User Manual

dfu-util 0.8

This program is Free Software and has ABSOLUTELY NO WARRANTY

Please report bugs to dfu-util@lists.gnumonks.org

dfu-util: Invalid DFU suffix signature

dfu-util: A valid DFU suffix will be required in a future dfu-util release!!!

Opening DFU capable USB device...

ID 239a:0008

Run-time device DFU version 011a

Claiming USB DFU Interface...

Setting Alternate Setting #0 ...

Determining device status: state = dfuIDLE, status = 0

dfuIDLE, continuing

DFU mode device DFU version 011a

Device returned transfer size 1024

DfuSe interface name: "Internal Flash "

Downloading to address = 0x08010000, size = 464516

Download [=========================] 100% 464516 bytes

Download done.

File downloaded successfully

Error during download get_status

At this point you have reflashed the FeatherLib section of code, and you should be able to flash your own code from

the Arduino IDE in the 'User Code' section of flash memory.

How can I reflash the bootloader with a JLink or STLink/V2 from the Arduino IDE?

To reflash the bootloader on your WICED Feather using the Arduino IDE perform the following steps:

First install AdaLink on your system, which is an abstraction layer that we provide to hide the details of different ARM

hardware debuggers. If you have a choice, a Segger JLink is generally more reliable as a HW debugger and works

across a larger variety of systems. The STLink with OpenOCD has issues with OS X El Capitan due to the new USB

stack, for example.

To connect an STLink/V2 to the WICED Feather:

Connect SWCLK on the STLink to SWCLK on the WICED Feather (which is a single 0.1" hole off the main

NOTE: The WICED Feather also requires a valid user sketch (some Arduino code) to run, so after flashing the

FeatherLib you will also need to compile and flash a sketch from the Arduino IDE for your board to start

running. Powering up a board with only FeatherLib but no user sketch will end up in a 'dead-end' situation

since it can't find any user code to execute.

Note++: Unlike many other Arduino compatible boards, you don't need a serial port to flash sketches from the

Arduino IDE! The WICED Feather uses USB DFU, NOT the serial port for firmware updates! Don't worry if you

don't see a serial port when you are trying to flash a sketch the first time.