Silicon Laboratories CP2201EK Manual de usuario

CP2201-EK

CP2201EK USER’SGUIDE

1. Kit Contents

The CP2201 Evaluation kit contains the following items:

• CP2201 Embedded Ethernet Evaluation Board (CP2201EB)

• Silicon Laboratories Embedded Ethernet Evaluation Kit CD-ROM. CD content includes:

• CP2201EK User’s Guide (this document)

• Netfinder Utility

• Firmware Image for use with the Ethernet Bootloader

• C8051F34x and CP220x Data Sheets

• Universal 9 V DC Power Supply

• Straight Through Cat5e Ethernet Cable (Blue)

• Crossover Cat5e Ethernet Cable (Yellow)

• CP2201EK Quick Start Guide

2. CP2201EK Overview

The purpose of the CP2201EK is to provide a way to easily evaluate Silicon Laboratories Ethernet Solutions and

view some of the applications made possible by the CP2200/1. To develop embedded applications using the

CP2200/1, we offer a complete Embedded Ethernet Development Kit (Ethernet-DK). The Embedded Ethernet

Development Kit contains a TCP/IP Configuration Wizard that automatically generates code to perform many of the

functions in the CP2201EK. Numerous code and application examples are also provided in the development kit.

The CP2201EK is a fully contained evaluation board. The main system controller, which runs the TCP/IP Stack and

performs other system tasks, is a 50 MIPS Silicon Laboratories C8051F340. The Ethernet controller providing

network connectivity is the Silicon Laboratories CP2201—the industry’s smallest Ethernet controller. The third

major component on the board is the Ethernet connector (RJ-45) with integrated magnetics and LEDs.

On the software side, the C8051F340 is running the CMX Micronet Web Server. The embedded web server has

web pages for displaying temperature and light sensor data, controlling the yellow LED state, sending an e-mail,

remotely updating firmware, and displaying images and CP2201 Key Features. The embedded system can also be

accessed through a command line Telnet interface.

Figure 1 shows the CP2201EB and identifies its various components.

Figure 1. CP2201 Evaluation Board

Green LED

Link/Activity

CP2201

Ethernet

Controller

Light Sensor

C8051F340

MCU w/ on-chip

Temperature

Sensor

Yellow LED

System State

This datasheet has been downloaded fromhttp://www.digchip.com at this page

CP2201-EK

2 Rev. 0.1

3. Hardware Setup

The only external hardware connections required by the CP2201EB are power and a connection to a network. All

required system configuration is performed over the network, saving the board space and cost of an LCD screen or

dedicated UART interface.

1. Connect the CP2201EB to an unused Ethernet jack using the

blue

straight-through cable. This can be a

wall outlet or an empty port on a network router or switch. If an Ethernet outlet is not available, the CP2201

can be directly connected to a PC using the

yellow

crossover cable.

See Appendix A for additional setup instructions if using a crossover cable.

2. Power the CP2201EB using the universal power adapter supplied with the kit.

3. Wait until the yellow LED turns to solid yellow (not blinking), stops blinking (always on), or starts to blink

intermittently (blink twice then pause).

4. Software Setup

The included CD-ROM contains all CP2201EK documentation, the Netfinder utility, and a firmware image that can

be used for evaluating the Ethernet bootloader. To get started, insert the CD-ROM into your PC’s CD-ROM drive

and click “Netfinder.” Follow the on-screen instructions when the blue dialog automatically launches. If the dialog

does not automatically appear on the screen when you insert the CD-ROM, run autorun.exe found in the root

directory of the CD-ROM.

5. Network Setup

The CP2201EK software uses the Netfinder utility to find all CP2201EB boards connected to the network. If the

network has a DHCP server, then each device will automatically acquire an IP address once it detects that it has

been plugged into a live network. If there are multiple CP2201EB boards on the network, the Netfinder utility allows

the user to identify the desired device based on the time powered, time plugged into network, MAC address, or IP

address.

1. Press the

button as shown in Figure 2 to begin searching for devices.

Figure 2. Search Button

CP2201-EK

Rev. 0.1 3

2. If the CP2201EB was able to automatically obtain an IP address through DHCP, then its IP address will

appear inside a window with green background. If the device’s IP address is 0.0.0.1 and the window back-

ground is yellow, then skip this step and the following step. If the device was unable to automatically obtain

an IP address through DHCP, then its IP address will be 0.0.0.1 and it will appear inside a window with a

yellow background.

a. If the device appears in a yellow window, then go to step 4.

b. If the device appears in a green window, then click anywhere in the green window.

c. After the black border appears, press the Web Browser Quick Launch Button.

Figure 3. Web Browser Quick Launch Button

3. The default web browser should launch and display the home page served by the embedded web server.

The same result can be achieved by typing the IP address of the embedded web server into the address

bar of a web browser. Figure 4 shows a screenshot of the uWeb-v2.0 home page.

4. Now go directly to Section "CP2201 Evaluation Kit Demo‚" on page 6.

Figure 4. uWeb-v2.0 Home Page

CP2201-EK

4 Rev. 0.1

5. If the network does not have a DHCP server, then the CP2201EB will search for approximately 35 seconds

before going into static IP address mode. While searching, the yellow led will be blinking fast. After going

into static IP address mode, Netfinder will display information about the device in a window with a yellow

background. Select the device by clicking inside the yellow area and pressing the Assign IP button as

shown in Figure 5.

Figure 5. Static IP Address Mode

6. Enter the IP address, subnet mask, and default gateway (if known) into the ‘Assign IP Address’ dialog and

press OK. See Appendix A for information on how to configure the PC with a static IP address and how to

select a static IP address for the CP2201EB. A windows command line window should appear, ping the

device at its new address, then close. Programming is successful when the progress bar stops and gives

the message “Success - Device Programmed” as shown in Figure 6.

Figure 6. Assign IP Address Dialog

CP2201-EK

Rev. 0.1 5

7. Close the ‘Assign IP Address’ dialog then press Search to refresh the Netfinder screen. Select the device

by clicking inside the yellow area and pressing the Web Browser quick launch button as shown in

Figure 7.

Figure 7. Web Browser Quick Launch Button In Static IP Address Mode

8. The default web browser should launch and display the home page served by the embedded web server.

The same result can be achieved by typing the IP address of the embedded web server into the address

bar of a web browser. Figure 8 shows a screenshot of the uWeb-v2.0 home page.

Figure 8. uWeb-v2.0 Home Page

CP2201-EK

6 Rev. 0.1

6. CP2201 Evaluation Kit Demo

The CP2201EK demo includes:

Monitoring real-time sensor data using a web browser.

Controlling the state of the yellow LED from a web browser.

Sending an e-mail containing the latest sensor data.

Monitoring real-time sensor data using the Telnet interface.

Remotely updating firmware using the bootloader.

6.1. Monitoring Real-Time Sensor Data Using a Web Browser

Clicking the first link on the main web page ‘1. View sensor data’ will load the embedded sensor data web page

shown in Figure 8. This page alternates between refreshing the temperature and the light sensor data every two

seconds. The temperature measurements are taken from the C8051F340’s on-chip temperature sensor and the

ambient light reading is taken from the light sensor in the bottom right hand side of the board centered above the

“CP2201EB” label.

Figure 9. Viewing Sensor Data

6.2. Controlling the State of the Yellow LED Simulating Yellow/System Status LED From

a Web Browser

The yellow LED on the Ethernet connector is used to indicate system status when first connecting the CP2201EB

to a network.Table 1 describes the system states indicated by the yellow LED.

Table 1. Yellow LED States

LED State System State

Blinking (slow) The MCU is waiting for a network connection. The Ethernet cable is not connected.

Blinking (fast) The MCU is connected to a network and is trying to acquire an IP address using DHCP.

On (continuous) The system has obtained an IP address and is properly configured.

Blinking (intermittent) The system has entered static IP address mode. Please use Netfinder to assign a static

IP address or cycle power to continue searching for a DHCP server.

Off (continuous) A hardware error has occurred. Please cycle power.

CP2201-EK

Rev. 0.1 7

Clicking the second link on the main web page ‘2. Control Yellow LED’ will load the yellow LED control page shown

in Figure 10. Each of the links numbered 1 through 4 on this page borrow the yellow LED for 10 seconds and force

it to the state described in the text. The yellow LED state is restored after 10 seconds or if the 5th link ‘5. Restore

LED State’ is pressed. When finished going through the various LED states, click the ‘Home’ link to return to the

main page.

Figure 10. Yellow LED Control Page

6.3. Sending an E-mail Containing the Latest Sensor Data

To send an e-mail, the two pieces of information needed are the address of an SMTP server and the destination e-

mail address. This information can be entered in the HTML form on the main web page as shown in Figure 11. On

most networks, the SMTP server can be located by typing “ping mail” at the command prompt or asking a

system administrator. If the SMTP server address is unknown, a free software SMTP server that turns any

Windows PC into an outgoing mail server is available for download from http://www.gatecomm.com. Once the

software SMTP is running, use the PC’s IP address as the SMTP server address. The SMTP server address

cannot contain any letters—only numbers are permitted. The destination e-mail address must be less than 50

characters.

Figure 11. HTML Form Used For Sending E-Mail

CP2201-EK

8 Rev. 0.1

6.4. Monitoring Real Time Sensor Data Using the Telnet Interface

The temperature and light sensor data can be monitored using the command line Telnet interface. The Telnet

interface is very similar to UART, except bytes are sent over a TCP connection instead of an RS-232 cable.

1. If Hyperterminal is not the default telnet client on your PC, then start it using START-> All Programs ->

Accessories -> Communication -> HyperTerminal. Otherwise, skip to step 4.

2. The first time you run the program, you will be prompted to enter your area code. Enter the required infor-

mation and press Next or Cancel to continue.

3. When the ‘Connection Description’ Dialog appears, press Cancel, then exit from the application. Hyperter-

minal is now configured on your PC.

4. From Netfinder, select an embedded system and press the Hyperterminal quick launch button as shown

in Figure 12. This button initiates a Telnet connection with the selected CP2201EB using the default Telnet

client on your PC.

Figure 12. Initiating a Telnet Connection From Netfinder

Figure 13 shows a screenshot of the Telnet connection to the CP2201EB. Pressing the Skey starts printing and

updating samples on the screen. Pressing the Pkey pauses the updates. A key difference between this method of

accessing sensor data and the web browser is that the MCU initiates updates of the information on the screen. In a

web browser, the browser must request data from the MCU. Note: The Telnet demo has been configured with a

fast update rate. We recommend closing the Telnet connection when finished viewing data to free system

resources for other parts of the demo.

Figure 13. Telnet Interface

CP2201-EK

Rev. 0.1 9

6.5. Remotely Updating Firmware Using the Bootloader

The CP2201EB has a bootloader that can be used to update its firmware over the network. The bootloader uses

the Trivial File Transfer Protocol (TFTP) to transfer an image file from the PC (TFTP Client) to the CP2201EB

(TFTP Server). The transfer must be binary and the file name in the CP2201EB’s file system must be “boot.img”.

1. Open the main web page for the CP2201EB in a web browser and click on the third link ‘3. Update Firm-

ware.’ You should see a message saying that the server will no longer respond and that the bootloader will

shut down in 5 seconds.

2. Wait 5–10 seconds, then the CP2201EB should appear in yellow with a text description “Firmware Boot-

loader” as shown in Figure 14. Note: If the embedded system does not appear inside a yellow win-

dow, then keep searching until you see a yellow window with the title 'CP2201 Demo Board'.

Figure 14. Searching for the CP2201EB in Bootload Mode

3. Press the Bootloader quick launch button. When prompted, browse for the .img file containing the latest

firmware image and press OK. Note: Network drive paths beginning in “\\” cannot be used. An image

named CP2201EB_MFG2A.img can be found on the CD.

4. Once the image location is specified, the command line TFTP client (standard on all Windows PCs) is

launched and bootloading initiates. After 10 to 15 seconds, a confirmation message will appear on the

screen. Figure 15 shows an example of a confirmation message following a successful firmware update.

Figure 15. Successful Firmware Update

CP2201-EK

10 Rev. 0.1

APPENDIX A—USING ACROSSOVER CABLE

The CP2201EB can be connected to an Ethernet network using a standard Ethernet cable (see Figure 16) or

directly to a PC using a crossover cable (see Figure 17). Table 2 describes the benefits of using each of the

connection methods. A standard Ethernet cable is included in the kit and crossover cables are available for order

from the Silicon Laboratories website, at www.silabs.com.

Figure 16. Embedded Ethernet Network Connection (Standard Cable)

Figure 17. Embedded Ethernet Network Connection (Crossover Cable)

Table 2. Ethernet Cable Comparison

Standard Cable Crossover Cable

Remote access to embedded system. Distance from PC to embedded system is limited by

the length of the cable.

Multiple embedded systems may be networked and

accessed from the same (or multiple) PC(s).

Only a single embedded system may be accessed

from a single PC.

Shared communication medium. System may experi-

ence packet delays under heavy network traffic. This

effect is greatly reduced if using a switched network.

Dedicated channel bandwidth. Good for achieving

consistent data throughput measurements.

An existing network with wall outlet or a router/switch is

required.

No additional hardware required.

PC does not require any additional IP address configura-

tion.

PC must be configured with a static IP address in

order to recognize embedded system.

Standard cable is included in evaluation kit. Crossover cable is included in evaluation kit.

Ethernet

Connector

PC Ethernet

Router/

Switch

Wall Outlet

Ethernet

Cable

Ethernet

Cable Ethernet

Connector

CP2201EB

Ethernet

Connector

Ethernet Crossover Cable Ethernet

Connector

C2201EB

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