Texas Instruments 430BOOST-SENSE1 User manual

430BOOST-SENSE1 - Capacitive Touch
BoosterPack for the LaunchPad
User's Guide
Literature Number: SLAU337A
April 2011–Revised September 2011

2SLAU337A–April 2011–Revised September 2011
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Contents
Preface ....................................................................................................................................... 5
1 430BOOST-SENSE1 Overview .............................................................................................. 7
1.1 Overview .................................................................................................................. 7
1.2 Kit Contents .............................................................................................................. 8
2 Getting Started With 430BOOST-SENSE1 BoosterPack ........................................................... 9
2.1 Hardware Preparation .................................................................................................. 9
2.2 Software Preparation ................................................................................................... 9
2.3 Capacitive Touch User Experience .................................................................................. 10
3 Capacitive Touch BoosterPack Hardware ............................................................................. 14
3.1 Driving the LEDs ....................................................................................................... 15
3.2 Capacitive Touch Sensors ............................................................................................ 16
4 LaunchPad Capacitive Touch BoosterPack User Experience Firmware .................................... 17
4.1 Import Project in CCS ................................................................................................. 17
4.2 Open Project and Workspace in IAR Embedded Workbench ................................................... 17
4.3 Capacitive Touch Sense Library ..................................................................................... 18
5 LaunchPad Capacitive Touch BoosterPack User Experience Software .................................... 20
5.1 LaunchPad Capacitive Touch BoosterPack User Experience GUI ............................................. 20
5.2 MediaPad ............................................................................................................... 20
5.3 UART Communication Protocol ...................................................................................... 21
6 Frequently Asked Questions (FAQ), Tips, and Tricks ............................................................. 22
7 References ....................................................................................................................... 22
8 Schematics and PCB Layout ............................................................................................... 23
8.1 Schematics ............................................................................................................. 23
8.2 PCB Layout ............................................................................................................. 24
8.3 Bill of Materials (BOM) ................................................................................................ 24
Revision History ......................................................................................................................... 25
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List of Figures
1 Capacitive Sense BoosterPack With LaunchPad....................................................................... 7
2 PC GUI Looking for LaunchPad......................................................................................... 11
3 PC GUI in Sleep Mode ................................................................................................... 11
4 PC GUI in Active Mode................................................................................................... 12
5 MediaPad................................................................................................................... 13
6 Capacitive Sense BoosterPack Hardware ............................................................................. 14
7 Schematic LED Multiplexing ............................................................................................. 15
8 Driving LEDs ............................................................................................................... 15
9 Capacitive Touch Sensor Areas......................................................................................... 16
10 Capacitive Touch BoosterPack Schematic............................................................................. 23
11 Capacitive Touch BoosterPack Layout, Top Layer ................................................................... 24
12 Capacitive Touch BoosterPack Layout, Bottom Layer and Silkscreen............................................. 24
List of Tables
1 BoosterPack Interface .................................................................................................... 14
2 Bill of Materials............................................................................................................. 24
4List of Figures SLAU337A–April 2011–Revised September 2011
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Preface
SLAU337A–April 2011–Revised September 2011
Read This First
If You Need Assistance
If you have any feedback or questions, support for MSP430 devices, the MSP-EXP430G2 LaunchPad,
and the 430BOOST-SENSE1 Capacitive Touch BoosterPack for the LaunchPad is provided by the Texas
Instruments Product Information Center (PIC) and the TI E2E Forum
(https://community.ti.com/forums/12.aspx). Contact information for the PIC can be found on the TI web site
at support.ti.com. Additional device-specific information can be found on the MSP430 web site at
www.ti.com/msp430.
Related Documentation from Texas Instruments
The primary sources of MSP430 information are the device-specific data sheets and user's guides. The
most up-to-date versions of the user's guide documents available at www.ti.com/msp430 Information
specific to the MSP-EXP430G2 LaunchPad Experimenter Board and the different BoosterPacks can be
found at focus.ti.com/docs/toolsw/folders/print/msp-exp430g2.html or the LaunchPad wiki page at
processors.wiki.ti.com/index.php/MSP430_LaunchPad_(MSP-EXP430G2.
User's guides and detailed information on setting up a project for the MSP430 using Code Composer
Studio or IAR Embedded Workbench can be found at the Tools &Software section of the MSP430 landing
page www.ti.com/msp430.
FCC Warning
This equipment is intended for use in a laboratory test environment only. It generates, uses, and can
radiate radio frequency energy and has not been tested for compliance with the limits of computing
devices pursuant to subpart J of part 15 of FCC rules, which are designed to provide reasonable
protection against radio frequency interference. Operation of this equipment in other environments may
cause interference with radio communications, in which case, the user will be required to take whatever
measures may be required to correct this interference his own expense.
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6Read This First SLAU337A–April 2011–Revised September 2011
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User's Guide
SLAU337A–April 2011–Revised September 2011
430BOOST-SENSE1 - Capacitive Touch BoosterPack for
the LaunchPad
1 430BOOST-SENSE1 Overview
1.1 Overview
The 430BOOST-SENSE1 Capacitive Touch BoosterPack is the first extension module for the
MSP-EXP430G2 MSP430 LaunchPad Value Line Development Kit (see Figure 1). Extension modules
such as this one, designed specifically for the LaunchPad, are called BoosterPacks, and each features an
application example for one of the MSP430 Value Line devices. The BoosterPacks can be connected to
the MSP-EXP430G2 with both 10-pin male headers (included in MSP-EXP430G2 kit) soldered onto the
board and, therefore, use all available pins on the MSP430G2452 Value Line device.
Figure 1. Capacitive Sense BoosterPack With LaunchPad
The Capacitive Sense BoosterPack is available for purchase from the TI eStore:
https://estore.ti.com/430BOOST-SENSE1-Capacitive-Touch-BoosterPack-P2361C42.aspx.
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430BOOST-SENSE1 Overview www.ti.com
The Capacitive Sense BoosterPack features the new MSP430G2xx2 devices, which are capable of driving
up to 16 touch-sense enabled I/O pins. The included MSP430G2452 device allows for low-cost
capacitive-sensing and approximation-sensing applications without the use of any external components.
The BoosterPack includes a capacitive sense board and an MSP420G2452 device preprogrammed with a
demo application. The user experience application demonstrates capacitive sense as standalone feature
by showing the user interaction directly with the onboard LEDs, by a GUI, or by an application example on
a Microsoft Windows PC.
430BOOST-SENSE1 features:
•Nine LEDs giving instant feedback to user interaction
•Six touch-sense areas (a button, a 4-element wheel, and a proximity sensor)
•One preprogrammed MSP430G2452 device
For latest information on the LaunchPad, other available BoosterPacks, software examples, and how to
program the included MSP430G2452 device, see the MSP-EXP430G2 LaunchPad Experimenter Board
User’s Guide (SLAU318) or the LaunchPad wiki page
processors.wiki.ti.com/index.php/MSP430_LaunchPad_(MSP-EXP430G2).
1.2 Kit Contents
The 430BOOST-SENSE1 kit includes two components:
•One Capacitive Touch BoosterPack board with nine LEDs and six sensor areas
•One preprogrammed MSP430G2452 device
This device is a low-power 16-bit microcontroller with an 8-channel 10-bit ADC, comparator, universal
serial interface that supports SPI and I2C, 8kB flash memory, and 256B RAM memory
8430BOOST-SENSE1 - Capacitive Touch BoosterPack for the LaunchPad SLAU337A–April 2011–Revised September 2011
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www.ti.com Getting Started With 430BOOST-SENSE1 BoosterPack
2 Getting Started With 430BOOST-SENSE1 BoosterPack
The following sections describe the preparation necessary to run the user experience application demo
and to start developing applications with the MSP430G2452 for the Capacitive Touch BoosterPack.
2.1 Hardware Preparation
To prepare the Capacitive Touch BoosterPack hardware for its first use:
1. Solder both 10-pin male headers onto the LaunchPad's breakout pin connections J1 and J2. These
two 10-pin male headers and two 10-pin female headers come with the original LaunchPad kit.
NOTE: If the 10-pin female headers are populated, use the 10-pin male headers as adapter to
further extend the connections to the LaunchPad. The additional distance adds minimal base
capacitance and does not affect the user experience of the kit.
2. Remove the J5 connections on the LaunchPad to disconnect the LaunchPad LEDs and keep them
from interfering with P1.0 and P1.6 functions of the Capacitive Sense BoosterPack.
3. Ensure jumpers VCC, TXD, and RXD of the J3 connection are populated for the user experience demo
to operate properly.
NOTE: The jumpers RST and TEST must also be populated when programming the device. They
are not required for normal application operation.
4. Replace the existing MSP430 device in the LaunchPad MCU socket with the MSP430G2452 device
that comes with the Capacitive Sense BoosterPack kit.
NOTE: Some revision 1.4 LaunchPad kits need a firmware update to support the MSP430G2452
devices; see FAQ #1 in Section 6.
5. Connect the Capacitive Sense BoosterPack board to the LaunchPad with proper orientation by
ensuring that the Texas Instruments logo and the text on the BoosterPack are in the same direction as
the text and logo on the Launchpad.
6. Connect the LaunchPad with an USB cable to a PC or connect an external power supply (2.7 V to
3.6 V) to J6. The user experience demo application lights the center LED when power is supplied to
the board.
NOTE: The 32-kHz crystal/oscillator on pins 18 and 19 is not required for the user experience
application to run.
2.2 Software Preparation
The steps described in the following sections are not required for a LaunchPad Capacitive Touch
BoosterPack stand-alone demo. For all other purposes that require PC software interaction, proper
installation of the hardware driver and the software is required. To develop applications, its also necessary
to install one of the IDEs shown on the Tools and Software section of the MSP430 landing page
www.ti.com/msp430. More information on how to start developing applications for the LaunchPad and how
to install the drivers and IDEs that it requires can be found on the LaunchPad wiki page
http://processors.wiki.ti.com/index.php/MSP430_LaunchPad_(MSP-EXP430G2).
All LaunchPad Capacitive Touch BoosterPack User Experience firmware and software described in the
following sections are provided in both binary/executable and source code forms, along with drivers
and supporting documentation. [10] A zip file containing these items can be downloaded from
www.ti.com/lit/zip/slac490.
The same software package link and updates can also be found on the LaunchPad wiki page
http://processors.wiki.ti.com/index.php/MSP430_LaunchPad_(MSP-EXP430G2). When this package is
installed, all user experience application demos are stored in the Software folder in the selected
installation directory, and the source code for the projects can be found in the Source folder.
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2.2.1 LaunchPad USB Driver
For the PC to communicate with the LaunchPad hardware, the LaunchPad USB driver must be installed. If
this is the first time the LaunchPad is connected to the PC, install the USB serial COM port driver located
at [INSTALL_PATH]\LaunchPad_Driver\LaunchPad_Driver.exe.
NOTE: The LaunchPad USB drivers are integrated into the IDE installer packages from Code
Composer Studio (version 4+) or IAR Embedded Workbench (version 5.20+) and do not
require a second installation if an IDE has already been installed.
2.2.2 Locate Software Programs
Two software programs are provided to work with the LaunchPad Capacitive Touch BoosterPack user
experience demo. They are both installed to the [INSTALL_PATH]\Software folder. All software and
firmware examples are also available as source code in the capacitive touch software package.
2.3 Capacitive Touch User Experience
The Capacitive Touch User Experience consists of three projects:
•The firmware application that can operate in stand-alone mode (LaunchPad Capacitive Touch
BoosterPack Firmware Demo)
•A processing GUI that displays the information from the LaunchPad Capacitive Touch BoosterPack
visually (LaunchPad Capacitive Touch BoosterPack GUI Demo)
•A Visual Studio program that uses the LaunchPad Capacitive Touch BoosterPack input to control
media in Windows (MediaPad).
2.3.1 LaunchPad Capacitive Touch BoosterPack Firmware Demo
The application described in this section can be used as either a stand-alone demo (no PC required) or as
a demo with PC applications running. If PC application is desired, make sure to start the PC application
execution before proceeding with step 2.
1. Plug the LaunchPad with Capacitive Touch BoosterPack into a USB source (such as USB port on PC,
USB hub, or USB battery pack) via the mini-USB connector or to a battery pack via the power pin
connector J6. The User Experience application starts up and remains in sleep mode, with only the
center LED on.
2. Slowly wave your hand or finger approximately 3 to 5 cm above the BoosterPack to trigger the
proximity sensor and to wake the device. During the wake-up period, the LEDs surrounding the wheel
light in a wake-up sequence, starting with a slow clockwise rotation and ending with a fast
counter-clockwise rotation. As this sequence ends, the device enters active mode.
3. To perform a touch, firmly press any position on the wheel or the center button. Make sure to keep
your finger between the circles of the wheel.
•Upon releasing a touch on the center button, the center LED toggles.
•Touching a wheel position lights up the corresponding LEDs.
4. To perform a gesture, slide your finger along the wheel without releasing it from the wheel. The
corresponding LEDs trace and follow the touch and gesture.
5. After a short time of no capacitive touch activity, the board returns to sleep mode. Only the center LED
stays on.
6. Go back to step 2 to re-enable the application active mode.
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