Unable to connect to core

[prachipanse]

Hi,

I am using LPC-Link2 debugger with LPCXpresso v8.2.2 and have started seeing the following error while debugging:

Nc: connecting to core 0 with handle 0x1 (using server PID -1) gave rc 'Ee(36). Could not connect to core.'
Nc: connecting to core 0 with handle 0x1 (using server PID -1) gave rc 'Ee(36). Could not connect to core.'
Nc: connecting to core 0 with handle 0x1 (using server PID -1) gave rc 'Ee(36). Could not connect to core.'
Nc: probe unbooted? no core 0?

Please let me know what could be the problem.

Regards,

Prachi

[lpcxpresso_supp]

Is your application actually doing anything in your system setup that could be putting your MCU into a "strange state" - as described at the top of the https://community.nxp.com/thread/389112 FAQ ?

What MCU and board are you using? I would certain suggest checking your debug and reset connections :

 Design Considerations for Debug 

Can you post debug logs for both working and non-working connections?

The Debug Log 

Regards,

LPCXpresso Support

[prachipanse]

Hi,

Thanks for your help. The issue doesn't seem to occur much when the Enable Code Read Protection and the Link Application to RAM options are disabled.

Thanks.

[lpcxpresso_supp]

In addition to the FAQ recommended by the Fall Guy, check to see if a rogue redlinkserv process exists. It can prevent access to the target. Once you see the reported error, check the process list. If you see a redlinkserv process but have no other debug connections active, kill the process and retry.

Thanks and regards,

LPCXpresso Support

[prachipanse]

Hi,

Thanks. Using the Vector catch and the Reset handling options and by killling the redlinkserv process, I am able to connect back to the target sometimes. However, it is inconsistent and sometimes does not recover when these options are tried.

What can be tried further?

Regards,

Prachi

[thefallguy]

You have probably got your chip into a strange state. This FAQ describes how to regain access:

https://community.nxp.com/thread/389112