Can't debug LPC55S66JBD64

[Secad]

Hi,

I have a custom board with a LPC55S66JBD64. I am using MCUXpresso v11.5.1 with a J-Link Segger probe.

I succeed to realize the debug authentication following the AN13037:

but I can't debug the board with MCUXpresso even if I modify CMPA and CFPA configuration and set PIN/DFLT of DBGEN&SPIDEN to 'Always Enable'. I have tried to debug the "hello world" project without success.

I have the error "Failed to execute MI command". It seems that there is a problem with the GDB server

Is there something to configure on MCUXpresso to make it work?

Cheers.

Cédric

[Purcell854]

Did you ever find a solution for this? I'm in the same situation. Still getting same error message.  PointClickCare CNA

[Secad]

Hi,

Actually, I haven't found solution. I'm loading the board trought the ISP interface and I debug with the UART which is particularly annoying...

Cédric

[Alice_Yang]

Hello, 

Does it can debug well before enable  authentication ?

BR

Alice

[Secad]

Hi Alice,

I don't succeed to debug the board before enable/disable authentication. I have the same error, that's why I have tried the debug authentication.

Is it possible to debug a board with a new component (from NXP) without perform the debug authentication?

You will find bellow the error from MCUXpresso:

Error in final launch sequence: Failed to execute MI command: -target-select remote localhost:2331

Error message from debbugger back end: localhost:2331: Connection timed out

I have check the SWD connection and the reset.

Other question, during debug authentication, the debbugger should communicate with the MCU, so the SWD link should work?

Cheers.

Cédric

[Alice_Yang]

Hello ,

1) Debug authentication is a security method to debug, the prerequisite is that the board can debug well.

2) "Other question, during debug authentication, the debugger should communicate with the MCU, so the SWD link should work?"

->>NO, debugger sends the debug authentication start command to the device through the debug mailbox.

BR

Alice

[Secad]

Hi Alice,

I have checked all the board:

- Pull-up on P0_5

- SWD interface: I have check it almost 10 times...

- Power supply: 3.3V is OK, DCDC for VDD_PMU seems to be disable when the board is reset by the probe, otherwise the voltage is good

I have seen this post: https://community.nxp.com/t5/LPC-Microcontrollers/LPC5502-SWD-not-detected/m-p/1276036

Is there prefered probes to bebug the LPC55S66? I have tried PEMicro Multilink Universal, J-Link Segger and LPC-LINK2 without success.

Furthermore, I haven't understand if it's possible to debug without performing the debug authentication?

Cheers.

Cédric

[Alice_Yang]

Hello,

I mean before using authentication. Just want to confirm the SWD hardware works well before. 

[Secad · Accepted solution]

Hi,

I have bought a new Segger probe (8.08.00 J-LINK BASE) and now it works.

Cédric