Supervisor: Fearghal Morgan Analog Devices: Ray Carter Dept. Electronic Engineering NUIG 23 April 2008 Software Driver for ADV7800 Video Decoder Nóirín.

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Presentation transcript:

Supervisor: Fearghal Morgan Analog Devices: Ray Carter Dept. Electronic Engineering NUIG 23 April 2008 Software Driver for ADV7800 Video Decoder Nóirín Duggan

Project Outline 3 Software Driver for ADV7800 Video Decoder Nóirín Duggan Dept. Electronic Engineering NUIG -> Project Outline -> The software driver system -> Implementation -> Challenges -> Outcome Format of Presentation

Software Driver for ADV7800 Video Decoder Nóirín Duggan Dept. Electronic Engineering NUIG Project Outline

3 Software Driver for ADV7800 Video Decoder Nóirín Duggan Dept. Electronic Engineering NUIG The aim of this project was to create a basic operational software driver for the Standard Definition core of the ADV7800 Analog Devices video decoder which would dynamically configure the device when a CVBS or SVideo input is detected. The driver had to be clear, concise and portable allowing the end user to interact with the decoder without needing detailed knowledge of the part. Project Outline

Software Driver for ADV7800 Video Decoder Nóirín Duggan Dept. Electronic Engineering NUIG The Software Driver System

Software Driver for ADV7800 Video Decoder Nóirín Duggan Dept. Electronic Engineering NUIG The Software Driver System 6 The hardware elements of the System

Software Driver for ADV7800 Video Decoder Nóirín Duggan Dept. Electronic Engineering NUIG The Software Driver System 7 Software Driver System

Software Driver for ADV7800 Video Decoder Nóirín Duggan Dept. Electronic Engineering NUIG The Software Driver System 8 User Interaction Model

Software Driver for ADV7800 Video Decoder Nóirín Duggan Dept. Electronic Engineering NUIG The Software Driver System 9 Main Loop of System

Software Driver for ADV7800 Video Decoder Nóirín Duggan Dept. Electronic Engineering NUIG The Software Driver System 10 Application System Controller -> Layer 0

Software Driver for ADV7800 Video Decoder Nóirín Duggan Dept. Electronic Engineering NUIG The Software Driver System 11 Application Initialiser

Software Driver for ADV7800 Video Decoder Nóirín Duggan Dept. Electronic Engineering NUIG The Software Driver System 12 Flow of Control

Software Driver for ADV7800 Video Decoder Nóirín Duggan Dept. Electronic Engineering NUIG The Software Driver System 13 Application Main

Software Driver for ADV7800 Video Decoder Nóirín Duggan Dept. Electronic Engineering NUIG The Software Driver System 14 Software Driver Handler Functions Software Driver Interrupt handler Called by application, reads status of standard definition video detect register, if set sets video state machine to video detected Video Handler Called by application, reads value of video state machine if valid video detected it retrieves standard identification from the decoder and passes it to application

Software Driver for ADV7800 Video Decoder Nóirín Duggan Dept. Electronic Engineering NUIG The Software Driver System 15 Application Video Handler

Software Driver for ADV7800 Video Decoder Nóirín Duggan Dept. Electronic Engineering NUIG The Software Driver System 16 Graphical User Interface

Software Driver for ADV7800 Video Decoder Nóirín Duggan Dept. Electronic Engineering NUIG Implementation Methodology

Software Driver for ADV7800 Video Decoder Nóirín Duggan Dept. Electronic Engineering NUIG Implementation Methodology 18 General Strategy for implementation Disassemble the project into its constituent subsystems Solve individually Glue together

Software Driver for ADV7800 Video Decoder Nóirín Duggan Dept. Electronic Engineering NUIG Implementation Methodology 19 General Strategy for implementation Disassemble the project into its constituent blocks Solve individually Glue together What were the subsystems?

Software Driver for ADV7800 Video Decoder Nóirín Duggan Dept. Electronic Engineering NUIG Implementation Methodology 20 The blocks of the System

Software Driver for ADV7800 Video Decoder Nóirín Duggan Dept. Electronic Engineering NUIG Implementation Methodology 21 Mini Driver 1.0

Software Driver for ADV7800 Video Decoder Nóirín Duggan Dept. Electronic Engineering NUIG Implementation Methodology 22 Mini Driver 2.0

Software Driver for ADV7800 Video Decoder Nóirín Duggan Dept. Electronic Engineering NUIG Implementation Methodology 23 SD driver 1.0

Software Driver for ADV7800 Video Decoder Nóirín Duggan Dept. Electronic Engineering NUIG Implementation Methodology 24 SD driver 2.0

Software Driver for ADV7800 Video Decoder Nóirín Duggan Dept. Electronic Engineering NUIG Implementation Methodology 25 Implementation Methodology Successful Strategy?

Software Driver for ADV7800 Video Decoder Nóirín Duggan Dept. Electronic Engineering NUIG Challenges

Software Driver for ADV7800 Video Decoder Nóirín Duggan Dept. Electronic Engineering NUIG Challenges 27 Challenges No previous experience of either embedded system design/EDK tools or microblaze

Software Driver for ADV7800 Video Decoder Nóirín Duggan Dept. Electronic Engineering NUIG Challenges 28 Challenges No previous experience of either embedded system design/EDK tools or microblaze Limited knowledge of ADV7800 video decoder

Software Driver for ADV7800 Video Decoder Nóirín Duggan Dept. Electronic Engineering NUIG Challenges 29 Challenges No previous experience of either embedded system design/EDK tools or microblaze Limited knowledge of ADV7800 video decoder Limited experience of large software projects/device drivers/C programming

Software Driver for ADV7800 Video Decoder Nóirín Duggan Dept. Electronic Engineering NUIG Challenges 30 Understanding the structure of the Driver

Software Driver for ADV7800 Video Decoder Nóirín Duggan Dept. Electronic Engineering NUIG Summary of Achievements

Software Driver for ADV7800 Video Decoder Nóirín Duggan Dept. Electronic Engineering NUIG Summary of Achievements 31 Summary of Achievements Completed the spec

Software Driver for ADV7800 Video Decoder Nóirín Duggan Dept. Electronic Engineering NUIG Summary of Achievements 32 Summary of Achievements Completed the spec Learned how to use Xilinx tools to create a microblaze soft core processor

Software Driver for ADV7800 Video Decoder Nóirín Duggan Dept. Electronic Engineering NUIG Summary of Achievements 33 Summary of Achievements Completed the spec Learned how to use Xilinx tools to create a microblaze soft core processor Combined this with software element to create a viable embedded system for a real world application

Software Driver for ADV7800 Video Decoder Nóirín Duggan Dept. Electronic Engineering NUIG Summary of Achievements 34 Summary of Achievements Completed the spec Learned how to use Xilinx tools to create a microblaze soft core processor Combined this with software element to create a viable embedded system Learned about software development i.e. creating reusable, portable projects

Software Driver for ADV7800 Video Decoder Nóirín Duggan Dept. Electronic Engineering NUIG Conclusion