Texas Instruments Stellaris EK-LM3S9B92 User manual

EK-LM3S9B92-04 Copyright © 2009–2010 Texas Instruments
User’s Manual
Stellaris® EK-LM3S9B92 Evaluation Kit
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Copyright
Copyright © 2009–2010 Texas Instruments, Inc. All rights reserved. Stellaris and StellarisWare are registered trademarks of Texas Instruments.
ARM and Thumb are registered trademarks, and Cortex is a trademark of ARM Limited. Other names and brands may be claimed as the property
of others.
Texas Instruments
108 Wild Basin, Suite 350
Austin, TX 78746
http://www.ti.com/stellaris
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Table of Contents
Chapter 1: Stellaris® LM3S9B92 Evaluation Kit Overview ...........................................................................9
Kit Contents......................................................................................................................................................10
Using the EK-LM3S9B92..................................................................................................................................10
Features............................................................................................................................................................10
Chapter 2: Hardware Description..................................................................................................................13
Evaluation Board ..............................................................................................................................................13
Functional Description ..................................................................................................................................13
In-Circuit Debug Interface Board ......................................................................................................................16
Functional Description ..................................................................................................................................16
Chapter 3: Software Development ................................................................................................................19
Software Description.........................................................................................................................................19
Source Code.....................................................................................................................................................19
Tool Options .....................................................................................................................................................19
Programming the EK-LM3S9B92 Board...........................................................................................................19
Appendix A: Schematics................................................................................................................................21
Appendix B: Connection Details...................................................................................................................27
Component Locations.......................................................................................................................................27
Board Dimensions ............................................................................................................................................28
Board Connectivity............................................................................................................................................29
References .......................................................................................................................................................29
Appendix C: Microcontroller GPIO Assignments........................................................................................31
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List of Figures
Figure 1-1. LM3S9B92 Evaluation Board..........................................................................................................9
Figure 1-2. In-Circuit Debug Interface Board.....................................................................................................9
Figure 2-1. EK-LM3S9B92 Evaluation Board Block Diagram..........................................................................13
Figure 2-2. GPIO Pads....................................................................................................................................14
Figure 2-3. JTAG/SWD Connector..................................................................................................................14
Figure 2-4. PWR/UART Connector..................................................................................................................15
Figure 2-5. In Circuit Debug (ICDI) Board Block Diagram...............................................................................16
Figure 2-6. JTAG/SWD Connector J1 .............................................................................................................17
Figure 2-7. JTAG/SWD Connector J3 .............................................................................................................17
Figure 2-8. PWR/UART Connector..................................................................................................................17
Figure B-1. EK-LM3S9B92 Evaluation Board Component Locations ..............................................................27
Figure B-2. BD-ICDI Board Component Locations ..........................................................................................27
Figure B-3. EK-LM3S9B92 Evaluation Board Dimensions ..............................................................................28
Figure B-4. In-Circuit Debug Interface Board Dimensions...............................................................................28
Figure B-5. ICDI – EK-LM3S9B92 Board Connectivity....................................................................................29
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List of Tables
Table C-1. EK-LM3S9B92 Evaluation Board GPIO Usage.............................................................................31
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Stellaris® LM3S9B92 Evaluation Kit Overview
Luminary Micro's Stellaris® LM3S9B92 Evaluation Board Kit (EK-LM3S9B92) is a low-cost
platform for evaluation of the LM3S9B92 microcontroller. The kit includes two boards, the
EK-LM3S9B92 evaluation board, and the In-Circuit Debug Interface (BD-ICDI) board.
The EK-LM3S9B92 board includes the LM3S9B92 ARM® Cortex™-M3 Microcontroller, a 10/100
Mbit Ethernet port, a full-speed USB-OTG port, connectors for inteface to the BD-ICDI board, and
oversized pads for easy connection to the microcontroller GPIO ports.
The BD-ICDI board is a USB full-speed JTAG/SWD debugger board. It includes a USB miniB
connector for connection to a USB PC port, and two shrouded header connectors for connection to
the EK-LM3S9B92 board.
Development of software for the EK-LM3S9B92 is simplified by using Luminary Micro's
comprehensive StellarisWare® peripheral driver library and ARM development tools from our tools
partners. The Stellaris® LM3S9B92 Evaluation Board Kit includes the two boards described, a
documentation CD, and cables. All design files are provided on the EK-LM3S9B92 CD.
Figure 1-1. LM3S9B92 Evaluation Board
Figure 1-2. In-Circuit Debug Interface Board
CHAPTER 1
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Stellaris® LM3S9B92 Evaluation Kit Overview
10 January 6, 2010
Kit Contents
The EK-LM3S9B92 evaluation kit comes with the following:
EK-LM3S9B92 evaluation board
In-Circuit Debug Interface (BD-ICDI) board
–Connects to USB port on PC and to 10-pin, fine-pitch ARM JTAG connector on the
EK-LM3S9B92 evaluation board
–Secondary 8-pin Power/UART connector provides power and virtual comm-port capability
to the EK-LM3S9B92 evaluation board.
Cables
–USB miniB to USB-A cable
–USB-OTG to USB-A cable
–10-pin ribbon cable for JTAG/SWD connection
–8-pin ribbon cable for Power/UART connection
CD containing:
–A supported version of one of the following (including a toolchain-specific Quickstart
guide):
• Keil™ RealView® Microcontroller Development Kit (MDK-ARM)
• IAR Embedded Workbench
• Code Sourcery GCC development tools
• Code Red Technologies development tools
• Texas Instruments’ Code Composer Studio™ IDE
–Complete documentation
–Quickstart application source code
–Stellaris® Firmware Development Package with example source code
Using the EK-LM3S9B92
The recommended steps for using the EK-LM3S9B92 evaluation kit are:
1. Follow the Quickstart guide included in the kit. The Quickstart guide will help get the
EK-LM3S9B92 LC Evaluation Board up and running in minutes.
2. Use your preferred ARM tool-chain and the Luminary Micro Peripheral Driver Library to
develop an application. Software applications are loaded using the BD-ICDI board. See
Chapter 3, “Software Development,” for the programming procedure. The StellarisWare
Peripheral Driver Library Software Reference Manual contains specific information on
software structure and function.
3. Customize and integrate the hardware to suit an end application. This user's manual is an
important reference for understanding circuit operation and completing hardware modification.
Features
The EK-LM3S9B92 evaluation kit provides the following features:
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Stellaris® LM3S9B92 Evaluation Kit User’s Manual
January 6, 2010 11
LM3S9B92 high-performance Stellaris microcontroller and large memory
–32-bit ARM® Cortex™-M3 core
–256 KB single-cycle Flash memory, 96 KB single-cycle SRAM, 23.7 KB single-cycle ROM
Ethernet 10/100 port with two LED indicators
USB 2.0 Full-Speed OTG port
Virtual serial communications port capability
Oversized board pads for GPIO access
User pushbutton and LED
Detachable ICDI board can be used for debugging other Luminary Micro boards
Easy to customize
–Includes full source code, example applications, and design files
–Develop using tools supporting FastMATH from Keil, IAR, Code Sourcery, and Code Red
(using a Stellaris evaluation kit or preferred ARM Cortex-M3 debugger)
–Supported by Luminary Micro StellarisWare peripheral driver library
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Stellaris® LM3S9B92 Evaluation Kit Overview
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Hardware Description
The EK-LM3S9B92 evaluation kit contains two boards: the EK-LM3S9B92 evaluation board and
the BD-ICDI JTAG debug board as described in more detail in this chapter.
Evaluation Board
The EK-LM3S9B92 evaluation board uses the Stellaris® LM3S9B92 microcontroller and includes
a 10/100 Ethernet port and a USB 2.0 full-speed OTG port. The board is intended for use with the
ICDI board, but can be used as a standalone board as well. Figure 2-1 shows the block diagram.
Figure 2-1. EK-LM3S9B92 Evaluation Board Block Diagram
Functional Description
Microcontroller, Reset, GPIO Pads, and JTAG (Schematic page 1)
Microcontroller
The evaluation board uses the Stellaris EK-LM3S9B92 microcontroller. A 16 MHz crystal provides
the main oscillator clock which can directly drive the ARM core clock or can drive an internal PLL
to increase the core clock up to 80 MHz. A 25 MHz crystal is used for the Ethernet clock.
The LM3S9B92 microcontroller has an internal LDO voltage regulator that supplies power for
internal use. This rail requires only three capacitors for decoupling and is not connected to any
other circuits.
Stellaris
LM3S9B92
Ethernet10/100
5V
GPIOs
USB – OTG
3.3V
Regulator
USB Power
Switch
JTAG/SWD
PWR/UART
UART0
BOARD PADs
RESET
DPDT
VBUS
25MHz
16MHz
MOSC
Ethernet
USER LED
USER PUSHBUTTON
USB
JTAG
CHAPTER 2
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Hardware Description
14 January 6, 2010
Reset
A reset switch and R-C network connects to the microcontroller’s RSTn input. The reset signal is
also connected to the JTAG/SWD connector J1 to allow reset control from the debugger.
GPIO Pads
Four groups of oversized board pads with a 0.1” spacing provide access to GPIO signals and
standard 0.1” pitch headers can be soldered to these pads. Pads are labeled with the
corresponding GPIO signal, and pads with no labels are unconnected. Note that GPIO signals
required for operation of the Ethernet port, USB port, and JTAG port are reserved for board use
and are not available on these pads. Figure 2-2 shows the pad groups.
Figure 2-2. GPIO Pads
GPIO Jumpers
Some of the GPIO signals used by the board are connected to board jumpers and can be
disconnected to provide additional user GPIOs. GPIOs PA0/PA1/PB4/PD0/PF2/PF3 are
connected to jumpers JR1-JR6 respectively. Each signal can be freed by cutting the trace of the
corresponding jumper (cut at white line on silkscreen). The jumper pads have the same footprint
as an 0603 SMT resistor. To reconnect a previously cut jumper, solder a 0 ohm resistor to the
corresponding jumper footprint.
JTAG/SWD
The JTAG/SWD connector J1 is used for program download and debug. This is a 2x5 fine pitch
(0.050”) ARM JTAG connector, see (Figure 2-3) for signal definition. The LM3S9B92
microcontroller supports JTAG debug, Serial Wire Debug (SWD), and Serial Wire Out (SWO) trace
with this connector. The ICDI board connects via a 10-wire ribbon cable to this connector.
Figure 2-3. JTAG/SWD Connector
GPIO Pads – Top left
SHDN
PD1 PD0 PD2 PD3 PD4 PD5 PD6 PD7
PC5 PC4 PC7 PC6
GPIO Pads – Bottom left
PA4
PA7
PA6
5VR 5V PB2 PB3 PB4 PB5 PB6 PB7
PA1 PA0 PA3 PA2 PA5
GND
GND
GPIO Pads – Top right
PJ4
PJ7
PJ6
VBUS PG7 PH0 PH1 PH2 PH5 PH6 PH7
PJ1 PJ0 PJ3 PJ2 PJ5 PG0
PG1
GPIO Pads – Bottom right
PE4
PE7
PE6
PF1 PF0 PF2PF3PF4PF5
PE1 PE0 PE3 PE2 PE53.3V
GND
TMS/SWDIO
TCK/SWCLK
TDO/SWO
TDI
RSTn GND
GND
GND
3.3V
N/C
1
2
910
In
In
Out
I/O
In Out
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Stellaris® LM3S9B92 Evaluation Kit User’s Manual
January 6, 2010 15
PWR/UART
The PWR/UART connector J2 is used to provide 5 V power from the ICDI board and also to
connect the LM3S9B92 UART0 signals. This is a 2x4 fine pitch (0.050") connector, see
(Figure 2-4) for signal definition. The UART0 signals are connected to GPIO jumpers JR1 and JR2
and can be disconnected from connector J2 if required, see “GPIO Jumpers” on page 14. The
ICDI board connects via an 8-wire ribbon cable to this connector.
Figure 2-4. PWR/UART Connector
Ethernet, USB, Power and Miscellaneous (Schematic page 2)
Page 2 of the schematics contains the Ethernet RJ45 connector, USB power switch and USB OTG
connector, 3.3 V regulator, and power switch selector.
Ethernet Port
The on-board RJ45 connector provides a 10/100 base T Ethernet port. The RJ45 connector
includes integrated LEDs and magnetics. The LEDs are connected to GPIO jumpers JR4 and JR5
and can be disconnected from the RJ45 connector if required, see GPIO Jumpers section.
USB Port
The on-board USB microAB connector provides a USB 2.0 full-speed port. To use as an On-The-
Go (OTG) port, the power selector switch SW3 lever must be set to EXT. This selects an external
5 V power source to provide power to the board and the USB power switch. If the SW3 lever is set
to USB, power to the board is received from USB, the on-board USB power switch output is
disconnected from USB, and the board can only be used as a USB device. When using the
USB-OTG port in Host mode, the current provided to a USB device should be limited to 100 mA or
less when powered from the ICDI board. If powered from the 5 V test pad, then this can be
increased to 500 mA.
Board Power
The board requires 5 V for operation, and switch SW3 is used to select the power source. If the
switch lever is moved towards the USB label on the board, power is received from the USB
connector. If the switch lever is moved towards the EXTernal board label, the board is powered
from the PWR/UART connector and the ICDI board provides power to this connector. DC regulator
U2 generates 3.3 V for powering the board circuits and includes power indicator LED D1.
User Devices
Pushbutton switch SW2 and LED D2 are available for the user and connected to PB4 and PD0
respectively. These GPIOs are connected to GPIO jumpers JR3 and JR4 and can be
disconnected from SW2 and D2 if required, see GPIO Jumpers section.
VCP_TX
VCP_RX GND
GND
N/C
1
2
78
N/C
5V 5V
Out
InIn
In
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Hardware Description
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In-Circuit Debug Interface Board
The ICDI board is used to download and debug programs on the EK-LM3S9B92 evaluation board,
but can also be used for debug of other Luminary Micro boards. A block diagram is shown in
Figure 2-5.
Figure 2-5. In Circuit Debug (ICDI) Board Block Diagram
Functional Description
USB to JTAG/SWD, Power (Schematic page 1)
USB
An FTDI USB to serial protocol chip is used for the USB 2.0 full-speed device controller. This is
connected to a USB miniB connector and to a set of buffers/multiplexers. A 1-kbit serial EEPROM
contains USB configuration data which is read at power up.
Power
The board receives 5 V power from the USB bus. A DC regulator generates 3.3 V for on-board
circuits, when on LED D1 (POWER) is lit on.
Headers
Three headers are on-board, a 10-pin JTAG/SWD header J1, an 8-pin PWR/UART header J2, and
an optional 20-pin JTAG/SWD header J3. The 10-pin and 8-pin headers are used to connect to the
EK-LM3S9B92 evaluation board.
JTAG/SWD
JTAG/SWD connector J1 connects to the EK-LM3S9B92 evaluation board with a ribbon cable for
program download and debug. This is a 2x5 fine pitch (0.050”) ARM JTAG connector, see
(Figure 2-6) for signal definition.The ICDI supports JTAG debug, SWD (Serial Wire Debug), and
SWO (Serial Wire Out) trace with this connector.
Optional JTAG/SWD connector J3 is a 2x10 standard pitch (0.1”) ARM JTAG connector directly
connected to J1, see (Figure 2-7) for signal definition. This allows the ICDI to connect to targets
that use a 2x10 connector. It also allows the use of an external 2x10 debugger on targets with the
FTDI
PortA
3.3V
Regulator
USB
RESET
VBUS 6MHz
OSC
JTAG/SWD
PWR/UART
JTAG/SWD
MUX
EEPROM
PortB
POWER
2x4
2x10
JTAG/SWD
2x5
ACTIVE
DEBUG
USB
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Stellaris® LM3S9B92 Evaluation Kit User’s Manual
January 6, 2010 17
fine pitch connector, including the EK-LM3S9B92. The signal direction shown for J1 and J3 applies
when the ICDI is used as the JTAG/SWD debugger and LED D2 (DEBUG ACTIVE) is lit on. In this
case only one of the two connectors J1/J3 should be used.
The ICDI can also be used as a 20-pin to 10-pin adapter for external JTAG debuggers. Note that
the DEBUG ACTIVE LED must be off before connecting any external JTAG debuggers.
Figure 2-6. JTAG/SWD Connector J1
Figure 2-7. JTAG/SWD Connector J3
Pushbutton
Pushbutton SW1 (RESET) is provided to manually generate the SRSTn signal to the target
device. The SRSTn signal can also be generated under program control.
PWR/UART
The PWR/UART connector J2 connects to the EK-LM3S9B92 evaluation board with a ribbon cable
and provides 5 V power and a virtual communications port connection. This is a 2 x 4 fine pitch
(0.050”) connector, see (Figure 2-8) for signal definition. Signals DBG1/DBG2 are reserved.
Figure 2-8. PWR/UART Connector
TMS/SWDIO
TCK/SWCLK
TDO/SWO
TDI
SRSTn GND
GND
GND
VSENSE
N/C
1
2
910
In
Out
Out
Out
In
I/O
TMS/SWDIO
TCK/SWCLK
TDO/SWO
TDI
SRSTn
12
19
20
GND
GND
GND
GND
GND
GND
GND
GND
GND
N/C
N/C
N/C
N/C
N/C VSENSE In
Out
Out
Out
In
I/O
VCP_TX
VCP_RX GND
GND
DBG1
1
2
78
DBG2
5V 5V
In
Out
Out
Out
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Hardware Description
18 January 6, 2010
JTAG / SWD Multiplexer (Schematic page 2)
Buffers
A set of tri-state buffers is used to multiplex JTAG and SWD signals, and also multiplex the UART
VCP_TX signal with the SWO signal. LED D2 (DEBUG ACTIVE) is lit on when these buffers are
enabled. To avoid signal contention, external JTAG debuggers should not be connected when
DEBUG ACTIVE is on.
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January 6, 2010 19
Software Development
This chapter provides general information on software development as well as instructions for
Flash memory programming.
Software Description
The software provided with the EK-LM3S9B92 provides access to all of the peripheral devices
supplied in the design. The StellarisWare® Peripheral Driver Library is used to operate the on-chip
peripherals.
The software includes a set of example applications that utilize the StellarisWare Peripheral Driver
Library. These applications demonstrate the capabilities of the LM3S9B92 microcontroller, as well
as providing a starting point for the development of the final application for use on the
EK-LM3S9B92.
Source Code
The complete source code is included on the EK-LM3S9B92 CD. Refer to the Quickstart Guide for
a detailed description of hardware setup and how to install the source code. The source code and
binary files are installed in the DriverLib tree.
Tool Options
The source code installation includes directories containing projects and/or makefiles for the
following tool-chains:
Keil ARM RealView® Microcontroller Development System
IAR Embedded Workbench for ARM
CodeSourcery G++
Code Red Technology Red Suite
Generic Gnu C compiler
Evaluation versions of these tools may be downloaded from www.ti.com/stellaris. Due to code size
restrictions, the evaluation tools may not build all example programs. A full license is necessary to
re-build or debug all examples.
Instructions on installing and using each of the evaluation tools can be found in the Quickstart
guides (for example, Quickstart-Keil, Quickstart-IAR) which are available for download from the
evaluation kit section of our web site at www.ti.com/stellaris.
For detailed information on using the tools refer to the documentation included in the tool chain
installation or visit the website of the tools supplier.
Programming the EK-LM3S9B92 Board
The EK-LM3S9B92 software package includes pre-built binaries for each of the example
applications. If you installed DriverLib to the default installation path of C:/DriverLib, you can find
the example applications in “C:/DriverLib/boards/ek-tempest”. The ICDI board is used along with
Luminary Micro's LM Flash Programmer tool to program applications on the EK-LM3S9B92 board.
CHAPTER 3
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Software Development
20 January 6, 2010
To program example applications into the EK-LM3S9B92 evaluation board using the ICDI
board:
1. Install LM Flash Programmer on a Windows PC.
2. Connect the 10-wire ribbon cable to the 10-pin header on the ICDI board and to the 10-pin
header on the EK-LM3S9B92 board. The red stripe on the ribbon cable should be facing the
bottom of the connectors (see Figure B-5 on page 29).
3. Connect the 8-wire ribbon cable to the 8-pin header on the ICDI board and to the 8-pin header
on the EK-LM3S9B92 board. The red stripe on the ribbon cable should be facing the bottom of
the connectors (see Figure B-5 on page 29).
4. Verify that slide switch SW3 on the EK-LM3S9B92 board is set to EXTernal.
5. Connect the USB cable A-plug to an available port on the PC and the miniB-plug to the ICDI
board.
6. Verify that POWER LED D1 on the ICDI board is lit and POWER LED D1 on the
EK-LM3S9B92 board is also lit.
7. Run LM Flash Programmer.
8. In the Configuration tab, use the Quick Set control to select LM3S9B92 Evaluation Board.
9. Move to the Program tab and click the Browse button. Navigate to the example applications
directory (the default location is “C:/DriverLib/boards/ek-tempest/).
10. Each example application has its own directory. Navigate into the example directory that you
want to load and then into the directory which contains the binary (*.bin) files. Select the binary
file and click Open.
11. Set the “Erase Method” to “Erase Necessary Pages” and check the “Verify After Program” box.
12. Next, click the Program button to start the Erase, Download and Verify process. The DEBUG
ACTIVE LED (D2) on the ICDI will turn on at this time.
13. Program execution will start once Verify is complete.
The EK-LM3S9B92 design uses a Stellaris® LM3S9B92 microcontroller to handle networking,
USB-OTG, and peripheral functions. The entire circuit is built on a compact four-layer printed
circuit board. All design files are provided on the EK-LM3S9B92 CD.
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