-/*
-FreeRTOS+TCP V2.0.11
-Copyright (C) 2017 Amazon.com, Inc. or its affiliates. All Rights Reserved.
-
-Permission is hereby granted, free of charge, to any person obtaining a copy of
-this software and associated documentation files (the "Software"), to deal in
-the Software without restriction, including without limitation the rights to
-use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
-the Software, and to permit persons to whom the Software is furnished to do so,
-subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
-FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
-COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
-IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
- http://aws.amazon.com/freertos
- http://www.FreeRTOS.org
-*/
-
-/* 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+TCP 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 ( pdMS_TO_TICKS( 2UL ) )
-#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 QueueHandle_t xNetworkEventQueue;
-
-/* The semaphore used to wake the deferred interrupt handler task when an Rx
-interrupt is received. */
-static SemaphoreHandle_t xEMACRxEventSemaphore = NULL;
-/*-----------------------------------------------------------*/
-
-BaseType_t xNetworkInterfaceInitialise( void )
-{
-EMAC_CFG_Type Emac_Config;
-PINSEL_CFG_Type xPinConfig;
-BaseType_t 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, "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;
-}
-/*-----------------------------------------------------------*/
-
-BaseType_t xNetworkInterfaceOutput( NetworkBufferDescriptor_t * const pxNetworkBuffer )
-{
-BaseType_t 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. */
- vReleaseNetworkBufferAndDescriptor( 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 );
- }
- }
-
- /* ulInterruptCause is used for convenience here. A context switch is
- wanted, but coding portEND_SWITCHING_ISR( 1 ) would likely result in a
- compiler warning. */
- portEND_SWITCHING_ISR( ulInterruptCause );
-}
-/*-----------------------------------------------------------*/
-
-static void prvEMACHandlerTask( void *pvParameters )
-{
-size_t xDataLength;
-const uint16_t usCRCLength = 4;
-NetworkBufferDescriptor_t *pxNetworkBuffer;
-IPStackEvent_t xRxEvent = { eNetworkRxEvent, 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 = pxGetNetworkBufferWithDescriptor( 0, ( TickType_t ) 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( xSendEventStructToIPTask( &xRxEvent, ( TickType_t ) 0 ) == pdFAIL )
- {
- vReleaseNetworkBufferAndDescriptor( pxNetworkBuffer );
- iptraceETHERNET_RX_EVENT_LOST();
- }
- }
- else
- {
- iptraceETHERNET_RX_EVENT_LOST();
- }
-
- iptraceNETWORK_INTERFACE_RECEIVE();
- }
-
- /* Release the frame. */
- EMAC_UpdateRxConsumeIndex();
- }
- }
-}
-/*-----------------------------------------------------------*/
-
+/*\r
+FreeRTOS+TCP V2.0.11\r
+Copyright (C) 2017 Amazon.com, Inc. or its affiliates. All Rights Reserved.\r
+\r
+Permission is hereby granted, free of charge, to any person obtaining a copy of\r
+this software and associated documentation files (the "Software"), to deal in\r
+the Software without restriction, including without limitation the rights to\r
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of\r
+the Software, and to permit persons to whom the Software is furnished to do so,\r
+subject to the following conditions:\r
+\r
+The above copyright notice and this permission notice shall be included in all\r
+copies or substantial portions of the Software.\r
+\r
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\r
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS\r
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR\r
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER\r
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN\r
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.\r
+\r
+ http://aws.amazon.com/freertos\r
+ http://www.FreeRTOS.org\r
+*/\r
+\r
+/* Standard includes. */\r
+#include <stdint.h>\r
+\r
+/* FreeRTOS includes. */\r
+#include "FreeRTOS.h"\r
+#include "task.h"\r
+#include "queue.h"\r
+#include "semphr.h"\r
+\r
+/* Hardware abstraction. */\r
+#include "FreeRTOS_IO.h"\r
+\r
+/* FreeRTOS+TCP includes. */\r
+#include "FreeRTOS_UDP_IP.h"\r
+#include "FreeRTOS_Sockets.h"\r
+#include "NetworkBufferManagement.h"\r
+\r
+/* Driver includes. */\r
+#include "lpc17xx_emac.h"\r
+#include "lpc17xx_pinsel.h"\r
+\r
+/* Demo includes. */\r
+#include "NetworkInterface.h"\r
+\r
+#if ipconfigETHERNET_DRIVER_FILTERS_FRAME_TYPES != 1\r
+ #define ipCONSIDER_FRAME_FOR_PROCESSING( pucEthernetBuffer ) eProcessBuffer\r
+#else\r
+ #define ipCONSIDER_FRAME_FOR_PROCESSING( pucEthernetBuffer ) eConsiderFrameForProcessing( ( pucEthernetBuffer ) )\r
+#endif\r
+\r
+/* When a packet is ready to be sent, if it cannot be sent immediately then the\r
+task performing the transmit will block for niTX_BUFFER_FREE_WAIT\r
+milliseconds. It will do this a maximum of niMAX_TX_ATTEMPTS before giving\r
+up. */\r
+#define niTX_BUFFER_FREE_WAIT ( pdMS_TO_TICKS( 2UL ) )\r
+#define niMAX_TX_ATTEMPTS ( 5 )\r
+\r
+/* The length of the queue used to send interrupt status words from the\r
+interrupt handler to the deferred handler task. */\r
+#define niINTERRUPT_QUEUE_LENGTH ( 10 )\r
+\r
+/*-----------------------------------------------------------*/\r
+\r
+/*\r
+ * A deferred interrupt handler task that processes\r
+ */\r
+static void prvEMACHandlerTask( void *pvParameters );\r
+\r
+/*-----------------------------------------------------------*/\r
+\r
+/* The queue used to communicate Ethernet events with the IP task. */\r
+extern QueueHandle_t xNetworkEventQueue;\r
+\r
+/* The semaphore used to wake the deferred interrupt handler task when an Rx\r
+interrupt is received. */\r
+static SemaphoreHandle_t xEMACRxEventSemaphore = NULL;\r
+/*-----------------------------------------------------------*/\r
+\r
+BaseType_t xNetworkInterfaceInitialise( void )\r
+{\r
+EMAC_CFG_Type Emac_Config;\r
+PINSEL_CFG_Type xPinConfig;\r
+BaseType_t xStatus, xReturn;\r
+extern uint8_t ucMACAddress[ 6 ];\r
+\r
+ /* Enable Ethernet Pins */\r
+ boardCONFIGURE_ENET_PINS( xPinConfig );\r
+\r
+ Emac_Config.Mode = EMAC_MODE_AUTO;\r
+ Emac_Config.pbEMAC_Addr = ucMACAddress;\r
+ xStatus = EMAC_Init( &Emac_Config );\r
+\r
+ LPC_EMAC->IntEnable &= ~( EMAC_INT_TX_DONE );\r
+\r
+ if( xStatus != ERROR )\r
+ {\r
+ vSemaphoreCreateBinary( xEMACRxEventSemaphore );\r
+ configASSERT( xEMACRxEventSemaphore );\r
+\r
+ /* The handler task is created at the highest possible priority to\r
+ ensure the interrupt handler can return directly to it. */\r
+ xTaskCreate( prvEMACHandlerTask, "EMAC", configMINIMAL_STACK_SIZE, NULL, configMAX_PRIORITIES - 1, NULL );\r
+\r
+ /* Enable the interrupt and set its priority to the minimum\r
+ interrupt priority. */\r
+ NVIC_SetPriority( ENET_IRQn, configMAC_INTERRUPT_PRIORITY );\r
+ NVIC_EnableIRQ( ENET_IRQn );\r
+\r
+ xReturn = pdPASS;\r
+ }\r
+ else\r
+ {\r
+ xReturn = pdFAIL;\r
+ }\r
+\r
+ configASSERT( xStatus != ERROR );\r
+\r
+ return xReturn;\r
+}\r
+/*-----------------------------------------------------------*/\r
+\r
+BaseType_t xNetworkInterfaceOutput( NetworkBufferDescriptor_t * const pxNetworkBuffer )\r
+{\r
+BaseType_t xReturn = pdFAIL;\r
+int32_t x;\r
+extern void EMAC_StartTransmitNextBuffer( uint32_t ulLength );\r
+extern void EMAC_SetNextPacketToSend( uint8_t * pucBuffer );\r
+\r
+\r
+ /* Attempt to obtain access to a Tx buffer. */\r
+ for( x = 0; x < niMAX_TX_ATTEMPTS; x++ )\r
+ {\r
+ if( EMAC_CheckTransmitIndex() == TRUE )\r
+ {\r
+ /* Will the data fit in the Tx buffer? */\r
+ if( pxNetworkBuffer->xDataLength < EMAC_ETH_MAX_FLEN ) /*_RB_ The size needs to come from FreeRTOSIPConfig.h. */\r
+ {\r
+ /* Assign the buffer to the Tx descriptor that is now known to\r
+ be free. */\r
+ EMAC_SetNextPacketToSend( pxNetworkBuffer->pucBuffer );\r
+\r
+ /* The EMAC now owns the buffer. */\r
+ pxNetworkBuffer->pucBuffer = NULL;\r
+\r
+ /* Initiate the Tx. */\r
+ EMAC_StartTransmitNextBuffer( pxNetworkBuffer->xDataLength );\r
+ iptraceNETWORK_INTERFACE_TRANSMIT();\r
+\r
+ /* The Tx has been initiated. */\r
+ xReturn = pdPASS;\r
+ }\r
+ break;\r
+ }\r
+ else\r
+ {\r
+ vTaskDelay( niTX_BUFFER_FREE_WAIT );\r
+ }\r
+ }\r
+\r
+ /* Finished with the network buffer. */\r
+ vReleaseNetworkBufferAndDescriptor( pxNetworkBuffer );\r
+\r
+ return xReturn;\r
+}\r
+/*-----------------------------------------------------------*/\r
+\r
+void ENET_IRQHandler( void )\r
+{\r
+uint32_t ulInterruptCause;\r
+\r
+ while( ( ulInterruptCause = LPC_EMAC->IntStatus ) != 0 )\r
+ {\r
+ /* Clear the interrupt. */\r
+ LPC_EMAC->IntClear = ulInterruptCause;\r
+\r
+ /* Clear fatal error conditions. NOTE: The driver does not clear all\r
+ errors, only those actually experienced. For future reference, range\r
+ errors are not actually errors so can be ignored. */\r
+ if( ( ulInterruptCause & EMAC_INT_TX_UNDERRUN ) != 0U )\r
+ {\r
+ LPC_EMAC->Command |= EMAC_CR_TX_RES;\r
+ }\r
+\r
+ /* Unblock the deferred interrupt handler task if the event was an\r
+ Rx. */\r
+ if( ( ulInterruptCause & EMAC_INT_RX_DONE ) != 0UL )\r
+ {\r
+ xSemaphoreGiveFromISR( xEMACRxEventSemaphore, NULL );\r
+ }\r
+ }\r
+\r
+ /* ulInterruptCause is used for convenience here. A context switch is\r
+ wanted, but coding portEND_SWITCHING_ISR( 1 ) would likely result in a\r
+ compiler warning. */\r
+ portEND_SWITCHING_ISR( ulInterruptCause );\r
+}\r
+/*-----------------------------------------------------------*/\r
+\r
+static void prvEMACHandlerTask( void *pvParameters )\r
+{\r
+size_t xDataLength;\r
+const uint16_t usCRCLength = 4;\r
+NetworkBufferDescriptor_t *pxNetworkBuffer;\r
+IPStackEvent_t xRxEvent = { eNetworkRxEvent, NULL };\r
+\r
+/* This is not included in the header file for some reason. */\r
+extern uint8_t *EMAC_NextPacketToRead( void );\r
+\r
+ ( void ) pvParameters;\r
+ configASSERT( xEMACRxEventSemaphore );\r
+\r
+ for( ;; )\r
+ {\r
+ /* Wait for the EMAC interrupt to indicate that another packet has been\r
+ received. The while() loop is only needed if INCLUDE_vTaskSuspend is\r
+ set to 0 in FreeRTOSConfig.h. */\r
+ while( xSemaphoreTake( xEMACRxEventSemaphore, portMAX_DELAY ) == pdFALSE );\r
+\r
+ /* At least one packet has been received. */\r
+ while( EMAC_CheckReceiveIndex() != FALSE )\r
+ {\r
+ /* Obtain the length, minus the CRC. The CRC is four bytes\r
+ but the length is already minus 1. */\r
+ xDataLength = ( size_t ) EMAC_GetReceiveDataSize() - ( usCRCLength - 1U );\r
+\r
+ if( xDataLength > 0U )\r
+ {\r
+ /* Obtain a network buffer to pass this data into the\r
+ stack. No storage is required as the network buffer\r
+ will point directly to the buffer that already holds\r
+ the received data. */\r
+ pxNetworkBuffer = pxGetNetworkBufferWithDescriptor( 0, ( TickType_t ) 0 );\r
+\r
+ if( pxNetworkBuffer != NULL )\r
+ {\r
+ pxNetworkBuffer->pucBuffer = EMAC_NextPacketToRead();\r
+ pxNetworkBuffer->xDataLength = xDataLength;\r
+ xRxEvent.pvData = ( void * ) pxNetworkBuffer;\r
+\r
+ /* Data was received and stored. Send a message to the IP\r
+ task to let it know. */\r
+ if( xSendEventStructToIPTask( &xRxEvent, ( TickType_t ) 0 ) == pdFAIL )\r
+ {\r
+ vReleaseNetworkBufferAndDescriptor( pxNetworkBuffer );\r
+ iptraceETHERNET_RX_EVENT_LOST();\r
+ }\r
+ }\r
+ else\r
+ {\r
+ iptraceETHERNET_RX_EVENT_LOST();\r
+ }\r
+\r
+ iptraceNETWORK_INTERFACE_RECEIVE();\r
+ }\r
+\r
+ /* Release the frame. */\r
+ EMAC_UpdateRxConsumeIndex();\r
+ }\r
+ }\r
+}\r
+/*-----------------------------------------------------------*/\r
+\r
projects / freertos / blobdiff