1 / 12

Controller Interface D evice

Controller Interface D evice. Jacob Preston ECE 404 NIATT – Dr. Ahmed Abdel- Rahim. Objectives. Update parallel interface to SDLC Respond to traffic controller requests Emulate Malfunction Management Unit, Detector Rack, and Terminals and Facilities

genna
Download Presentation

Controller Interface D evice

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Controller Interface Device Jacob Preston ECE 404 NIATT – Dr. Ahmed Abdel-Rahim

  2. Objectives • Update parallel interface to SDLC • Respond to traffic controller requests • Emulate Malfunction Management Unit, Detector Rack, and Terminals and Facilities • Ethernet communication with PC for use with VISSIM software

  3. Traffic Controller Messages • SDLC Frames (packets) defined in NEMA TS 2 Standard • Command messages (from traffic controller) • Type 0 : MMU Load Switch Drivers (?) • Type 1 : MMU Inputs/Status request • Type 3 : MMU Programming request (?) • Type 10 : TF Outputs/Inputs request • Type 20 : DR Call Data request

  4. Emulated Response Messages • Type 128 : MMU Type 0 ACK (?) • Type 129 : MMU Inputs/Status Type 1 ACK • Type 131 : MMU programming Type 3 ACK (?) • Type 138 : TF Inputs Type 10 ACK • Type 148 : DR Call Data Type 20 ACK

  5. CID Block Diagram CID

  6. SDLC Packets • Opening flag : 0x7E • Address • Control : 0x83 • Variable length information (depending on message type) • 16 bit CRC (MSB first) • Closing flag : 0x73 • 0 bit insertion after 5 consecutive binary 1s

  7. CPLD Internal Block Diagram (SDLC)

  8. Example Simulation: Type 1 Command

  9. Issues Encountered • CRC bit order and inversion • CRC passes if receiver decodes 0xF0B8 • Decoding different packets • Sending SDLC Messages • Variable length messages being sent • Check for transmit of closing flag

  10. Proposed Ethernet/SPI Interface

  11. Continuing work • Summer opportunity • Ethernet Interface

  12. Questions?

More Related