1 / 6

Implementing Context Aware Applications

Implementing Context Aware Applications. Class 5. Agenda. Review of TinyOS execution model Tutorial on TinyOS Code walk through Code quiz Assignment 2. msg_rec(type, data). msg_send_done). Tiny OS Concepts. Events. Commands. Scheduler + Graph of Components

lavina
Download Presentation

Implementing Context Aware Applications

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. Implementing Context Aware Applications Class 5

  2. Agenda Review of TinyOS execution model Tutorial on TinyOS Code walk through Code quiz Assignment 2

  3. msg_rec(type, data) msg_send_done) Tiny OS Concepts Events Commands • Scheduler + Graph of Components • constrained two-level scheduling model: threads + events • Component: • Commands, • Event Handlers • Frame (storage) • Tasks (concurrency) • Constrained Storage Model • frame per component, shared stack, no heap • Very lean multithreading • Efficient Layering send_msg(addr, type, data) power(mode) init Messaging Component internal thread Internal State TX_packet(buf) Power(mode) init RX_packet_done (buffer) TX_packet_done (success)

  4. Radio Packet packet Radio byte byte RFM bit TOS Execution Model data processing application comp • commands request action • ack/nack at every boundary • call cmd or post task • events notify occurrence • HW intrpt at lowest level • may signal events • call cmds • post tasks • Tasks provide logical concurrency • preempted by events • Migration of HW/SW boundary message-event driven active message event-driven packet-pump crc event-driven byte-pump encode/decode event-driven bit-pump

  5. Cross-platform applications Platform-specific applications Platform-specific applications Platform-independent hardware interface Hardware independence HIL 1 HIL 2 HIL 3 HIL 4 HAL 1 HAL 2 HAL 3 HAL 4 HPL 2 HPL 1 HPL 3 HPL 4 HW/SW boundary HW platform 1 HW platform 2 HW platform 3 HW platform 4 Hardware Abstraction Architecture for TinyOS 2.x Combine the component model with aflexible, three-tier organization of the hardware abstraction

  6. TinyOS Tutorial

More Related