Difference between revisions of "Ethernet Module"
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==Ethernet Application== | ==Ethernet Application== | ||
| − | ===DHCP=== | + | ===DHCP Client=== |
| + | *To be added. | ||
===Web Server=== | ===Web Server=== | ||
| + | *To be added. | ||
| + | |||
| + | |||
| + | ==SNMP Agent== | ||
| + | *Simple Network Management Protocol (SNMP) is a standard protocol to access variables to remote device via the Internet. | ||
| + | *It belongs to the Application Layer, as in HTTP. | ||
| + | *If a device is SNMP compatible, any SNMP compatible host system can monitor and control that device. | ||
| + | |||
| + | ===Components in a SNMP System=== | ||
| + | *Network Management Station (NMS) | ||
| + | **This is a client, initiating SNMP communication. | ||
| + | **This can be a PC with an NMS software, polling data from the SNMP agents periodically. | ||
| + | *SNMP Agents | ||
| + | **These are servers, responding to one or multiple NMS requests. | ||
| + | *Management Information Base (MIB) | ||
| + | **A special collection of variables managed by the SNMP agents. | ||
Revision as of 21:06, 15 August 2007
Contents
Introduction
- This project aims to develop an Ethernet Module, to be used in conjunction with a 8/16 bits embedded system such as the dsPic33F development board.
- The entire Ethernet Module consists of:
Useful Links
DM9000A
- DM9000A Description
- DM9000A Datasheet
- Application Circuit
- Layout Guidelines
- Application Note
- DM9000A Official Drivers
uIP
lwIP
HTML
- W3 Schools: Learning how to write HTML and JavaScript
- Nvu: Open source HTML Editor
SNMP
Hardware
Component List
| Special Item | Description | Quantity |
|---|---|---|
| DM9000AEP | Ethernet Controller | 1 |
| HR911102A | RJ45 Connector with Integrated Magnetics for 10/100 Base-TX | 1 |
| 93LC46B-I/SN | 1K Serial EEPROM | 1 (Optional) |
| 25MHz Crystal | Crystal | 1 |
| 22pF | For Crystal Use | 2 |
| 220uF | For RXVDD25/TXVDD25 | 1 |
| 49.9ohm | For RX+/RX-/TX+/TX- | 4 |
| 6.8kohm | For BGRES/BGGND | 1 |
| 510ohm | For LEDs | 2 |
Circuit and PCB
in gEDA format and its gEDA sym and footprints
Software Driver
- Download here
- Base on FreeRTOS and dsPIC33 platform
- Using POSIX-like API:
- int dmfe_open(int flags): initialize the Ethernet controller for 10MHz Half-Duplex
- int dmfe_close(): turn off the PHY layer
- int dmfe_read(void): copy a packet to the default buffer
- int dmfe_write(unsigned char device, unsigned char *buf, int count): copy count bytes of the data from buf and transmit
- void dmfe_interrupt(void): process the transmit interrupt from DM9000A
TCP/IP Stack
- uIP and lwIP are light weight TCP/IP Stack designed for 8-bit/16-bit embedded systems.
uIP
- Develped by Adam Dunkels of the Networked Embedded Systems group at the Swedish Institute of Computer Science.
- uIP is under the BSD-style license
lwIP
- lwIP is a small independent implementation of uIP.
- It is more powerful than uIP but requires more memory.
- lwIP is under the Modified BSD License
Ethernet Application
DHCP Client
- To be added.
Web Server
- To be added.
SNMP Agent
- Simple Network Management Protocol (SNMP) is a standard protocol to access variables to remote device via the Internet.
- It belongs to the Application Layer, as in HTTP.
- If a device is SNMP compatible, any SNMP compatible host system can monitor and control that device.
Components in a SNMP System
- Network Management Station (NMS)
- This is a client, initiating SNMP communication.
- This can be a PC with an NMS software, polling data from the SNMP agents periodically.
- SNMP Agents
- These are servers, responding to one or multiple NMS requests.
- Management Information Base (MIB)
- A special collection of variables managed by the SNMP agents.
