Texas Instruments 430BOOST-SENSE1 Manuale utente

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

SLAU337A–April 2011–Revised September 2011 Table of Contents

www.ti.com

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.

SLAU337A–April 2011–Revised September 2011 Preface

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.

SLAU337A–April 2011–Revised September 2011 430BOOST-SENSE1 - Capacitive Touch BoosterPack for the LaunchPad

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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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.

SLAU337A–April 2011–Revised September 2011 430BOOST-SENSE1 - Capacitive Touch BoosterPack for the LaunchPad

Getting Started With 430BOOST-SENSE1 BoosterPack

www.ti.com

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.

10 430BOOST-SENSE1 - Capacitive Touch BoosterPack for the LaunchPad SLAU337A–April 2011–Revised September 2011

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