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用USB JTAG时,连接不上,提示
the OCD JTAG adapter was detected,but the target device did not return a valid JTAG ID,please check the point below and click retry.Read the online help for more information.
Check that the JTAG ICE is properly connected to the target device.
Check that the JTAGEN fuse of the target device is programmed.
in case the existing application code programmed into the device disabled the JTAG interface,select the check box below to activate external reset upon connect.
in case the target device is part of a daisy chain,click the botton below to set the proper setting.
Activate target device external reset upon connect.
请问下怎么回事啊? |
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