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HX4 Xilinx - Microblaze implementation

This course explains how to design a SoC based on MicroBlaze, Xilinx proprietary IPs and/or custom IPs using EDK

formateur
Objectives
  • The course describes how to build a complete Embedded System based on MicroBlaze Xilinx Processor
  • Microblaze Implementation and Embedded Development Kit (EDK) with Xilinx Platform Studio (XPS) and Software Development Kit (SDK) tools are described to create a hardware platform and the software to execute to program it
  • Xilinx Simulation tools are presented to debug Software and Hardware
  • Impact utility is described to flash the bitstream
  • Chipscope Pro is also used in order to display on-chip AXI transactions

Environment
  • A PC in pairs
  • Xilinx ISE Design Suite v.14.7 IDE / Xilinx Vivado v.2013.4 IDE
  • Nexys-3 (Xilinx Spartan6-based) board / Nexys-4 (Xilinx Artix7-based) board
  • Training manuals are provided
Pre-requisites
  • Basic knowledge on processor and FPGA technology
  • Knowledge of VHDL and C languages

STARTING WITH A SIMPLE "HELLO WORLD" PROJECT
  • Tools Introduction :
    • ISE Design Suite
    • EDK
  • Development flow introduction
    • Hardware Development
    • Software Development
    • Verification (Simulation and Debug)
    • Flashing with Impact
Exercise :  Creating the Hardware and Software to send strings on a serial port
LOGICORE IP MICROBLAZE (MCS)
  • Microcontroller system
    • Features
    • Overview
    • Designing with the core
  • Microblaze architecture overview
    • Core block overview
    • Introduction and configurable features
    • Data type and Endianness
    • Register Bank (General Purpose Registers and Special Registers)
    • Pipeline
    • Branches
    • Privilege Modes
    • Hardware Exception
    • Breaks
    • Interrupts
    • Vector Table
    • Floating Point Unit
    • Caches and MMU Overview
    • Debug
    • MicroBlaze ABI
  • MicroBlaze Interface Overview
    • MicroBlaze I/O Overview
    • AXI4 bus, AXI-Lite
    • AXI-Stream
    • PLB (Peripheral Local Bus)
    • LMB (Local Memory Bus)
    • FSL (Fast Simplex Link Interface)
    • XCL (Xilinx CacheLink Interface)
    • Debug Interface
    • MicroBlaze Core Configurability
Exercise :  Looking at the MicroBlaze core configuration wizard
Exercise :  Area size analysis on different systems (with/without caches, AXI/PLB)
HARDWARE DESIGN - XILINX PLATFORM STUDIO (XPS)
  • Introduction
  • Platgen
  • Simgen
    • Generating the Simulation Models and the Testbench
    • Loading an application
  • XPS Interface Description
  • MHS, MPD, PAO files Description
  • Accessing peripheral information (Datasheet, MPD, etc.)
  • Bus and Periphral Connexion
  • Peripheral definition files
  • Platgen tool
Exercise :  Enhancing the "Hello World" Platform (Adding Interrupt Controller, Timer, GPIO, RAM)
•  Working with bus interfaces, Ports and Memory mapping
Exercise :  Simulating the platform with ISim through ISE Project Navigator
•  Analysing the Instruction fetching on the Instruction AXI bus
SOFTWARE DESIGN - SOFTWARE DEVELOPMENT KIT (SDK)
  • Introduction
  • Libgen
  • Scanned repositories for software component
  • Startup
  • Linker Script
  • MSS, MLD, MDD files description
  • Board Support Package Specification
  • Using Xilinx IP Drivers
  • Interrupt Management
  • Block RAM initialization (Data2Mem)
  • Debugging (Memory, Registers, Disassembly views, etc.)
  • Generating the Linker Script (Placing Code and Data in different memories)
  • Executing the application from an External DDR3 Memory (using a bootloader)
  • Profiling
    • Rebuilding the application and the BSP with the correct compiler flags to use profiling
Exercise :  Developing the software for the hardware platform created with XPS
•  Timer Implementation
•  Interrupt management
•  Creating a Blinky
•  Generating Interrupts from GPIOs
•  Placing the application code/data in different memories
•  Using Profiling
CUSTOM PERIPHERAL (IP) CREATION AND INSERTION
  • Create or Import Peripheral (CIP) Wizard Introduction
  • LogiCORE IP AXI Lite IPIF to connect a slave peripheral on the bus
  • Creating HDL and MPD templates through XPS
  • Directory Structure generated
  • IP development and Simulation through ISE
    • Developing a user IP and a testbench
    • Understanding how to create software registers (memory mapped)
    • Simulating the IP
  • Importing a Custom IP to XPS
  • Connecting a Slave IP on the AXI-Lite Bus
Exercise :  Developing and Simulating a custom IP (controlling LED intensity with a PWM) through ISE
Exercise :  Using the CIP wizard to implement this user IP into our platform (SoC)
Exercise :  Developing the software application to program the IP through SDK
CHIPSCOPE - HARDWARE DEBUG
  • Introduction to Chipscope Pro
  • Implementing an AXI monitor into the design to analyze AXI4-Lite Bus transactions
  • Retrieving the on-chip signals waveforms using Chipscope Pro Analyzer
  • Clarifying trigger conditions
Exercise :  Connecting a Chipscope Analyzer to the AXI bus on our custom IP side and, using it to measure bandwidths