[ ]
 Real time embedded FreeRTOS RSS feed 
Real time embedded FreeRTOS mailing list 
Homepage FreeRTOS Labs FreeRTOS+TCP FreeRTOS+FAT Contact / Enquiries

FreeRTOS+TCP is still in the lab
FreeRTOS+TCP is already used in commercial products and we encourage you to try it yourself. Be aware however that we are still refining its design, and the source code and documentation do not yet meet Real Time Engineers Ltd's strict quality standards.
Please use the forum for support, feedback and ideas, or contact us directly if you have a specific business interest.

[Ethernet Driver Porting API]

eFrameProcessingResult_t eConsiderFrameForProcessing( uint8_t *pucPayloadBuffer );

Examines a received Ethernet frame to determine if, taking into account the current state of the TCP/IP stack, the Ethernet frame should be processed or dropped.

If ipconfigETHERNET_DRIVER_FILTERS_FRAME_TYPES is set to 1 in FreeRTOSIPConfig.h then eConsiderFrameForProcessing() should be called by the network interface port layer to determine whether received Ethernet frames should be sent to the IP stack for processing. If ipconfigETHERNET_DRIVER_FILTERS_FRAME_TYPES is set to 0 in FreeRTOSIPConfig.h then the TCP/IP stack will itself call eConsiderFrameForProcessing(), but only after it has already received the Ethernet frame from the network interface port layer.

It might not be necessary to call eConsiderFrameForProcessing() if the embedded Ethernet peripheral hardware is itself configured to filter Ethernet frames.


pucPayloadBuffer   A pointer to the start of the Ethernet frame being inspected.


eProcessBuffer is returned if the Ethernet frame needs processing. eReleaseBuffer is returned if the Ethernet frame can be dropped (in which case both the network buffer descriptor that references the Ethernet frame, and the Ethernet frame itself, must both be returned to the TCP/IP stack).

Example usage:

Examples are provided on the Porting FreeRTOS to a Different Microcontroller page.

[ Back to the top ]    [ About FreeRTOS ]    [ FreeRTOS Labs Sitemap ]    [ Main FreeRTOS Sitemap ]    [ ]

Copyright (C) 2004-2010 Richard Barry. Copyright (C) 2010-2016 Real Time Engineers Ltd.
Any and all data, files, source code, html content and documentation included in the FreeRTOSTM distribution or available on this site are the exclusive property of Real Time Engineers Ltd.. See the files license.txt (included in the distribution) and this copyright notice for more information. FreeRTOSTM and FreeRTOS.orgTM are trade marks of Real Time Engineers Ltd.