SwdRead: Timeout waiting for response_"LPC55s28"

[Trada94]

Hello community,

I have the following issue when I trying to lock the MCU LPC55sXX. 

I am following these steps to lock the MCU:

1.- Configure the MCU in ISP mode.

2.- Write the bin file to the CFPA.

3.- Write the bin file to the CMPA.

4.- Verify if the MCU is locked and expected the following result:

The issue occurs intermittently.

Any help would be greatly appreciated. 

[Trada94]

Hello @Alice_Yang 

I am trying to understand the functions of CMPA and CFPA. 

Could you please explain what they are?

Thanks, I really appreciate your help

AE

[Alice_Yang]

Hello @Trada94 

CMPA (Configuration Memory Protection Area) and CFPA (Code Flash Protection Area) are mainly used to store security-related configuration information and provide protection functions for memory areas.

For details, please refer to "Chapter 10: LPC55S6x/LPC55S2x/LPC552x Protected Flash Region" of UM11126.

BR

Alice

[Alice_Yang]

Hello @Trada94 

To disable the ISP and SWD of LPC55xx, please refer to

https://community.nxp.com/t5/LPC-Microcontrollers-Knowledge/LPC55-Disable-ISP-and-SWD-to-utilize-cod... 

BR

Alice