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 2013 Microchip Technology Inc. DS90003094A-page 1

TB3094

INTRODUCTION

This development board has been created to

demonstrate many of the capabilities of the

PIC18F97J94 processor family (specifically, the

PIC18F67J94 device), including:

• Direct LCD drive, using a 4-common LCD display

• Serial interfacing, using the SPI protocol to

interface with an accelerometer and an IEEE

802.15.4 radio

• Use of the CTMU (Charge-Time Measurement

Unit) to perform capacitive touch sensing.

• Low-power operation, using a single 1.5V AA

battery as a power source (in conjunction with

voltage boosting chip)

• USB HID bootloader, allowing programming

through a USB cable (without requiring a

programmer)

In order to demonstrate the capabilities of the

demonstration board, a simple dancing game has been

developed. See Section “Dance Game”.

LCD DISPLAY

A 4-common, 4-digit LCD display

(Lumex #LCD-S401M16KR) is being used to display

the score. The PIC18F67J94 can support up to

8-common displays, but 4-common is a very popular

configuration among LCD displays. The PIC18F67J94

also has the capability to drive many more segments,

but this provides a starting point for many LCD

applications.

Individual segments can be controlled using Ta ble 1

(see LCD-S401M16KR data sheet for bit explanations):

The image below (Figure 1) shows the development

board with many of the main board components

indicated.

FIGURE 1: DEVELOPMENT BOARD

Author: Stephen Allen

Microchip Technology Inc.

TABLE 1:

LCDDATA0 COL 4D DP3 3D DP2 2D DP1 1D

LCDDATA8 4C 4E 3C 3E 2C 2E 1C 1E

LCDDATA164B4G3B3G2B2G1B1G

LCDDATA244A4F3A3F2A2F1A1F

™

PIC18F67J94 Development Board

Summary of content (10 pages)

PAGE 1
TB3094 PIC18F67J94 Development Board Author: LCD DISPLAY Stephen Allen Microchip Technology Inc. A 4-common, 4-digit LCD display (Lumex #LCD-S401M16KR) is being used to display the score. The PIC18F67J94 can support up to 8-common displays, but 4-common is a very popular configuration among LCD displays. The PIC18F67J94 also has the capability to drive many more segments, but this provides a starting point for many LCD applications.
PAGE 2
TB3094 IEEE 802.15.4 RADIO Wireless communication is provided through an MRF24J40MA module, and uses the MiWi® P2P protocol. The MRF24J40MA transceiver allows for easy wireless interfacing and communicates with the microcontroller through an SPI interface.The software stack for the MiWi protocol is available as part of the Microchip Library for Applications.
PAGE 3
TB3094 POWER DANCE FOLLOWER Power is supplied by a single 1.5V AA battery. An MCP1640 boosts the voltage to the 3.3V operating level for the PIC18F67J94. Resistor values used on the development board differ slightly from those listed below. Reference the schematic in Appendix A: “PIC18F67J94 Development Board Schematic” for actual resistor values used.
PAGE 4
TB3094 //MiApp_WriteData(DeltaAccel[1]); // y (no sign change on y-axis data) for same movement as "dance leader" FIGURE 5: SIDE VIEW OF MULTIPLE DANCE BATONS WITH X, Y, Z AXES INDICATED Figure 6 shows an example of how score is increased. For measurements below the EVENT_THRESHOLD, there is no comparison made. If measurements are above the EVENT_THRESHOLD (in magnitude), then the measured delta in acceleration will be compared with the value in the circular event buffer.
PAGE 5
TB3094 FIGURE 7: ACCELERATION DATA 20 15 10 delta X 5 0 0 20 40 60 80 100 delta X Ͳ5 Ͳ10 Ͳ15 Ͳ20 time 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.
PAGE 6
TB3094 4. Error messages – Error messages (sent to LCD display) are provided to alert when unintended operation occurs. Unused error messages are available for development use. TABLE 2: Error message 5.
PAGE 7
ICSP VPP/MCLR VDD GND ICSPDAT ICSPCLK NC GND BHAA-3 B1 TP11 S2 1 MCLR 2 3 4 PGD 5 PGC 6 2 J2 1 GND 3 TP10 GND VCC RG4 TP3 3 6 GND C9 4.7uF 4.7uH L1 39 40 PGC PGD RB0 RB1 RB2 RB3 MIWI_DO 48 47 46 45 44 43 42 37 24 22 MIWI_CLK 21 TP4 SDI 28 SDO 27 TP6 SCK2 U4 GND EN VFB GND GND 5 4 GND R8 309K R7 453K C11 10uF VCC 19 26 38 57 10 C8 10V 10 uF GND GND C7 0.1µF GND C6 0.
PAGE 8
BILL OF MATERIALS Quantity Designator Description Manufacturer 1 Manufacturer Part Number 1  2013 Microchip Technology Inc. 1 B1 BHAA-3 MPD (Memory Protection Devices) BHAA-3 6 C1, C2, C4, C5, C6, C7 Cap, Ceramic, 0.1uF, 50V X7R, Cap, Ceramic, 0.1uF, 50V, Cap, Ceramic, 0.1uF, 50V X7R, Cap, Ceramic, 0.1uF, 50V X7R, Cap, Ceramic, 0.1uF, 50V X7R, Cap, Ceramic, 0.
PAGE 9
Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet. • Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions. • There are dishonest and possibly illegal methods used to breach the code protection feature.
PAGE 10
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