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DEF CON 27 Electronic Shoot Badge User/Hacker Manual

If you want to know what the menu options do, or how to hack your badge, you are in the right place. Thanks to SeeEss for the original DC23 shoot badge which this badge is heavily based upon, particularly the firmware.

Menu quick reference

The menu is brought up by pressing SELECT (right button) in most modes.

Count - Simply counts up or down, use Setdig to set digits
Timer - Main Shot timer mode, press START (Left button), to begin after a random delay. Press START again to end, and START scrolls through shot times.
Shot - Shot counting mode, simply counts total impulses. See also: Thresh, setdig
Rand - Random segments scrolling across display, just a display effect
Hype - Repeatedly displays "Defcon Shoot"
Audio - Displays raw audio levels, useful for setting threshold, hold START for peak detect.
Setdig - Manually sets digits used in "count" and "shot" mode.
Tilt - Reverses the sense of the tilt sensor. If the display is upside down use this.
Thresh - Sets the threshold for shot detection. A setting of 40 or higher is usually recommended. Too low can prevent detection if the environment is noisy.
Speed - Sets the speed for various effects, such as hype, count
Bright - Display brightness. Higher settings use battery power much more quickly.
Play
- React - Simple reaction time game
- Dodge - Dodge the block/spaceship game
- Batt - Provides a voltage readout.
- Sound - A sound visualizer. Affected by "tilt" setting. Isn't quite working correctly, probably could be fixed in software.
- Clap - "Clapper" mode. For more information, see SeeEss's writeup of the original DC23 badge.
- Morse - The display will produce morse code strings, including an option to program your own string.
Quit - Exits the menu

Guide to hardware

If you'd like to run the entire board off 3.3v, two sets of jumpers must be reconfigured. Set 1 in the picture above must have the horizontal jumpers removed and the left vertical side jumpered. Set 2 can be bridged completely 4-ways with a single ball of solder. This will run the entire board off the 3.3v regulator that otherwise is only used for the Shitty-Add-On header. The board normally runs off unregulated power in the as-shipped configuration.

A prototyping area is provided near the bottom of the board. These pads are connected in a "stripboard" configuration, except for the Vcc and GND pads, which are arranged in a way that a second linear regulator could be installed, if desired. After removing the battery holder, the configuration of the pads should become more obvious.

Connector J3 Pin Num	PIC16F1709 Pin Num	Pin Description	Signal Name	Pickit3 Pinout
Pin 1	Pin 4	RA3	Start Btn	CS/Tx
Pin 2	Pin 5	RC5	Segment E
Pin 3	Pin 6	RC4	Segment D
Pin 4	Pin 7	RC3	Segment C
Pin 5	Pin 8	RC6	Segment F
Pin 6	Pin 9	RC7	Segment G
Pin 7	Pin 10	RB7	Digit 4
Pin 8	Pin 11	RB6	Digit 3
Pin 9	Pin 1	VDD	VDD_VBAT	+V
Pin 10	Pin 20	VSS	GND	GND
Pin 11	Pin 12	RB5	Digit 2
Pin 12	Pin 13	RB4	Digit 1
Pin 13	Pin 14	RC2	Segment B
Pin 14	Pin 15	RC1	Segment A
Pin 15	Pin 16	RC0	Segmnt DP
Pin 16	Pin 17	RA2	Tilt Sensor
Pin 17	Pin 18	RA1	Mic	SCL/SCK
Pin 18	Pin 19	RA0	Select Btn	SDA/SDI
Pin 19	Pin 2	RA5	Digit 6
Pin 20	Pin 3	RA4	Digit 5

Firmware

The firmware is largely the same as the DEF CON 23 electronic shoot badge, and the 23 firmware should run unmodified. You will, however, need a hacked version of XPLAB or the commercial version, in order to enable optimizations, otherwise it will not fit on the chip.

The DEF CON 23 shoot badge firmware can be found on SeeEss' Github Project