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Blackfin527 USB Host Problem

Question asked by turtur on Oct 27, 2010
Latest reply on Nov 30, 2010 by matchaze


Hi
I use my own Blackfin527 PCB to try USB as a HOST. I use the project <VDSP5.0>\Blackfin\Examples\ADSP-BF527 EZ-KIT Lite\Services\File System\VDK\shell_browser to run. Before I run this project, I have insert a 4GB USB Disk into the USB A socket, and I connnect the PCB to PC using UART1 of Blackfin526.
When I run this project, the information below is shown on UARTassist, and I can see the LED of USB disk blink.
c:  NO NAME FAT32   3827 MB Mounted
c:/% ls
d          0  Aug 13 2010 16:06:16 DSNT950
f    4316242  Aug 19 2010 16:57:27 zhukong_20100819.PCB
f      12751  Jul 23 2010 16:45:14 PORTF_GPIO.c
f   17588224  Aug 26 2010 14:22:12 LOCAL.DDB
f   27168771  Aug 28 2010 13:53:23 zhukong_20100819.dwg
f    2622880  Aug 28 2010 13:59:24 2.DWG
f     153966  Aug 28 2010 14:56:20 ZHUBAB Model (1).pdf
f   37023744  Sep 10 2010 16:43:01 zhukongban.ddb
d          0  Sep 02 2010 19:56:09 PHOTO
f    1893888  Jul 06 2009 09:01:17 UartAssist.exe
f   11746342  Sep 10 2010 13:09:22 daemon-x86pro.exe
d          0  Oct 15 2010 16:47:18 USB
f    8133270  Apr 14 2010 14:57:26 ADSP-BF522_BF523_BF524_BF525_BF526_BF527.pdf
f    7268821  Oct 15 2010 16:44:16 BF52xPeriphHWR03.pdf
f    7257788  Sep 10 2010 10:29:00 BF52xProcHWR031.pdf
f     902144  Sep 02 2010 15:10:09 LENGTH.DOC
c:/%
Then I type c:/% rm 2.dwg command but there is no response from Blackfin527 of this PCB and the LED of USB disk doesn't blink.
c:/%
c:/%
c:/%
c:/% rm 2.dwg
and then there is no response from BF527. What is the problem?
The circuit of USB on my PCB has a little difference from BF527 EZ-KIT Lite. My circuit is shown below

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