使用DSP6670的时候,芯片的电源和时钟都正常,但是在进行连接的时候出现了下面的错误提示,开始怀疑是芯片有问题,但是更换了芯片之后问题还是存在,求大神指教。
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请参考如下答复:
The error message indicates that all the attempts of the emulator to communicate with the device are not acknowledged. Maybe the processing core is halted or hung by an external effect.
In this case you can get some additional insights if you run the low-level debug utility dbgjtag (or use the Test Connection button from CCSv5) - more details at the page below:
http://processors.wiki.ti.com/index.php/Debugging_JTAG_Connectivity_Problems
In this case, I would start with the BH560m, do the low-level dbgjtag testing and look for any errors that may suggest problems in their hardware (stuck-at-ones, stuck-at-zeros, device reset, etc.)
Another useful setting that is hardware dependent is the JTAG clock settings (also shown at the page I sent before) usually the board should work with the legacy value of 10.368MHz, but depending on the routing or buffering of the JTAG signals you may need to use a lower value for that.