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问题： 自制xilinx下载线遇到问题。cannot find cable，check cable setup
描述:
http://comm.chinaaet.com/adi/blogdetail/34431.html
板子焊接完了，EEPROM固件程序也已成功下载，电脑能够识别下载线，设备管理器中显示xilinx USB cable。如下图
但在使用IMPCT更新CPLD固件的时候遇到了问题，如下图
IMPCT的console中错误信息如下图
有人遇到过这样的问题吗？请留言帮助，不胜感激！
以下附console的全部日志内容
Welcome to iMPACT
iMPACT Version: 13.4
// *** BATCH CMD : setMode -bs
// *** BATCH CMD : setMode -bs
// *** BATCH CMD : setMode -bs
// *** BATCH CMD : setMode -bs
GUI --- Auto connect to cable...
// *** BATCH CMD : setCable -port auto
AutoDetecting cable. Please wait.
PROGRESS_START - Starting Operation.
Connecting to cable (Usb Port - USB21).
Checking cable driver.
Driver file xusbdfwu.sys found.
Driver version: src=1027, dest=1027.
Driver windrvr6.sys version = 10.2.1.0. WinDriver v10.21 Jungo (c) 1997 - 2010 Build Date: Aug 31 2010 x86_64 64bit SYS 14:14:44, version = 1021.
Cable PID = 0008.
Max current requested during enumeration is 74 mA.
Type = 0x0004.
Cable Type = 3, Revision = 0.
Setting cable speed to 6 MHz.
write cmdbuffer failed 20000015.
Error reading reference voltage level.
Cable connection failed.
Connecting to cable (Parallel Port - LPT1).
Checking cable driver.
Driver windrvr6.sys version = 10.2.1.0. WinDriver v10.21 Jungo (c) 1997 - 2010 Build Date: Aug 31 2010 x86_64 64bit SYS 14:14:44, version = 1021.
Cable connection failed.
Connecting to cable (Parallel Port - LPT2).
Checking cable driver.
Driver windrvr6.sys version = 10.2.1.0. WinDriver v10.21 Jungo (c) 1997 - 2010 Build Date: Aug 31 2010 x86_64 64bit SYS 14:14:44, version = 1021.
Cable connection failed.
Connecting to cable (Parallel Port - LPT3).
Checking cable driver.
Driver windrvr6.sys version = 10.2.1.0. WinDriver v10.21 Jungo (c) 1997 - 2010 Build Date: Aug 31 2010 x86_64 64bit SYS 14:14:44, version = 1021.
Cable connection failed.
Connecting to cable (Parallel Port - LPT4).
Checking cable driver.
Driver windrvr6.sys version = 10.2.1.0. WinDriver v10.21 Jungo (c) 1997 - 2010 Build Date: Aug 31 2010 x86_64 64bit SYS 14:14:44, version = 1021.
Cable connection failed.
PROGRESS_END - End Operation.
Elapsed time = 12 sec.
Cable autodetection failed.
WARNING:iMPACT:923 - Can not find cable, check cable setup !
描述:
usbFPGA下载线DIY
按照这个博客中的资料，我自制了XILINX的下载线。http://comm.chinaaet.com/adi/blogdetail/34431.html
板子焊接完了，EEPROM固件程序也已成功下载，电脑能够识别下载线，设备管理器中显示xilinx USB cable。如下图
但在使用IMPCT更新CPLD固件的时候遇到了问题，如下图
IMPCT的console中错误信息如下图
有人遇到过这样的问题吗？请留言帮助，不胜感激！
以下附console的全部日志内容
Welcome to iMPACT
iMPACT Version: 13.4
// *** BATCH CMD : setMode -bs
// *** BATCH CMD : setMode -bs
// *** BATCH CMD : setMode -bs
// *** BATCH CMD : setMode -bs
GUI --- Auto connect to cable...
// *** BATCH CMD : setCable -port auto
AutoDetecting cable. Please wait.
PROGRESS_START - Starting Operation.
Connecting to cable (Usb Port - USB21).
Checking cable driver.
Driver file xusbdfwu.sys found.
Driver version: src=1027, dest=1027.
Driver windrvr6.sys version = 10.2.1.0. WinDriver v10.21 Jungo (c) 1997 - 2010 Build Date: Aug 31 2010 x86_64 64bit SYS 14:14:44, version = 1021.
Cable PID = 0008.
Max current requested during enumeration is 74 mA.
Type = 0x0004.
Cable Type = 3, Revision = 0.
Setting cable speed to 6 MHz.
write cmdbuffer failed 20000015.
Error reading reference voltage level.
Cable connection failed.
Connecting to cable (Parallel Port - LPT1).
Checking cable driver.
Driver windrvr6.sys version = 10.2.1.0. WinDriver v10.21 Jungo (c) 1997 - 2010 Build Date: Aug 31 2010 x86_64 64bit SYS 14:14:44, version = 1021.
Cable connection failed.
Connecting to cable (Parallel Port - LPT2).
Checking cable driver.
Driver windrvr6.sys version = 10.2.1.0. WinDriver v10.21 Jungo (c) 1997 - 2010 Build Date: Aug 31 2010 x86_64 64bit SYS 14:14:44, version = 1021.
Cable connection failed.
Connecting to cable (Parallel Port - LPT3).
Checking cable driver.
Driver windrvr6.sys version = 10.2.1.0. WinDriver v10.21 Jungo (c) 1997 - 2010 Build Date: Aug 31 2010 x86_64 64bit SYS 14:14:44, version = 1021.
Cable connection failed.
Connecting to cable (Parallel Port - LPT4).
Checking cable driver.
Driver windrvr6.sys version = 10.2.1.0. WinDriver v10.21 Jungo (c) 1997 - 2010 Build Date: Aug 31 2010 x86_64 64bit SYS 14:14:44, version = 1021.
Cable connection failed.
PROGRESS_END - End Operation.
Elapsed time = 12 sec.
Cable autodetection failed.
WARNING:iMPACT:923 - Can not find cable, check cable setup !