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IR Communication

IR Communication. Performed by: Shahaf Yaron Ezra Ehud Vardi Instructor: Boaz Mizrachi. Overview. Project Goals Mechanical design Development stages- problems and solutions Communication protocol Demo Summery and conclusions. Project Goals. Mechanical design

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IR Communication

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  1. IRCommunication Performed by: ShahafYaron Ezra Ehud Vardi Instructor: Boaz Mizrachi

  2. Overview • Project Goals • Mechanical design • Development stages- problems and solutions • Communication protocol • Demo • Summery and conclusions

  3. Project Goals • Mechanical design • Learning PIC24F & MPLAB • IR Communication PIC-PC • PC Application on Windows platform

  4. Mechanical Design • Design with Google SkecthUp. • Design resolution: 1 mm. • Design by the component's datasheets. • Most of the design effort – Z axis. • PIC in the center of PCB. • Mockup generated from the design. Mockup

  5. Large enclosure – Z axis Small enclosure – Z axis

  6. Development StagesStage 1: PIC – PC via USB-IR dongle • Chosen Implementation: • IrCOMM 9-wired-cooked protocol • Microchip stack • PC with USB-IR dongle • Software based on MSDN libraries

  7. Stage 2: PC – PC via USB-IR dongle • Step of debugging: • Establish connection and sending file successfully • Analyze all the structs that being transferred • Compare the PC-PC structs to the PC-PICstructs

  8. Development StagesStage 3: PIC – PC via PDA with IrCOMM • Chosen Implementation: • IrCOMM 9-wired-cooked protocol at first 3-wire latter • Microchip stack • PDA as USB-IR dongle

  9. Development StagesStage 4: PIC – PC via PDA with UART-IrDA • Chosen Implementation: • UART –IrDA protocol • PDA as USB-IR dongle

  10. Protocol Properties • UART 8-N-1 IrDA • Stop&Wait , P2P • CRC-CCITT – hardware implementation • Fixed Packet Size :60 bytes • Effective BaudRate : ~8500 [bit/sec] • Exclude : CRC,ack/nck Packet structure

  11. Supported Commands

  12. Sequence Diagram: PDA (server)

  13. Sequence Diagram : PC (client)

  14. Presentation • GUI • API • Noises and disruptions • Results

  15. Summery & Conclusions • From idea to implementation • HW and SW integration • Alternative ways to solve problems • Good practice for the “Real World” • Never give up !

  16. Appendix

  17. Communication Packets

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