访问寄存器出现错误 求大神帮忙

用的dm368的evm板还是自己做的板子？

请看下面的回复：

Unfortunately I don't have a TDS560USB to test the exact configuration of your customer, but this error may be caused by a series of factors (the CPU is reset, powered down, the JTAG communications are faulty, a boot configuration is preventing JTAG access), therefore I suggest you check a few details:

The dbgjtag utility helps investigate the low-level status of the connection (perform several data transfer and integrity tests at the lowest level). Check the wiki page below:

http://processors.wiki.ti.com/index.php/Dbgjtag

Also, one detail that is common in ARM9 processors (DM368 has one) is the need to use Adaptive Clocking.

http://processors.wiki.ti.com/index.php/Adaptive_Clocking

I am not sure if the TDS560USB emulator has this capability, but you can try to see what options are available using the CCSetup utility and right-clicking on the Emulator node of the System Configuration tree (check the attached screen).

The page below also helps configuring and has some tips to further investigate this, despite several of the software tips are applicable only to CCSv4 and 5.

http://processors.wiki.ti.com/index.php/Debugging_JTAG_Connectivity_Problems

Hope this helps