Ethernet Digital IO Module

Objective • To design and assemble a prototype for an “Ethernet Digital I/O module” • The module should be capable to • Receive commands over Ethernet from PCs • Validates the commands • Execute the commands (trigger digital outputs) • Notify a remote PC of received events (inputs) • Log the executed commands on a remote PC log file The module should support the following • Protocols IP, ICMP, UDP, TCP, DHCP • DHCP, to obtain IP dynamically from DHCP server • Static IP setting, a PC can configure the module and set its IP to certain address • Ping reply, module should reply to ping commands • Remote reset, resets the module to its startup state • Logging of executed commands to a predefined socket server • In circuit programming, microcontroller should be programmed while in the circuit • 6 or more TTL level inputs • 12 or more TTL level outputs • RJ45 10MBit Ethernet interface • Status Leds to show its operation mode (power, transmission) • Troubleshooting Leds to be used for debugging (error code) • DC Power connector • In-Circuit Serial Programming (ICSP) Connector • Pin headers to interface to IO components (relays, switches, ..) Method of operation • Module starts, load its configuration from eeprom • Module awaits commands from PC or events on its input pins • Pc can send an output command to the module, followed by a checksum • Module verifies that this is a valid command (via CRC or similar) • Module execute the command by setting its TTL output • Module log the executed command to a predefined PC • If an input is triggered on one of the module inputs, then the module sends an event to PC • Module log the executed command to a predefined PC Constraints • Module size should be no larger than 10x15 CM • Module should be powered using a DC source, no larger than 12V 1Amp • Module cost should be less than $20 to manufacture (components prices) Deliverables • Schematics diagram, in one of the standard software packages formats • Layout diagram, in one of the standard software packages formats (max 2 PCB sides) • Components list, table in MS word file, showing component name, price, supplier • Microcontroller source file, code to be downloaded to microcontroller • Document, MS word, explaining the protocol used to send/receive commands • Tools to assemble/compile microcontroller code and burn it • Steps to test and validate the module, in MS word file • Steps to burn the micron roller code and install it to the microcontroller • PCB, with components soldered, functional prototype Project milestones • Agree on terms, cost • Start project • Deliver design documents • Approve design documents • Start execution • Deliver working PCB as prototype • Deliver remaining documents and software References [login to view URL] [login to view URL] [login to view URL]