 2013 Microchip Technology Inc.

DS90003094A-page 5

TB3094

FIGURE 7:

ACCELERATION DATA

GAME WINNER

The participant with the highest score is the game

winner, and will see the blue LEDs at the top of the

development board flash. The participant with the

lowest score will have the red LEDs (D3 and D4) light

up momentarily.

BATTERY LOW INDICATOR

If the AA battery drops below a certain voltage, then the

message “-Lo-” will appear on the screen. If the battery

is not replaced, the game may not work properly and

wireless transmissions will have limited range. This

level is set by BATTERY_LOW_VALUE in main.c.

BOARD FEATURES

The development board contains the following features

to enable development:

1.

USB HID bootloader – the PIC18F67J94 micro-

controller can be reprogrammed using a USB

cable.

2.

Multiple test points:

a) TP1 – DI signal connects to MRF24J40 and

RA1

b) TP2

–

SCK

signal

connects

to

accelerometer and RA6

c) TP3 – DO signal connects to MRF24J40 and

RA0

d) TP4 – SDI signal connects to accelerometer

and RA4

e) TP5 – CLK signal connects to MRF24J40

and RA3

f) TP6

–

SDO

signal

connects

to

accelerometer and RA5

g) TP7 – connects to RF5, and commonly used

for UART ‘printf’ data

h) TP8 – connects to RF6, and can be

user-defined

i) TP9 – CS signal connects to accelerometer

and RC7

j) TP10 – battery output voltage, connects to

RG4

k) TP11 – Ground

3.

ICSP™ programming connection is available on

J2. The connector is not populated, but can be

added to allow programming with supported

Microchip programmers.

20

15

10

5

0

5

10

15

20

0

2040

6080

100

time

delta X