Download Stellaris LM3S811 Evaluation Board User`s Manual (Rev. B)

Stellaris® LM3S811 Evaluation Board
User ’s Manual
EK-LM3S811 -05
Co pyrigh t © 2 006– 201 0 Te xas In strumen ts
Copyright
Copyright © 2006–2010 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
2
January 6, 2010
Stellaris® LM3S811 Evaluation Board
Revision History
This table provides a summary of the document revisions.
Date
Revision
September 2006
00
Initial release of doc to customers.
December 2006
01
Changed value in Table B-1 for Pad 11.
January 2009
02
Changed value in Table 3-1 for User Push Switch Input.
August 2009
03
Changed branding from Luminary Micro to Texas Instruments.
September 2009
04
Changed display and display interface information.
January 2010
05
Added Code Composer Studio™ to list of support toolchains.
January 6, 2010
Description
3
4
January 6, 2010
Stellaris® LM3S811 Evaluation Board
Table of Contents
Chapter 1: Stellaris® LM3S811 Evaluation Board ......................................................................................... 9
Features.............................................................................................................................................................. 9
Block Diagram .................................................................................................................................................. 10
Evaluation Kit Contents .................................................................................................................................... 10
Evaluation Board Specifications ................................................................................................................... 11
System Requirements................................................................................................................................... 11
Supported Devices........................................................................................................................................ 11
Features of the LM3S811 Microcontroller......................................................................................................... 11
Chapter 2: Getting Started ............................................................................................................................. 13
Powering the Board .......................................................................................................................................... 13
Installing the Drivers ......................................................................................................................................... 13
Driver Installation .......................................................................................................................................... 13
Completing Driver Installation ....................................................................................................................... 13
Running the Quickstart Application................................................................................................................... 14
Chapter 3: Hardware Description .................................................................................................................. 15
LM3S811 Microcontroller.................................................................................................................................. 15
Device Overview ........................................................................................................................................... 15
Clocking ........................................................................................................................................................ 15
Reset............................................................................................................................................................. 15
Power Supply................................................................................................................................................ 15
Debugging..................................................................................................................................................... 15
USB Device Controller Functions ..................................................................................................................... 16
Device Overview ........................................................................................................................................... 16
USB to JTAG/SWD ....................................................................................................................................... 16
Virtual COM Port........................................................................................................................................... 16
Organic LED Display ........................................................................................................................................ 16
Features........................................................................................................................................................ 16
Control Interface ........................................................................................................................................... 16
Power Supply................................................................................................................................................ 17
Design Guidelines......................................................................................................................................... 17
Further Reference......................................................................................................................................... 17
Other Peripherals.............................................................................................................................................. 17
Thumbwheel Potentiometer .......................................................................................................................... 17
User LED ...................................................................................................................................................... 17
User Pushbutton ........................................................................................................................................... 17
Bypassing Peripherals ...................................................................................................................................... 17
Interfacing to the EVB....................................................................................................................................... 18
Using the In-Circuit Debugger Interface ........................................................................................................... 18
ICDI Features................................................................................................................................................ 19
Enabling ICDI Mode...................................................................................................................................... 19
ARM Target Cable ........................................................................................................................................ 19
Starting ICDI ................................................................................................................................................. 19
January 6, 2010
5
Chapter 4: Communications .......................................................................................................................... 21
Using the Virtual COM Port .............................................................................................................................. 21
Confirming Driver Installation........................................................................................................................ 21
Installing the VCP Device Driver................................................................................................................... 22
About HyperTerminal........................................................................................................................................ 24
Starting HyperTerminal ................................................................................................................................. 24
Appendix A: Schematics................................................................................................................................ 27
Appendix B: Connection Details ................................................................................................................... 31
Component Locations....................................................................................................................................... 31
Evaluation Board Dimensions........................................................................................................................... 32
I/O Breakout Pads and Recommended Connectors......................................................................................... 32
ARM Target Pinout ........................................................................................................................................... 34
6
January 6, 2010
Stellaris® LM3S811 Evaluation Board
List of Figures
Figure 1-1.
Figure 1-2.
Figure 3-1.
Figure 4-1.
Figure A-1.
Figure A-2.
Figure A-3.
Figure B-1.
Figure B-2.
Evaluation Board Layout ................................................................................................................. 9
LM3S811 Evaluation Board Block Diagram .................................................................................. 10
ICD Interface Mode ....................................................................................................................... 18
Check VCP Driver Installation ....................................................................................................... 21
LM3S811 Microcontroller (sheet 1 of 3) ........................................................................................ 28
LM3S811 Microcontroller (sheet 2 of 3) ........................................................................................ 29
LM3S811 Microcontroller (sheet 3 of 3) ........................................................................................ 30
Component Locations ................................................................................................................... 31
Evaluation Board Dimensions ....................................................................................................... 32
January 6, 2010
7
Stellaris® LM3S811 Evaluation Board
List of Tables
Table 3-1.
Table B-1.
Table B-2.
Table B-3.
Isolating On-Board Hardware........................................................................................................ 18
I/O Breakout Pads ......................................................................................................................... 32
Recommended Connectors........................................................................................................... 33
20-Pin JTAG/SWD Configuration .................................................................................................. 34
January 6, 2010
8
C H A P T E R 1
Stellaris® LM3S811 Evaluation Board
The Stellaris® LM3S811 Evaluation Board is both a compact and versatile evaluation platform for
the Stellaris LM3S811 ARM® Cortex™-M3-based microcontroller, and an In-Circuit Debug
Interface (ICDI) for any Stellaris microcontroller-based target board. The EVB allows users to
evaluate, prototype, and create application-specific designs.
Figure 1-1.
Evaluation Board Layout
Reset Switch
OLED Display
User LED
Thumbwheel
Potentiometer
USB Interface
for In-Circuit
Debugging
®
Stellaris LM3S811
User Push Switch
JTAG/SWD to
external target
Features
The Stellaris® LM3S811 Evaluation Board includes the following features:
„
Stellaris® LM3S811 microcontroller
„
OLED graphics display with 96 x 16 pixel resolution
„
User-programmable pushbutton and LED
„
Reset pushbutton and power indicator LED
„
Thumbwheel potentiometer for driving an Analog-to-Digital Converter (ADC) input
„
Standard ARM® 20-pin JTAG debug connector for use as an In-Circuit Debug Interface (ICDI)
„
I/O signal break-out pads for hardware prototyping
„
UART0 accessible through a USB Virtual COM Port (VCP)
„
USB interface for all communication and power
January 6, 2010
9
Stellaris® LM3S811 Evaluation Board
Block Diagram
LM3S811 Evaluation Board Block Diagram
Target
Cable
Figure 1-2.
Dual
USB
Device
Controller
Stellaris
LM3S811
MCU
I/O Signals
USB Cable
USB
OLED Display
96 x 16
SWD/JTAG
Mux
20-pin ARM
JTAG/SWD Output
Debug
I/O Signal Break-out
UART0
Switch
Pot
Reset
+5V
+3.3V Voltage
Regulator
Reset
LED
I/O Signal Break-out
Evaluation Kit Contents
The evaluation kit contains everything needed to develop and run applications for Stellaris
microcontrollers including:
„
LM3S811 Evaluation Board (EVB)
„
USB cable
„
20-pin JTAG/SWD target cable
„
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
10
January 6, 2010
Stellaris® LM3S811 Evaluation Board
Evaluation Board Specifications
„
Board supply voltage:
4.37–5.25 Vdc from USB connector
„
Board supply current:
80 mA typ (fully active, CPU at 50 MHz)
„
Break-out power output:
3.3 Vdc (100 mA max)
„
Dimensions:
3.90” x 1.40” x 0.30” (LxWxH)
„
RoHS status:
Compliant
System Requirements
„
Microsoft Windows 2000, XP, or 2003
„
128 MB of RAM (512 MB recommended)
„
100 MB of available hard-disk space
„
1024 x 768 minimum screen resolution
„
CD-ROM drive
„
USB port
Supported Devices
In-Circuit Debug Interface (ICDI) mode presently supports all Stellaris® Family devices.
Features of the LM3S811 Microcontroller
„
32-bit ARM® Cortex™-M3 v7M architecture optimized for small-footprint embedded
applications
– Thumb®-compatible Thumb-2-only instruction set processor core for high code density
– 50-MHz operation
– Hardware-division and single-cycle-multiplication
– Integrated Nested Vectored Interrupt Controller (NVIC) providing deterministic interrupt
handling
– 27 interrupt channels with eight priority levels
„
64 KB single-cycle flash with two forms of flash protection on a 2-KB block basis
„
8 KB single-cycle SRAM
„
Three timers, each of which can be configured: as a single 32-bit timer, as a dual 16-bit timer
with capture and simple PWM modes, or to initiate an ADC event
„
Real-Time Clock (RTC) capability
„
Separate watchdog clock with an enable
„
Programmable interrupt generation logic with interrupt masking
„
Lock register protection from runaway software
„
Reset generation logic with an enable/disable Synchronous Serial Interface (SSI)
„
Programmable interface operation for Freescale SPI, National Semiconductor
MICROWIRE™, or Texas Instruments synchronous serial
– Master or slave operation
January 6, 2010
11
Stellaris® LM3S811 Evaluation Board
„
Two fully programmable 16C550-type UARTs
– Separate 16x8 transmit (TX) and 16x12 receive (RX) FIFOs to reduce CPU interrupt
service loading
– Programmable baud-rate generator
„
Analog-to-Digital Converter (ADC)
– Single- and differential-input configurations
– Four 10-bit channels (inputs) when used as single ended inputs
– Sample rate of 500 thousand samples/second
12
„
I2C Bus with Master and slave receive and transmit operation with transmission speed up to
100 Kbps in Standard mode and 400 Kbps in Fast mode
„
Six motion-control PWM outputs
„
1 to 32 GPIOs, depending on user configuration
„
On-chip Linear Drop-Out (LDO) voltage regulator
„
3.3-V supply brownout detection and reporting via interrupt or reset
„
On-chip temperature sensor
„
48-pin RoHS-compliant LQFP
„
Industrial operating temperature
January 6, 2010
C H A P T E R 2
Getting Started
The Stellaris LM3S811 Evaluation Kit Quickstart provides step-by-step instructions
for getting started with your Stellaris LM3S811 Evaluation Kit. For your convenience these
instructions are summarized below.
Powering the Board
The Stellaris LM3S811 Evaluation Board (EVB) is configured for immediate use. To power the
EVB, use the USB cable supplied in the kit. Connect the mini-b (smaller) end of the USB cable to
the connector labeled “USB” on the EVB. Connect the other end (Type A) to a free USB port on
your host PC. The USB interface is capable of sourcing up to 500 mA for each attached device,
which is sufficient for the evaluation board. If connecting the board through a USB hub, it must be
a powered hub.
When you plug in the EVB for the first time, Windows starts the Found New Hardware Wizard. The
Stellaris LM3S811 Evaluation Kit Quickstart Guide steps through the process of installing drivers
for the Stellaris LM3S811 Evaluation Board.
Installing the Drivers
The Stellaris LM3S811 Evaluation Board requires several hardware drivers. All drivers are located
in the \Tools\Ftdi directory on the Software and Documentation CD. Each time Windows requests a
driver for this device, point it to the Software and Documentation CD.
Driver Installation
When the Found New Hardware Wizard starts, Windows asks if it can connect to Windows Update
to search for software. Select “No, not this time,” and then click Next.
The Found New Hardware Wizard then asks you from where to install the software. Select “Install
from a list or specific location (Advanced)” and click Next.
Make sure the Documentation and Software CD that came with the evaluation kit is in your
CD-ROM drive. Select “Search for the best driver in these locations,” and check the “Search
removable media (floppy, CD-ROM…)” option. Click Next.
A warning pops up during the Hardware Installation; click Continue Anyway.
Windows now finishes installing the drivers for “Stellaris Evaluation Board A.” When the driver
install is finished, a window appears. Click Finish to close the dialog box.
Completing Driver Installation
You have just installed the drivers for “Stellaris Evaluation Board A”. The USB device built into the
EVB is a composite USB device. After you click Finish, a new Found New Hardware Wizard
window appears asking to install drivers for another device. This is for the “Stellaris Evaluation
Board B” part of the composite USB device. Follow the same instructions as above to install the
drivers for this device.
The Found New Hardware Wizard appears one last time. This is to install the drivers for the
“Stellaris Virtual COM Port”. Again, follow the same instructions above to install the drivers for this
device.
January 6, 2010
13
Getting Started
Now all of the hardware drivers for the LM3S811 Evaluation Board have been installed. These
drivers give the debugger access to the JTAG interface and the host PC access to the Virtual COM
Port.
Running the Quickstart Application
The quickstart application is a game in which you navigate a ship through an endless tunnel. Use
the potentiometer (POT) to move the ship up and down, and the user pushbutton (USER) to fire a
missile to destroy obstacles in the tunnel. Score accumulates for survival and destroying
obstacles. The game lasts for only one ship; the score displays at the end of the game.
Since the OLED display on the evaluation board has burn-in characteristics similar to a CRT, the
application also contains a screen saver. The screen saver only becomes active if two minutes
have passed without the user pushbutton being pressed while waiting to start the game (i.e., the
screen saver never appears during game play). An implementation of the Game of Life is run with
a field of random data as the seed value.
After two minutes of running the screen saver, the display turns off and the user LED blinks. Exit
either mode of screen saver (Game of Life or blank display) by pressing the user pushbutton
(USER). Press the button again to start the game.
While the game is being played, a running tally of the score is output through UART0 of the
LM3S811. UART0 is connected to the FTDI’s second serial channel. This serial channel is
available to Windows as a Virtual COM Port. To view the score, open up a terminal application
such as HyperTerminal. Connect using COM#, where # is the number Windows has assigned the
Virtual COM Port. Set the serial connection to a baud rate of 115200, 8 data bits, no parity, 1 stop
bit, and no flow control.
Important: The quickstart application will not run if one or more jumpers are removed.
14
January 6, 2010
C H A P T E R 3
Hardware Description
This chapter provides the hardware description for the LM3S811 microcontroller including the
peripherals included in the evaluation kit.
LM3S811 Microcontroller
Device Overview
The heart of the EVB is a Stellaris LM3S811 ARM® Cortex™-M3-based microcontroller. The
LM3S811 offers 64 KB flash memory, 50-MHz operation, a 4-channel ADC, and a wide range of
peripherals. Refer to the LM3S811 data sheet (order number DS-LM3S811) for complete device
details.
The LM3S811 microcontroller is factory programmed with a quickstart demo program. The
quickstart program resides in the LM3S811 on-chip flash memory and runs each time power is
applied, unless ICDI mode is in use, or the quickstart has been replaced with a user program.
Clocking
A single external 6.0-Mhz crystal drives the LM3S811 microcontroller. All required internal clocks
are generated automatically within the device. The LM3S811 microcontroller is designed to run the
ARM Cortex core at 50 Mhz on this evaluation board.
Reset
The LM3S811 microcontroller shares its external reset input with the OLED display. Reset is
asserted (Active Low) under any one of the following conditions:
„
Power-on reset (duration set by resistor R1 and capacitor C2)
„
Reset switch SW2 is held down
„
In ICDI mode
„
By the USB device controller (U2 FT2232), when instructed by the debugger
The Keil RVMDK debugger does not support external reset. Instead, the target device is reset
using JTAG operations. In ICDI mode, the reset push-switch has no effect.
Power Supply
The LM3S811 is powered from a +3.3-V supply rail that is common to all devices on the EVB. A
low-dropout (LDO) regulator regulates +5 V power from the USB cable to +3.3 V. +3.3 V at up to
100 mA is available for powering external circuits at break-out pin 20.
Debugging
Stellaris microcontrollers support programming and debugging using either JTAG or SWD. JTAG
uses the TCK, TMS, TDI, and TDO signals. SWD requires fewer signals—SWCLK, SWDIO, and
SWO. The debugger determines which debug protocol is used. For example, Keil RVMDK tools
support only JTAG debugging.
January 6, 2010
15
Hardware Description
JTAG/SWD signals are multiplexed with GPIO functions inside the Stellaris microcontroller. Do not
configure JTAG/SWD pins (including PB7/TRST) as GPIO. Doing this prevents in-circuit
programming and debugging.
USB Device Controller Functions
Device Overview
An FT2232 device from Future Technology Devices International Ltd manages USB-to-serial
conversion. The FT2232 is factory configured to implement a JTAG/SWD port (synchronous serial)
on channel A and a Virtual COM Port (VCP) on channel B. This feature allows two simultaneous
communications links between the host computer and the target device using a single USB cable.
Separate Windows drivers for each function are provided on the Documentation and Software CD.
A small serial EEPROM holds the FT2232 configuration data. The EEPROM is not accessible by
the LM3S811 microcontroller.
For full details on FT2232 operation, go to www.ftdichip.com.
USB to JTAG/SWD
The FT2232 USB device performs JTAG/SWD serial operations under the control of the debugger.
Two 74LV125 hex buffers multiplex SWD and JTAG functions and provide direction control for the
bi-directional data line when working in SWD mode.
Virtual COM Port
The Virtual COM Port (VCP) allows Windows applications (such as HyperTerminal) to
communicate with UART0 on the LM3S811 over USB. Once the FT2232 VCP driver is installed,
Windows assigns a COM port number to the VCP channel.
For more information, see Using the Virtual COM Port on page 21.
Organic LED Display
The EVB features an Organic LED (OLED) graphics display with 96 x 16 pixel resolution. OLED is
a new technology that offers many advantages over LCD display technology.
Features
„
RiT RGS08096016BW001 series display
„
96 columns by 16 rows
„
1 bit/pixel monochrome
„
High-contrast (typ. 2000:1)
„
Excellent brightness (100 cd/m2)
„
Fast response
Control Interface
The OLED display has a built-in controller IC (SSD1300) with synchronous serial and I2C
interfaces. I2C is used on the EVB as it only requires two microcontroller pins. The OLED display
has a fixed I2C address of 0x3d. The Stellaris driver library (DriverLib) (included on the
Documentation and Software CD) contains complete drivers with source-code for the OLED
display.
16
January 6, 2010
Stellaris® LM3S811 Evaluation Board
Note that the SSD1300’s I2C bus implementation is not 100% compliant with the I2C specification.
Designers should refer to the SSD1300 datasheet before connecting other I2C devices to the bus.
Power Supply
A +10 V supply is needed to bias the OLED display. In addition, a boost converter has been added
to the board. This supply is dedicated to the OLED display and should not be used to power other
devices.
Design Guidelines
The OLED display has a lifetime of about 10,000 hours. It is also prone to degradation due to burnin, similar to CRT and plasma displays. The quickstart application includes both a screen-saver
and a power-down mode to extend display life. These factors should be considered when
developing EVB applications that use the OLED display.
When using the EVB as an In-Circuit Debug Interface (ICDI), the OLED display is held in reset to
reduce power consumption and eliminate display wear-out.
Further Reference
For additional information on the RGS08096016BW001 OLED display, see the www.rtidisplay.com
web site..
Full details on the SSD1300 controller are available from the Solomon Systech, Ltd., web site:
www.solomon-systech.com.
Other Peripherals
Thumbwheel Potentiometer
A thumbwheel potentiometer connects to Channel 0 of the Analog-to-Digital Converter (ADC). A
padding resistor (R7) sets the voltage range to 0 to 3.0 V. This corresponds with the full-scale
range of the LM3S811’s 10-bit ADC. The ADC input voltage increases with clockwise
potentiometer rotation.
User LED
A user LED (D1) is provided for general use. The LED is connected to PC5/CCP1, allowing the
option of either GPIO or PWM control (brightness control). Refer to the Quickstart Application
source code for an example of PWM control.
User Pushbutton
A user pushbutton (SW2) is provided for general use. The switch interfaces to PC4 of the
LM3S811.
Bypassing Peripherals
The EVB’s on-board peripheral circuits require eight GPIO lines, leaving up to 24 GPIO lines
immediately available for connection to external circuits. If all GPIO lines are needed, then the
on-board hardware can be bypassed. The EVB is populated with eight 0-ohm resistor jumpers,
which can be removed to isolate on-board hardware.
January 6, 2010
17
Hardware Description
Important: The quickstart application will not run if one or more jumpers are removed.
Table 3-1. Isolating On-Board Hardware
MCU Pin
EVB Function
To Isolate, Remove...
Pin 33 PB2/I2CSCL
I2C SCL to Display
JP1
Pin 34 PB3/I2CSDA
I2C SDA to Display
JP2
Pin 17 PA0/U0Rx
VCP Receive
JP3
Pin 18 PA1/U0Tx
VCP Transmit
JP4
Pin 1 ADC0
ADC Input from Thumbwheel Potentiometer
JP5
Pin 14 GPIO PC4
User Push Switch Input
JP6
Pin 29 GPIO PC5
User LED output
JP7
Pin 48 GPIO PD7
OLED Power Enable
JP8
Interfacing to the EVB
An array of accessible I/O signals makes it easy to interface the EVB to external circuits. All
LM3S811 I/O lines (except those with JTAG functions) are brought out to 0.1” pitch pads. For quick
reference, silk-screened labels on the PCB show primary pin functions.
Table B-1 on page 32 has a complete list of I/O signals as well as recommended connectors.
Most LM3S811 I/O signals are +5-V tolerant. 5-V tolerant pins will not be damaged when
connected to 5-V logic circuits. It is recommended that datasheets be checked for compatibility
when mixing logic types. Refer to the LM3S811 datasheet for detailed electrical specifications.
Using the In-Circuit Debugger Interface
The Stellaris LM3S811 Evaluation Kit can operate as an In-Circuit Debugger Interface (ICDI). ICDI
acts as a USB to the JTAG/SWD adaptor, allowing debugging of any external target board that
uses a Stellaris microcontroller.
Figure 3-1.
ICD Interface Mode
LM3S811 EVB
`
USB
PC with IDE/
debugger
Stellar is
MC U
J TAG/SWD
Targ et C abl e
Stellaris
MC U
Target
Board
This LM 3 S811 is he ld
in re set
The debug interface operates in either Serial-Wire Debug (SWD) or full JTAG mode, depending on
the configuration in the debugger IDE.
The Keil RVMDK does not distinguish between normal Evaluation Board mode and ICDI mode.
The only requirement is that the correct Stellaris device is selected in the project configuration.
18
January 6, 2010
Stellaris® LM3S811 Evaluation Board
ICDI Features
ICDI includes the following features:
„
Standard ARM® 20-pin JTAG debug connector
„
USB 2.0 full speed interface allows JTAG/SWD debug
„
Compatible with leading ARM Integrated Development Environment (IDE) packages including
Keil RVMDK.
Enabling ICDI Mode
ICDI mode is enabled when the 20-pin JTAG/SWD target cable is connected to an external target.
In this mode, the on-EVB LM3S811 microcontroller and OLED display are held in reset.
Applications can not be executed in the on-EVB microcontroller when the EVB is connected as an
ICDI device.
ARM Target Cable
The evaluation kit includes a 3-inch target cable for connecting the EVB to an external target.
Cables up to 8-inch long can be used if required.
Target cable pin assignments are compatible with the ARM 20-pin standard (see Table B-3 on
page 34). The target board must have GND connections on even pins from 4 through 20,
otherwise the ICDI is not enabled when the target is connected. In this case, there will be conflict
between the JTAG/SWD signals on the LM3S811evaluation board and the external Stellaris
device.
When using the kit as an evaluation board, do not make connections to the debug out connector.
Starting ICDI
With the USB cable removed, connect the EVB to a Stellaris microcontroller-based target board
using the 20-pin JTAG/SWD target cable included in the Stellaris LM3S811 Evaluation Kit.
The red stripe on the cable should match pin 1 on both the EVB debug out connector and the
target. When inserted correctly, the polarizing tab on the connector fits into the slot on the EVB
PCB, so that the ribbon cable exits away from you.
Apply power to the target device, and then connect the USB cable to the LM3S811 Evaluation
Board. The OLED display should not show any information. If it does display an image, then check
the target JTAG/SWD connections to ensure the on-EVB LM3S811 microcontroller is being held in
reset.
The Keil RVMDK is now be able to program and debug the target Stellaris microcontroller.
January 6, 2010
19
Hardware Description
20
January 6, 2010
C H A P T E R 4
Communications
This chapter describes available communication for the LM3S811 microcontroller through the
Virtual COM Port and the Windows application, HyperTerminal.
Using the Virtual COM Port
The Virtual COM Port (VCP) is a convenient way for Windows applications to communicate with
UART0 on the LM3S811 microcontroller over USB. It offers all the capabilities of a standard
RS232 interface without an additional cable.
Confirming Driver Installation
The VCP device driver is normally installed as part of the quickstart process. Confirm that the VCP
device driver is installed by doing the following.
1. Connect the EVB to a PC using the USB cable supplied in the evaluation kit.
2. Open the Windows Device Manager, by either holding down the Windows Key and pressing
the Pause/Break key, or, from the Start Menu, selecting Control Panel and then clicking on the
System Icon.
3. Select the Hardware Tab, and click the Device Manager button.
4. In Device Manager, scroll down until you see Ports (COM & LPT). Click to expand this item.
You should see a device called Stellaris Virtual COM Port (COM).
Figure 4-1.
Check VCP Driver Installation
VCP Driver Installed
VCP Device Missing
The Windows operating system assigns the COM Port number automatically. It may change if the
EVB is reconnected.
If Device Manager does not show the Stellaris Virtual COM Port device, or if there is a question
mark by the device, it will be necessary to install or reinstall the device driver.
January 6, 2010
21
Communications
Installing the VCP Device Driver
When the EVB is first connected to a USB port, Windows automatically starts a driver installation
wizard. The following steps guide you through the installation wizard.
1. Connect the EVB to an available USB port using the USB cable supplied in the kit. In the
Found New Hardware Wizard window, select “No, not this time” and click Next.
2. Select “Install from a list or specific location (Advanced)” and click Next.
22
January 6, 2010
Stellaris® LM3S811 Evaluation Board
3. Insert the Stellaris® LM3S811 Evaluation Kit Documentation and Software CD in the CD-ROM
drive. Select “Search removable media (floppy, DR-ROM…)” and click Next.
4. Windows locates the driver on the Documentation and Software CD and start installing the
driver. A warning dialog like the one below pops up. Click Continue Anyway.
January 6, 2010
23
Communications
5. VCP drivers are now installed. Click Finish.
You may want to use Device Manager to identify the COM Port assignment.
Now that drivers are installed, Windows automatically assign a COM port to the LM3S811
Evaluation Board each time it is connected.
About HyperTerminal
HyperTerminal is an ASCII terminal emulator that is included with Windows. It provides an easy
way to transfer ASCII data to and from the LM3S811 Evaluation Board using the Virtual COM port
feature.
The quickstart application sends a running tally of the game score through UART0 of the
LM3S811.
Starting HyperTerminal
1. From the Windows XP Start menu, select:
Start > All Programs > Accessories > Communications > HyperTerminal
2. HyperTerminal asks for a name and icon to associate with the terminal profile you are about to
create. Neither the name nor the icon selection is critical.
24
January 6, 2010
Stellaris® LM3S811 Evaluation Board
3. Click OK to continue.
4. Select the COM port assigned to the LM3S811 Evaluation Board. In the example below, it is
COM7. Click OK.
January 6, 2010
25
Communications
5. Use the Properties dialog box to set the Port Settings. The quickstart application sends data at
115200 baud, 8 data bits, no parity, 1 stop bit, and no flow-control. Click OK.
6. HyperTerminal now starts. When the quickstart game is played, score data is visible in the
terminal window. Save the terminal settings when exiting HyperTerminal.
26
January 6, 2010
A P P E N D I X A
Schematics
Schematics for the Stellaris LM3S811 Evaluation Board follow.
January 6, 2010
27
28
D
C
B
A
0.01UF
0.1UF
Feb 2, 07
B
1
Jul 17, 09
Aug 18, 06
A
C
Aug 2, 06
Date
0
Revision
2
6.00MHz
18PF
C3
1
Y1
TCK
TMS_SWDIO
TDI
TDO_SWO
18PF
C4
ADC0
ADC1
ADC2
ADC3
RESETn
New RIT display, supports Serial Wire Out (SWO)
Add 5V break-out pad.
2
8
16
24
31
5
9
10
1
2
3
4
PE0/PWM4
PE1/PWM5
OSC0
35
36
PC4
PC5/CCP1
PC6/CCP3
PC7/CCP4
17
18
19
20
21
22
2
40
39
38
37
14
13
12
11
PA0/U0Rx
PA1/U0Tx
PA2/SSIClk
PA3/SSIFss
PA4/SSIRx
PA5/SSITx
Release for Rev A PCB, First Production Release
Release for Rev 0 PCB
Description
C2
C30
27
R1
10K
+3.3V
MBR0520
D4
27
R6
SW1
SW-PB
R38
History
EXTDBGENn
USBRSTn
Eval Reset Switch
1
LM3S811
GND
GND
GND
GND
RST
OSC0
OSC1
ADC0
ADC1
ADC2
ADC3
PE0/PWM4
PE1/PWM5
PC0/TCK/SWCLK
PC1/TMS/SWDIO
PC2/TDI
PC3/TDO/SWO
PC4
PC5/CCP1
PC6/CCP3
PC7/CCP4
PA0/U0Rx
PA1/U0Tx
PA2/SSIClk
PA3/SSIFss
PA4/SSIRx
PA5/SSITx
U1
7
15
23
32
6
25
26
27
28
45
46
47
48
29
30
33
34
44
43
42
41
Pin 1 is Omitted
for Polarization
PC7/CCP4
PB5/CCP5
PD6/Fault
PC4
PA0/U0Rx
PA1/U0Tx
PA2/SSIClk
PA3/SSIFss
PA4/SSIRx
PA5/SSITx
PD1/PWM1
PD0/PWM0
GND
PD2/U1Rx
PD3/U1Tx
PB0/PWM2
PB1/PWM3
GND
+3.3V
+5V
VDD
VDD
VDD
VDD
LDO
PD0/PWM0
PD1/PWM1
PD2/U1Rx
PD3/U1Tx
PD4/CCP0
PD5/CCP2
PD6/Fault
PD7
PB0/PWM2
PB1/PWM3
PB2/I2CSCL
PB3/I2CSDA
PB4/C0PB5/CCP5
PB6/C0+
PB7/TRST
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
0.1UF
C5
PD0/PWM0
PD1/PWM1
PD2/U1Rx
PD3/U1Tx
PD4/CCP0
PD5/CCP2
PD6/Fault
PD7/C0O
PB0/PWM2
PB1/PWM3
PB2/I2CSCL
PB3/I2CSDA
PB4/C0PB5/CCP5
PB6/C0+
0.1UF
C6
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
3
LDO
0.1UF
C9
ADC3
ADC2
ADC1
ADC0
GND
PD4/CCP0
PC5/CCP1
PD5/CCP2
PC6/CCP3
GND
PD7/C0O
PB4/C0PB6/C0+
PB7
PE0/PWM4
PE1/PWM5
PB3/I2CSDA
PB2/I2CSCL
RESETn
GND
0.1UF
C8
+3.3V
PB7
0.1UF
C7
R2
10K
+3.3V
I/O Breakout Headers
3
1UF
C10
4
4
PD7/C0O
PC5/CCP1
PC4
ADC0
PA1/U0Tx
PA0/U0Rx
JP8
JP7
JP6
JP5
JP4
JP3
OLEDPWREN
220
R10
VCP_TX
VCP_RX
*
Approved:
DAY
Drawn by:
DAY
5
D1
Green
SW2
SW-PB
R8
10K
GND
+3.3V
R9
50K
R7
4.7K
+3.3V
JP2
Designer:
PB3/I2CSDA
PB2/I2CSCL
JP1
GND
1UF
C22
.01UF
GND
1M
C1
+3.3V
R5
RESETn
+10V
GND
R4
2.2K
GND
OLED-RIT-96X16
NC
VSS
TEST5
TEST4
TEST3
TEST2
TEST1
NC
NC
NC
VDD
BS1
BS2
NC
CSn
RESn
D/Cn
WRn
RDn
D0
D1
D2
D3
D4
D5
D6
D7
IREF
VCOMH
VCC
NC
Date:
B
Size
Document Number:
8/4/2009
Sheet
BD-LMWLV
of
3
108 Wild Basin Rd.
Suite 350
Austin, TX 78746
TI AEC - Austin
6
1
free GPIO lines as required.
MCU, Peripherals and I/O Breakout
Page Title:
6
Remove JP1..8 (0603 Resistors) to
LM3S811 Evaluation Board
Drawing Title:
Status LED
User Push Button
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
U2
Peripheral Devices
Thumbwheel Potentiometer
R3
2.2K
+3.3V +3.3V
5
C
Rev
D
C
B
A
Figure A-1. LM3S811 Microcontroller (sheet 1 of 3)
January 6, 2010
D
C
B
A
+5V
+5V
VBUS
CS
SK
DI
DO
1K 64X16
CAT93C46
VCC
NC
ORG
GND
U4
1
2
3
4
6
2
1
R22
10K
R23
2.2K
3
C11
1UF
+5V
1
R12
220
+3.3V
GND
NR
OUT
D3
Power LED
EN
IN
C17
10nF
TPS73633DBV
+5V
4.7UF
C14
C12
1UF
+3.3V
Y2
2
EECS
EESK
EEDATA
18PF
18PF
45
9
18
25
34
4
5
43
44
48
1
2
47
7
UDP
R20
1.5K
8
6
UDM
0.1UF
C18
FT2232
AGND
GND
GND
GND
GND
RESET#
RSTOUT#
XTIN
XTOUT
EECS
EESK
EEDATA
TEST
USBDP
USBDM
3V3OUT
U3
2
R11
10K
4
5
EN
VIN
FB
SW
U7
TPS61041DBV
VLF4012A-4R7
L1
4.7uH
3
1
C13
10PF
MBR0520
D2
+10V 10mA Switching Regulator
C20
C19
6.00MHz
1
R21
10K
R18 27
USBP
+5V
R17 27
USBM
OLEDPWREN
7
J42 USB_MINI_B_RECEPTACLE
9
5V
DD+
ID
G
4
8
5
USB +5V to +3.3V 400mA Power Supply
8
7
6
5
120ohm @ 100 MHz
FB2
120ohm @ 100 MHz
FB1
GND
2
GND
2
January 6, 2010
C15
1UF
R31
140K
R30
1.0M
3
C16
1UF
AVCC
VCC
VCC
VCCIOA
VCCIOB
PWREN#
BCBUS0
BCBUS1
BCBUS2
BCBUS3
SI/WUB
BDBUS0
BDBUS1
BDBUS2
BDBUS3
BDBUS4
BDBUS5
BDBUS6
BDBUS7
ACBUS0
ACBUS1
ACBUS2
ACBUS3
SI/WUA
ADBUS0
ADBUS1
ADBUS2
ADBUS3
ADBUS4
ADBUS5
ADBUS6
ADBUS7
3
46
3
42
14
31
41
30
29
28
27
26
40
39
38
37
36
35
33
32
15
13
12
11
10
24
23
22
21
20
19
17
16
+10V
0.1UF
C26
R24
470
VCP_RX
VCP_TX_SWO
VSENSE
DBGRSTn
R36
10K
+3.3V
R14
10K
R15
10K
12
C23
0.1UF
0.1UF
11
4
FT_SK
FT_DO
FT_DI
FT_CS
27
R25
0.1UF
C25
+5V
USBRSTn
0.1UF
C24
DBGENn
DBGMOD
C21
+3.3V
SWO_EN
VCP_TX_SWO
VCP_RX
10K
R19
4
U5D
SN74LVC125A
R16
10K
13
1
19
17
15 SRSTn
13 TDO
11
9 TCK
7 TMS
5 TDI
3
1
SRSTn
5
XTCK
XTMS_SWDIO
XTDI
XTDO_SWO
Date:
B
Size
8/3/2009
Document Number:
Sheet
BD-LMWLV
USB and Debugger Interfaces
Page Title:
LM3S811 Evaluation Board
Drawing Title:
2X10 HDR-SHRD
J41
JTAG/SWD
20
18
16
14
12
10
8
6
4
2
EXTDBGENn
5
6
2
6
of
3
C
Rev
D
C
B
A
Stellaris® LM3S811 Evaluation Board
Figure A-2. LM3S811 Microcontroller (sheet 2 of 3)
29
D
C
B
1
SWO_EN
VCP_TX_SWO
FT_DI
FT_CS
DBGENn
DBGMOD
5
2
3
6
2
U5B
SN74LVC125A
R29
10K
U5A
+3.3V
SN74LVC125A
1
4
FT_DO
R27
10K
2
1
3
U6A
SN74LVC125A
3
3
R33
10K
8
11
6
8
12
8
9
U9B
SN74LVC126A
6
U9A
SN74LVC126A
3
U5C
SN74LVC125A
U6C
SN74LVC125A
9
U9D
SN74LVC126A
12
U6B
SN74LVC125A
5
U9C
SN74LVC126A
5
2
9
11
U6D
SN74LVC125A
10
1
4
2
27
R28
27
R26
4
27
R35
TDO_SWO
27
R32
TMS_SWDIO
TDI
TCK
4
VCP_TX
XTDO_SWO
XTMS_SWDIO
XTDI
XTCK
5
5
+3.3V
U6E
SN74LVC125A
VCC
0.1UF
0.1UF
Size
Date:
8/3/2009
Document Number:
Debugger Multiplexer
Page Title:
B
0.1UF
C29
Sheet
BD-LMWLV
LM3S811 Evlauation Board
Drawing Title:
C28
C27
+3.3V
6
3
GND
VCC
GND
U5E
SN74LVC125A
6
GND
VCC
14
7
FT_SK
14
7
13
10
4
13
10
14
30
7
A
1
of
3
U9E
SN74LVC126A
C
Rev
D
C
B
A
Figure A-3. LM3S811 Microcontroller (sheet 3 of 3)
January 6, 2010
A P P E N D I X B
Connection Details
This appendix contains the following sections:
„
Component Locations
„
Evaluation Board Dimensions
„
I/O Breakout Pads and Recommended Connectors
„
ARM Target Pinout
Component Locations
Figure B-1. Component Locations
January 6, 2010
31
Evaluation Board Dimensions
Evaluation Board Dimensions
Figure B-2. Evaluation Board Dimensions
I/O Breakout Pads and Recommended Connectors
The LM3S811 EVB has 32 I/O pads, 6 power pads, and a reset signal, for a total of 39 pads.
Connection can be made by soldering wires directly to these pads, or by using 0.1” pitch headers
and sockets.
Table B-1. I/O Breakout Pads
Pad No.
32
Description
Pad No.
Description
1
BLANK
40
ADC3
2
PC7/CCP4
39
ADC2
3
PB5/CCP5
38
ADC1
4
PD6/Fault
37
ADC0a
5
PC4a
36
GND
6
PA0/U0Rxa
35
PD4/CCP0
7
PA1/U0Txa
34
PC5/CCP1
8
PA2/SSIClk
33
PD5/CCP2
9
PA3/SSIFss
32
PC6/CCP3
10
PA4/SSIRx
31
GND
11
PA5/SSITx
30
PD7/C0Oa
12
PD1/PWM1
29
PB4/C0-
January 6, 2010
Stellaris® LM3S811 Evaluation Board
Table B-1. I/O Breakout Pads (Continued)
Pad No.
Description
Pad No.
Description
13
PD0/PWM0
28
PB6/C0+
14
GND
27
PB7b
15
PD2/U1Rx
26
PE0/PWM4
16
PD3/U1Tx
25
PE1/PWM5
17
PB0/PWM2
24
PB3/I2CSDAa
18
PB1/PWM3
23
PB2/I2CSCLa
19
GND
22
RESET
20
+3.3V
21
GND
a. Indicates an I/O line that is used by EVB hardware.
b. PB7 should not be used as a GPIO.
Table B-2. Recommended Connectors
Pins 2-20 (19 way)
Pins 21-40 (20 way)
January 6, 2010
Socket
Sullins PPPC191LFBN-RC
Digikey S7052-ND
Pin Header
Sullins PTC19SAAN
Digikey S1012-19-ND
Socket
Sullins PPPC201LFBN-RC
Digikey S7053-ND
Pin Header
Sullins PTC20SAAN
Digikey S1012-20-ND
33
ARM Target Pinout
ARM Target Pinout
In ICDI mode, the Stellaris LM3S811 Evaluation Kit supports ARM’s standard 20-pin JTAG/SWD
configuration. The same pin configuration can be used for debugging over Serial Wire Debug
(SWD) and JTAG interfaces. The debugger software, running on the PC, determines which
interface protocol is used.
The Stellaris target board should have a 2x10 0.1” pin header with signals as indicated in
Table B-3.
Table B-3. 20-Pin JTAG/SWD Configuration
Function
Pin
Pin
Function
nc
1
2
nc
nc
3
4
GND
TDI
5
6
GND
TMS
7
8
GND
TCK
9
10
GND
nc
11
12
GND
TDO
13
14
GND
RST
15
16
GND
nc
17
18
GND
nc
19
20
GND
ICDI does not control the TRST (test reset) signal. This reset function is implemented as a
command over JTAG/SWD, so this signal is not necessary.
34
January 6, 2010
IMPORTANT NOTICE
Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements,
and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should
obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are
sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment.
TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with TI’s standard
warranty. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. Except where
mandated by government requirements, testing of all parameters of each product is not necessarily performed.
TI assumes no liability for applications assistance or customer product design. Customers are responsible for their products and
applications using TI components. To minimize the risks associated with customer products and applications, customers should provide
adequate design and operating safeguards.
TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right, copyright, mask work right,
or other TI intellectual property right relating to any combination, machine, or process in which TI products or services are used. Information
published by TI regarding third-party products or services does not constitute a license from TI to use such products or services or a
warranty or endorsement thereof. Use of such information may require a license from a third party under the patents or other intellectual
property of the third party, or a license from TI under the patents or other intellectual property of TI.
Reproduction of TI information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied
by all associated warranties, conditions, limitations, and notices. Reproduction of this information with alteration is an unfair and deceptive
business practice. TI is not responsible or liable for such altered documentation. Information of third parties may be subject to additional
restrictions.
Resale of TI products or services with statements different from or beyond the parameters stated by TI for that product or service voids all
express and any implied warranties for the associated TI product or service and is an unfair and deceptive business practice. TI is not
responsible or liable for any such statements.
TI products are not authorized for use in safety-critical applications (such as life support) where a failure of the TI product would reasonably
be expected to cause severe personal injury or death, unless officers of the parties have executed an agreement specifically governing
such use. Buyers represent that they have all necessary expertise in the safety and regulatory ramifications of their applications, and
acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products
and any use of TI products in such safety-critical applications, notwithstanding any applications-related information or support that may be
provided by TI. Further, Buyers must fully indemnify TI and its representatives against any damages arising out of the use of TI products in
such safety-critical applications.
TI products are neither designed nor intended for use in military/aerospace applications or environments unless the TI products are
specifically designated by TI as military-grade or "enhanced plastic." Only products designated by TI as military-grade meet military
specifications. Buyers acknowledge and agree that any such use of TI products which TI has not designated as military-grade is solely at
the Buyer's risk, and that they are solely responsible for compliance with all legal and regulatory requirements in connection with such use.
TI products are neither designed nor intended for use in automotive applications or environments unless the specific TI products are
designated by TI as compliant with ISO/TS 16949 requirements. Buyers acknowledge and agree that, if they use any non-designated
products in automotive applications, TI will not be responsible for any failure to meet such requirements.
Following are URLs where you can obtain information on other Texas Instruments products and application solutions:
Products
Applications
Amplifiers
amplifier.ti.com
Audio
www.ti.com/audio
Data Converters
dataconverter.ti.com
Automotive
www.ti.com/automotive
DLP® Products
www.dlp.com
Communications and
Telecom
www.ti.com/communications
DSP
dsp.ti.com
Computers and
Peripherals
www.ti.com/computers
Clocks and Timers
www.ti.com/clocks
Consumer Electronics
www.ti.com/consumer-apps
Interface
interface.ti.com
Energy
www.ti.com/energy
Logic
logic.ti.com
Industrial
www.ti.com/industrial
Power Mgmt
power.ti.com
Medical
www.ti.com/medical
Microcontrollers
microcontroller.ti.com
Security
www.ti.com/security
RFID
www.ti-rfid.com
Space, Avionics &
Defense
www.ti.com/space-avionics-defense
RF/IF and ZigBee® Solutions www.ti.com/lprf
Video and Imaging
www.ti.com/video
Wireless
www.ti.com/wireless-apps
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265
Copyright © 2010, Texas Instruments Incorporated