Low-Cost mTouch®
Evaluation Kit
User’s Guide
2015 Microchip Technology Inc.
DS40001818A
Note the following details of the code protection feature on Microchip devices:
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Microchip products meet the specification contained in their particular Microchip Data Sheet.
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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. All of these methods, to our
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•
Microchip is willing to work with the customer who is concerned about the integrity of their code.
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Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our
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Information contained in this publication regarding device
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and may be superseded by updates. It is your responsibility to
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Trademarks
The Microchip name and logo, the Microchip logo, dsPIC,
FlashFlex, flexPWR, JukeBlox, KEELOQ, KEELOQ logo, Kleer,
LANCheck, MediaLB, MOST, MOST logo, MPLAB,
OptoLyzer, PIC, PICSTART, PIC32 logo, RightTouch, SpyNIC,
SST, SST Logo, SuperFlash and UNI/O are registered
trademarks of Microchip Technology Incorporated in the
U.S.A. and other countries.
The Embedded Control Solutions Company and mTouch are
registered trademarks of Microchip Technology Incorporated
in the U.S.A.
Analog-for-the-Digital Age, BodyCom, chipKIT, chipKIT logo,
CodeGuard, dsPICDEM, dsPICDEM.net, ECAN, In-Circuit
Serial Programming, ICSP, Inter-Chip Connectivity, KleerNet,
KleerNet logo, MiWi, motorBench, MPASM, MPF, MPLAB
Certified logo, MPLIB, MPLINK, MultiTRAK, NetDetach,
Omniscient Code Generation, PICDEM, PICDEM.net, PICkit,
PICtail, RightTouch logo, REAL ICE, SQI, Serial Quad I/O,
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ViewSpan, WiperLock, Wireless DNA, and ZENA are
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GestIC is a registered trademark of Microchip Technology
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Technology Inc., in other countries.
All other trademarks mentioned herein are property of their
respective companies.
© 2015, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
ISBN: 978-1-63277-997-7
QUALITY MANAGEMENT SYSTEM
CERTIFIED BY DNV
== ISO/TS 16949 ==
DS40001818A-page 2
Microchip received ISO/TS-16949:2009 certification for its worldwide
headquarters, design and wafer fabrication facilities in Chandler and
Tempe, Arizona; Gresham, Oregon and design centers in California
and India. The Company’s quality system processes and procedures
are for its PIC® MCUs and dsPIC® DSCs, KEELOQ® code hopping
devices, Serial EEPROMs, microperipherals, nonvolatile memory and
analog products. In addition, Microchip’s quality system for the design
and manufacture of development systems is ISO 9001:2000 certified.
2015 Microchip Technology Inc.
Object of Declaration: Low-Cost mTouch® Evaluation Kit User’s Guide
2015 Microchip Technology Inc.
DS40001818A-page 3
PIC16LF1559 mTouch® Evaluation Kit User’s Guide
NOTES:
DS40001818A-page 4
2015 Microchip Technology Inc.
LOW-COST mTouch® EVALUATION KIT
USER’S GUIDE
Table of Contents
Preface ........................................................................................................................... 6
Chapter 1. Low-Cost mTouch Evaluation Kit Overview
1.1 Introduction ................................................................................................... 11
1.1.1 Kit Contents ............................................................................................... 11
1.2 Board Overview ............................................................................................ 11
1.2.1 Low-Cost Evaluation Board ....................................................................... 11
1.2.2 MCP2221 Breakout Module ...................................................................... 12
1.3 Board Setup ................................................................................................. 13
Chapter 2. Communication and System Register
2.1 Introduction ................................................................................................... 15
2.1.1 mTouch I2C communication protocols ....................................................... 15
2.1.1.1 Write Byte .................................................................................. 15
2.1.1.2 Read Byte .................................................................................. 15
2.1.1.3 Write Block ................................................................................ 15
2.1.1.4 Read Block ................................................................................ 16
2.1.2 System Register Description ..................................................................... 16
Chapter 3. Work with mTouch Dawn GUI
3.1 Dawn GUI Installation ................................................................................... 20
3.2 GUI Overview ............................................................................................... 21
Appendix A. Low-Cost mTouch Evaluation Board
Worldwide Sales and Service .................................................................................... 26
2015 Microchip Technology Inc.
DS40001818A-page 5
LOW-COST mTouch® EVALUATION KIT
USER’S GUIDE
Preface
NOTICE TO CUSTOMERS
All documentation becomes dated, and this manual is no exception. Microchip tools and
documentation are constantly evolving to meet customer needs, so some actual dialogs
and/or tool descriptions may differ from those in this document. Please refer to our website
(www.microchip.com) to obtain the latest documentation available.
Documents are identified with a “DS” number. This number is located on the bottom of each
page, in front of the page number. The numbering convention for the DS number is
“DSXXXXXA”, where “XXXXX” is the document number and “A” is the revision level of the
document.
For the most up-to-date information on development tools, see the MPLAB® IDE online help.
Select the Help menu, and then Topics to open a list of available online help files.
INTRODUCTION
This chapter contains general information that will be useful to know before using the
Low-Cost mTouch® Evaluation Kit. Items discussed in this chapter include:
•
•
•
•
•
•
•
•
Document Layout
Conventions Used in this Guide
Warranty Registration
Recommended Reading
The Microchip Website
Development Systems Customer Change Notification Service
Customer Support
Revision History
DOCUMENT LAYOUT
This document describes how to use the Low-Cost mTouch Evaluation Kit as a
development tool to evaluate mTouch 1D solution, as well as how to develop a
capacitive sensing application based on this kit. The document is organized as follows:
• Chapter 1. “Low-Cost mTouch Evaluation Kit Overview” – Offers information
on the hardware of the evaluation kit.
• Chapter 2. “Communication and System Register” – Introduces the I2C
communication protocol and registers for the mTouch system.
• Chapter 3. “Work with mTouch Dawn GUI” – Explains how to use Dawn GUI for
this evaluation kit.
• Appendix A. “Low-Cost mTouch Evaluation Board” – Provides the schematic
and layout for this evaluation kit.
DS40001818A-page 6
2015 Microchip Technology Inc.
Preface
CONVENTIONS USED IN THIS GUIDE
This manual uses the following documentation conventions:
DOCUMENTATION CONVENTIONS
Description
Arial font:
Italic characters
Initial caps
Quotes
Underlined, italic text with
right angle bracket
Bold characters
N‘Rnnnn
Text in angle brackets < >
Courier New font:
Plain Courier New
Represents
Referenced books
Emphasized text
A window
A dialog
A menu selection
A field name in a window or
dialog
A menu path
MPLAB® IDE User’s Guide
...is the only compiler...
the Output window
the Settings dialog
select Enable Programmer
“Save project before build”
A dialog button
A tab
A number in verilog format,
where N is the total number of
digits, R is the radix and n is a
digit.
A key on the keyboard
Click OK
Click the Power tab
4‘b0010, 2‘hF1
Italic Courier New
Sample source code
Filenames
File paths
Keywords
Command-line options
Bit values
Constants
A variable argument
Square brackets [ ]
Optional arguments
Curly brackets and pipe
character: { | }
Ellipses...
Choice of mutually exclusive
arguments; an OR selection
Replaces repeated text
Represents code supplied by
user
2015 Microchip Technology Inc.
Examples
File>Save
Press <Enter>, <F1>
#define START
autoexec.bat
c:\mcc18\h
_asm, _endasm, static
-Opa+, -Opa0, 1
0xFF, ‘A’
file.o, where file can be
any valid filename
mcc18 [options] file
[options]
errorlevel {0|1}
var_name [,
var_name...]
void main (void)
{ ...
}
DS40001818A-page 7
Low-Cost mTouch® Evaluation Kit User’s Guide
WARRANTY REGISTRATION
Please complete the enclosed Warranty Registration Card and mail it promptly.
Sending in the Warranty Registration Card entitles users to receive new product
updates. Interim software releases are available at the Microchip website.
RECOMMENDED READING
This user’s guide describes how to use the Low-Cost mTouch® Evaluation Kit. Other
useful documents are listed below. The following Microchip documents are available
and recommended as supplemental reference resources.
http://www.microchip.com
PIC16LF1554/1559 20-Pin Flash, 8-Bit Microcontroller Data Sheet
(DS40001761)
This data sheet provides detailed information regarding the PIC16LF1559.
DS40001818A-page 8
2015 Microchip Technology Inc.
Preface
THE MICROCHIP WEBSITE
Microchip provides online support via our website at www.microchip.com. This website
is used as a means to make files and information easily available to customers. Accessible by using your favorite Internet browser, the website contains the following information:
• Product Support – Data sheets and errata, application notes and sample
programs, design resources, user’s guides and hardware support documents,
latest software releases and archived software
• General Technical Support – Frequently Asked Questions (FAQs), technical
support requests, online discussion groups, Microchip consultant program
member listing
• Business of Microchip – Product selector and ordering guides, latest Microchip
press releases, listing of seminars and events, listings of Microchip sales offices,
distributors and factory representatives
DEVELOPMENT SYSTEMS CUSTOMER CHANGE NOTIFICATION SERVICE
Microchip’s customer notification service helps keep customers current on Microchip
products. Subscribers will receive e-mail notification whenever there are changes,
updates, revisions or errata related to a specified product family or development tool of
interest.
To register, access the Microchip website at www.microchip.com, click on Customer
Change Notification and follow the registration instructions.
The Development Systems product group categories are:
• Compilers – The latest information on Microchip C compilers, assemblers, linkers
and other language tools. These include all MPLAB C compilers; all MPLAB
assemblers (including MPASM™ assembler); all MPLAB linkers (including
MPLINK™ object linker); and all MPLAB librarians (including MPLIB™ object
librarian).
• Emulators – The latest information on Microchip in-circuit emulators.This
includes the MPLAB REAL ICE™ and MPLAB ICE 2000 in-circuit emulators.
• In-Circuit Debuggers – The latest information on the Microchip in-circuit
debuggers. This includes MPLAB ICD 3 in-circuit debuggers and PICkit™ 3
debug express.
• MPLAB® IDE – The latest information on Microchip MPLAB IDE, the Windows®
Integrated Development Environment for development systems tools. This list is
focused on the MPLAB IDE, MPLAB IDE Project Manager, MPLAB Editor and
MPLAB SIM simulator, as well as general editing and debugging features.
• Programmers – The latest information on Microchip programmers. These include
production programmers such as MPLAB REAL ICE in-circuit emulator, MPLAB
ICD 3 in-circuit debugger and MPLAB PM3 device programmers. Also included
are nonproduction development programmers such as PICSTART® Plus and
PICkit 2 and 3.
2015 Microchip Technology Inc.
DS40001818A-page 9
Low-Cost mTouch® Evaluation Kit User’s Guide
CUSTOMER SUPPORT
Users of Microchip products can receive assistance through several channels:
•
•
•
•
Distributor or Representative
Local Sales Office
Field Application Engineer (FAE)
Technical Support
Customers should contact their distributor, representative or field application engineer
(FAE) for support. Local sales offices are also available to help customers. A listing of
sales offices and locations is included in the back of this document.
Technical support is available through the website at:
http://www.microchip.com/support.
REVISION HISTORY
Revision A (November 2015)
Initial release of this document.
DS40001818A-page 10
2015 Microchip Technology Inc.
LOW-COST mTouch® EVALUATION KIT
USER’S GUIDE
Chapter 1. Low-Cost mTouch® Evaluation Kit Overview
1.1
INTRODUCTION
The Low-Cost mTouch Evaluation Kit provides a simple and flexible platform for
demonstrating and developing a variety of capacitive sensing applications. The
controller board utilizes the dual high-speed ADCs with automated hardware CVD
modules to scan one proximity and five button sensors. The firmware supplied with the
controller board has been optimized for moisture resistance and noise immunity.
The kit also includes the MCP2221 breakout module, which allows the controller board
to communicate with mTouch Dawn GUI. The Dawn GUI displays touch configuration
and signals for real-time debugging.
1.1.1
Kit Contents
• Low-Cost Controller Board with detachable sensors
• MCP2221 Breakout Module
• Mini to USB B Cable
1.2
BOARD OVERVIEW
This kit includes the Low-Cost mTouch Controller Board and MCP2221 Breakout
Module. They work in conjunction to provide real-time configuration and touch data to
PC GUI.
1.2.1
LOW-COST EVALUATION BOARD
TM
FIGURE 1-1:
Low-Cost Evaluation Board
®
2015 Microchip Technology Inc.
®
DS40001818A-page 11
Low-Cost mTouch® Evaluation Kit User’s Guide
Figure 1-1 shows the Low-Cost mTouch Evaluation board. It includes a proximity loop
sensor, five touch button sensors, six LEDs, an ICSP™ header and PICkit™ Serial
interface.
The default firmware scans the proximity and touch buttons periodically, and uses the
LEDs to indicate the proximity and button state. If a proximity or touch event is
detected, the corresponding LED will be lit. An I2C interface is also implemented to
communicate with a host system through the header marked with “PICkit SA”, which
accommodates the PICkit Serial Analyzer pin-out. This feature allows the system not
only to report its sensor data in real-time, but to be configured by a host device as well.
1.2.2
MCP2221 Breakout Module
The Evaluation Kit comes with the MCP2221 Breakout Module (ADM00559) as shown
in Figure 1-2. This module works as an I2C to USB bridge in this evaluation kit.
FIGURE 1-2:
MCP2221 BREAKOUT MODULE
Refer to MCP2221 Breakout Module User’s Guide for more information on this breakout module.
DS40001818A-page 12
2015 Microchip Technology Inc.
Low-Cost mTouch® Evaluation Kit Overview
1.3
BOARD SETUP
Before evaluating the kit, two boards in the kit need to be connected as shown in
Figure 1-3, and then powered by the mini USB cable. After powering the kit, the
proximity and touch functions will work out-of-box. The LEDs will reflect the state of
proximity sensor and each touch button.
BOARD SETUP
TM
FIGURE 1-3:
®
®
The sensor portion of the low-cost board can be snapped off from the whole board, so
that a different sensor can be connected to the controller through the P3 connector.
This provides flexibility for quick prototyping and evaluating different sensor designs. In
Figure 1-4, a four-channel slider is connected to the controller board through the P3
connector.
SLIDER SENSOR EXAMPLE
®
FIGURE 1-4:
TM
2015 Microchip Technology Inc.
DS40001818A-page 13
Low-Cost mTouch® Evaluation Kit User’s Guide
NOTES:
DS40001818A-page 14
2015 Microchip Technology Inc.
LOW-COST mTouch® EVALUATION KIT
USER’S GUIDE
Chapter 2. Communication and System Register
2.1
INTRODUCTION
The default firmware on the Low-cost Evaluation Board communicates with host
system through a register-based I2C communication protocol.
mTouch I2C communication protocols
2.1.1
The default I2C slave address for this evaluation board is 0x28 (7-bit address). The
evaluation board supports the following protocols: Read Byte, Write Byte, Read Block,
and Write Block. Please note that the system register referred in this document is on
the firmware level, not the PIC® microcontroller registers in the data sheet.
2.1.1.1
WRITE BYTE
The Write Byte protocol is used to write one byte of data to a specific register as shown
in Table 2-1.
TABLE 2-1:
WRITE BYTE PROTOCOL
Slave
address
Start
1->0
W
0b101000
Register
Address
ACK
0
0
2.1.1.2
XXh
Register
Data
ACK
0
ACK
XXh
Stop
0
0->1
READ BYTE
The Read Byte protocol is used to read one byte of data from the register shown in
Table 2-2.
TABLE 2-2:
Start
1->0
READ BYTE PROTOCOL
Slave
address
0b101000
W
0
Register
Address
ACK
0
XXh
2.1.1.3
ACK
0
Start
1->0
Slave
address
0b101000
R
1
ACK
0
Register
Data
XXh
Nack
1
Stop
0->1
WRITE BLOCK
The Write Block protocol is used to write multiple bytes to a group of contiguous
registers as shown in Table 2-3. The internal Address Pointer will be automatically
incremented after every byte is received.
TABLE 2-3:
Start
1->0
WRITE BLOCK PROTOCOL
Slave
address
0b101000
W
0
ACK
0
Register
Address
XXh
ACK
0
Register
Data
XXh
ACK
0
data @ start address
2015 Microchip Technology Inc.
...
...
Register
Data
XXh
ACK
0
Stop
0->1
data @ (start address + n)
DS40001818A-page 15
Low-Cost mTouch® Evaluation Kit User’s Guide
2.1.1.4
READ BLOCK
The Read Block protocol is used to read multiple data bytes from a group of contiguous
registers as shown in Table 2-4. The internal Address Pointer will be automatically
incremented after every byte is received.
TABLE 2-4:
READ BLOCK PROTOCOL
Slave
address
Start
W
ACK
1->0
0b101000
0
0
...
Register
Data n
Nack
Stop
...
XXh
1
0->1
Register
Address
XXh
ACK
0
Start
1->0
Slave
address
R
0b101000 1
ACK
0
Register
Data
XXh
ACK
0
data @ (start address + n)
data @ start address
2.1.2
System Register Description
The protocol packet that is described above only contains one byte for system register
address, so the addressing range is from 0 to 255 locations for a single command. To
extend the addressing range, the firmware has partitioned the system memory in
“banks”. Each bank has 256 locations and you can switch the active bank by writing the
bank index to the bank register, which will be shown in the following tables.
The registers shown in Table 2-5 are accessible from the communication protocol
described above. Table 2-6 describes the details of each register.
TABLE 2-5:
Register
Bank
REGISTER MAP
Register
Addresses
R/W
Register Name
Function
Default
Values
0x00
0x01
R
Touch State Mask
Returns the touch state of proximity/touch sensor inputs
0x00
0x00
0x10
R
Proximity Signal Deviation
Stores the delta count for proximity sensor
0x00
0x00
0x11
R
Button 0 Signal Deviation
Stores the delta count for touch button 0
0x00
0x00
0x12
R
Button 1 Signal Deviation
Stores the delta count for touch button 1
0x00
0x00
0x13
R
Button 2 Signal Deviation
Stores the delta count for touch button 2
0x00
0x00
0x14
R
Button 3 Signal Deviation
Stores the delta count for touch button 3
0x00
0x00
0x15
R
Button 4 Signal Deviation
Stores the delta count for touch button 4
0x00
0x00
0x40
R/W
Proximity Threshold
Stores the delta count threshold for proximity sensor
0x64
0x00
0x41
R/W
Button 0 Threshold
Stores the delta count threshold for touch button 0
0x40
0x00
0x42
R/W
Button 1 Threshold
Stores the delta count threshold for touch button 1
0x40
0x00
0x43
R/W
Button 2 Threshold
Stores the delta count threshold for touch button 2
0x40
0x00
0x44
R/W
Button 3 Threshold
Stores the delta count threshold for touch button 3
0x40
0x00
0x45
R/W
Button4 Threshold
Stores the delta count threshold for touch button 4
0x40
0x00
0x70
R/W
Calibration State Mask
Return the calibration state of proximity/touch sensors
inputs
0x00
DS40001818A-page 16
2015 Microchip Technology Inc.
Communication and System Register
TABLE 2-5:
Register
Bank
REGISTER MAP
Register
Addresses
R/W
Register Name
0x00
0x80
R/W
Proximity Scaling Factor
Stores the delta count scaling factor for proximity
sensor
0x0A
0x00
0x81
R/W
Button 0 Scaling Factor
Stores the delta count scaling factor for button 0
0x0A
0x00
0x82
R/W
Button 1 Scaling Factor
Stores the delta count scaling factor for button 1
0x0A
0x00
0x83
R/W
Button 2 Scaling Factor
Stores the delta count scaling factor for button 2
0x0A
0x00
0x84
R/W
Button 3 Scaling Factor
Stores the delta count scaling factor for button 3
0x0A
0x00
0x85
R/W
Button 4 Scaling Factor
Stores the delta count scaling factor for button 4
0x0A
0x00
0xB0
R/W
Reading Gain
Store the reading gain for all sensor inputs
0x02
0x00
0xB1
R/W
Baseline Gain
Store the baseline gain for all sensor inputs
0x04
0x00
0xB2
R/W
Baseline Rate
Store the Baseline Rate fro all sensor inputs
0x10
0x00
0xC0
R/W
Negative Delta Count
Store the threshold of consecutive number of negative
delta
0x10
0x00
0xC1
R/W
Press Timeout
Store the timeout count for pressed sensor inputs
0x0A
0x00
0xC2
R/W
Debounce
Store the debounce count for all sensor inputs
0x00
0x01
0x10
R
0x01
0x11
R
Proximity Reading
Store the unscaled proximity sensor readings
0x000000
0x01
0x12
R
0x01
0x13
R
0x01
0x14
R
Button 0 Reading
Store the unscaled button 0 readings
0x000000
0x01
0x15
R
0x01
0x16
R
0x01
0x17
R
Button 1 Reading
Store the unscaled button 1 readings
0x000000
0x01
0x18
R
0x01
0x19
R
0x01
0x20
R
Button 2 Reading
Store the unscaled button 2 readings
0x000000
0x01
0x21
R
0x01
0x22
R
0x01
0x23
R
Button 3 Reading
Store the unscaled button 3 readings
0x000000
0x01
0x24
R
0x01
0x25
R
0x01
0x26
R
Button 4 Reading
Store the unscaled button 4 readings
0x000000
0x01
0x27
R
0x02
0x10
R
0x02
0x11
R
Proximity Baseline
Store the unscaled proximity sensor baseline
0x000000
0x02
0x12
R
2015 Microchip Technology Inc.
Default
Values
Function
DS40001818A-page 17
Low-Cost mTouch® Evaluation Kit User’s Guide
TABLE 2-5:
Register
Bank
REGISTER MAP
Register
Addresses
R/W
0x02
0x13
R
0x02
0x14
R
0x02
0x15
R
0x02
0x16
R
0x02
0x17
R
0x02
0x18
R
0x02
0x19
R
0x02
0x20
R
0x02
0x21
R
0x02
0x22
R
0x02
0x23
R
0x02
0x24
R
0x02
0x25
R
0x02
0x26
R
0x02
0x27
R
0xF0
R/W
Active Bank
0xF1
R
Sensor Input Count
0xF7
R
0xF8
R
0xF9
R
0xFA
R
0xFB
R
0xFC
R
0xFD
R
Build Number
Stores a fixed value that represents the build number
0x00
0xFE
R
Minor Version
Stores a fixed value that represents the minor version
number
0x00
0xFF
R
Major Version
Stores a fixed value that represents the major version
number
0x01
Available in all
banks
DS40001818A-page 18
Register Name
Function
Default
Values
Button 0 Baseline
Store the unscaled button 0 baseline
0x000000
Button 1 Baseline
Store the unscaled button 1 baseline
0x000000
Button 2 Baseline
Store the unscaled button 2 baseline
0x000000
Button 3 Baseline
Store the unscaled button 3 baseline
0x000000
Button 4 Baseline
Store the unscaled button 4 baseline
0x000000
Product ID
Manufacture ID
Store the current active bank value
0x00
Return the count of sensor inputs
0x06
Store a fixed value that identifies each product
(Little Endian)
Store a fixed value that identifies Microchip
(Little Endian)
0x00000001
0x0001
2015 Microchip Technology Inc.
Communication and System Register
TABLE 2-6:
REGISTER DESCRIPTION
Register Name
Description
Touch State Mask
Bit 0 represents the touch state of proximity loop sensor, bit 1-5 represent the touch state
of button 1-5, respectively. ‘0’ means no touch, ‘1’ means touch detected.
Proximity/Button Signal
Deviation
This signal deviation register stores an 8-bit 2’s compliment signed value to represent the
sensor delta value, which then compares with threshold to determine if a touch has been
detected.
Proximity/Button
Threshold
The Proximity/Button Threshold registers store the signal deviation threshold that is used
to determine if a touch has been detected.
Calibration State Mask
Bit 0 represents the calibration state of proximity loop sensor, bit1-5 represent the calibration state of touch button 1-5, respectively. ‘0’ means calibration completed, ‘1’ means calibration is in process. Write ‘1’ to a bit in this register will force a calibration on the
corresponding sensor.
Proximity/Button
Scaling Factor
This register controls the sensitivity of proximity/touch detection. The smaller the value is,
the more sensitivity the sensor gets. The range is from 0 to 15.
Reading Gain
This register controls the low pass filter gain for sensor reading. The range is from 0 to 3.
Baseline Gain
This register controls the low pass filter gain for sensor baseline. The range is from 0 to 3.
Reading Rate
This register value represents how many scan cycles before baseline update. The range is
from 1 to 255.
Negative Delta Count
This register value determines how many consecutive negative signal deviation samples
will trigger the baseline recalibration. The range is from 1 to 255.
Debounce
This register value determines how many consecutive signal deviation samples across the
threshold will trigger the proximity/button touch event. The range is from 1 to 255.
2015 Microchip Technology Inc.
DS40001818A-page 19
LOW-COST mTouch® EVALUATION KIT
USER’S GUIDE
Chapter 3. Work with mTouch® Dawn GUI
The mTouch Dawn GUI can be installed on a Windows-based computer with a USB
port, in order to further evaluate the performance and features of the PIC16LF1559
touch solution. The MCP2221 board works as the I2C host, polling data from the
PIC16LF1559 evaluation board at a fixed time interval, communicating then with the
Dawn GUI through USB communication.
3.1
DAWN GUI INSTALLATION
Download the “Dawn 1.0 setup.zip” file from Microchip website
(http://www.microchip.com/DM160227/). Unzip the file and run Dawn 1.0 setup.exe
program. Figure 3-1 shows the initial installation screen, which displays briefly as the
setup program loads, and follows the GUI installation to finish the setup.
FIGURE 3-1:
DS40001818A-page 20
GUI INSTALLATION
2015 Microchip Technology Inc.
Work with mTouch® Dawn GUI
3.2
GUI OVERVIEW
Before opening the Dawn GUI, connect the evaluation kit to the PC via USB.
When the GUI is launched for the first time, a dialog window will show up to select the
profile for this kit, as shown in Figure 3-2.
FIGURE 3-2:
PROFILE SELECTION
There are two predefined profiles for this kit, which configures the registers that are
displayed in the GUI. The “DM160227_Eval_Kit-Basic” configures the basic and mostly
used registers, while the “DM160227_Eval_Kit_Advanced” displays all the mTouch
registers.
2015 Microchip Technology Inc.
DS40001818A-page 21
Low-Cost mTouch® Evaluation Kit User’s Guide
The Dawn GUI contains five panels: Variable Control Panel, Signal Plotter Panel,
Signal Level Panel, Signal Control Panel and Event Log Panel, as shown in Figure 3-3.
FIGURE 3-3:
DAWN GUI
Variable Control Panel: Display system register value in text box at a fixed fresh rate,
and also allow updating writable register values.
Signal Control Panel: Configure the register values that are displayed in Signal Plotter
and Signal Level Panels.
Signal Plotter Panel: Display the register values configured in Signal Control Panel in
the plot diagram fashion.
Signal Level Panel: Display the register values configured in Signal Control Panel in
the bar diagram fashion.
Event Log Panel: Display the board, signals, and variables information.
More details on the GUI can be found in the mTouch Dawn GUI User’s Guide.
DS40001818A-page 22
2015 Microchip Technology Inc.
Work with mTouch® Dawn GUI
NOTES:
2015 Microchip Technology Inc.
DS40001818A-page 23
DS40001818A-page 24
R18
P2
R14
10k
R2
10k
R7
10k
R6
TX
100R
R15
1
J3
DNP
GND
VDD
SDA
PGD
PGC
P1
1
13
12
11
10
19
18
17
4
3
2
RC2
RC3
RC7
RC5
RA1
RA0
PIC16LF1559-E/SS
VDD
RB4
RB5
RB6
RB7
RA0/ICSPDAT
RA1/ICSPCLK
RA2
RA3/MCLR/VPP
RA4
RA5
U1
R17
GND
20
16
15
14
7
6
5
8
9
Touch output
1
2
3
4
5
6
P4
VSS
RC0
RC1
RC2
RC3
RC4
RC5
RC6
RC7
3.3k
SCL
SDA
3.3k
R16
0603
0603
HDR-2.54 Male 1x6
PICkit TM 3
1
2
3
4
5
6
Touch input
1
2
3
4
5
6
7
P3
0.1uF
C1
PGD
PGC
SDA
CS0
CS1
GUARD
CS2
CS3
CS4
CS5
C2
1uF
GND
VDD
HDR-2.54 Male 1x1
0603
0603
100R
SCL
RX
CS1
0603
CS5
0603
CS4
0603
HDR-2.54 Male 1x6
PICkit TM SA
1
2
3
4
5
6
HDR-2.54 Male 1x1 GND
J2
1
VDD
HDR-2.54 Male 1x1
DNP
J1
1
0603
0R
SDA
SCL
TX
RX
0603
0R
0603
0603
220R
R10
10k
R1
220R
R11
R9
R8
10k
R4
10k
R5
R3
220R
220R
VDD
RC7
CS0
RC5
GUARD
RC3
RC2
CS2
CS3
RED
D0
CS1
PAD4
RED
D1
CS2
RED
D3
CS3
CS0
RED
D2
CS4
R13
220R
PGD
RA0
RED
D5
RED
CS5
R12
220R
PGC
RA1
D4
Rubber Pad Cyl D7.9H5.3Rubber Pad Cyl D7.9H5.3
PAD3
Rubber Pad Cyl D7.9H5.3Rubber Pad Cyl D7.9H5.3
PAD2
FIGURE A-1:
GND
VDD
VDD
PAD1
LOW-COST mTouch® EVALUATION KIT
USER’S GUIDE
Appendix A. Low-Cost mTouch® Evaluation Board
LOW-COST mTouch® EVALUATION BOARD SCHEMATIC
2015 Microchip Technology Inc.
Low-Cost mTouch® Evaluation Board
LOW-COST mTouch® EVALUATION BOARD LAYOUT (1 OF 2)
TM
FIGURE A-2:
®
FIGURE A-3:
LOW-COST mTouch® EVALUATION BOARD LAYOUT (2 OF 2)
2015 Microchip Technology Inc.
DS40001818A-page 25
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DS40001818A-page 26
2015 Microchip Technology Inc.