SWD Discovery Failed for LPC55s1x and LPC55s2x

[giantmango]

Hello,

I have both LPC55s1x-EVK and LPC55s2x-EVK. They were working fine. I was able to debug with MCUXpresso IDE (v11.5.0). And suddenly I can't. MCUXpressor gave me an error saying that no device was found while my board was connected to the PC like when it was working fine.

I checked the device manager and it shows that LPC-LINK2 is still connected can be found by the MCUXpresso as shown below.

I tried to reset with ISP button and it didn't work. No hardware changes were done.

Thanks.

[diego_charles · Accepted solution]

Hi @giantmango 

Please power cycle the boards and when you get the MCU into ISP mode perform a mass erase using the MCUXpresso or  try to do that mass erase using the  Flash Magic Tool  , this communicates with ROM bootloader.

If you are encounter more problems, or do not know how to do the recommended steps let me know.

Best regards, 

Diego.