自己设计的板子，用了28335。
运行ADC采样，和toggle程序都可以。但运行PWM程序时，不到一分钟出现报错。
C28xx: Error: (Error -150 @ 0x0) One of the FTDI driver functions used during configuration returned a invalid status or an error. (Emulation package 5.1.450.0)
C28xx: Error: (Error -154 @ 0x0) One of the FTDI driver functions used to write data returned bad status or an error. (Emulation package 5.1.450.0)
C28xx: Unable to determine target status after 20 attempts
C28xx: Failed to remove the debug state from the target before disconnecting. There may still be breakpoint op-codes embedded in program memory. It is recommended that you reset the emulator before you connect and reload your program before you continue debugging
测试JTAG口连接状态，如下：
[Start: Texas Instruments XDS100v3 USB Emulator]
Execute the command:
%ccs_base%/common/uscif/dbgjtag -f %boarddatafile% -rv -o -F inform,logfile=yes -S pathlength -S integrity
[Result]
-----[Print the board config pathname(s)]------------------------------------
C:\Users\gexiao\AppData\Local\TEXASI~1\CCS\
ti\0\0\BrdDat\testBoard.dat
-----[Print the reset-command software log-file]-----------------------------
This utility has selected a 100- or 510-class product.
This utility will load the adapter 'jioserdesusbv3.dll'.
An error occurred while soft opening the controller.
-----[An error has occurred and this utility has aborted]--------------------
This error is generated by TI's USCIF driver or utilities.
The value is '-151' (0xffffff69).
The title is 'SC_ERR_FTDI_OPEN'.
The explanation is:
One of the FTDI driver functions used during
the connect returned bad status or an error.
The cause may one or more of: invalid emulator serial number,
blank emulator EEPROM, missing FTDI drivers, faulty USB cable.
Use the xds100serial command-line utility in the 'common/uscif'
folder to verify the emulator can be located.
[End: Texas Instruments XDS100v3 USB Emulator]
此时PWM波按照初始状态的设置值输出。但JTAG口和DSP断开了。上面说好像重复20次，都无法移除错误位。如何解决呢？求助。
