| Sıra | DOSYA ADI | Format | Bağlantı |
|---|---|---|---|
| 01. | Package Native Package Software | ppt | Sunumu İndir |
Transkript
Beagle Board 101Gerald Coley and Jason KridnerOctober 26, 2008Embedded Systems Conference - Boston
Agenda Overview of the Beagle Board Board features and community Booting the Beagle Board OMAP3530 applications processor overview Building community and collaborating What, why, who, and how of open source Collaboration tools Community participation with Git Community participation with Open Embedded Managed, native, and web-based UI code development Conclusion Running demo images Resources for more information and support
What’s in a name…B ring your own peripheralsE ntry-level cost ($149)A rm Cortex-A8 (600MHz, superscaler)G raphics and DSP / Video accelerated L inux and open source communityE nvironment for software innovators
$149> 900 participants and growingOpen access to hardware documentationWikis, blogs, promotion of community activityFreesoftwareFreedom to innovatePersonally affordableActive & technical communityOpportunity to tinker and learnInstant access to >10 million lines of codeAddressing open source communityneedsTargeting community development
OMAP3530 Processor 600MHz Cortex-A8 NEON+VFPv3 16KB/16KB L1$ 256KB L2$ 430MHz C64x+ DSP 32K/32K L1$ 48K L1D 32K L2 PowerVR SGX GPU 64K on-chip RAMPOP Memory 128MB LPDDR RAM 256MB NAND flash USB Powered 2W maximum consumption OMAP is small % of that Many adapter options Car, wall, battery, solar, …Peripheral I/O DVI-D video out SD/MMC+ S-Video out USB 2.0 HS OTG I2C, I2S, SPI,MMC/SD JTAG Stereo in/out Alternate power RS-232 serial3”Fast, low power, flexible expansion
Peripheral I/O DVI-D video out SD/MMC+ S-Video out USB HS OTG I2C, I2S, SPI,MMC/SD JTAG Stereo in/out Alternate power RS-232 serial3”Other Features 4 LEDs USR0 USR1 PMU_STAT PWR 2 buttons USER RESET 4 boot sources SD/MMC NAND flash USB SerialOn-going collaboration at BeagleBoard.org Live chat via IRC for 24/7 community support Links to software projects to downloadAnd more…
Desktop developmentNote: Beagle Board can be powered fromthe alternate jack (as shown) or via USBStereo inSDPowerDVI-DUSBStereo out
Development on-the-goPower + IP over USBSerial Port
9Expand the Beagle BoardPhoto by Philip BalisterUSRPUSBSD2GBStereo outPower
Benefits of low power No fan for silent operation Enables use as a media hub Use a USB cable to power the board Avoid carrying an additional power supply Barrel connector power option Free USB OTG port for use as a host May use a USB-to-barrel-connector adapter
Benefits of USB 2.0 HS OTG Acts as a ‘device’ when connected to a PC Provides power to board Able to emulate a network connection Acts as a ‘host’ when connected to a hub Connect to almost endless number of USB peripherals Requires a mini-A to standard-A adapter cable• See http://BeagleBoard.org/hardware for sources
Benefits of boot options Boot from NAND, MMC/SD, serial, or USB Boot options all from OMAP3530 ROM User button Selects alternate boot source at boot• Default: NANDUSBserialMMC/SD• Button pressed: USBserialMMC/SDNAND Avoids “bricking” Reusable in applications Reset button Function may be altered with software
Verifying the hardware Code images, procedure, and sources are provided to verify the board functionality Links to the diagnostics found at http://BeagleBoard.org/support Includes bootloader, Linux kernel, and minimal file system for testing These sources act as examples for software developers
Typically useful peripherals Available from Digi-Key 5V power supply (T450-P5P-ND)• Frees USB port for use as a host Null-modem serial cable (AE9879-ND)• Useful for bootloader and boot console I/O HDMI-to-DVI-D cable (AE10260-ND)• Enables connection to digital monitors USB hub (DA-70227-ND)• Useful for adding USB peripherals Other Serial adapter from IDC10 to DB9• Needed for serial console Hardware specifications and recommended peripherals http://BeagleBoard.org/hardware RSS feed of newly verified peripherals http://feeds.feedburner.com/BeagleBoardPeripherals
Vehicle telematicsLinux/Firefox web add-on for the TV in the house SDR platform Speech recognition applicationsMedia centre Bachelor th s sHome security cameras and powered-curtainsPowerful nas with media server and transcoding capabilities Clutter & Qt development Port OKL4Port OpenMokoNo idea yet Mobile DTV tuner and rec iver Small linux home fileserverProcessing images and pattern recognitionHome monitoringNetworked digital signagePort Google-Android Port OpenWrtAutonomous robot Port xnuLCD picture frameLinux thin client Bluez and GUI using direct frame bufferingLow cost linux pc/gaming device Wearable computerVLC VideoLANCamera streaming application Audio processing Linux home fileserver Fanless multimedia/internet terminalLow-cost kiosk terminal I'm i terested to buy 2 to 10 rev-B boards (10 preferred ;) congratulations for your project and its spirit !Development platform for mobile VoIP phoneI'm not interested in waiti g for the platform to mature any longer. Let me know how to get hold of a b agleboard now. CMUcam-style applications S art homeAfter discu sing with my dev guys, I confirm I would like to order 20 beagleboardsAutonomous vehicles Project for masters degreeI'd like my students to design and build hardware and software to do for Linux w at TimeCapsule does for MacOS How do they get started?Community is ready!
How to get started, step #1Order via
Four primary user activities on site Buy a board Learn how to use existing projects Learn how to join or start a project Learn about the latest project news Plans for site Multi-lingual Wiki-like editing-through-web Keep website source open & leverage OpenID
Facilitates open source community Aggregates blogs and other important information for users Provide community chat for collaboration and answer exchange “Of, by, and for” community members Promotes community member activities OMAP3530 collaboration portal Focus project developments “upstream”• Establish long-term presence• Solved broadest set of problems Aggregate relevant project news “downstream”• Inform OMAP3530 users of the broader open source world• Avoid deluge of irrelevant information
Community projectshttp://beagleboard.org/project Ångström Linux Distribution Firefox 3.0, Epiphany-WebKit, etc. AbiWord, GIMP, etc. FFmpeg 720P-24 MPEG4 decode on ARM+NEON only Beagle SDR (low-power software defined radio) Windows Embedded for BeagleBoard Handheld.org’s Mojo Ubuntu port to ARM Android for Beagle Kernel and boot-loader development And growing…19
Chat, mail, forums, blogs, and wikis! All exist because they all solve different problems Chat allows you to know someone’s listening#beagle on irc.freenode.net Great for beginning “stupid” questions and rapid coordination Mail allows you to reach almost anyonehttp://groups.google.com/group/beagleboard Brings them into the conversation Provides you with a personal log on your computer Forums helps get the threads organizedhttps://community.ti.com/forums/32.aspx (minimal activity to avoid disrupting community critical mass) Blogs provide emphasis, filtering, and timelinesshttp://beagleboard.org/news Wikis enable inputs to become documentationhttp://eLinux.org/BeagleBoard and http://code.google.com/p/beagleboard/wiki
Booting the Beagle Board
Equipment at ESC-Boston For you to keep (see box) Beagle Board Rev. B5 SD Card • Configured using MontaVista Linux For you to use in the labs Hub: • Powered USB 2.0 HS Cables:• USB to Beagle power• Mini-A-plug to standard-A-socket• HDMI to DVI-D Montior• DVI-D USB peripherals• keyboard and mouse22SDPowerDVI-DUSBDesktop Computer Configuration
Out of the box… Beagle Board is meant to teach No Linux kernel or file system is typically provided• This allows for alternative file systems• It encourages others to provide solutions A boot-loader is provided for basic hardware tests• Tries to avoid people thinking the board is dead Boot-loader is not configured to boot from anywhere Serial connection is typical A little help to move the class along 20 “boot config” SD cards to be passed around the room Insert card, hold USER button, apply power, and release They take about a minute to reconfigure the flash• Follow instructions at the two queries (swap SD cards)• Completed when at the “Angstrom” login prompt23
Typical Beagle Board boot processhttp://www.ti.com/litv/pdf/sprufd6a ROM attempts to load boot image from 4 places Sequence of attempts depends if USER button pressed• Not-pressed: NANDUSBserialMMC/SD• Pressed: USBserialMMC/SDNAND X-Loader is loaded by the ROM X-loader (MLO) loads u-boot.bin directly Often simply from same media MMC/SD boot has formatting requirements• Boot partition must be marked bootable and be FAT• MLO must be the first file loaded into the directory tree• Deleted/renamed files in the root directory can disturb boot• Low-level format (Cylinders/Heads/Sectors) matters One existing modification tries MMC/SD before flash By default, programmed into the first partition on the flash (mtd0) By default, loads u-boot stored in the second partition (mtd1) U-boot loads kernel and passes bootargs Instructions typically stored in environment on flash (mtd2)• A default environment is stored in u-boot for when the flash isn’t programmed• Hack in the u-boot on the “boot config” cards alters this to read environment from SD Currently supports only a serial console• Possible to modify to support USB keyboard/mouse and DVI-D monitor Typically loads the kernel from flash (mtd3) or first partition (mmcblk0p1) Kernel mounts root file system based on bootargs24
The ESC boot modificationshttp://jkridner.s3.amazonaws.com/esc/readme.txt U-boot hackhttp://www.beagleboard.org/uploads/u-boot-omap3/ignorenv.txt Started with Steve Sakoman’s u-boot-omap3 sourcehttp://www.beagleboard.org/irclogs/index.php?date=2008-10-21http://www.sakoman.net/cgi-bin/gitweb.cgi?p=u-boot-omap3.git;a=summary In common/env_common.c, calls set_default_env();• Overwrites values read from non-volatile environment• Uses built-in values from include/configs/omap3_beagle.h In omap3_beagle.h, altered default environment• Enabled ‘autoscr’ command to execute scripts from memory• Configured bootcmd to automatically run ‘autoscr’– mmcinit;fatload mmc 0 801f0000 u-boot.img;autoscr 801f0000 Created multiple u-boot.img files with ‘mkubootcmd’• Files must be processed by u-boot tool called ‘mkimage’• ‘mkubootcmd’ is a shell script that calls ‘mkimage’• u-boot.img on the SD configures for NAND flash bootload25
ESC boot modifications continued Modified ramdisk.gz Started with Angstrom pre-built console imagehttp://ewi546.ewi.utwente.nl/~koen/Angstrom-console-image-glibc-ipk-2008.1-test-20080827-beagleboard.rootfs.tar.bz2 Converted to ramdisk image• dd if=/dev/zero of=ramdisk bs=1k count=32768• mkfs.ext2 ramdisk• mount -o loop ramdisk /mnt• pushd /mnt; tar -xvjf Angstrom….tar.bz2; popd• umount /mnt• gzip ramdisk Loaded multiple packages for manipulating the flash Executes /media/mmcblk0p1/boot.sh• Added /etc/init.d/boot_sh26
ESC boot modifications continued (2) boot.sh Initializes flash (/media/mtdblock4)• flash_eraseall /dev/mtd4• mkdir /empty; pushd /empty; mkfs.jffs2 -o /dev/mtd4; popd• mkdir /media/mtdblock4• mount -t jffs2 /dev/mtdblock4 /media/mtdblock4 Copy files off of the SD card onto the flash• cp -v /media/mmcblk0p1/* /media/mtdblock4• pushd /media/mtdblock4; tar -xvzf /media/mmcblk0p1/rootfs.tgz Modify provided SD card with MV Linux• Fix a couple of links that were left off by accident• Copy hacked u-boot.bin and commands to load from SD card27
Typical boot information locationsMethod USER Bootstrap U-Boot Env Vars Kernel Root Files1) SD MTD0 MTD1 MTD2 MMC0P1: uImageMMC0P22) NAND MTD0 MTD1 MTD2 MTD3 MTD43) Hackedu-boot.binPressed MMC0P1: MLOMMC0P1: u-boot.binMMC0P1: u-boot.imgMMC0P1: uImageMMC0P2RAMDISK from SDPressed MMC0P1: MLOMMC0P1:u-boot.binMMC0P1: u-boot.imgMMC0P1:uImageMMC0P1:ramdisk.gz1) bootargs: root=/dev/mmcblk0p2 rw rootwait rootdelay=1bootcmd: mmcinit;fatload mmc 0 80200000 uImage;bootm 802000002) bootargs: root=/dev/mtdblock4 rw rootfstype=jffs2bootcmd: nand read 80200000 280000 400000;bootm 802000003) bootargs: root=/dev/mmcblk0p2 rw rootwait rootdelay=1bootcmd: mmcinit;fatload mmc 0 80200000 uImage;bootm 802000004) bootargs:root=/dev/ram0 rw ramdisk_size=32768 initrd=0x81600000,32Mbootcmd: mmcinit;fatload mmc 0 80200000 uImage;fatload mmc 0 81600000 ramdisk.gz;bootm 80200000Common) bootargs: console=ttyS2,115200n8 console=tty0 nohz=off28
U-boot command summaryhttp://www.denx.de/wiki/DULG/Manual Basic commands help – provide the list of commands (varies by build) printenv – lists the contents of the current environment saveenv – writes the current environment to the flash setenv <variable> ‘string’ – sets environment variable MMC/SD mmcinit – initializes the MMC/SD card fatls mmc 0 – reads FAT directory on the first partition fatload mmc 0 <RAM addr> <filename> – load a file NAND nand unlock – enables writing to the NAND nand ecc <sw|hw> – configures ECC mode nand erase <start> <length> – erases portion of NAND flash nand read <RAM addr> <start> <length> – reads into RAM nand write <RAM addr> <start> <length> – writes from RAM Serial loadb <RAM addr> – reads into RAM via kermit file send29
What can the Beagle Board do?
Interface to the physical world…Power ManagementSignalConditioningTemperaturePressurePositionSpeedFlowHumiditySoundLightThe RealWorldAnalog SignalConversionto DigitalDigitalSignalConversionto AnalogSignalConditioningDigital Signal ProcessorInterfaceClocks & Timers
…and present within the virtual
Linux distributions Linux isn’t complete without a distribution OpenEmbedded, Ubuntu, Fedora, Android, Gentoo, and ARMedslack are possibilities for the Beagle boardKernelWindowing SystemCreativityToolsOfficeSuiteBrowser
Baseline projectsAvailable today GPL ARM GNU compiler collection version 2007q3 Code Sourcery Linux/Windows compiler for ARMv7/Thumb2 Free C6000 compiler version 6.0.x TI non-commercial Linux compiler for C64x+ GPL X-Loader version 1.41 (Loads U-Boot) Configure RAM and boot from NAND flash or MMC/SD (FAT32) “MLO” image for use with ROM boot-loader GPL U-Boot version 1.3.3 (Loads Linux kernel) Interact over UART and program flash Boot from UART, NAND, or MMC/SD (FAT32) Test UART, DVI-D, S-Video, audio out, NAND, and MMC/SD GPL Linux kernel version 2.6.22 for diagnostics UART, DVI-D, S-Video, ALSA audio, NAND, and MMC/SD
Baseline projectsPlanned by TI in future Free 2D/3D graphics libraries(Beta available today for OMAP35x EVM) OpenGL ES 1.1 and 2.0 (first to market) and OpenVG 1.0 Framebuffer and Kdrive (X11) support GPL in the kernel space Binaries object libraries Free DSP interface libraries Link for loading, messaging, etc.• GPL in the kernel space• GPL-compatible in user space Codec Engine for task location abstraction (RPC-like)• GPL-compatible interface DSP/BIOS RTOS and framework components for DSP
Possible projects predicted Development tools Programming: gcc for ARM Cortex-A8 or TI C64x+, Eclipse Utilities: DFU-util Kernel and drivers SDIO/USB WiFi, power management, WebCam, analog I/O Linux distribution ports Maemo, Gentoo, Debian, Android User mode applications Productivity: OpenOffice, Firefox Gaming: MAME, Quake3, 2nd Life Multimedia: Miro, gStreamer Education: Sugar (OLPC), Alice
More possible projects Signal processing algorithms Machine recognition, Audio/video codecs Weather/security monitors Signal processing tools Matlab integration, filter generation tools UI innovations 3D UI (Clutter, …) Embedded web services Java, Helma, JXTA, Facebook/OpenSocial plug-ins Server applications BeagleBoard.org
OMAP3530 applications processor
Cores Cortex A-8 with NEON™ CoprocessorC64x+ DSP-based and video accelerators 600 MHz / 430 MHz @ 1.35V 550 MHz / 400 MHz @ 1.27V 500 MHz / 360 MHz @ 1.2V 2D/3D Graphics Engine (PowerVR SGX) Up to 10M polygons per second Memory ARM: 16 kB I-Cache; 16 kB D-Cache; 256kB L2 TMS320C64x+ DSP and video accelerators L1 32kB Program Cache/32kB Data Cache + 48kB SRAM L2 64kB Program / Data Cache + 32 kB SRAM; 16 kB ROM On Chip: 64kB SRAM; 112kB ROM Package Highlights 12x12 mm, 0.4mm pitch, Package On PackageSamples now; production 4Q’08 16x16 mm 0.65 mm pitch. Via Channel Array Tech.Samples 2Q’08; production 4Q’08 Industrial temperature range supportedARM®Cortex™-A8CPUL3/L4 InterconnectC64x+™ DSP and video accelerators (3525/3530 only)PeripheralsProgram/Data StorageSystemI2Cx3Serial InterfacesDisplay SubsystemConnectivityMMC/SD/SDIOx3USBHost Controller x2USB 2.0 HSOTGControllerGPMCSDRCUARTx2UARTw/IRDAMcBSPx5McSPIx4TimersGP x12WDT x2Image PipeParallel I/FCamera I/F2D/3DGraphics(3515/3530 only)HDQ /1-wireOMAP35x Processor10 bit DACVideoEnc 10 bit DACLCDCont-rollerOMAP35x™ Processor Block Diagram
ARM® Cortex™-A8 Up to 600 MHz ARMv7 Architecture Thumb-2 MMU Enhancements In-Order, Dual-Issue, Superscalar Microprocessor Core NEON Multimedia Architecture Over 2x Performance of ARMv6 SIMD Supports Both Integer and Floating Point SIMD Jazelle RCT Execution Environment Architecture Dynamic Branch Prediction 95% Accurate Branch Target Address Cache • across industry benchmarks Global History Buffer 8-Entry Return Stack Embedded Trace Macrocell (ETM) Support Non-Invasive Debug ARM Cortex-A8 Memory Architecture: 16K-Byte Instruction Cache• 4-WaySet-Associative 16K-Byte Data Cache• 4-Way Set-Associative 256K-Byte L2 Cache
ARM Cores ComparisonARM Core ARM926 ARM1136 Cortex-A8Architecture Version V5 V6 V7Pipeline type In-order scalar In-order scalar In-order, dual-issue superscalarPipeline stages 5 8 13ISA Efficiency (DMIPS/MHz) 1.07 1.18 2.05MMU Yes Yes YesTLB 8 entry unified 2 uTLB and LB 2x32 full assocCore to L1 interface 32 bit 64 bit 64 bit (256 Neon)L1 $ Set associativity 4 4 4Line length 32B 32B 64BBranch prediction No 128 entry BTB 512 entry BTBGeneral coprocessor I/F Yes Yes NoExternal Interface 2 AHB 2.0 5 AHB 2.5 – 3 x 64 bit, 2 x 32 bit 1 AXI – 64/128TrustZone Support No No YesNon-Cacheable Fill Buffer 4 word 8 word 16 wordJava support Jazelle DBX Jazelle DBX Jazelle RCTFloating Point / Media No (coprocessor available, VFP9)VFP11 attached, V6 Integer SIMD Neon Integer and FP SIMD, VFP Lite
C64x+™ DSP and Accelerators Up to 430 MHz (c64x+ DSP) Dedicated Enhanced Data Memory Access engine (EDMA) to move data to/from memories and peripherals external to the sub-system Video hardware accelerators MMU to access external address space (such as memory/peripheral) Advanced Very-Long-Instruction-Word TMS320C64x+™ DSP Core Eight Highly Independent Functional Units• Six ALUs (32-/40-Bit), Each Supports Single 32-Bit, Dual 16-Bit, or Quad 8-Bit Arithmetic per Clock Cycle• Two Multipliers Support Four 16 x 16-B Multiplies (32-Bit Results) per Clock Cycle or Eight 8 x 8-Bit Multiplies (16-B Results) per Clock Cycle 64 32-Bit General-Purpose Registers Instruction Packing Reduces Code Size C64x+ L1/L2 Memory Architecture 32K-Byte L1P Program RAM/Cache (Direct Mapped) 80K-Byte L1D Data RAM/Cache (2-Way Set-Associative) 64K-Byte L2 Unified Mapped RAM/Cache (4-Way Set-Associative) 32K-Byte L2 Shared SRAM and 16K-Byte L2 ROM C64x+ Instruction Set Features Byte-Addressable (8-/16-/32-/64-Bit Data) 8-Bit Overflow Protection“IVA” Subsystem32KB L1P Cache/RAM64KB L2 Cache/RAM32KB L1D Cache/RAM48KB L1D RAM32KB L2 RAMMMU64x+ DSPVideo HWAEDMA
PowerVR™ SGX Graphics Engine Up to ~111 MHz Tile Based Architecture with up to 10 MPoly/sec Universal Scalable Shader Engine: Multi-threaded Engine Incorporating Pixel and Vertex Shader Functionality Industry Standard API Support: OpenGLES 1.1 and 2.0 OpenVG1.0 Direct3D Mobile (TBD) Fine Grained Task Switching, Load Balancing, and Power Management Programmable High Quality Image Anti-Aliasing
Reflection & RefractionEnvironment Mapping & Per-Pixel lightingGraphics Capability ExamplesWave Physics
Display Subsystem (DSS) Parallel Digital Output Up to 24-Bit RGB HD Maximum Resolution Supports Up to 2 LCD Panels Support for Remote Frame Buffer Interface (RFBI) LCD Panels 2 10-Bit Digital-to-Analog Converters(DACs) Supporting: Composite NTSC/PAL Video Luma/Chroma Separate Video (S-Video) Rotation 90-, 180-, and 270-degrees Resize Images From 1/4x to 8x Color Space Converter 8-bit Alpha BlendingDisplay Subsystem10 bit DACVideoEnc 10 bit DACLCDCont-roller
ScalingPiPHW cursorOverlayDisplay Subsystem Examples
Camera Interface Subsystem (ISP) CCD and CMOS Imager Interface Memory Data Input RAW Data Interface BT.601/BT.656 Digital YCbCr 4:2:2 (8-/16-Bit) Interface A-Law Compression and Decompression Preview Engine for Real-Time Image Processing Glueless Interface to Common Video Decoders Histogram Module/Auto-Exposure, Auto-White Balance, and Auto-Focus Engine Resize Engine Resize Images From 1/4x to 4x Separate Horizontal/Vertical ControlGeneric parallel interface exampleNot connected on the Beagle Board
Timers 12 32-bit General Purpose Timers 2 32-bit Watchdog Timers 1 32-bit 32-kHz Sync Timer
SD / MMC, SDRC, and GPMC Interface SD / MMC / SDIO Three instantiations Compliant with CE-ATA and ATA for MMCA 1-bit or 4-bit transfer mode specifications for SD and SDIO cards 1-bit, 4-bit, or 8-bit transfer mode specifications for MMC cards General Purpose Memory Controller (GPMC) Controls all accesses to SRAM and Flash-type memory 8 Chip Selects - 128MB per CS -1GB Total space (8 * 128 MB) 16 bit wide bus Multiplexed Addr/Data 2KB non-multiplexed Support for:NAND/NOR Flash, One NAND Flash, SRAM, OneNAND, & Pseudo-SRAM devices SDRAM Controller (SDRCM) Subsystem support for low-power or Mobile single-data-rate (LPSDR or M-SDR) and low-power double-data-rate SDRAM (LPDDR) 16 Mbits, 32 Mbits, 64 Mbits, 128 Mbits, 256 Mbits, 512 Mbits , 1 Gbit, and 2 Gbits device supportMMC/SD/SDIOx3GPMCSDRC
USB USB 2.0 HS OTG Controller USB 2.0 low-speed (1.5M bit/s), full-speed (12M bit/s), and high-speed (480M bit/s) host USB 2.0 full-speed (12M bit/s), and high-speed (480M bit/s) peripheral OTG Support PHY interface – ULPI (HS/FS) USB Host Controller Host only All 3 ports operate in either HS or FS mode (determined by selected PHY connection) HS Mode• 480M bit/s• Available Port – 1 & 2• PHY interface ULPI FS Mode• 12M bit/s• Available Port – 1, 2, and 3• PHY interface Serial AsynchronousUSBHost Controller x2USB 2.0 HSOTGControllerHS-only EHCI host planned for 1Q09 on Beagle Board,USB 2.0 HS/FS/LS OTG available today
Serial Interfaces and HDQ/1-Wire 3 Master/Slave High-Speed Inter-Integrated Circuit Controllers (I2C) 5 Multi Channel Buffered Serial Ports (McBSP) 512 Byte Transmit/Receive Buffer (McBSP1/3/4/5) 5K-Byte Transmit/Receive Buffer (McBSP2) SIDETONE Core Support (McBSP2 and 3 Only) For Filter, Gain, and Mix Operations Direct Interface to I2S and PCM Device and TDM Buses 128 Channel Transmit/Receive Mode 4 Master/Slave Multi Channel Serial Port Interface (McSPI) 3 UARTs (One with Infrared Data Association [IrDA] and Consumer Infrared [CIR] Modes) 1 HDQ / 1-WireI2Cx3UARTx2UARTw/IRDAMcBSPx5McSPIx4HDQ /1-wire
Package (1/2)12 x 12 mm 0.40 mm pitch 515 pin plastic BGA
OMAP35x POP Memory Description POP = Package on Package Technology Provides customers the advantage of saving PCB area, mDDR routing and the flexibility of choosing their own top POP Package memory configuration Combination of fine ball pitch and POP requires more attention to detail on manufacturing than has normally been needed TI has been supporting key memory suppliers, such as Micron and Samsung on the development of POP memories2 Pass Assembly MethodMemory PackageOMAP35x12x12mm1.6 mm0.4mm pitch1 Pass Assembly Method
Package (2/2)16 x 16 mm 0.65 mm pitch 423 pin plastic BGA
Final solution is the OMAP 35xx package. 423 pins routed out in only 2 signal layers with .8mm pitch PCB rules.Package Stats:• 0.65mm pitch, BUT• 18 mil (0.45mm) vias• 5 mil (0.125mm)space/trace width• 2 layer routingComparison with 0.8mm:• Requires fewer PCB layers• Cheaper PCB cost due to reduced layers• Bigger via size• Same trace width• Same space width• Only assembly tolerances are tighterVia Channel Array Solution
0.8mm pitchNo5 mils5 mils17mm x 17mm(400 pins)289mm26 --ComparisonMicro Vias?Min TraceMin SpacePackage sizeAreaPCB Layers req.Reduction from .8mm0.65mm p. w/Via ChannelsNo5 mils5 mils16mm x 16mm(423 pins)256mm2411%(Competition) (OMAP 35xx)Via Channel Array Benefits Summary
Power Management IntroductionPower management aims to improve battery life of equipment by minimizing power consumption while guaranteeing expected system performanceActive power consumption occurs while some processing is on-going Dynamic power consumption (transistor switching) + Leakage consumption Static (also Standby or Idle) power consumption occurs when limited or no processing is on-going and the system is waiting for a wakeup event Very limited dynamic power consumption + Leakage consumption Managed by Dynamic Voltage & Frequency Scaling (DVFS) Adaptive Voltage Scaling (AVS) Dynamic Power Switching (DPS)On OMAP35xx, power management is handled by the Power, Reset and Clock Management (PRCM) module
Dynamic Voltage and FrequencyOPP ARM MHz Vdd1 OPP L3 MHz Vdd25 600 1.35 3 166 1.154 550 1.27 2 100 13 500 1.2 1 41.5 0.92 250 11 125 0.9OMAP35xx Higher voltage needed to meet higher performance (frequency) No need to run at the highest frequency (and highest voltage and power) all the time Depending on performance required by the application scenario, can lower clocks and lower voltage, thereby lowering power consumption Define and characterize Operating Performance Points (OPPs) for the device. OPP is a voltage and frequency pair, specifying the minimum voltage at which all devices can meet that frequency requirement (i.e. if a device is picked at random and supplied with the OPP voltage, it will be capable of running at the OPP frequency no matter where it falls on the process curve) DVFS applicable to VDD1 and VDD2 in OMAP3
Adaptive Voltage ScalingGreen line: Hot deviceBlue line: Cold device• Silicon manufacturing process yields a distribution of performance capability• For a given frequency requirement:•Devices on hot/strong/fast end of distribution can meet this at a lower voltage•Devices on cold/weak/slow end of distribution need higher voltage• Simple system will set the higher voltage for operating all devices• Smarter system will adapt operating voltage per device: SmartReflex, TI’s Adaptive Voltage Scaling (AVS) implementation
OMAP35x Power Domains 16 different power domains 1 always ON power domain• WAKEUP 9 power domains controllable (switchable) by user or automatically by PRCM• MPU• NEON• IVA2• GFX• CORE• DSS• CAM• PER• EMU 6 power domains controllable only by the PRCM• SR• EFUSE• MPU DPLL (DPLL1)• IVA2 DPLL (DPLL2)• CORE DPLL (DPLL3)• PERIPHERAL DPLL (DPLL4)WKUP domainWake-up domain (ALWAYS active)NEON domainMultimedia Coprocessor domainIVA2 domainAudio Video Processor domainMPU domainMicro Processor domainCORE domainInterconnect, memory controllers,Peripherals and clock management domainPER domainLow power use cases peripheralsdomainGFX domain2D/3D graphics engine domainDSS domainDisplay domainCAM domainCamera controller domainEFUSE domaineFuse Farm domainSMART REFLEX™ domainMicro Processor domainEMU domainEmulation domainDPLL1 domainMPU DPLL domainDPLL2 domainIVA2 DPLL domainDPLL3 domainCORE DPLL domainDPLL4 domainPeripherals DPLL domain
Power Options for OMAP35xDVFS & Class-3 SmartReflex Capable PMIC (multi-output DCDC) TPS65950 (samples available 2Q08, RTM 3Q08) TPS65930 (samples available 3Q08, RTM 4Q08) TPS65920 (samples available 3Q08, RTM 4Q08) TPS65073 (samples available 3Q08, RTM 4Q08) Single Output DCDC TPS62350 (in production)DVFS & Class-1 / Class-2 SmartReflex Capable PMIC (multi-output DCDC) TPS65023 (in production)
TPS65920TPS65930TPS65073TPS65023TPS62350TPS65950Feature Overview of Analog SolutionsIntegration3 DCDC4 LDO3 DCDC4 LDO3 DCDC2 LDO1 DCDCPower 3 DCDC10 LDO3 DCDC2 LDOIntegratedBattery ChargerController AC & USBw/ DPPMUSB 2.0 HS OTG PHYRTC 32kHzClocking Control, Optional SecurityTouchscreenInterfaceKeypad InterfaceMaximum SystemFlexibilityMaximum SystemIntegrationDrivers RGB and Vibra RGB or Vibra wLEDRGB or VibraAudio Codec & DriversDual Stereo TxDual Stereo RxDual TxMono Rx10-bitADC2 inputs3 inputs 2 inputs 4 inputsI2CInterface2 HS I2C 2 HS I2C 2 HS I2C 1 HS I2C1 I2C1 I2CCar-KitCEAMCPCCEA
TPS659xx Power Block DiagramVDD1 DCDCVDD2 DCDCVIO DCDCVDACVPLLVAUXVMMCUSB CPVRTCUSB PHYMPU IVACOREIOs Memory DisplayWake-Up domainsPLLVPP orCamera IFMMC1Video DACOMAP3530TPS659xx
What, why, who, and how of open source
PerformancePower DissipationPriceThe fourth vector of value
PerformancePower DissipationPriceThe fourth vector of valueParticipationBluetooth®A-GPSWLAN
What is “open source”?Form of S/W Delivery Software source code Available to general public Relaxed intellectual property restrictions Group of software licenses May require source code be made available to public License accompanies the software package Often in actual source codeS/W Development Model Principles and practices Promote a collaborative development model Utilize open source software delivery method Culture Collective decisions shared during development
General benefits of open source Faster Innovation Collaborate faster than standard product release cycles Engage and fuel passionate innovators/developers Peer-to-peer conversation and open idea exchange Better Solutions Software quality through expert peer review New preferred peer support through community Faster feedback on product requirements and tools
Why do people participate?Simplified view Leverage community to solve own problems, then share for possible benefits (scratch an itch) May develop solution on their own Benefits are generally improvements to the code Not much benefit required, if no expecting loss May utilize community to various degrees Solve community problems for fame and glory Could just like getting a “pat on the back” Could get a job or contract
Many are professional developers Linux 70% attributed companies• See table at right Firefox Google attributed for $56 million of Mozilla’s $66 million 2006 revenue Google is the default search engine on Firefox search bar Commercial software vendors Share development costs Influence technology direction Enable their proprietary solutions Develop core expertise
Commercial vs. community Beyond commercial benefits of open source Success typically depends heavily on “community” Gartner recommendations for building community Allow participants to self-select Eliminate barriers to participation Provide clear engagement rules for consensus Provide fair and reciprocal ownership and access Make visible historic and current work in progress Make visible individual contribution history Implement agreed standards Decompose problem for parallel development Seek continuous improvement and low-cost integration
Community is a conversation Bill Gatliff (Embedded Systems Conference) How do we motivate embedded systems developers?• [Software support for the platform] is on the mainline• [The platform] just works• What tools are available to me? Matthew Walster (demo scene) How do we motivate a demo hacker?• Make it really, really easy –or–• Make it really hard Tony Lindgren (linux-omap git maintainer) How do we speak to the Linux kernel developers?• Code is the conversation• More patches, less powerpoints
What motivates participants?Categories courtesy of “LugRadio” – it is largely about control Community Participant Likes attention and being part of something big Tinkerer Desires to know how things work and to tweak them Underdog Fan Likes to cheer on anyone who’ll take on the big guys Cheap Want things for free, or as cheap as possible Freedom Crusader Desires to prevent others from controlling their destiny
Linux Most widely utilized open source operating system Clone of the UNIX operating system Licensed under GNU General Public License (GPL) Directly refers to the kernel (OS), but often used to describe a complete set of applications (or distro) based on the Linux kernel A Linux distribution (distro) is a project that manages a collection of Linux-based software Maintained by individuals, loose-knit teams, volunteer organizations, and commercial entities. At $1.8 bln, Linux servers represent 11.9% of all server revenue1 – not bad for “free” software Linux 2.6.9 defect rate of 0.17 defects/klinescompared to the standard benchmark of 25 defects/klines for commercial software2 Source code: http://www.kernel.org/Linux Distribution Timeline[1] Source: IDC[2] Source: Coverity
Some Linux statistics https://www.linux-foundation.org/publications/linuxkerneldevelopment.php
Getting started with Linux Starting references http://free-electrons/training http://kernelnewbies.org (/UpstreamMerge) The Linux Documentation Project (http://www.tldp.org/) Device Drivers Book (http://www.xml.com/ldd/chapter/book/index.html) http://kerneltrap.org “The” kernel GitWeb http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git Linux-omap kernel http://linux.omap.com http://source.mvista.com/git/ (Tony Lindgren) Others that feed “the” kernel or linux-omap kernel http://www.linux-arm.org/git?p=linux-2.6.git http://www.arm.linux.org.uk/ http://www.sakoman.net/cgi-bin/gitweb.cgi
Distributed version control GIT is different—eliminates often bad assumptions Instead of everyone pushing into Linus’ repository Linus pulls patches from people he trusts Everyone has all of Linus’ history (and their own) locally Patches enter “system” as e-mail messages When a merge is non-trivial, he simply asks others to rebase Mailing list Archives available to everyone Accepted patches applied to ‘git’ repositories Guides to GIT http://linux.yyz.us/git-howto.html http://git.or.cz/ http://www.kernel.org/pub/software/scm/git/docs/
Reproducing diagnostic tests
SD Card An SD Card is an easy way to boot May eventually be replaced by a full USB boot solution 2GB SD card recommended USB SD card reader/writer required Utilize HP card format utility http://selfdestruct.net/misc/usbboot/SP27213.exe
Serial Cable Serial console well-supported in u-boot and kernel May eventually be replaced by USB JTAG is an alternate or extension solution USB networking support in kernel, but consumes port Null modem cable required for serial console Female-9-pin to female-9-pin with crossover AT/Everex adapter cable required Serial terminal software required Windows: TeraTerm, Hyperterm, … Linux: Minicom, …
Chat Install an IRC client Outside TI: http://beagleboard.org/chat TI: http://beagleboardtwiki.sc.ti.com/ Examine http://www.beagleboard.org/irclogs Why ? IRC is nice for beginners, because you can get immediate interactive feedback vs. mailing lists Don’t be shy Everything you say is public, but that’s OK• Avoid making assertions that you don’t know; ignorance is OK• Learn from your mistakes; repeat what you learn
Build environment Linux PC or virtual machine Code Sourcery C compiler• 2007q3 arm-none-linux-gnueabihttp://www.codesourcery.com/gnu_toolchains/arm/releases/2007q3 Git• Version 1.5.4.3 desired/required• Include ‘curl’ support Windows laptop PC
Source Clone Linux kernel and U-Boot from “upstream” Give a couple hours for the download git clone http://source.mvista.com/git/linux-omap-2.6.git git clone http://git.denx.de/u-boot.git Download Beagle pre-built images and sources All released source, binaries, and toolshttp://code.google.com/p/beagleboard/downloads/list Patch 1-4 for U-Boot v1.3.2http://groups.google.com/group/beagleboard/browse_thread/thread/3473b44af1e6e326# Copy all to Linux host
Checkout/patch/build U-Boot cd u-boot git checkout -f v1.3.2 git checkout -b my_branch git tag start patch -p1 < ~/Desktop/patch1.diff.txt Repeat for each of the 4 patch files git add . git commit -a export PATH=$PATH:/opt/arm-2007q3/bin make distclean make CROSS_COMPILE=arm-none-linux-gnueabi- omap3530beagle_config make CROSS_COMPILE=arm-none-linux-gnueabi- cd ..
Checkout/build Linux cd linux-omap-2.6 git checkout d6daf8d8cc5ccf90247def5551ee9c3e8555e848 git tag start git checkout -b my_branch make CROSS_COMPILE=arm-none-linux-gnueabi- distclean make CROSS_COMPILE=arm-none-linux-gnueabi- omap3_beagle_defconfig make CROSS_COMPILE=arm-none-linux-gnueabi- uImage cd ..
Boot Beagle from SD card Format SD card as FAT using HP utility Copy provided MLO (x-load) Copy built v1.3.2-xxx u-boot.bin Copy built 2.6.xx-xxx uImage Copy provided rd-ext2.bin (ramdisk image) Connect serial cable and insert SD card Hold “User” button and apply power Observe “…40T…” on serial port Press a key to halt boot if required Give commands at u-boot prompt (OMAP3 beagleboard.org #) setenv bootargs ‘console=ttyS2,115200n8 root=/dev/ram0 rw ramdisk_size=8192 rootfstype=ext2 initrd=0x81600000,8M’ setenv bootcmd ‘mmcinit;fatload mmc 0 80300000 uImage;fatload 81600000 rd-ext2.bin;bootm 80300000’ saveenv run bootcmd
Create SD/MMC patch e-mail git diff start git format-patch -s -o start
Post patch to OMAP community Readhttp://www.muru.com/linux/omap/README_OMAP_PATCHES Post your patch to mailing listlinux-omap@vger.kernel.org
Collaboration tools
Chat, mail, forums, blogs, and wikis! All exist because they all solve different problems Chat allows you to know someone’s listening Great for beginning and “stupid” questions Mail allows you to reach almost anyone Brings them into the conversation Provides you with a personal log Forums helps get the threads organized Blogs provide emphasis, filtering, and timeliness Wikis enable inputs to become documentation
Chat on IRC http://freenode.net #beagle: discussion regarding the Beagle Board #neuros: discussion #davinci: discussion regarding TI DaVinci products #ol: discussion regarding OMAP Linux (not active) IRC clients http://pidgin.im http://www.mirc.com http://en.wikipedia.org/wiki/List_of_IRC_clients http://www.ircreviews.org/clients/
E-mail regarding OMAP Linux http://BeagleBoard.org/discuss http://vger.kernel.org/vger-lists.html#linux-omap
Forums http://community.ti.com
Blogs (RSS feeds) http://beagleboard.blogspot.com
Wikis http://wiki.davincidsp.com http://tiexpressdsp.com http://elinux.org/BeagleBoard
Registering Beagle projectshttp://code.google.com Anyone can create a new open source project Features Site is “cleaner” than sf.net, but sf.net is OK too Source control is Subversion Issue tracking is custom Provides downloads and wiki support Use common sense and get your manager’s approval Use the tag “beagleboard” Let’s explore: http://code.google.com/p/beagleboard
Git What is Git? Git is a popular version control system designed to handle very large projects with speed and efficiency; it is used mainly for various open source projects, most notably the Linux kernel. Git falls in the category of distributed source code management tools, similar to e.g. GNU Arch or Monotone (or BitKeeper in the proprietary world). Every Git working directory is a full-fledged repository with full revision tracking capabilities, not dependent on network access or a central server. Git is an Open Source project covered by the GNU General Public License v2. It was originally written by Linus Torvalds and is currently maintained by Junio C Hamano. Read more here: http://git.or.cz/ Learn from Linus here: http://www.youtube.com/watch?v=4XpnKHJAok8
Community Participation with Git
Features of Git Strong support for non-linear development.: Git supports rapid and convenient branching and merging, and includes powerful tools for visualizing and navigating a non-linear development history. Distributed development. Like most other modern version control systems, Git gives each developer a local copy of the entire development history, and changes are copied from one such repository to another. These changes are imported as additional development branches, and can be merged in the same way as a locally developed branch. Repositories can be easily accessed via the efficient Git protocol (optionally wrapped in ssh) or simply using HTTP - you can publish your repository anywhere without any special web server configuration required. Efficient handling of large projects. Git is very fast and scales well even when working with large projects and long histories. It is commonly an order of magnitude faster than most other revision control systems, and several orders of magnitude faster on some operations. It also uses an extremely efficient packed format for long-term revision storage that currently tops any other open source version control system. Cryptographic authentication of history. The Git history is stored in such a way that the name of a particular revision (a \commit\ in Git terms) depends upon the complete development history leading up to that commit. Once it is published, it is not possible to change the old versions without it being noticed. Also, tags can be cryptographically signed. Toolkit design. Following the Unix tradition, Git is a collection of many small tools written in C, and a number of scripts that provide convenient wrappers. It is easy to chain the components together to do other clever things.
Everyday Githttp://www.kernel.org/pub/software/scm/git/docs/everyday.html git-show-branch(1) to see where you are. git-log(1) to see what happened. git-checkout(1) and git-branch(1) to switch branches. git-add(1) to manage the index file. git-diff(1) and git-status(1) to see what you are in the middle of doing. git-commit(1) to advance the current branch. git-reset(1) and git-checkout(1) (with pathname parameters) to undo changes. git-merge(1) to merge between local branches. git-rebase(1) to maintain topic branches. git-tag(1) to mark known point.
How to build Git tool from sourceDownload GIT from: http://git.or.cz/How to build GIT ?#> tar –xzvf git-1.5.5.1.tar.gz#> cd <to extracted directory>#> makeHow to install GIT ?#> make prefix=<my directory> installExample: #> make prefix=/home/ubuntu/mygit/ installGIT tools will be installed at /home/ubuntu/mygit/bin (export this PATH to get the GIT commands)
Commands used to pull treesRefer to Tony’s README on muru.com for detailed description on working with OMAP GIT tree.http://www.muru.com/linux/omap/README_OMAP_GITFew important commands:To clone OMAP GIT Tree:$ git clone http://www.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6.git Same GIT tree is also hosted/mirrored at mvista’s site here:$ git clone http://source.mvista.com/gittrees/linux-omap-2.6.git Note: Setup Proxy Server before cloning the tree:Example: #> export http_proxy=http://my.proxy.here:port/To re-sync your branch with mainline: $ git-pull
What do you do with Git?To add new changes:• Open file in any unix compatible editor.• Do the modifications• Save the fileTo store the file in repository:$ git status $ git update-index arch/arm/plat-omap/myfile.c $ git commit -s To generate patches using GIT tool:$ git format-patch -o <output_dir> abcdef0123456789abcdef0123456789abcdef01 Other methods: - Create another local branch and take a normal diff between the too. - Use Quilt. (http://download.savannah.gnu.org/releases/quilt/) 01Linux OMAP01My-Clone0Linus Main LineTAGTAGTAG
Quilt Help for managing patch setsTo create a new patch using Quilt:Go into the Kernel directory:#> cd linux-omapCreate a directory called patches that will hold all of our changes#> mkdir patchesCreate a new patch “patch1” using quilt#> quilt new patch1Add files that will be modified by this new patch.#> quilt add <file name>Edit the file, and save the change.To refresh the patch:#> quilt refresh –diff-statTo pop (reverse) the patches on tree#> quilt pop –aTo push all the patches on tree#> quilt push
QuiltContinued...To add a existing patch to GIT tree using Quilt• Copy patch to patches directory• Update the series file• Do a #> quilt push –a
Community participation with Open Embedded
What is Open Embedded (OE)?http://www.openembedded.org OE is like a top-level ‘Makefile’ Sophisticated layer on top of ‘make’ Tool for building distributions Maintains meta-data database for building open source BitBake is a python tool core to OE Database is built of recipes for each package Inheritance for reuse (autotools, …) Satisfies dependencies and follows build steps• Fetch, unpack, patch, configure, compile, stage, install, & package Opkg tool for package management Replacement for Debian ‘dpkg’ Utilizes pre-built package feeds
What role does OE play? Collaboration on entire distribution “Ångstrøm” is a distribution built with OE Full control over almost every aspect Tool chain, package set, patches, kernel,... Relatively complete starting point ‘armv7a’ compiled binaries in “Ångstrøm” Possible to take a “demo” snapshot Play with higher-level development
What does Ångstrøm provide today?http://beagleboard.org/project/angstrom Browsers Gecko: Firefox 3, Fennec, … WebKit: Epiphany, … Media FFmpeg, XMMS, GStreamer, MythTV, … Development C, Java, Python, Perl, Mono, Ruby, Tk, … Gaming, Networking, …http://www.angstrom-distribution.org/repo/
Installing Ångstrøm onto NAND SD card FAT formatted (default, optionally bootable) boot/kernel/ramdisk to get into OE console• Can store kernel (and ramdisk) in flash Copy of tar.bz2 of full file system image desired Boot console image bootargs = console=ttyS2,115200n8 ramdisk_size=32768 root=/dev/ram0 rw rootfstype=ext2 initrd=0x81600000,32M bootcmd = mmcinit;fatload mmc 0 80300000 uImage;fatload mmc 0 81600000 angstrom-console-rd.gz Flash board opkg install mtd-utils; opkg install mkfs-jffs2 flash_eraseall /dev/mtd4; mkfs.jffs2 -o /dev/mtdblock4 mkdir /mnt/flash; mount -t jffs2 /dev/mtdblock4 /mnt/flash tar xvjf Angstrom-XXX.rootfs.tar.bz2 -C /mnt/flash Boot new file system bootargs = console=ttyS2,115200n8 console=tty0 root=/dev/mtdblock4 rw rootfstype=jffs2 nohz=off video=omapfb:vram:2M,vram:4M bootcmd = nand read 80200000 280000 400000; bootm 80200000http://beagleboard.org/demo/angstrom
What is Open Embedded made from? BitBake build tool Specifically written for top level make problem space Uses inheritance to factor common support from recipes Simple language with shell sequences Language elements and functions can use Python for advanced cases Meta-data Package recipes and classes A number of distribution definitions A number of platform definitions A version control repository of the meta-data Uses Monotone for SCM (moving to Git) Maintains dev and (recently) stable branches
OE reference: typical processing Satisfy all dependencies Build (default command) Fetch get the source code Unpack extract the source code Patch apply patches (local or fetched) Configure run any configuration steps Compile do actual compilation Stage install locally for use by other packages Install install product files to temporary directory Package take installed files and place into packageshelloworld, helloworld-dbg, helloworld-dev, helloworld-doc, helloworld-local
Top Level Default OE flow Build toolchain and libraries Build needed components to packages Build file-system image from packages Will take Gigabytes of storage and hours to perform the above on a clean install
Alternate OE flows Use precompiled toolchain Use pre-downloaded source archives Build toolchain and package as an SDK Build collection of packages only Build file-system image from pre-built packages****** This may not be a current capability
What is OE not good for (today) ? Active development of a given component There are ways to use OE in this fashion but it is not a strength and you can lose code if you are not careful GUI tools to guide and monitor All config is edit of text files Build log is very verbose and not visually structured
Limitations and alternatives Limitations Build environment not always well isolated Many build scripts do native build environment tests Alternatives Matrix• Sponsored by ARM: http://linux.onarm.com• Utilizes Scratchbox and QEMU– Reproduces target environment in cross-compile– Relies on emulation on build host Mamona• Targets Nokia Internet Tablets• Utilizes Open Embedded, Scratchbox, and QEMU• Generates Debian source/binary packages• Solves some “partial emulation” problems Native development or managed code environments
Native, managed, and web-based UI code development
Native development Not limited to embedded/cross tools Reach out to broader developer community Native tools easy to install Immediately see impact of your changes Edit local source files with familiar editors You still need to manage your code!• Version control with git, svn, cvs, … Also possible to perform distributed builds Some packages may require larger memory
Managed code Easier to create an emulation environment But what about performance? JIT compilers may be sufficient Performance bottlenecks are often in just a few places• Just optimize where the issue is, but build the rest fast!• Important to make sure the rest is open for optimization Certainly not for every market If you already know C/GTK+/Qt, use what you know! If you are new, this may be a way to get started
Web-based UI development Familiar paradigm for consumers Enables remote control and monitoring Many HTML/JavaScript developers Opens up use of other web services Mapping Order fulfillment Storage Social networking and mediahttp://www.programmableweb.com/scorecard
Web-based UI development (server) Helma is one option for the server side Based on Java Servlet Container and Mozilla Rhino Provides sessions, user management, Write entire applications in XML/HTML and JavaScript• No recompilation required, allowing for dynamic development• Database options for object storage with automatic persistence– Native XML database for flexibility– Java database connection (JDBC) for scale• Drop-in Java .jar files for access to huge libraries of functions Accessing Linux shell and drivers rt=Packages.java.lang.Runtime.getRuntime(); rt.exec(“…”) new Packages.java.io.File(“…”)
Web-based UI development (client) Epiphany-WebKit is one option for the client side Fast rendering, low memory, and good AJAX support WebKit is easy to embed into other applications Demo beagle-web-control-demo used at ARM Developers’ Conferencehttp://www.beagleboard.org/gitweb/?p=beagle-web-control-demo.git;a=summary • Toggles LED states from web browser Uses Angstrom demo setuphttp://beagleboard.org/demo/angstrom
Demos and resources for more information and support
Many OMAP™ hardware optionsTI/Mistral OMAP35x EVMNokia Internet TabletsLogicPD Zoom Medical and Mobile Developer KitsGumstix OveroCogent CSB740LogicPD OMAP34x Mobile Development Kit3.8” x 6.3” x .95”LogicPD OMAP35x Dev. Kit / Medical EVM5.75” x 6.25”OMAP35x EVM4.25” x 7”Not to scale. Approximate size noted (in inches)OMAP34x SDP8.5” x 11”Beagle Board3” x 3”Gumstix Overo
Many tools optionshttp://focus.ti.com/dsp/docs/dspplatformscontenttp.tsp?sectionId=2&familyId=1525&tabId=2224 Tool / Top features Debug Compile OtherTI CodeComposerStudioLow-level ARM and DSPLow-level ARM (ARMv7) and DSP (NEON roadmap)Power-aware debugARM RealView Low-level ARM Application-level ARM (ARMv7, NEON)Lauterbach Low-level and app ARM and DSPNone Extensive traceGreenHillsLow-level and app ARM and DSPLow-level ARM TraceCodeSourcery Linux application debugLinux kernel/app ARM (ARMv7, NEON)•Cortex-A8 uses ARMv7 instructions Additional third party information: hereThe many OS vendors for are OMAP35x not listed here
Many OS vendors for OMAP35x MontaVista TimeSys RidgeRun BSquare Many, many more126
GFX ARMLinux Kernel / WinCE& Power Management audioGFX Driver2D/3D APIsC64x+ DSP and Video AccelerationApplicationsvideo image audioCodec EngineCodec Engine and Linkvideo image audioFC BIOSTI OMAP35x software architecturehttp://www.ti.com/omap35x video imageMultimediaFrameworkOptionalDRMApp FrameworkGUI
Accessing the TMS320C64x™+ DSP DSP/BIOS™ Link source availablehttp://tiexpressdsp.com Provides code loading and data passing Kernel portions licensed as GPL DSP/BIOS RTOS and componentshttp://tiexpressdsp.com Enables sharing of the DSP as a resource Free TI DSP compilerhttps://www-a.ti.com/downloads/sds_support/targetcontent/LinuxDspTools/index.html Non-commercial use Full support in Code Composer Studiohttp://www.ti.com/expressdsp
The Beagle Board community Support for this board is provided through an active community of hobbyists and developers Being very open enables developers to share Keeps costs low Enables more people to participate 24/7 access to fellow developers http://BeagleBoard.org/discuss Go ahead, ask your questions before you buy… Participate and enjoy!
Participating in the community Joining the herd of catshttp://lwn.net/talks/elc2007 Building Community for your open source projecthttp://www.eclipsecon.org/2006/Sub.do?id=268 Video of Greg Kroah-Hartman on the Linux kernelhttp://www.linuxelectrons.com/news/linux/16774/greg-kroah-hartman-linux-kernel Sending kernel patches upstreamhttp://wiki.omap.com/index.php?title=Patch_upstream_sending
Summary Open source is very diverse and OMAP35x supports that diversity Beagle Board enables new possibilities for open collaboration Enjoy programming again!
Thank you! jdk@ti.com jkridner@beagleboard.org irc://jkridner@irc.freenode.net/#beagle
Package Native Package Software
Yıl : 2020
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