Luminary Stellaris User manual

RDK-S2E-02 Copyright © 2008 Luminary Micro, Inc.
Stellaris® Serial-to-Ethernet
Reference Design Kit
USER’S MANUAL

2November 4, 2008
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Stellaris® S2E RDK User’s Manual
November 4, 2008 3
Table of Contents
Chapter 1: Stellaris® Serial-to-Ethernet Reference Design Kit Overview...................................................7
Using the RDK....................................................................................................................................................7
Features..............................................................................................................................................................8
Kit Contents........................................................................................................................................................8
Description..........................................................................................................................................................8
Serial-to-Ethernet Module...............................................................................................................................8
Serial-to-Ethernet Connector Board................................................................................................................9
Flow Control......................................................................................................................................................10
Installation.........................................................................................................................................................10
Specifications....................................................................................................................................................11
Electrical .......................................................................................................................................................11
Mechanical....................................................................................................................................................11
Chapter 2: Serial-to-Ethernet Configuration and Firmware Update...........................................................13
Accessing the Configuration Website...............................................................................................................13
Using “My Network Places”...........................................................................................................................13
Using the LM S2E Browser Application........................................................................................................14
Home Page...................................................................................................................................................14
Port 0 and Port 1 Settings Pages .....................................................................................................................15
Miscellaneous Settings Page............................................................................................................................17
Firmware Update Page.....................................................................................................................................18
Chapter 3: Using the S2E Module as a Serial Extender over Ethernet......................................................21
Chapter 4: Using Serial-to-Ethernet as a Virtual COM Port........................................................................23
Overview...........................................................................................................................................................23
Install com0com................................................................................................................................................23
Install com2tcp..................................................................................................................................................28
Install LM PC S2E Configuration ......................................................................................................................28
Configure VCP Using the LM S2E PC Configuration Application.....................................................................29
Connection creation......................................................................................................................................30
Edit port names.............................................................................................................................................32
Manual VCP Configuration ...............................................................................................................................32
Verify VCP Operation .......................................................................................................................................33
Chapter 5: Hardware Description..................................................................................................................35
Block Diagram ..................................................................................................................................................35
Appendix A: Schematics................................................................................................................................37
Appendix B: Bill of Materials (BOM) .............................................................................................................39
Appendix C: Contact Information .................................................................................................................41

4November 4, 2008
List of Figures
Figure 1-1. Serial-to-Ethernet Module and S2E Connector Board ....................................................................7
Figure 1-2. Serial-to-Ethernet Module ...............................................................................................................9
Figure 1-3. Serial-to-Ethernet Connector Board................................................................................................9
Figure 1-4. S2E Module Connection to S2E-CKIT ..........................................................................................11
Figure 2-1. LM S2E Browser Window..............................................................................................................14
Figure 2-2. Home Page of the Configuration Website.....................................................................................15
Figure 2-3. Port 0 Configuration Window.........................................................................................................17
Figure 2-4. Miscellaneous Settings Page ........................................................................................................18
Figure 3-1. Implementing a Serial Extender over Ethernet..............................................................................21
Figure 4-1. Typical S2E Module .....................................................................................................................23
Figure 4-2. Luminary Micro menu group..........................................................................................................29
Figure 4-3. S2E module connection over Ethernet..........................................................................................30
Figure 4-4. Main LM S2E Configuration application window ...........................................................................31
Figure 4-5. Manual VCP configuration.............................................................................................................33
Figure 4-6. Com2tcp communication shown in the command prompt window................................................33
Figure 4-7. HyperTerminal File Properties Dialog ...........................................................................................34
Figure 5-1. Serial-to-Ethernet Block Diagram..................................................................................................35

Stellaris® S2E RDK User’s Manual
November 4, 2008 5
List of Tables
Table 1-1. J2 Header Signals.........................................................................................................................10
Table 1-2. J3 Header Signals.........................................................................................................................10
Table B-1. Serial-to-Ethernet Bill-of-Materials ................................................................................................39
Table B-2. Serial-to-Ethernet Connector Board Bill-of-Materials....................................................................40

6November 4, 2008

November 4, 2008 7
Stellaris® Serial-to-Ethernet Reference Design Kit
Overview
Reference Design Kits (RDKs) from Luminary Micro accelerate product development by providing
ready-to-run hardware. This kit includes all the necessary cables, S2E connector board, and
software to run a demo application out of the box.
Figure 1-1. Serial-to-Ethernet Module and S2E Connector Board1
Using the RDK
The recommended steps for using the RDK are:
Follow the Quickstart Guide included in the kit.
The Quickstart guide will help you get the S2E module up and running in minutes. It also
contains important safety information that should be read before using the RDK.
Follow the appropriate chapters in this document to configure the S2E module for a
specific application.
If required, customize the S2E module hardware and software. Luminary Micro provides
full source code and design files.
1. Images are not shown to scale.
Front
Back
CHAPTER 1

Stellaris® Serial-to-Ethernet Reference Design Kit Overview
8November 4, 2008
Features
The S2E module is intended as a simple add-on product to existing systems to provide network
connectivity. The RDK contains all the necessary hardware to quickly evaluate the module
capabilities. The S2E module RDK has the following features:
LM3S6432 Stellaris microcontroller with 96 kB of Flash memory and 32 kB of SRAM
10/100 Mbit Ethernet port
Two serial ports
–PORT0 is an asynchronous serial port with RS232 levels
• Data rates up to 230,400 bits/sec
• Includes RTS/CTS for flow control
–PORT1 has 4 CMOS/TTL level signals that can be configured several ways
• Data rates up to 1 Mbit/sec.
• As an asynchronous serial port with RTS/CTS flow control or with 2 GPIOs
• As 4 GPIOs
• As a synchronous serial port (master or slave) with support for SPI, uWire, and other
synchronous protocols
RDK is USB-powered, no additional power supply required
Ethernet boot loader for firmware upgrades
JTAG 10-pin debug header
Kit Contents
S2E Module: Serial-to-Ethernet module
S2E-CKIT: Serial-to-Ethernet connector board
USB A to miniB cable: For powering the module
Serial cable DB9M - DB9F: For connecting module to PC serial port
Ethernet retractable cable: For connecting S2E module to the network
20-pin to fine-pitch 10-pin ARM JTAG debug adapter
S2E-CKIT standoffs: For optional attachment to S2E-CKIT board
Description
Serial-to-Ethernet Module
Figure 1-2 shows the S2E module diagram. The S2E header connector provides the serial port
signals and power signals to the module. For the RDK, this is connected to the S2E-CKIT (see
Figure 1-3). For more information on the S2E module, see the Serial-to-Ethernet board data sheet.

Stellaris® S2E RDK User’s Manual
November 4, 2008 9
Figure 1-2. Serial-to-Ethernet Module
Serial-to-Ethernet Connector Board
Figure 1-3 shows the Serial-to-Ethernet connector board. The board connects to the S2E module
via the J1 connector, and provides connectors for power and serial port connections during RDK
evaluation and development. Power can be provided by the USB connector (5 V) or by the J3
header (3.3 V). A power indicator LED turns on when power is applied. Header J2 provides the
CMOS/TTL signals for the module Port1 signals, see Table 1-1. The J3 header signals are shown
in Table 1-2.
Figure 1-3. Serial-to-Ethernet Connector Board
RJ45
J1
Network
Connector
Faceplate
Spacers
(M3 thread)
Mounting
Hole
Mounting
Hole
S2E Header
Connector
JTAG Header
Pads
USB
DB9F
J1
J2
J3
D1
USB Power
Connector
PORT0
Connector
S2E Socket
Connector
(Bottom side)
PORT1 Header
3.3V Header
Power
Indicator
Standoff
Holes

Stellaris® Serial-to-Ethernet Reference Design Kit Overview
10 November 4, 2008
Flow Control
The S2E module supports bidirectional RTS/CTS flow control, as defined in the RS-232 E
standard.
For the receiver, in this mode of operation, the S2E asserts the CTS signal when it capable of
receiving data, and it deasserts the signal when transmission by the remote serial device should
be paused. In the S2E module, the CTS signal is asserted by setting the CTS output GPIO for the
0 (or low) level. The signal is deasserted by setting the GPIO output value to the 1 (or high) level.
For the transmitter, the RTS GPIO signal is monitored for state changes. When the state changes
to asserted, transmission is allowed/resumed. When the state changes to deasserted,
transmission is paused. The polarity of the RTS GPIO signal is interpreted in the same way as for
the CTS GPIO signal. If the RTS GPIO signal is 1 (or high level), it is considered to be deasserted,
and the UART transmitter is disabled (the current byte, if any, is completed). When the signal is 0
or low level), it is considered to be asserted, and the transmitter is re-enabled.
Installation
The requirements for installation include a PC with an available serial port with a DB9 male
connector and a USB port, and an available 10/100Mbit network port. The S2E-CKIT board
contains the connectors required for powering and connecting the module, and sits on top of the
S2E module. Use the following steps to connect the S2E module to the S2E-CKIT connector board
(see Figure 1-4).
1. Attach the provided nylon standoffs to S2E-CKIT (optional).
2. Attach S2E-CKIT to the S2E module. Align the 12-pin socket to the 12-pin connector on the
S2E module and press firmly.
Table 1-1. J2 Header Signals
J2 Header Pin Stellaris GPIO Description
1 PD2/PA4 Serial data input to S2E module (UART or SPI)
2 PD3/PA5 Serial data output from S2E module (UART or SPI)
3 PA3 UART CTS output or SPI select signal
4 PA2 UART RTS input or SPI clock signal
5 RSTn Reset input to S2E module (leave unconnected if unused)
6 GND Ground signal
Table 1-2. J3 Header Signals
J3 Header Pin Signal Description
3.3 V 3.3 V 3.3 V power input. Use only if the USB power connector is not used, other-
wise leave unconnected.
GND GND Ground signal