linux on blackfin feb 2010 linux on blackfin feb 2010 sonic zhang ... blacfin dsp lib, float point...
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The World Leader in High Performance Signal Processing Solutions
Linux on Blackfin
Feb 2010
Sonic Zhang
Open Platform Solutions
Processor-DSP
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Agenda
�What is Linux on Blackfin�License�Developing Environment�What’s new in 2009R1 and 2009R1.1�What’s obsolete in 2009R1 and 2009R1.1�Other Key Features�Online Document�Resource and Support�Hardware Available�Q & A
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What is Linux on Blackfin
� Linux on Blackfin is a software development platform for Blackfin microprocessor, which is composed of toochain, boot loader and Linux distribution.
� The Linux distribution includes Linux 2.6 kernel as well as a collection of system and user applications and libraries.
� Linux kernel for Blackfin is the same kernel running on x86, ARM, MIPS, etc. Direct access to hardware or MMR managed by kernel from user space is illegal.
� The Linux 2.6 kernel running on Blackfin has MMU option disabled. Kernel and user space code sit in the same flat physical address space. To develop multi-processor application, vfork or thread API other than fork should be used.
� Because memory fragment is a big issue for NOMMU architecture, frequent memory allocation and free should be avoided. Application are recommended to malloc all memory at start up or manage allocation by itself.
� Linux itself is not a real time OS. But, 3rd party RT enhancement enable RT applications to run under Linux as well. ADEOS is such an option for Linux on Blackfin.
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License
� The license of Linux is GPL/LGPL.� Customers should determine their IP licensing position for
application/library/driver used in end products.� If customer doesn’t want to open its source code:
� Avoid putting proprietary code in kernel.
� Statically link application with libraries of LGPL other than GPL.
� Ask customer to ask their lawyer before making any decision.
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Developing Environment
Appsdebugger
(gdb)
Serial or Ethernet
kerneldebugger
(gdb)
JTAG
uboot
LinuxKernel
Standard Apps
Custom Apps
library
Compiler(gcc)
Assembler(gas)
Linker(ld)
Tool Chain
Binutils
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What’s new in 2009R1 and 2009R1.1
� Kernel General� Update kernel to 2.6.28.10� Port to new arch bf51x, bf526/4/2, bf538/9, mobile
ddr bf54xm � New ADEOS against 2.6.28.10 kernel� Full SMP support for bf561� Update KGDB to mainline, support SMP and on chip
RAM access� Improve double fault handling and other exception
handling � Generic GPIO framework� CPUfreq and voltage scaling framework
� Driver Enhancement� 24-bit EPPI and multi ports for BF548� Write operation in OPT driver� Interrupt driven flow control and hardware flow
control for BF548 in serial driver� 4-bit operation in SDIO driver� Full functional PIO/DMA bfin USB 2.0 host/device
driver
� New drivers� AD73322, SM2602, AD7183B, ADZS-BFLLCD-
EZEXT, AD7879, ADP5588, ADP5520� Marvell 8686 wifi, ENC28J60 Ethernet, KS8893M
Ethernet switch� UBIFS on flash, USB Audio gadget, USB video class
gadget, SPI over SPORT
� New Development Boards� BF518-ezbrd� BF526-ezbrd� BF538-ezkit
� Applications� New shell Hush� Benchmark bonnie++, EDN� USB video class gadget utility� CPUfreq utility� PCMCIA utility� PPI/FPGA Demo� Tslib support in Microwin
� Libraries� Optimize libjpeg forward DCT for Blackfin� Bluetooth ALSA library� TIFF, GIF, OGG, AGG, Vorbis libraries� QT embedded 4.5.0 library� Update to Linphone 3.0 with G.729 codec support
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What’s new in 2009R1 and 2009R1.1
� Toolchain� GCC stable version 4.1 and tryout version
4.3.� Support new arch bf51x, bf522/4/6, bf538/9,
bf54xm� Performance enhancement for USB 2.0
gnICE JTAG utility and hardware debugger. 100 times faster than old version.
� Support building and loading L2 SRAM code/data with L2 attribute in source
� Better support for MAC OS X and Windows host
� U-boot� Update to version 2008.10� Port to new arch bf51x� Switch to new SPI flash framework� New MMC_SPI driver� On-chip ATAPI support� On-chip SDIO support� On-chip USB host support� New console over JTAG driver� Support resuming kernel from suspend to
RAM.� Support boot from UART at any baud rate.
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What’s obsolete in 2009R1 and 2009R1.1
� Page cache limitation patch� Now kernel reap page cache at runtime when memory is allocated.
� No Power of 2(NP2) malloc support� No replacement. Use generic kmalloc.
� PBX Zaptel driver� recommend customer to Asterisk code base
� blackfin specific NAND driver� switch to generic platform NAND driver
� blackfin specific spi_mmc driver� swtich to generic mmc_spi driver.
� blackfin specific IDE driver� switch to libata platform driver and pcmcia driver
� unmaintained pehci USB driver� use ISP 1760 USB HOST driver in kernel
� Uncompressed kernel binary with initramfs� Generate uImage only. Booting kernel ELF image is no longer supported in uboot.
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Other Key Features
� Blackfin on chip drivers� Ethernet, UART, DMA, I2C, SPI, CAN Bus,
Power Management, Real Time Clock, Watchdog Timer
� Add-on board drivers� V4L driver for cmos camera� Frame buffer driver for LCD or video� Wireless 802.11/Bluetooth� Sound codec� UART over SPORT� SPI ADC/DAC/SD/MMC/Capacitance to Digital
Converter/Touchscreen� I2C keypad/character LCD
� Kernel Memory Management� L1/L2 SRAM allocator� Reserve RAM in boot arguments� DMA memory copy� Process stack check
� Libraries� uClibc� Blacfin DSP lib, Float point lib� SQL Lite� ALSA, USB, Bluetooth� PNG lib, ffmpeg� Touchscreen lib� Microwin, SDL, DirectFB
� Applications� Network camera capture� Network waveform Gen, software oscilliscope� Network audio player� Mplayer, VLC� HTTPS web server pound
� Tools� Generate FLAT, FDPIC, bare metal ELF binary� Link shared library� Generate hardware loop and long jump� GCC built-in functions� Eclipse developing and debugging support� JTAG Debugger, lmbench, strace, oprofiler
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Online documentation
� Developing Guide for Blackfin Linux� getting started, development host setup,
How to use� Drivers and kernel� debugging
� Projects� Linphone� ffmpeg and VLC� ADEOS Real Time� Asterisk PBX
� Examples� Using the Distribution� Adding new board configuration� Adding a Hello Program� Adding a new driver� Using available drivers� Living without forks� Cache management� Example applications
http://docs.blackfin.uclinux.org
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Resource and Support
http://blackfin.uclinux.org
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Support via Help Forum
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Bug Tracker
http://blackfin.uclinux.org
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Bug Tracker
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Release Download
http://blackfin.uclinux.org
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Release Download
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Other Resource
�SVN trunk source repository� Linux Distribution
� svn checkout svn://firewall-sources.blackfin.uclinux.org:80/svn/uclinux-dist/trunk uclinux-dist
� Toolchain� svn checkout svn://firewall-sources.blackfin.uclinux.org:80/svn/toolchain/trunk
toolchain� Boot Loader
� svn checkout svn://firewall-sources.blackfin.uclinux.org:80/svn/u-boot u-boot
�Hardware buy stuff� http://docs.blackfin.uclinux.org/doku.php?id=buy_st uff
�Hardware schematics download� http://blackfin.uclinux.org/gf/project/stamp/frs
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Hardware Available
BF537 STAMP Board
Part Number: ADDS-BF537-STAMPCost: $200 (distribution only)
Parallel PortAvailable from Excelpoint
www.execelpoint.comCost: $40
IGLOO ICE
USB 2.0Available from Bluetechnix
http://www.bluetechnix.comCost: €60
gnICE
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Add-On Boards Available
TFT QVGA LCD CMOS Camera
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Add-On Boards Available
I2C Character LCD (24x4) ENC28J60 SPI Ethernet
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More Add-On Boards
� AD1836a sound codec� AD73311 sound codec� ADV7393 video out� ADXL34x I2C/SPI accelerator� USB device/host (SL811/isp1362, isp1760, net2272)� AD7142 SPI Capacitance to Digital Converter� AD7877 SPI Touchscreen� I2C Keypad (4x4)� UART/SPI over SPORT
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Q & A
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The World Leader in High Performance Signal Processing Solutions
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