测JTAG的TRST一直为低

1万 · 2015-12-13 09:45

自己做了一块dsp28016的最小系统，测得电压、时钟信号都是正常的，用的仿真器是spectrum digital XDS510LC usb

每次连接报错是：
Error connecting to the target:
Error 0x80000200/-1135
Fatal Error during: OCS,
Unrecoverable emulation errorI/O Port = 510
Board Name: F2808 XDS510USB Emulator
Cpu Name: cpu_0
Abort:  Close Code Composer Studio.
Retry:  Try to connect to the target again.
Cancel:  Remain disconnected from the target
Diagnostic: Run diagnostic utility.

接上仿真器后，测JTAG的TRST一直为低，TCK没有脉，TMS为3.28V。