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CCS连接AM437x板卡提示IR和DR链条不通导致无法连接

最近在使用CCS6.1做AM437x板卡的开发工作,板子是基于AM437x系列的芯片,但在没想到第一步硬件连接的时候就遇到了问题。在板子和emulator之间使用了两个转接头来匹配连接,在使用BlackHawk的USB200 emulator连接板子时,Target Connection部分出现了以下错误:

[Start: Texas Instruments XDS2xx USB Debug Probe_0]

Execute the command:

%ccs_base%/common/uscif/dbgjtag -f %boarddatafile% -rv -o -S integrity

[Result]

—–[Print the board config pathname(s)]————————————

C:\Users\JTAG\AppData\Local\TEXASI~1\CCS\
ti\1\0\BrdDat\testBoard.dat

—–[Print the reset-command software log-file]—————————–

This utility has selected a 560/2xx-class product.
This utility will load the program 'xds2xxu.out'.
The library build date was 'Sep 5 2015'.
The library build time was '01:01:44'.
The library package version is '6.0.14.5'.
The library component version is '35.35.0.0'.
The controller does not use a programmable FPGA.
The controller has a version number of '13' (0x0000000d).
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]—————————–

This emulator does not create a reset log-file.

—–[An error has occurred and this utility has aborted]——————–

This error is generated by TI's USCIF driver or utilities.

The value is '-233' (0xffffff17).
The title is 'SC_ERR_PATH_BROKEN'.

The explanation is:
The JTAG IR and DR scan-paths cannot circulate bits, they may be broken.
An attempt to scan the JTAG scan-path has failed.
The target's JTAG scan-path appears to be broken
with a stuck-at-ones or stuck-at-zero fault.

[End: Texas Instruments XDS2xx USB Debug Probe_0]

但我用仿真器连接其他的DM6446开发板都是成功的,板子的JTAG功能正常,想请教一下会是什么问题导致这个情况呢?

Jian Zhou:

首先CCS下测试连接会报什么样的错误?我怀疑是转接头的问题。

kailu zhang:

回复 Jian Zhou:

Dear Jian Zhou:

        我有重新制作过转接头,但由于板子没有标准的JTAG接口,所以我把相应的信号焊线拉出来到转接头上。

Jian Zhou:

回复 kailu zhang:

Jtag一般对信号有要求,如果是飞线出来的估计信号不稳定。

kailu zhang:

回复 Jian Zhou:

Dear Jian Zhou :

         我按照之前的方法将手中的beaglebone Black 也通过USB200仿真器连接CCS6.1,但是也出现了上面的IR与DR的问题,请问这是否是和仿真器与芯片类型不兼容的原因造成的?

Z T:

回复 kailu zhang:

你好,我遇到了和你同样的问题,我的JTAG和目标板的连接也是飞线,我用的是仿真器是00IC-XDS200 。

请问你的问题解决了吗?

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