Krzysztof Wesołowski wrote > On Wed, Jul 10, 2013 at 1:58 PM, Peter LM <
> listmlm78@ > > wrote: > >> I read something about NOCOPY during netconn-write(), and in the contrib >> example the flag NOCOPY was used therefore I did the same. But It is >> correctl running with the flag NETCON_COPY instead of NETCONN_NOCOPY !! >> Obviously I would prefer to use NOCOPY since I only send "read-only data" >> with the view to improve execution time and memory usage... > > > What you mean by read only data? It must be at least: > - directly adressible (flash or RAM in MCU), > - accesible by drivers DMA (for example Core Coupled RAM on STM32F4 cannot > be used). > > Regards, > Krzysztof Wesołowski > > _______________________________________________ > lwip-users mailing list > lwip-users@ > https://lists.nongnu.org/mailman/listinfo/lwip-users I meant read only data (const variable placed in .rodata section) thus directly adressible. I'm using only 128 KB RAM. I have not used DMA yet, just memcpy ... Regards, Peter -- View this message in context: http://lwip.100.n7.nabble.com/TCP-sending-without-headers-tp21719p21730.html Sent from the lwip-users mailing list archive at Nabble.com. _______________________________________________ lwip-users mailing list [email protected] https://lists.nongnu.org/mailman/listinfo/lwip-users
