Important changes to forums and questions

All forums and questions are now archived. To start a new conversation or read the latest updates go to forums.mbed.com.

SWD error solution

Topic last updated 14 Jan 2018, by Aaron Minner. 6 replies
Andrea Corrado
30 Jul 2014

Just started MBED, i got this issue and believe i solved my SWD error, blinky now operational again.

This error ceases MBED bootloader to correctly take bin/hex to load, creating a text file in the MSD/

To solve the issues:

1) Plug Board in, wait for solid status LED

2) Press and hold reset button and at same time drag blinky on to Mass storage device.

3) Release reset and program should now load, no error.

Paco Lopez
26 Aug 2014

You can't put a bin file while reset is pressed, simply it doesn't respond

Julian van Basten
11 Oct 2014

Thanks Andrea, you really helped me into the right direction.

For the LPC4088 it applies almost the same , but there you have to hold the USER - Button while dragging your file.

Marin Assaliyski
13 Dec 2014

This worked for me on teh LPC4088, thanks Andrea and Julian!

Julian van Basten wrote:

Thanks Andrea, you really helped me into the right direction.

For the LPC4088 it applies almost the same , but there you have to hold the USER - Button while dragging your file.

Quankang Wang
22 May 2017

It works on K64F as well.... tfw it works..........

Aaron Minner
14 Jan 2018

I'd agree with Paco, above, that this shouldn't work, except I had some real difficulty trying to get my KL25Z to program, and holding the reset button while dragging the file - on a Mac - did help. So, I don't know. Try it if you're having trouble.