CMSIS-DAP no longer working after CMPA is written (LPC55S28-EVK)

[Ridzuan]

Hi,

I'm using LPC55S28-EVK for test on writing custom data to customer factory page using this function (ffr_cust_factory_page_write()) where seal argument is set to false. After doing so, attempts to re-flash the board no longer possible due to CMSIS-DAP error. Is there any way to restore this board?

[Glynn_S]

Hello,

The board works well with Eclipse/GNU-based tools from NXP and other industry.The board also includes an on-board,CMSIS-DAP compatible debug probe, For more details, please visit our cancellation and returns page.LPC55S69-EVK - LPCXpresso55S69 Development Board mysainsburys.

[Prasadpiku6]

Hi I totally agree with you man 

Cheers. 

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[Ridzuan]

Thanks for the reply. I set the board to ISP mode by connecting jumper at J10 and P1 and I also connect a serial port to P8. However, I have tried debug with ISP and also using elftosb-gui but nothing happen. No reply is seen from blhost. Is there any instruction on how to fix similar issue like this? 

Thanks

[ZhangJennie]

Hi

Try if you can debug with ISP mode. If not, refer AN12283 to use elftosu-gui to refresh CMPA. normally this can solve the problem.

Have a nice day

Jun Zhang

[ZhangJennie]

How did you use elftosb-gui refresh CMPA? Could you please send me video or screenshots?

Thanks,

Jun Zhang