
© Copyright ARM Limited 2016. All rights reserved.
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ARM-EPM-1017464.0
Confidential
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9
FW UPDATE PROCEDURE
Firmware updates may be periodically supplied by ARM. This procedure describes how to update firmware for the
BT4 Demonstration SoC via the drag-n-drop programming capabilities provided by the on-board mbed controller.
If you are using the BT4 Eval board as a code development platform you can use this same procedure to update
the boards with your custom firmware.
Please do the following:
1.
Copy the FW file to your PC’s desktop
2.
On the BT4 Eval board, slide the Power Mode switch UP
to the “Line” position (See below)
3.
Insure that both SWD jumpers (J6 & 7) that are located above the USB connector are in the
“MBED”
positions. (In the lower jumper position as shown).
Figure 8.0
– FW Programming Jumper/Switch Selection
4.
Plug in the USB cable to your PC and the board. The board should enumerate as a mass storage device
and a window should open up on your PC. There should be a single file listed by the name of “mbed.htm”.
(If you have your PC configured to not support pop-up windows, y
ou may have to select “My Computer”
and open up the appropriate drive on the list provided).
5.
Drag and drop the FW file from your desktop into the Mass storage window.
6.
The Red LED next to the USB connector should flash quickly for about 15-20 seconds during
programming. Once the programming is complete, the Red LED will stop and the drive will un-enumerate
on your PC.
Firmware programing is complete at this time
Power down the board by unplugging the USB cable and plug it back in if you wish to power the board via 5 volts
from the USB cable.