Freescale Semiconductor MCF51CN128 User manual

TCP/IP Applications Using the
MCF51CNFamily—Designer Reference
Manual
Device Supported: MCF51CN Microcontrollers
Document Number: DRM114
Rev. 0, 12/2009

TCP/IP Applications Using the MCF51CN Family—Designer Reference Manual, Rev. 0, 12/2009
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Contents
PageTitleSection Number
Chapter 1
Introduction
Overview...........................................................................................................................................................................51.1
Key Features.....................................................................................................................................................................51.2
Advantages........................................................................................................................................................................81.3
Development Tools...........................................................................................................................................................81.4
Top and Bottom View of the MCF51CN128 Reference Design Hardware......................................................................81.5
How the MCF51CN128 Reference Design FitsYour System..........................................................................................91.6
Chapter 2
Hardware Description
Hardware.........................................................................................................................................................................132.1
Minimal System Features...............................................................................................................................................132.2
Demo System Features...................................................................................................................................................142.3
Connection Between Minimal System and Demo System Features...............................................................................152.4
Hardware Block Diagram...............................................................................................................................................162.5
Pinout Description..........................................................................................................................................................182.6
MCF51CN128 Reference Design Board Power Options...............................................................................................192.7
Hardware Considerations................................................................................................................................................202.8
Chapter 3
Firmware Description
Firmware.........................................................................................................................................................................213.1
Firmware Organization...................................................................................................................................................213.2
Block Diagram................................................................................................................................................................223.3
System Startup................................................................................................................................................................233.4
Internal Functionality of Socket Layer...........................................................................................................................243.5
Chapter 4
System Setup
Getting Started................................................................................................................................................................274.1
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PageTitleSection Number
Install Software...............................................................................................................................................................274.2
Hardware Setup...............................................................................................................................................................274.3
HTTP Server Functionality.........................................................................................................................284.3.1
Email Client Functionality..........................................................................................................................314.3.2
FTP Server Functionality.............................................................................................................................324.3.3
Serial Bridge Functionality..........................................................................................................................344.3.4
Principle of Operation.....................................................................................................................................................354.4
Serial Configuration Commands....................................................................................................................................364.5
Support............................................................................................................................................................................394.6
Appendix A
Additional Files...............................................................................................................................................................41A.1
Appendix B
Bill of Materials (BOM).................................................................................................................................................43B.1
Appendix C
Schematics......................................................................................................................................................................47C.1
TCP/IP Applications Using the MCF51CN Family—Designer Reference Manual, Rev. 0, 12/2009
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Chapter 1
Introduction
1.1 Overview
This reference manual describes using the MCF51CN128 reference design hardware
to run the following TCP/IP applications:
•SCI/SPI to Ethernet
•Web Server
•Email Client
•FTP Server
All hardware schematics diagram, gerber files,Allegro hardware source files, board pictures,
and firmware source codes are available in reference materials.All hardware files and
software can be reused to enable directly TCP/IP connectivity in customized applications.
For details about the technical implementation of the reference design main features, refer
to the following documents:
•Application note titled Serial-to-Ethernet Bridge Using MCF51CN Family and
FreeRTOS (document AN3906)
•Application note titled Web Server Using MCF51CN Family and FreeRTOS (document
AN3928)
•Application note titled Email Client Using MCF51CN Family and FreeRTOS (document
AN3930)
•Application note titled FTP Server Using MCF51CN Family and FreeRTOS (document
AN3931)
1.2 Key Features
•Uses Freescale ColdFire V1 Core MCF51CN128 48-pin QFN package running up
to 50.33 MHz
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•Low cost board in a minimal size of 2.89’’× 1.55’’. Ethernet Minimal System is 1.15’’
× 1.55’’.
•For the MCF51CN128 reference design hardware, power can be applied to both unused
pairs from the RJ45 cable. Therefore, power through the jack is not required. For more
details go to Section 2.7.
•The following TCP/IP services are implemented.
DHCP Client Service:•IP dynamic address (DHCP) or static support at runtime•
•Serial Bridge
A UART or SPI to Ethernet bridge is implemented using the socket approach.•
•Supports client or server implementation that allows connecting two serial
bridges using the Internet.
•An always enabled web page can configure all interfaces and bridge settings.
A reset command can be sent through the web page to make settings take effect.
•The following settings can be changed or shown at runtime through the
configuration web page or at compile time:
•MAC address
•IP address
•IP mask address
•IP gateway address
•Server address to connect as a client
•Static or dynamic IP address
•TCP port to connect or bind to
•TCP client or server implementation
•Configuration or bridge implementation
•UART port
•UART baudrate
•UART parity
•UART number of bits
•UART number of stop bits
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Key Features

•UART flow control
•SPI port
•SPI baudrate
•SPI polarity
•SPI phase
•SPI master or slave
•SPI polling or interrupt handling
•Using hardware and software flow control for the RS232 interface
•Presence of RS485 transceiver and connector
•The bridge can be configured through the UART interface using a set of
commands explained in Section 4.5
•For the MCF51CN128 reference design hardware, power can be applied to pin
6 of the UART connector. Therefore, the power jack is not required. Refer to
Figure 2-5 for more details.
•An accelerometer by SPI is on-board to test SPI bridge.
•HTTP Server Service
•Supports HTTP with the following services:
•HTTP 2.0—Persistent connections or keep-alive sessions
•SSI—Server side include (SSI) directives
•AJAX—Used to give the illusion that a web page changes without
refreshing it
•FORMS (POST request)
•CGI—(POST request) common gateway interface support
•Tasks status though a web page
•Email Client Service
•Assigned IP is sent via email if the dynamic IP is used.
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Chapter 1 Introduction

•FTP Server Service
•Stores information using FAT and then makes it accessible using FTP
•FTP is mounted over an SD card reader
1.3 Advantages
•The MCF51CN128 is a low cost MCU that can enable Ethernet/TCP/IP connectivity
to any embedded design.
•Software source codes are available to directly use in a customer application. It also
allows customer changes or customizations.
•Hardware files are provided for free. If a change in hardware is required for a customized
design, hardware source files can be edited.
•The MCF51CN128 MCU can obtain power from connectors like the RJ45 and DB9.
•For support enter a service request at, www.freescale.com/support.
1.4 DevelopmentTools
•CodeWarrior V6.2.1 is used to download the software application.
•A proper Ethernet cable must be selected depending on the Ethernet element that is the
PC, hub, switch, or router.
1.5 Top and BottomView of the MCF51CN128 Reference Design
Hardware
The following figures describe the top and bottom view of the board. A hardware block
diagram is shown in Figure 2-2. For details about components, go to Sections 2.2 and Section
2.3.
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Advantages

Figure 1-1.Top view of MCF51CN128 reference design hardware
Figure 1-2. Bottom view of MCF51CN128 reference design hardware
1.6 How the MCF51CN128 Reference Design FitsYour System
The following figures show how the system fits into some TPC/IP applications. Specific
features are explained in the Section Firmware. The figures show reference design squared
by a red box.
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Chapter 1 Introduction

Figure 1-3. Serial bridge in Bridge mode
Figure 1-4. Serial bridge in Configuration mode
Figure 1-5.Web server implemented at MCF51CN family providing HTTP services, one
client at a time
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How the MCF51CN128 Reference Design FitsYour System