE ) != 0UL )
|
||||
{
|
||||
xSemaphoreGiveFromISR( xEMACRxEventSemaphore, NULL );
|
||||
}
|
||||
}
|
||||
|
||||
/* Shortcut calling portEND_SWITCHING_ISR(). */
|
||||
vPortYieldFromISR();
|
||||
}
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
static void prvEMACHandlerTask( void *pvParameters )
|
||||
{
|
||||
size_t xDataLength;
|
||||
const uint16_t usCRCLength = 4;
|
||||
xNetworkBufferDescriptor_t *pxNetworkBuffer;
|
||||
xIPStackEvent_t xRxEvent = { eEthernetRxEvent, NULL };
|
||||
|
||||
/* This is not included in the header file for some reason. */
|
||||
extern uint8_t *EMAC_NextPacketToRead( void );
|
||||
|
||||
( void ) pvParameters;
|
||||
configASSERT( xEMACRxEventSemaphore );
|
||||
|
||||
for( ;; )
|
||||
{
|
||||
/* Wait for the EMAC interrupt to indicate that another packet has been
|
||||
received. The while() loop is only needed if INCLUDE_vTaskSuspend is
|
||||
set to 0 in FreeRTOSConfig.h. */
|
||||
while( xSemaphoreTake( xEMACRxEventSemaphore, portMAX_DELAY ) == pdFALSE );
|
||||
|
||||
/* At least one packet has been received. */
|
||||
while( EMAC_CheckReceiveIndex() != FALSE )
|
||||
{
|
||||
/* Obtain the length, minus the CRC. The CRC is four bytes
|
||||
but the length is already minus 1. */
|
||||
xDataLength = ( size_t ) EMAC_GetReceiveDataSize() - ( usCRCLength - 1U );
|
||||
|
||||
if( xDataLength > 0U )
|
||||
{
|
||||
/* Obtain a network buffer to pass this data into the
|
||||
stack. No storage is required as the network buffer
|
||||
will point directly to the buffer that already holds
|
||||
the received data. */
|
||||
pxNetworkBuffer = pxNetworkBufferGet( 0, ( portTickType ) 0 );
|
||||
|
||||
if( pxNetworkBuffer != NULL )
|
||||
{
|
||||
pxNetworkBuffer->pucBuffer = EMAC_NextPacketToRead();
|
||||
pxNetworkBuffer->xDataLength = xDataLength;
|
||||
xRxEvent.pvData = ( void * ) pxNetworkBuffer;
|
||||
|
||||
/* Data was received and stored. Send a message to the IP
|
||||
task to let it know. */
|
||||
if( xQueueSendToBack( xNetworkEventQueue, &xRxEvent, ( portTickType ) 0 ) == pdFALSE )
|
||||
{
|
||||
vNetworkBufferRelease( pxNetworkBuffer );
|
||||
iptraceETHERNET_RX_EVENT_LOST();
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
iptraceETHERNET_RX_EVENT_LOST();
|
||||
}
|
||||
|
||||
iptraceNETWORK_INTERFACE_RECEIVE();
|
||||
}
|
||||
|
||||
/* Release the frame. */
|
||||
EMAC_UpdateRxConsumeIndex();
|
||||
}
|
||||
}
|
||||
}
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
Loading…
Add table
Add a link
Reference in a new issue