CCS/TMS570LS1227: CCS7.2/TMS5701227：the project run with error -241

This error message means basic JTAG communication with the chip cannot be established. It can be a problem with power, the device held in reset, a USB cable or port problem, the device was previously secured by AJSM or a JTAG connection problem. Are you connecting to a TI Launchpad, or your own custom hardware?

Hi,Crosby:''

I have just connected the XDS 110 probe to circuit board developed with TMS570LS1227,the power supply is normal  when checking.In this error case,a new error  -1170 will occur  when I have pressed  "Retry" button.

when checking the chip connection under debugging menu,it  shows the Ice Pick connect successful,however the DAP disconnected  with debug probe.

If the I don't connect the XDS 110 debug probe to the  circuit board,the  CCS  report a error -267.

Believe me!Is your download line broken or out of contact, I have encountered a lot of times 。replace it with a new line.

Also, please check that the nRST pin is high.

In reply to Bob Crosby:

I appreciate your help very much.Following your advice I check that the nRST pin is pulled up,but the situation has not changed .

Can you share the JTAG connector part of your schematic? I would like to verify all of the JTAG signals are connected properly.