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FA1 i.MX27 implementation + LTIB

This course describes the i.MX27 multimedia processor and Linux Target Image Builder tool

formateur
Objectives
  • The course details the hardware implementation of the i.MX27 microcontroller.
  • The boot sequence and the clocking are explained.
  • The course explains all parameters that affect the performance of the system in order to easily perform the final tuning.
  • A description of all internal peripherals is provided.
  • An overview of the ARM926EJ-S core helps to understand issues caused by cache and MMU.
  • The course ends with practical labs explaining how to generate a Linux image as well as a Root File System, by using a tool called LTIB [Linux Target Image Builder].

  • This course has been delivered to several companies developing multimedia equipments.
A lot of programming examples have been developed by ACSYS to explain the boot sequence and the operation of complex peripherals.
•  They have been developed with GNU compiler and are executed under Lauterbach debugger.
•  Furthermore, a host desktop running Fedora Linux is used to generate Linux image and Root File System during labs on LTIB.
A more detailed course description is available on request at training@ac6-training.com
Prerequisites
  • This course provides an overview of the ARM926 core. Our course reference cours R1 - ARM7/9 implementation details the operation of this core.
  • The following courses could be of interest:

ARCHITECTURE OF i.MX27
Overview
  • ARM core based architecture
  • Clarifying the internal data paths
  • Highlighting the purpose of the 2 central interconnect units : MAX and M3IF
  • Organization of a board based on i.MX27
  • Mapping
CORE PLATFORM
THE ARM926EJ-S CORE
  • Presentation of the core
  • Operating modes
  • Pipeline
  • ARM vs Thumb instruction sets, interworking
  • Branch instructions
  • C-to-Assembly interface
  • Exception mechanism
  • Debug facilities
THE ARM9 PLATFORM
  • AHB slave device latencies
  • MAX parameterizing
  • ARM Interrupt Controller [AITC]
HARDWARE IMPLEMENTATION
RESET AND CLOCKING
  • Clock distribution
  • Power-up sequence
  • Low power modes, clock gating
  • System boot mode selection
  • Bootstrap mode operation
SYSTEM CONTROL
  • GPIO module
  • General Purpose Input interrupt request capability
  • Signal description
ACCESSING EXTERNAL MEMORIES
  • Description of the Master Arbitration and Buffering [MAB] unit
  • Description of the M3IF arbitration [M3A]
  • Enhanced DDR SDRAM controller
  • NAND flash controller, boot from flash
  • Programming the chip-selects
STANDARD PARALLEL INTERFACES
    • ATA controller
  • PIO mode
  • Ultra DMA mode
  • FIFO receive and FIFO transmit alarms
    • MSHC
  • Transfer protocol
  • Error management
    • SDHC
  • Interface to SD cards
  • Transfer protocol
  • Error management
MULTIMEDIA UNITS
DMA CONTROLLER
  • Channel priority definition
  • Burst length definition
  • 2D memory transfers
  • Double-buffering mechanism enabling chained transfers
VIDEO PROCESSING UNITS
    • Video acquisition
  • CSI interface
  • Configuring the interface to support CCIR656
    • Video pre-processor
  • Image resizing
  • Color space conversion
    • Video post-processor
  • Deblock
  • Dering
  • Image resizing
  • Color space conversion
    • Video codec
  • MPEG-4 encoding / decoding
  • H.264 AVC encoding / decoding
AUDIO RELATED INTERFACES
    • SSI interfaces
  • Connection of Codecs or DSPs
  • AC97 support
    • Digital audio multiplexor
  • Connecting host interfaces to peripheral interfaces
  • Internal network mode
SECURITY MODULES
    • Security Controller
    • SAHARA2 security coprocessor
  • Random number generator
  • Encryption / decryption sequences
    • Run-Time Integrity Checker
  • SHA-1 message authentication
  • Segmented data gathering
    • IC Identification Module
COMMUNICATION CONTROLLERS
    • 1-wire interface
    • Configurable SPI
  • SPI protocol basics
  • Master / slave operation
  • Transfer sequence
    • I2C interfaces
  • I2C protocol basics
  • Master vs slave
  • Transfer sequence
    • UART
  • IrDA modulation / demodulation
  • Support for Smart Card
  • Flow control
    • USB
  • Explaining what is OTG
  • High-speed operation
  • EHCI support
  • Full speed operation
  • Endpoint configuration
    • Fast Ethernet Controller [FEC]
  • Buffer management, based on Buffer Descriptors
  • Incoming frame filtering mechanisms
  • VLAN support
LCD CONTROL
    • LCDC
  • LCD screen format
  • Standard panel interface for common LCD drivers
  • Graphic window on screen
    • SLCDC
  • Interface to an external display controller
  • Transferring images and controls from DDR to the external controller
LTIB
GENERATING THE LINUX KERNEL IMAGE
  • What is required on the host before installing LTIB
  • Common package selection screen
  • Common target system configuration screen
  • Building a complete BSP with the default configurations
  • Creating a Root Filesystems image
  • Re-configuring the kernel under LTIB
  • Selecting user-space packages
  • Setup the bootloader arguments to use the exported RFS
  • Debugging Uboot and the kernel by using Trace32
  • Adding a new package
  • Other deployment methods
  • Creating a new package and integrating it into LTIB