我找到了关于debugportstop的描述：Power down and disconnect from target debug port.
Executed as last step during target disconnect unless another debugger connection to this port is active. The parent debugport is default debug port for this sequence.
This sequence must not contain access port register and target memory accesses.
根据这个描述，我感觉是我当时正在仿真，然后软件死机以后我强制关掉软件导致的，但是我不知道去哪里可以解决它，我尝试过重装keil和DSP的库，也没有解决这个问题
