How can I go to DFU mode with code?

akrusen · June 15, 2014, 3:11pm

I flash the Spark Core a lot. I do work locally and would love to attach one extra button which triggers the DFU mode. So, can DFU mode be initiated from code?

sej7278 · June 15, 2014, 3:20pm

actually i’d like to know this, pressing/holding button combinations seems very 1982

make program-dfu should really put the core into dfu mode first

peekay123 · June 15, 2014, 5:17pm

The DFU code is handled in the bootloader. Perhaps @zachary could comment?

ACTUALLY - check this out:

kennethlimcp · June 15, 2014, 11:00pm

Take a look at this

zachary · June 16, 2014, 3:10pm

to the tips & tricks link Kenneth provided.

When the Core boots up, the first thing that runs is the bootloader. Based on the state of the button and a handful of system flags, it decides what to do next. To get it to jump into DFU mode, the FLASH_OTA_Update_SysFlag has to have a value that gets to the last else statement here, and zero is a good value to choose:

github.com

particle-iot/bootloader/blob/master/src/main.c

/**
 ******************************************************************************
 * @file    main.c
 * @authors  Satish Nair, Zachary Crockett and Mohit Bhoite
 * @version V1.0.0
 * @date    30-April-2013
 * @brief   main file
 ******************************************************************************
  Copyright (c) 2013 Spark Labs, Inc.  All rights reserved.

  This program is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation, either
  version 3 of the License, or (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  Lesser General Public License for more details.

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How can I go to DFU mode with code?

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