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Observer jimmystone
Observer
228 次查看
注册日期: ‎05-17-2010

xc7z7020 JTAG找不到device

当我准备连接JTAG和FPGA板的时候,出现以下错误。现在我的ZYNQ可以靠SD卡配置成功(configure done的LED会亮起),但是无法通过JTAG下载FPGA bitstream

open_hw_target
INFO: [Labtoolstcl 44-466] Opening hw_target localhost:3121/xilinx_tcf/Digilent/2102498xxxxx
ERROR: [Labtools 27-2269] No devices detected on target localhost:3121/xilinx_tcf/Digilent/2102498xxxxx.
Check cable connectivity and that the target board is powered up then
use the disconnect_hw_server and connect_hw_server to re-register this hardware target.
ERROR: [Common 17-39] 'open_hw_target' failed due to earlier errors.

在Ubuntu18.04和Win7两个系统下试过,都是这个状况

BTW, Ubuntu下已经装过Linux cable驱动

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Xilinx Employee
Xilinx Employee
164 次查看
注册日期: ‎08-26-2010

回复: xc7z7020 JTAG找不到device

Hi @jimmystone,

 

看起来cable driver应该是安装好了,cable的型号是什么呢?cable速度能降到最低能找到器件吗?

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Xilinx Employee
Xilinx Employee
147 次查看
注册日期: ‎06-02-2017

回复: xc7z7020 JTAG找不到device

Hi @jimmystone

你使用的是什么开发板?首先确定该板上JTAG电路没有问题。相同的板子有没有下载成功过?

如果JTAG电路确定没有问题,JTAG连接不上器件的原因比较多,例如之前较早的Vivado版本会出现类似的情况。需要重启vivado工具,以及重新power cycle FPGA电路板。

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Observer jimmystone
Observer
125 次查看
注册日期: ‎05-17-2010

回复: xc7z7020 JTAG找不到device

Hi @zhiq

我用的开发板是淘宝米联客的Miz701N,JTAG的电路设计应该没有问题

我在Ubuntu下用的是Vivado 2018.2 WebPack,和2015.4 Lab版,Win7下用的是2015.4 Lab版

都出现不能找到device的问题

 

 

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Observer jimmystone
Observer
124 次查看
注册日期: ‎05-17-2010

回复: xc7z7020 JTAG找不到device

Hi, @simon

Cable降到最低速度,也没有找到device

还有什么可以尝试的吗?

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Xilinx Employee
Xilinx Employee
58 次查看
注册日期: ‎08-26-2010

回复: xc7z7020 JTAG找不到device

Hi @jimmystone,

现在能支持的最低速率是多少?可以再试下ISE的impact看看是否还是同样的问题?如果有问题,把log文件也贴上来看看。另外这个cable试过连其他板子吗?

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Xilinx Employee
Xilinx Employee
56 次查看
注册日期: ‎06-02-2017

回复: xc7z7020 JTAG找不到device

Hi @jimmystone

虽然不是Xilinx官方的开发板,但是电路应该没有问题。这样看起来更可能是Cable驱动的问题了。

建议首先仔细阅读这款开发板的说明文档,注意是否需要在板上进行什么配置;另外就是Cable驱动的安装是否按照要求进行;再就是可以尝试用现在的电脑和Cable尝试连接其他的FPGA板,可以推断出是cable的问题还是FPGA板卡的问题。

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