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MSP-EXP430G2LaunchPad Evaluation Kit User's Guide

Literature Number:SLAU318E

July2010–Revised March2014

Contents 1MSP-EXP430G2LaunchPad Overview (4)

1.1Overview (4)

1.2Features (5)

1.3Kit Contents (5)

1.4Revisions (6)

2Installation (6)

2.1Download the Required Software (6)

2.2Install the Software (6)

2.3Install the Hardware (6)

3Getting Started With MSP-EXP430G2LaunchPad (7)

3.1Getting Started (7)

3.2Demo Application,Internal Temperature Measurement (7)

4Develop an Application With the MSP-EXP430G2LaunchPad (8)

4.1Developing an Application (8)

4.2Program and Debug the Temperature Measurement Demo Application (8)

4.3Disconnect Emulator From Target With Jumper J3 (9)

4.4Program Connected eZ430Target Boards (10)

4.5Connecting a Crystal Oscillator (10)

4.6Connecting a BoosterPack (11)

4.7Supported Devices (11)

4.8MSP-EXP430G2On-Board Emulator (13)

5MSP-EXP430G2Hardware (13)

5.1Device Pinout (13)

5.2Schematics (14)

5.3PCB Layout (20)

5.4Bill of Materials(BOM) (23)

6Suggested Reading (24)

7Frequently Asked Questions(FAQ) (24)

Revision History (26)

2Table of Contents SLAU318E–July2010–Revised March2014

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List of Figures

1MSP-EXP430G2LaunchPad Overview (5)

2Insert Device Into Target Socket (8)

3Code Composer Studio?v4in Debugging Mode (9)

4MSP-EXP430G2LaunchPad With Attached eZ430-RF2500Target Board (10)

5Device Pinout (13)

6Schematics,MSP-EXP430G2Emulator(1of2),Revision1.4 (14)

7Schematics,MSP-EXP430G2Emulator(2of2),Revision1.4 (15)

8Schematics,MSP-EXP430G2Target Socket,Revision1.4 (16)

9Schematics,MSP-EXP430G2Emulator(1of2),Revision1.5 (17)

10Schematics,MSP-EXP430G2Emulator(2of2),Revision1.5 (18)

11Schematics,MSP-EXP430G2Target Socket,Revision1.5 (19)

12Layout,LaunchPad Top Layer (20)

13Layout,LaunchPad Bottom Layer (21)

14Layout,LaunchPad Silkscreen (22)

List of Tables

1Jumper Connection J3Between Emulator and Target (9)

2eZ430Debugging Interface (10)

3Supported Devices (11)

4Features Supported by On-Board Emulator (13)

5Bill of Materials (23)

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User's Guide

SLAU318E–July2010–Revised March2014 MSP-EXP430G2LaunchPad Evaluation Kit

Preface:Read This First

If You Need Assistance

If you have any feedback or questions,support for the MSP430?devices and the MSP-EXP430G2is

provided by the Texas Instruments Product Information Center(PIC)and the TI E2E Forum

(https://www.wendangku.net/doc/1817588453.html,/).Contact information for the PIC can be found on the TI web site at https://www.wendangku.net/doc/1817588453.html,.

Additional device-specific information can be found on the MSP430web site at https://www.wendangku.net/doc/1817588453.html,/msp430. Related Documentation from Texas Instruments

The primary sources of MSP430information are the device-specific data sheets and user's guides

available at the Texas Instruments MSP430web site:https://www.wendangku.net/doc/1817588453.html,/msp430.

MSP430device user's guides,application reports,software examples and other MSP430user's guides can be found at the Tech Docs section.The CCS user's guide includes detailed information on setting up

a project and using Code Composer Studio?for the MSP430microcontroller(SLAU157).

Information specific to the MSP-EXP430G2LaunchPad Evaluation Kit,all the available IDEs,Software Libraries,and examples can be found at the Tools&Software section:https://www.wendangku.net/doc/1817588453.html,/tool/msp-

exp430g2.

1MSP-EXP430G2LaunchPad Overview

1.1Overview

The MSP-EXP430G2LaunchPad is an inexpensive and simple evaluation kit for the MSP430G2xx Value Line series of microcontrollers.It is an easy way to start developing on the MSP430with on-board

emulation for programming and debugging as well as buttons and LEDs for a simple user interface.

Rapid prototyping is simplified by the20-pin BoosterPack headers which support a wide range of available BoosterPack plug-in modules.You can quickly add features like wireless connectivity,graphical displays, environmental sensing,and much more.You can either design your own BoosterPack or choose among many already available from TI and third party developers.

The LaunchPad features an integrated DIP target socket that supports up to20pins,allowing MSP430?Value Line devices to be plugged into the LaunchPad board.The MSP-EXP430G2LaunchPad comes

with an MSP430G2553device by default.The MSP430G2553has the most memory available of the

compatible Value Line devices.

The MSP430G255316-bit MCU has16KB flash,512bytes RAM,up to16-MHz CPU speed,10-bit ADC, capacitive touch enabled I/Os,universal serial communication interface,and more–plenty to get you

started in your development.

Free software development tools are also available:TI's Eclipse-based Code Composer Studio?IDE

(CCS),IAR Embedded Workbench?IDE(IAR),and the community-driven Energia open source code

editor.More information about the LaunchPad,including documentation and design files,can be found on the tool page at https://www.wendangku.net/doc/1817588453.html,/tool/msp-exp430g2.

MSP430,Code Composer Studio are trademarks of Texas Instruments.

IAR Embedded Workbench is a trademark of IAR Systems.

All other trademarks are the property of their respective owners.

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MSP-EXP430G2LaunchPad features:

?USB debugging and programming interface featuring a driverless installation and application UART serial communication with up to9600Baud

?Supports MSP430G2xx2,MSP430G2xx3,and MSP430F20xx devices in PDIP14or PDIP20packages (see Section4.7for a complete list of supported devices)

?Two general-purpose digital I/O pins connected to green and red LEDs for visual feedback

?Two push button for user feedback and device reset

?Easily accessible device pins for debugging purposes or as socket for adding customized extension boards

?High-quality20-pin DIP socket for an easy plug-in or removal of the target device

Figure1.MSP-EXP430G2LaunchPad Overview

1.3Kit Contents

The MSP-EXP430G2evaluation kit includes the following hardware:

?LaunchPad emulator socket board(MSP-EXP430G2)

?Mini USB-B cable,0.5m

?Two MSP430flash devices

–MSP430G2553:Low-power16-bit MSP430microcontroller with an8-channel10-bit ADC,on-chip comparator,touch-sense enabled I/Os,universal serial communication interface,16kB flash

memory,and512bytes of RAM(preloaded with a sample program)

–MSP430G2452:Low-power16-bit MSP430microcontroller with an8-channel10-bit ADC,on-chip comparator,touch-sense enabled I/Os,universal serial interface,8kB flash memory,and256bytes

of SRAM

?Two10-pin PCB connectors female

?32.768-kHz clock crystal from Micro Crystal(https://www.wendangku.net/doc/1817588453.html,)

?Quick start guide

?Two LaunchPad stickers

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Installation https://www.wendangku.net/doc/1817588453.html, 1.4Revisions

The first production revision of the LaunchPad in2010was1.3.In2012the LaunchPad board revision changed from1.4to1.5to align with the new release of Value Line devices.The differences in the

schematic and the kit contents are:

?Layout and Schematic:

–Voltage feedback in the emulator changed to increase startup stability(Rev1.3to Rev1.4)

–Rearranged jumper J3to support two UART configurations:vertical(SW UART),horizontal(HW UART)

–VCC on the connector J4can now be disconnected from the emulator VCC by J3

–Pullup resistor R34and capacitor C24on P1.3removed to reduce the current consumption

–Presoldered male headers J1and J2

2Installation

The MSP-EXP430G2LaunchPad installation consists of three easy steps:

1.Download the required software.

2.Install the selected IDE.

3.Connect the LaunchPad to the PC.

Then the LaunchPad is ready to develop applications or to use the pre-programmed demo application.

2.1Download the Required Software

Different development software tools are available for the MSP-EXP430G2LaunchPad development

board.IAR Embedded Workbench?KickStart IDE and Code Composer Studio?(CCS)IDE are both

available in a free limited version.IAR Embedded Workbench allows4KB of C-code https://www.wendangku.net/doc/1817588453.html,S is limited to a code size of16KB.The software is available at https://www.wendangku.net/doc/1817588453.html,/mspds.There are many

other compilers and integrated development environments(IDEs)available to use with the MSP-EXP430 LaunchPad including Rowley Crossworks and MSPGCC.However,example projects have been created using IAR Embedded Workbench KickStart IDE and Code Composer Studio IDE(CCS).For more

information on the supported software and the latest code examples,visit the LaunchPad tool page

(https://www.wendangku.net/doc/1817588453.html,/tool/msp-exp430g2).

2.2Install the Software

Download one of the integrated development environments(IDEs)(see Section2.1).IAR KickStart and CCS offer the required driver support to work with the MSP-EXP430LaunchPad onboard emulation.Once installed,the IDE should find the MSP-EXP430G2LaunchPad as USB:HID debugging interface.Now all is set for developing MSP430G2xx based application on the LaunchPad.

2.3Install the Hardware

Connect the MSP-EXP430G2LaunchPad socket board with the enclosed USB cable to a PC.The driver installation starts automatically.If prompted for software,allow Windows to install the software

automatically.This is possible only if either IAR KickStart or CCS is already installed.

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https://www.wendangku.net/doc/1817588453.html, Getting Started With MSP-EXP430G2LaunchPad 3Getting Started With MSP-EXP430G2LaunchPad

3.1Getting Started

The first time the MSP-EXP430G2LaunchPad Evaluation Kit is used,a demo application automatically starts as soon as the board is powered from the USB host.To start the demo,connect the MSP-

EXP430G2LaunchPad with the included mini USB cable to a free USB port.The demo application starts with an LED toggle to show the device is active.More information about the demo application can be

found in Section3.2.

3.2Demo Application,Internal Temperature Measurement

The LaunchPad includes a pre-programmed MSP430G2553device already installed in the target socket.

When LaunchPad is connected via USB,the demo starts with an LED toggle sequence.The onboard

emulation generates the supply voltage and all the signals necessary to start.

Press button P1.3to switch the application to a temperature measurement mode.A reference temperature is taken at the beginning of this mode,and the LEDs of the LaunchPad signal a rise or fall in temperature by varying the brightness of the on-board red or green LED,respectively.The reference temperature can also be recalibrated with another button press on P1.3.The collected temperature data is also

communicated via back-channel UART through the USB emulation circuitry back to the PC.The internal temperature sensor data from the MSP430G2553device is sent to the PC to be displayed on the GUI.

The pre-loaded demo application and the GUI are found in the Software Examples zip folder.The GUI is opened with LaunchPad_Temp_GUI.exe.This GUI is made with Processing(https://www.wendangku.net/doc/1817588453.html,)with the source available for customization.The serial communication port on the PC must be configured with 2400bps,one stop bit,and no flow control to display the values correctly.

The demo application uses the on-chip peripherals of the MSP430G2553device such as the10-bit ADC, which samples the internal temperature sensor,and16-bit timers,which drive the PWM to vary brightness of the LEDs and enable software UART for communication with the PC.The MSP430G2553offers a USCI interface that is capable of communicating through UART at up to2MBaud,but to be aligned with all the other MSP430G2xx devices,the demo uses the Timer UART implementation,which can be used on all the other devices.This way the demo can be used with any other MSP430G2xx device with an integrated ADC,without any change in the program.

The provided applications can be a great starting point for various custom applications and give a good overview of the various applications of the MSP430G2xx Value Line devices.

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4Develop an Application With the MSP-EXP430G2LaunchPad

4.1Developing an Application

The integrated development environments(IDEs)shown in Section2offer support for the whole

MSP430G2xx Value Line.The MSP-EXP430G2LaunchPad needs only a connection to the USB of the Host PC—there is no external hardware required.The power supply and the Spy-Bi-Wire JTAG signals TEST and RST must be connected with jumper J3to allow the onboard emulation connection to the

device.Now the preferred device can be plugged into the DIP target socket of the LaunchPad(see

Figure2).Both PDIP14and PDIP20devices of the MSP430G2xx Value Line and the MSP430F20xx

family can be inserted into the DIP socket aligned to pin1.A complete list of supported devices can be found in Section4.7.

Figure2.Insert Device Into Target Socket

The following example for Code Composer Studio shows how to download and debug the demo

application described in Section3.2.

4.2Program and Debug the Temperature Measurement Demo Application

The source code of the demo application can be found in the Software Examples zip folder.Download the project folder and unpack it to a location of your choice.For this demo,Code Composer Studio v4or

newer must be installed.

The demo application can be loaded to the CCS workspace by clicking File→Import.Select the location of the extracted project files and import Existing projects into Workspace.Now the MSP-EXP430G2-

Launchpad project appears inside the CCS workspace.The project must be marked as the active project to start programming and debugging the device.

Connect the LaunchPad with an inserted MSP430G2553device to the host PC and click the Debug button on the CCS Toolbar.The MSP-EXP430G2LaunchPad is initialized and the download of the compiled

demo application starts.The CCS view switches to a debugging interface once the download is completed and the application is ready to start.Figure3shows Code Composer Studio v4with the MSP-EXP430G2 LaunchPad demo application in debug view.

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Figure3.Code Composer Studio?v4in Debugging Mode

4.3Disconnect Emulator From Target With Jumper J3

The connection between the MSP-EXP430G2emulator and the attached target device can be opened with the jumper array J3.This can be useful to access an attached eZ430target board by disconnecting the Spi-Bi-Wire JTAG lines RST and TEST or if the JTAG lines are used for other application purposes.

The jumper array can also be used to measure the power consumption of the LaunchPad application.For this intention,all connections except VCC must be opened,and a multi meter can used on the VCC

Jumper to measure the current of the MSP-EXP430G2target device and its peripherals.The jumper J5 VCC also must be opened if the LaunchPad board is powered with an external power supply over J6

Table1or the eZ430interface J4.

NOTE:The assignment of jumper J3has been changed in MSP-EXP430G2revision1.5,see the

comments in Table1to find the assignment for a specific board revision.

Table1.Jumper Connection J3Between Emulator and Target

Jumper Signal Description

1VCC Target socket power supply voltage(power consumption test jumper)(located on5before Rev.1.5)

Test mode for JTAG pins or Spy-Bi-Wire test clock input during programming and test(located on1before 2TEST

Rev.1.5)

3RST Reset or Spy-Bi-Wire test data input/output during programming and test(located on2before Rev.1.5)

4RXD UART receive data input(direction can be selected by jumper orientation)(located on3before Rev.1.5)

5TXD UART transmit data output(direction can be selected by jumper orientation)(located on4before Rev.1.5)

Jumpers4and5connect the UART interface of the emulator to the target device pins P1.1and P1.2.The direction of the UART signal lines can be selected by the orientation of the attached jumpers.In horizontal orientation,the jumpers connect TXD to P1.1and RXD to P1.2,as they are used for the software UART communication on the demo application(see Section3.2).In vertical orientation,the jumpers connect the TXD signal to P1.2and the RXD signal to P1.1,as required for the MSP430G2553USCI.

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4.4Program Connected eZ430Target Boards

The MSP-EXP430G2LaunchPad can program the eZ430-RF2500T target boards,the eZ430-Chronos watch module,or the eZ430-F2012T/F2013T.To connect one of the ez430targets,connector J4must be populated with a0.050-in(1.27-mm)pitch male header,as shown in Figure4.

Figure4.MSP-EXP430G2LaunchPad With Attached eZ430-RF2500Target Board To program the attached target without interfering with the LaunchPad socket board,jumper connections TEST and RST of J3must be open.The interface to the eZ430target board is always connected to the MSP-EXP430G2emulator,so the programming and debugging of a connected LaunchPad target device is possible only if the eZ430target is not connected on the same time.The application UART,on the other hand,is connected directly to the LaunchPad target device,and jumper J3can be closed to monitor the transmission from the LaunchPad target to the attached eZ430.This way both possible connections,from the device to the PC and from the device to the eZ430,can be established without changing the direction of the UART pins.

The VCC connection to the eZ430interface is directly connected to the LaunchPad target VCC and can be separated with jumper J3,if the LaunchPad itself should be powered via a connected battery on J4.To supply the eZ430interface with the onboard emulator the jumper J3VCC needs to be closed.

Table2shows the pinout of the eZ430debugging interface J4,the first pin is the left pin located on the emulator part of the LaunchPad.

Table2.eZ430Debugging Interface

Pin Signal Description

1TXD UART transmit data output(UART communication from PC or MSP430G2xx to eZ430target board)

2VCC Power supply voltage(J3VCC needs to be closed to supply via onboard emulator)

3TEST/SBWTCK Test mode for JTAG pins and Spy-Bi-Wire test clock input during programming and test

4RST/SBWTDIO Reset,Spy-Bi-Wire test data input/output during programming and test

5GND Power supply ground

6RXD UART receive data input(UART communication from eZ430target board to PC or MSP430G2xx)

4.5Connecting a Crystal Oscillator

The MSP-EXP430G2LaunchPad offers a footprint for a variety of crystal oscillators.The XIN and XOUT signals of the LFXT1oscillator can support low-frequency oscillators like a watch crystals of32768Hz or a standard crystal with a range defined in the associated data sheet.The signal lines XIN and XOUT can also be used as multipurpose I/Os or as a digital frequency input.More information on the possibilities of the low-frequency oscillator and the possible crystal selection can be found in the MSP430x2xx Family User's Guide(SLAU144)or the device-specific data sheet.

The oscillator signals are connected to J2to use the signals on an attached application board.In case of signal distortion of the oscillator signals that leads to a fault indication at the basic clock module,resistors R29and R28can be used to disconnect the pin header J2from the oscillating lines.

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4.6Connecting a BoosterPack

The LaunchPad can connect to many BoosterPacks within the ecosystem.The BoosterPack headers J1 and J2along with power supply J6fall on a100-mil(0.1-in)grid to allow for easy and inexpensive

development with a breadboard.The LaunchPad adheres to the20-pin LaunchPad pinout standard.A

standard was created to aid compatibility between LaunchPads and BoosterPacks,across the TI

ecosystem.

The20-pin standard is backward compatible with the40-pin standard used by LaunchPads like the MSP-EXP430F5529LP.This allows a subset of some40-pin BoosterPacks to be used with20-pin LaunchPads.

While most BoosterPacks are compliant with the standard,some are not.The LaunchPad is compatible with all20-pin(and40-pin)BoosterPacks that are compliant with the standard.If the reseller or owner of the BoosterPack does not explicitly indicate compatibility with the MSP430G2LaunchPad,you might want to compare the schematic of the candidate BoosterPack with the LaunchPad,to ensure compatibility.

Keep in mind that sometimes conflicts can be resolved by changing the G2device pin function

configuration in software.More information about compatibility can also be found at

https://www.wendangku.net/doc/1817588453.html,/launchpad.

4.7Supported Devices

Texas Instruments offers several MSP430devices in a PDIP package that is compatible with LaunchPad.

Table3shows the supported devices.

Table3.Supported Devices

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Table3.Supported Devices(continued)

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https://www.wendangku.net/doc/1817588453.html, MSP-EXP430G2Hardware 4.8MSP-EXP430G2On-Board Emulator

The MSP-EXP430G2on-board emulator enables programming and debugging of supported MSP430

devices(see Section4.7).It offers several features that are enabled by a2-wire JTAG interface called

Spy-Bi-Wire.For a more feature-complete emulator,the MSP-FET430UIF flash emulation tool may be

more appropriate.See Table4for more details on the MSP-EXP430G2LaunchPad on-board emulator.

Table4.Features Supported by On-Board Emulator

Support by LaunchPad

Feature

(MSP-EXP430G2) Supports MSP430F20xx,F21x2,F22xx,G2x01,G2x11,G2x21,G2x31,G2x53?

Allows fuse blow

Adjustable target supply voltage

Fixed2.8-V target supply voltage

Fixed3.6-V target supply voltage?

4-wire JTAG

2-wire JTAG?

Application UART?

Supported by CCS?

Supported by IAR?

5MSP-EXP430G2Hardware

5.1Device Pinout

Figure5.Device Pinout

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Figure6.Schematics,MSP-EXP430G2Emulator(1of2),Revision1.4

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Figure7.Schematics,MSP-EXP430G2Emulator(2of2),Revision1.4

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Figure8.Schematics,MSP-EXP430G2Target Socket,Revision1.4

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Figure9.Schematics,MSP-EXP430G2Emulator(1of2),Revision1.5

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Figure10.Schematics,MSP-EXP430G2Emulator(2of2),Revision1.5

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Figure11.Schematics,MSP-EXP430G2Target Socket,Revision1.5

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MSP-EXP430G2Hardware https://www.wendangku.net/doc/1817588453.html, 5.3PCB Layout

https://www.wendangku.net/doc/1817588453.html,yout,LaunchPad Top Layer

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