LPC Microcontrollers中的主题 Re: Can't debug LPC55S66JBD64

Can't debug LPC55S66JBD64

Secad — Mon, 11 Jul 2022 21:41:22 GMT

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

Re: Can't debug LPC55S66JBD64

Alice_Yang — Tue, 12 Jul 2022 10:40:01 GMT

Hello,

Does it can debug well before enable authentication ?

Alice

Re: Can't debug LPC55S66JBD64

Secad — Tue, 12 Jul 2022 13:42:37 GMT

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

Re: Can't debug LPC55S66JBD64

Alice_Yang — Wed, 13 Jul 2022 06:48:30 GMT

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.

Alice

Re: Can't debug LPC55S66JBD64

Purcell854 — Thu, 14 Jul 2022 04:27:39 GMT

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

Re: Can't debug LPC55S66JBD64

Secad — Wed, 13 Jul 2022 21:58:45 GMT

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

Re: Can't debug LPC55S66JBD64

Secad — Wed, 13 Jul 2022 22:03:45 GMT

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

Re: Can't debug LPC55S66JBD64

Alice_Yang — Thu, 14 Jul 2022 05:57:05 GMT

Hello,

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

Re: Can't debug LPC55S66JBD64

Secad — Wed, 27 Jul 2022 09:58:28 GMT

Hi,

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

Cédric