Too Slow TFTP transfer speed

mrniknejad · ‎2013-05-16

Posted on May 17, 2013 at 07:13

Hi All

I am using TFTP example in my project using STM32F2x7_ETH_LwIP_V1.1.0 library but my problem is about the transfer speed !! my results explain that a 255KB file transfer from Pc to ARM take about 3 minutes to complete and its awful for me.

so is there any way to increase the transfer speed ?

thanks

amin23 · ‎2013-05-17

Posted on May 17, 2013 at 17:25

Hi,

I think the application takes a large amount of time to write the file into the SD card and not in the transfer. so the majority of time is spent in the writing process

mrniknejad · ‎2013-05-18

Posted on May 18, 2013 at 21:26

No i don't think so, because the writing speed in SD card is so much faster than that !

to ensure about that i comment the write function in SD and the result is the same and make no difference in transfer speed !!!!

Tesla DeLorean · ‎2013-05-18

Posted on May 18, 2013 at 22:22

The throughput suggested seems very low.

Depending on the block size, a Class 10 SDHC card can be 6-7 MBps writing, 18-19 MBps reading. The SDIO implementation on the F2/F4 isn't too bad, the SPI of the F107 is a bit sluggish, but would still expect 200-300 KBps.

I guess I'd be looking at the Ethernet side of things, checking buffers, timeouts and such. Might want to snoop the traffic, see what's going on.

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