TI中文支持网仿真器型号是：XDS100v2
目标芯片型号：TMS570LS0914
两者互相连接的信号线是：nTRST、TMS、TDI、+3.3V、TDO、TCK、RTCK
在用TEST Connection的时候出现以下错误日志：
[Start: Texas Instruments XDS100v2 USB Debug Probe_0]
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\LIUZHI~1\AppData\Local\TEXASI~1\
CCS\ccs740\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 'jioserdesusb.dll'.
The library build date was 'Nov 6 2017'.
The library build time was '10:36:36'.
The library package version is '7.0.100.0'.
The library component version is '35.35.0.0'.
The controller does not use a programmable FPGA.
The controller has a version number of '4' (0x00000004).
The controller has an insertion length of '0' (0x00000000).
This utility will attempt to reset the controller.
This utility has successfully reset the controller.
—–[Print the reset-command hardware log-file]—————————–
The scan-path will be reset by toggling the JTAG TRST signal.
The controller is the FTDI FT2232 with USB interface.
The link from controller to target is direct (without cable).
The software is configured for FTDI FT2232 features.
The controller cannot monitor the value on the EMU[0] pin.
The controller cannot monitor the value on the EMU[1] pin.
The controller cannot control the timing on output pins.
The controller cannot control the timing on input pins.
The scan-path link-delay has been set to exactly '0' (0x0000).
—–[The log-file for the JTAG TCLK output generated from the PLL]———-
There is no hardware for programming the JTAG TCLK frequency.
—–[Measure the source and frequency of the final JTAG TCLKR input]——–
There is no hardware for measuring the JTAG TCLK frequency.
—–[Perform the standard path-length test on the JTAG IR and DR]———–
This path-length test uses blocks of 64 32-bit words.
The JTAG IR instruction path-length was not recorded.
—–[Perform the Integrity scan-test on the JTAG IR]————————
This test will use blocks of 64 32-bit words.
This test will be applied just once.
Do a test using 0xFFFFFFFF.
Scan tests: 1, skipped: 0, failed: 0
—–[An error has occurred and this utility has aborted]——————–
This error is generated by TI's USCIF driver or utilities.
The value is '-183' (0xffffff49).
The title is 'SC_ERR_CTL_CBL_BREAK_FAR'.
The explanation is:
The controller has detected a cable break far-from itself.
The user must connect the cable/pod to the target.
[End: Texas Instruments XDS100v2 USB Debug Probe_0]
在debug时出现如下提示：
Error connecting to the target:
(Error -183 @ 0x0)
The controller has detected a cable break far-from itself.
The user must connect the cable/pod to the target.
(Emulation package 7.0.100.0)
目前连通性已经全部测试过，各个信号都是连通的，并且每个信号上在测试连接的时候都有相应的波形
找了1天了还是没找到原因，望路过的能解答一下。
Susan Yang：
请您看一下 software-dl.ti.com/…/ccsv7_debugging_jtag_connectivity_issues.html 给出的解释
This error means the JTAG debugger is sending data to the device via the TDI pin but is not receiving anything back on the TDO pin.
This error can either have two variants: near or far from itself, which means the JTAG circuit is broken close to the JTAG debug probe or close to the board.
Note: in the specific case of XDS100 debug probes, this error may happen also if the wrong variant is selected: for example, a XDS100v2 is configured but a XDS100v1 is present on the target. Technically a cable break is detected by a pin that is grounded when the cable is plugged in. If the pin is on the connector that plugs into the target board, it is often called Cable Break Far or sometimes just Cable Break. If the pin is on the connector that plugs into the debug probe (e.g. the cable pod of an XDS560v2), that is called Cable Break Near.
Susan Yang：
Another possible cause of a "cable break far-from itself" could be that the TVRef signal (pin 5) is pulled up to the IO voltage, or TDIS (pin 4) is pulled-down to ground. TVRef should be connected to the IO voltage through a small current limiting resistor. TDIS should be connected directly to ground.
