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Hi,
We want to high speed file transfer from sdcard to mobile phone with CYW54907.
But we need min 2Mbyte/sec transfer speed.
lf l use 802.11ac and make ftp server on lwip with wiced platform, can i reach min 2Mbyte/sec?
wlth high speed sdcard on CYW54907 sdio interface.
is it possible? If not is there any solution with any controller?
Thanks
Solved! Go to Solution.
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I tried video streaming from SD card via HTTP before. In that case, the maximum throughput was more than 10 Mbyte/sec.
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Hi :
we can divide the app into three steps:
1. TCP throughput , I just use 54907 board to do a iperf TCP test.
please see the result, it is on 159 channel with HT20 . It can get a result >2M Bytes easily in an open envrionment .
C:\Users\Administrator>iperf -s -w 1M -i1
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 1.00 MByte
------------------------------------------------------------
[264] local 10.0.0.2 port 5001 connected with 10.0.0.4 port 54462
[ ID] Interval Transfer Bandwidth
[264] 0.0- 1.0 sec 3.11 MBytes 26.1 Mbits/sec
[264] 1.0- 2.0 sec 2.95 MBytes 24.8 Mbits/sec
[264] 2.0- 3.0 sec 3.13 MBytes 26.3 Mbits/sec
[264] 3.0- 4.0 sec 2.94 MBytes 24.7 Mbits/sec
[264] 4.0- 5.0 sec 2.83 MBytes 23.7 Mbits/sec
[264] 5.0- 6.0 sec 2.88 MBytes 24.2 Mbits/sec
[264] 6.0- 7.0 sec 2.97 MBytes 24.9 Mbits/sec
[264] 7.0- 8.0 sec 3.05 MBytes 25.6 Mbits/sec
[264] 8.0- 9.0 sec 2.80 MBytes 23.5 Mbits/sec
[264] 9.0-10.0 sec 3.23 MBytes 27.1 Mbits/sec
[264] 10.0-11.0 sec 3.20 MBytes 26.9 Mbits/sec
[264] 11.0-12.0 sec 3.37 MBytes 28.3 Mbits/sec
[264] 12.0-13.0 sec 3.18 MBytes 26.7 Mbits/sec
[264] 13.0-14.0 sec 3.19 MBytes 26.8 Mbits/sec
2. SDIO interface speed, as you said we can set SDIO into 4-line hight speed mode, it can get a speed > 2M Bytes easily.
3. so the main tuning and focus are the process : data read from SDIO interface --> RAM ---> send to mac , RF side by using FTP protocol.
The application optimization will determine the transfer speed.
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I tried video streaming from SD card via HTTP before. In that case, the maximum throughput was more than 10 Mbyte/sec.
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thanks a lot, 54907 should have this capability with 11AC enabled.