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Raspberry Pi
"Raspberry Pi" Computer Model-B Rev1
DeveloperRaspberry Pi Foundation
TypeSingle-board computer
Release date29 February 2012
Introductory priceUS$ 25 (model A) and US$ 35 (model B)
Operating systemLinux (Raspbian, Debian GNU/Linux, Fedora, and Arch Linux ARM) RISC OS, FreeBSD, NetBSD, Plan 9
CPUARM1176JZF-S (armv6k) 700 MHz, Raspberry Pis can dynamically increase clockspeeds, and some can temporarily reach speeds up to 1 GHz.
Memory256 MByte (Model A)
512 MByte (Model B rev 2)
256 MByte (Model B rev 1)
StorageSD card slot
(SD or SDHC card)
GraphicsBroadcom VideoCore IV
Power2.5 W (model A), 3.5 W (model B)
Websitewww.raspberrypi.org

The Raspberry Pi is a credit-card-sized single-board computer developed in the UK by the Raspberry Pi Foundation with the intention of promoting the teaching of basic computer science in schools.

The Raspberry Pi is manufactured through licensed manufacturing deals with Element 14/Premier Farnell, RS Components and Egoman. All of these companies sell the Raspberry Pi online. Egoman produce a version that is only able to be distributed in China and Taiwan and can be distinguished from other Pis as they are Red and do not have the FCC/CE marks. All of the hardware is the same.

The Raspberry Pi has a Broadcom BCM2835 system on a chip (SoC), which includes an ARM1176JZF-S 700 MHz processor (The firmware includes a number of "Turbo" modes so that the user can attempt overclocking, up to 1 GHz, without affecting the warranty), VideoCore IV GPU, and was originally shipped with 256 megabytes of RAM, later upgraded to 512MB. It does not include a built-in hard disk or solid-state drive, but uses an SD card for booting and long-term storage. The Foundation's goal is to offer two versions, priced at US$25 and US$35. The Foundation started accepting orders for the higher priced model B on 29 February 2012, and the lower cost model A on 4 February 2013.

The Foundation provides Debian and Arch Linux ARM distributions for download. Also planned are tools for supporting Python as the main programming language, with support for BBC BASIC, (via the RISC OS image or the "Brandy Basic" clone for Linux), C, and Perl.

On 17 December 2012 the Raspberry Pi Foundation, in collaboration with IndieCity and Velocix, opened the "Pi Store", as a "one-stop shop for all your Raspberry Pi (software) needs". Using an application included in Raspbian, users can browse through several categories and download what they want. Software can also be uploaded for moderation and release.

History

An early alpha-test board in operation. Its layout is different from the beta and production boards.

In 2006, early concepts of the Raspberry Pi were based on the Atmel ATmega644 microcontroller. Its schematics and PCB layout are available for public download. Foundation trustee Eben Upton assembled a group of teachers, academics and computer enthusiasts to devise a computer to inspire children. The computer is inspired by Acorn's BBC Micro of 1981. The first ARM prototype version of the computer was mounted in a package the same size as a USB memory stick. It had a USB port on one end and a HDMI port on the other.

Pre-launch

In August 2011, fifty Alpha boards were manufactured. These boards were functionally identical to the planned model B, but were physically larger to accommodate debug headers. Demonstrations of the board showed it running the LXDE desktop on Debian, Quake 3 at 1080p, and Full HD MPEG-4 video over HDMI.

In October 2011, a version of RISC OS 5 was demonstrated in public, and following a year of development the port was released for general consumption in November 2012.

Certificate of authenticity for an auctioned board

In December 2011, twenty-five model B Beta boards were assembled and tested from one hundred unpopulated PCBs. The component layout of the Beta boards was the same as on production boards. A single error was discovered in the board design where some pins on the CPU were not held high; it was fixed for the first production run. The Beta boards were demonstrated booting Linux, playing a 1080p movie trailer and the Rightware Samurai OpenGL ES benchmark.

During the first week of 2012, the first 10 boards were put up for auction on eBay. One was bought anonymously and donated to the museum at The Centre for Computing History in Suffolk, England. The ten boards (with a total retail price of £220) together raised over £16,000, with the last to be auctioned, serial number No. 01, raising £3,500. In advance of the anticipated launch at the end of February 2012, the Foundation's servers struggled to cope with the load placed by watchers repeatedly refreshing their browsers.

Launch

The first batch of 10,000 boards was manufactured in Taiwan and China, rather than in the UK. This is in part because import duty is payable on individual components but not on finished products. Chinese manufacturers also quoted a lead time of four weeks, compared to twelve weeks in the UK.

Shipping delays for the first batch were announced in March 2012, as the result of installation of an incorrect Ethernet port. But the Foundation expects that manufacturing quantities of future batches can be increased with little difficulty if required.

"We have ensured we can get them in large numbers and Premier Farnell and RS Components have been fantastic at helping to source components," Upton said.

Initial sales commenced 29 February 2012 at 06:00 UTC;. At the same time, it was announced that the Model A, originally to have had 128 MB of RAM, was to be upgraded to 256 MB before release. The Foundation's website also announced "Six years after the project's inception, we're nearly at the end of our first run of development – although it's just the beginning of the Raspberry Pi story." The web-shops of the two licensed manufacturers selling Raspberry Pi's within the United Kingdom, Premier Farnell and RS Components, had their websites stalled by heavy web traffic immediately after the launch. At one point the webmaster pleaded, "Guys – can you please stop hitting F5 on our website quite so often? You're bringing the server to its knees." Although as yet unconfirmed, reports suggest that there are over two million expressions of interest or pre-orders. The official Raspberry Pi Twitter account reported that Premier Farnell sold out within a few minutes of the initial launch, while RS Components took over 100,000 pre orders on day one. As of September 2012, about 500,000 boards have been sold.

Manufacturers were reported in March 2012 to be taking a "healthy number" of pre-orders.

Post-launch

On 16 April 2012 reports started to appear from the first buyers who had received their Raspberry Pi. As of 22 May 2012 over 20,000 units have been shipped. On 16 July 2012 it was announced that 4000 units were being manufactured per day, allowing Raspberry Pis to be bought in bulk. On 5 September the Raspberry Pi Foundation announced a second revision of the Model B Raspberry Pi. On 6 September 2012 it was announced that in future the bulk of Raspberry Pi units would be manufactured in the UK, at Sony's manufacturing facility in Pencoed, Wales. The Foundation estimates the plant will produce 30,000 units per month, and will create about 30 new jobs. In October 2012 it was reported that some customers of one of the two main distributors had been waiting more than six months for their orders. This was reported to be due to difficulties in sourcing the CPU and conservative sales forecasting by this distributor.

Hardware

Location on the PCB of connectors and major ICs
Block diagram of the Model-B;
in a Model-A the lowest two blocks and the rightmost block are missing (note that these three blocks are in a chip that actually contains a three-port USB hub, with a USB Ethernet adapter connected to one of its ports).
In the Model-A the USB port is connected directly to the SoC.
A Raspberry Pi system running an X server.
Pinout-diagram

Initial sales are of the Model B, with plans to release the Model A in early 2013. Model A has one USB port and no Ethernet controller, and will cost less than the Model B with two USB ports and a 10/100 Ethernet controller.

Though the Model A doesn't have an 8P8C (RJ45) Ethernet port, it can connect to a network by using a user-supplied USB Ethernet or Wi-Fi adapter. There is in reality no difference between a model A with an external Ethernet adapter and a model B with one built in, because the Ethernet port of the model B is actually a built-in USB Ethernet adapter. As is typical of modern computers, generic USB keyboards and mice are compatible with the Raspberry Pi.

The Raspberry Pi does not come with a real-time clock, so an OS must use a network time server, or ask the user for time information at boot time to get access to time and date for file time and date stamping. However, a real-time clock (such as the DS1307) with battery backup can be added via the I²C interface.

On 20 April 2012 the schematics for the Model-A and Model-B were released by the Raspberry Pi Foundation.

Hardware accelerated video (H.264) encoding became available on 24 August 2012 when it became known that the existing license also covered encoding. Previously it was thought that encoding would be added with the release of the announced camera module. However, for the time being, there is no stable software support for hardware H.264 encoding.

At the same time the Raspberry Pi Foundation released two additional codecs that can be bought separately, MPEG-2 and Microsoft's VC-1. Also it was announced that the Pi will support CEC, enabling it to be controlled with the television's remote control.

On 5 September 2012, a revision 2.0 board was announced, with a number of minor corrections and improvements.

On 15 October 2012, the Raspberry Pi foundation announced that all new Raspberry Pi model B's would be fitted with 512MB RAM chips instead of 256MB chips

Specifications

Model A Model B
Target price: US$ 25 US$ 35
SoC: Broadcom BCM2835 (CPU, GPU, DSP, SDRAM, and single USB port)
CPU: 700 MHz ARM1176JZF-S core (ARM11 family)
GPU: Broadcom VideoCore IV
OpenGL ES 2.0 (24 GFLOPS)
MPEG-2 and VC-1 (with license), 1080p30 h.264/MPEG-4 AVC high-profile decoder and encoder
Memory (SDRAM): 256 MB (shared with GPU) 512 MB (shared with GPU) as of 15 October 2012
USB 2.0 ports: 1 (direct from BCM2835 chip) 2 (via the built in integrated 3-port USB hub)
Video input: A CSI input connector allows for the connection of a RPF designed camera module
Video outputs: Composite RCA (PAL and NTSC), HDMI (rev 1.3 & 1.4), raw LCD Panels via DSI

14 HDMI resolutions from 640×350 to 1920×1200 plus various PAL and NTSC standards.

Audio outputs: 3.5 mm jack, HDMI, and, as of revision 2 boards, I²S audio (also potentially for audio input)
Onboard storage: SD / MMC / SDIO card slot (3,3V card power support only)
Onboard network: None 10/100 Ethernet (8P8C) USB adapter on the third port of the USB hub
Low-level peripherals: 8 × GPIO, UART, I²C bus, SPI bus with two chip selects, I²S audio +3.3 V, +5 V, ground
Power ratings: 300 mA (1.5 W) 700 mA (3.5 W)
Power source: 5 volt via MicroUSB or GPIO header
Size: 85.60 mm × 53.98 mm (3.370 in × 2.125 in)
Weight: 45 g (1.6 oz)
Operating systems: Arch Linux ARM, Debian Linux, Fedora, FreeBSD, Plan 9, Raspbian OS, RISC OS,Slackware Linux
Notes
  1. Model A and Model B are cultural references to the original models of the British educational BBC Micro computer, developed by Acorn Computers, who originally developed the ARM processors (the architecture of the Raspberry Pi) and operating system RISC OS, which will also be able to be run on the Raspberry Pi (version 5.17).
  2. On the older beta model B boards, 128 MB was allocated by default to the GPU, leaving 128 MB for the CPU. On the first 256 MB release model B (and Model A), three different splits were possible. The default split was 192 MB (CPU RAM), which should be sufficient for standalone 1080p video decoding, or for simple 3D, but probably not for both together. 224 MB was for Linux only, with just a 1080p framebuffer, and was likely to fail for any video or 3D. 128 MB was for heavy 3D, possibly also with video decoding (e.g. XBMC). Comparatively the Nokia 701 uses 128 MB for the Broadcom VideoCore IV. For the new model B with 512MB RAM initially there were new standard memory split files released( arm256_start.elf, arm384_start.elf, arm496_start.elf) for 256MB, 384MB and 496MB CPU RAM (and 256MB, 128MB and 16MB video RAM). But a week or so later the RPF released a new version of start.elf that could read a new entry in config.txt (gpu_mem=xx) and could dynamically assign an amount of RAM (from 16 to 256MB in 8MB steps) to the GPU, so the older method of memory splits became obsolete, and a single start.elf worked the same for 256 and 512 MB Pis.
  3. Level 2 Cache is 128 kB, used primarily by the GPU, not the CPU.
  4. The ARM11 is based on version 6 of the ARM architecture (ARMv6), which due to its age is no longer supported by several popular versions of Linux, including Ubuntu which dropped support for processors below ARMv7 in 2009.
  5. The Raspberry Pi also contains a 15-pin MIPI camera interface (CSI) connector, which is used with the Raspberry Pi Camera Addon.
  6. Support for raw LCD panels is available in hardware through the available DSI connector from the Mobile Industry Processor Interface (MIPI) Alliance. Software support is being planned.
  7. Supported digital video resolutions are: 640 × 350 EGA; 640 × 480 VGA; 800 × 600 SVGA; 1024 × 768 XGA; 1280×720 720p HDTV; 1280 × 768 WXGA Variant; 1280 × 800 WXGA Variant; 1280 × 1024 SXGA; 1366 × 768 WXGA Variant; 1400 × 1050 SXGA+; 1600 × 1200 UXGA; 1680 × 1050 WXGA+; 1920 × 1080 1080p HDTV; 1920 × 1200 WUXGA. Also to be supported are the generation of 576i and 480i composite video signals for PAL-BGHID, PAL-M, PAL-N, NTSC and NTSC-J
  8. Originally the on-board USB ports were designed for USB devices using one "unit load" (100 mA) of current. Devices using more than 100 mA were incompatible with the Raspberry Pi, and for them a self-powered USB hub was required. However, due to user feedback, the RPF, at the end of August 2012, decided to remove the USB polyfuses which largely caused this behaviour. However, the maximum current that can be delivered to a USB port on these modified boards is still limited by the capabilities of the power supply used, and the 1.1 A main polyfuse. Spontaneous rebooting and/or crashing caused by hot plugging certain USB devices was introduced as a result of this change, which further reduced the standards compliance of the Raspberry Pi's USB implementation.
  9. Newer versions of the firmware contain the option to choose between five overclock ("turbo") presets that when turned on try to get the most performance out of the SoC without impairing the lifetime of the Pi. This is done by monitoring the core temperature of the chip, and the CPU load, and dynamically adjusting clock speeds and the core voltage. So when there is a low demand on the CPU, or it is getting too hot, the performance is throttled down, but if the CPU has much to do, and the chip's temperature allows it, performance is temporarily increased, with clock speeds up to 1 GHz, depending on the individual board, and on which of the "turbo" settings is used. The five settings currently are:
    1. "None"; 700 MHz ARM, 250 MHz core, 400 MHz SDRAM, 0 overvolt,
    2. "Modest"; 800 MHz ARM, 250 MHz core, 400 MHz SDRAM, 0 overvolt,
    3. "Medium" 900 MHz ARM, 250 MHz core, 450 MHz SDRAM, 2 overvolt,
    4. "High"; 950 MHz ARM, 250 MHz core, 450 MHz SDRAM, 6 overvolt,
    5. "Turbo"; 1000 MHz ARM, 500 MHz core, 600 MHz SDRAM, 6 overvolt
  10. The five overclock ("turbo") presets were changed because overclocking the core causes SD card corruption, apparently due to bugs in the BCM2835 SoC. They originally were:
    1. "None"; 700 MHz ARM, 250 MHz core, 400 MHz SDRAM, 0 overvolt,
    2. "Modest"; 800 MHz ARM, 300 MHz core, 400 MHz SDRAM, 0 overvolt,
    3. "Medium" 900 MHz ARM, 333 MHz core, 450 MHz SDRAM, 2 overvolt,
    4. "High"; 950 MHz ARM, 450 MHz core, 450 MHz SDRAM, 6 overvolt,
    5. "Turbo"; 1000 MHz ARM, 500 MHz core, 500 MHz SDRAM, 6 overvolt

Software

Architecture

Visual diagram of API connections

The Raspberry Pi uses Linux kernel-based operating systems. Raspbian, a Debian-based free operating system optimized for the Raspberry Pi hardware, is the current recommended system, released in July 2012.

The GPU hardware is accessed via a firmware image which is loaded into the GPU at boot time from the SD-card. The firmware image is known as the binary blob, while the associated ARM coded Linux drivers were initially closed source. this part of the driver code was later released, , however much of the actual driver work is done using the closed source GPU code. Application software uses calls to closed source run-time libraries (Open Max, Open GL ES or open VG) which in turn calls an open source driver inside the Linux kernel, which then calls the closed source Videocore IV GPU driver code. The API of the kernel driver is specific for these closed libraries. Video applications use OpenMAX, 3D applications use OpenGL ES and 2D applications use OpenVG which both in turn use EGL. OpenMAX and EGL use the open source kernel driver in turn.

On 19 February 2012, the Raspberry Pi Foundation released its first proof of concept SD card image that could be loaded onto an SD card to produce a preliminary operating system. The image was based upon Debian 6.0 (Squeeze), with the LXDE desktop and the Midori browser, plus various programming tools. The image also runs on QEMU allowing the Raspberry Pi to be emulated on various other platforms.

System software

On 8 March 2012 The Raspberry Pi Foundation released Raspberry Pi Fedora Remix, at the time its recommended Linux distribution, which was developed at Seneca College in Canada. The Foundation intends to create an App Store website for people to exchange programs.

Slackware ARM (formally ARMedslack) version 13.37 and later runs on the Raspberry Pi without modification. The 128–496 MB of available memory on the Raspberry Pi is twice the minimum requirement of 64 MB needed to run Slackware Linux on an ARM or i386 system. (Whereas the majority of Linux systems boot into a graphical user interface, Slackware's default user environment is the textual shell / command line interface.) The Fluxbox window manager running under the X Window System requires an additional 48 MB of RAM.

In addition, work is being done on system-specific light Linux distributions such as IPFire, OpenELEC, Raspbmc and the XBMC open source digital media center.

Trustee Eben Upton publicly approached the RISC OS Open community in July 2011 to enquire about assistance with a potential port. Adrian Lees at Broadcom has since worked on the port, with his work being cited in a discussion regarding the graphics drivers.

On 24 October 2012 the Raspberry Pi Foundation announced that "all of the VideoCore driver code which runs on the ARM" had been released as free software under a BSD-style license, making it "the first ARM-based multimedia SoC with fully-functional, vendor-provided (as opposed to partial, reverse engineered) fully open-source drivers", although this claim has not been universally accepted.

On 25 May 2013 the Raspberry PI foundation pre-announced that (initially) for Raspbian they would switch from using the X Window System to the Wayland display server protocol. This would enable the efficient use of the GPU for hardware accelerated GUI drawing functions.

On June 3, 2012 the Raspberry PI foundation introduced a new tool called "New Out Of Box Software" or "NOOBS" which makes taking the Raspberry PI to use much easier by simplifying the installing of an Operating System on it. Instead of using specific software to "burn an SD-card", now all you have to do is to unzip a file and copy the contents over to a FAT formatted (4G or bigger) SD-card. then you can boot that card on the PI and are presented with a choice of six operating systems you can choose to install on the card. The system also contains a recovery partition that allows for the quick restoration of the OS you have chosen to install.

Operating systems

This is a list of operating systems running, ported or in the process of being ported to Raspberry Pi.

  • Multi-purpose light distributions:
    • Moebius, a light ARM HF distribution based on Debian. It uses Raspbian repository, but it fits in a 1 GB SD card. It has just minimal services and its memory usage is optimized to keep a small footprint.
    • OpenWrt "Attitude Adjustment" 12.09
    • Squeezed Arm Puppy, a version of Puppy Linux (Puppi) for the ARMv6 (sap6) specifically for the Raspberry Pi.

User applications

The following is an abbreviated assortment of the kind of applications that can be easily installed on Raspbian via apt-get:

Build from sources:

Accessories

The Foundation reported on its blog in May 2012 about a prototype camera module they have tested. The prototype used a 14 megapixel module, while the released version will be 5 megapixels.

On the 14th of May 2013 the foundation and the distributors RS Components & Premier Farnell/Element 14 launched the camera board with updated firmware to support the camera board. The camera board is shipped with a flexible flat cable that plugs into the CSI connector located between the Ethernet and HDMI ports. In Raspbian support can be enabled by the installing or upgrading to the latest version of the OS and then running Raspi-config and selecting the camera option. The cost of the camera module is ~ £20 in the UK.

A number of Raspberry Pi specific peripheral devices and cases are available from third-party suppliers. These include the Raspberry Pi Foundation sanctioned Gertboard, which is designed for educational purposes, and expands the Raspberry Pi's GPIO pins to allow interface with and control of LEDs, switches, analog signals, sensors and other devices. It also includes an optional Arduino compatible controller to interface with the Pi.

Community

The Raspberry Pi community was described by Jamie Ayre of FLOSS software company AdaCore as one of the most exciting parts of the project. Community blogger Russell Davis said that the community strength allows the Foundation to concentrate on documentation and teaching. The community is developing fanzines around the platform, such as The MagPi. A series of community Raspberry Jam events have been held across the UK and further afield, led by Alan O'Donohoe, principal teacher of ICT at Our Lady's High School, Preston, and a teacher-led community from RaspberryJam has started building an crowdsourced Scheme of Work.

Reception and influence

Technology writer Glyn Moody described the project in May 2011 as a "potential BBC Micro 2.0", not by replacing PC compatible machines but by supplementing them. In March 2012 Stephen Pritchard echoed the "BBC Micro successor" sentiment in ITPRO. Alex Hope, co-author of the Next Gen report, is hopeful that the computer will engage children with the excitement of programming. Co-author Ian Livingstone suggested that the BBC could be involved in building support for the device, possibly branding it as the "BBC Nano". Chris Williams, writing in The Register sees the inclusion of programming languages such as Kids Ruby, Scratch and BASIC as a "good start" to equip kids with the skills needed in the future – although it remains to be seen how effective their use will be. The Centre for Computing History strongly supports the Raspberry Pi project, feeling that it could "usher in a new era". Before release, the board was showcased by ARM's CEO Warren East at an event in Cambridge outlining Google's ideas to improve UK science and technology education.

Harry Fairhead, however, suggests that more emphasis should be put on improving the educational software available on existing hardware, using tools such as Google App Inventor to return programming to schools, rather than adding new hardware choices. Simon Rockman, writing in a ZDNet blog, was of the opinion that teens will have "better things to do", despite what happened in the 1980s.

In October 2012 the Raspberry Pi won T3's "Innovation of the Year" award, and futurist Mark Pesce cited a (borrowed) Raspberry Pi as the inspiration for his ambient device project MooresCloud. In October 2012 the BCS reacted to the announcement of enhanced specifications by stating, "it's definitely something we'll want to sink our teeth into."

Use

As of January 2012, enquiries about the board in the United Kingdom have been received from schools in both the state and independent sectors, with around five times as much interest from the latter. It is hoped that businesses will sponsor purchases for less advantaged schools. The CEO of Premier Farnell said that the government of a country in the Middle East has expressed interest in providing a board to every schoolgirl, in order to enhance her employment prospects.

See also

References

  1. Raspberry Pi: We are Live
  2. ^ "FAQs". Raspberry Pi. Retrieved 3 November 2011.
  3. ^ "BCM2835 Media Processor; Broadcom". Broadcom.com. 1 September 2011. Retrieved 6 May 2012.
  4. ^ "Introducing turbo mode: up to 50% more performance for free". Raspberrypi.org. Retrieved 20 September 2012.
  5. At first, for a short time, revision 2 boards were made that had 256MB of RAM
  6. "Raspberry Pi: Cheat Sheet". Silicon.com. Retrieved 6 May 2012.
  7. ^ "FAQs". Raspberry Pi Foundation. Retrieved 6 October 2011.
  8. Cellan-Jones, Rory (5 May 2011). "A £15 computer to inspire young programmers". BBC News.
  9. Price, Peter (3 June 2011). "Can a £15 computer solve the programming gap?". BBC Click. Retrieved 2 July 2011.
  10. Bush, Steve (25 May 2011). "Dongle computer lets kids discover programming on a TV". Electronics Weekly. Retrieved 11 July 2011.
  11. about the Licensed manufacturing deal
  12. Brose, Moses (30 January 2012). "Broadcom BCM2835 SoC has the most powerful mobile GPU in the world?". Grand MAX. Retrieved 13 April 2012.
  13. ^ "Model B now ships with 512MB of RAM". Raspberrypi.org. Retrieved 15 October 2012.
  14. ^ "Verified USB Peripherals and SDHC Cards;". Elinux.org. Retrieved 6 May 2012.
  15. ^ Richard Lawler, 29 February 2012, Raspberry Pi credit-card sized Linux PCs are on sale now, $25 Model A gets a RAM bump, Engadget
  16. launch of the model A announced
  17. "Raspberry Pi downloads".
  18. ^ Upton, Eben (26 July 2011). "FAQs". Retrieved 12 December 2011. Leads, a power supply or SD cards are not included but can be purchased at the same time from Farnell and RS. You will be able to buy preloaded SD cards too. ... We'll be using Fedora as our recommended distribution. It's straightforward to replace the root partition on the SD card with another ARM Linux distribution if you want to use something else. The OS is stored on the SD card.
  19. Upton, Liz (29 August 2011). "FAQs". Raspberry Pi. Retrieved 12 December 2011.
  20. "David Braben on Raspberry Pi". Edge. 25 November 2011. Retrieved 8 December 2011.
  21. "Brandy Basic". Jaguar.orpheusweb.co.uk. 26 July 2005. Retrieved 6 May 2012.
  22. "Introducing the Pi Store". Raspberry Pi Foundation. 17 December 2012.
  23. Wong, George (24 October 2011). "Build your own prototype Raspberry Pi minicomputer". ubergizmo. Retrieved 2 November 2011.
  24. ^ Moorhead, Joanna (9 January 2012). "Raspberry Pi device will 'reboot computing in schools'". The Guardian. London. Retrieved 20 January 2012.
  25. Quested, Tony (29 February 2012). "Raspberry blown at Cambridge software detractors". Business Weekly. Retrieved 13 March 2012.
  26. "Tiny USB-Sized PC Offers 1080p HDMI Output". Retrieved 1 February 2012.
  27. Humphries, Matthew (28 July 2011). "Raspberry Pi $25 PC goes into alpha production". Geek.com. Retrieved 1 August 2011.
  28. "Raspberry Pi YouTube Channel". Retrieved 28 August 2011.
  29. "Full HD video demo at TransferSummit Oxford". Retrieved 12 September 2011.
  30. ^ Holwerda, Thom (31 October 2011). "Raspberry Pi To Embrace RISC OS". OSNews. Retrieved 1 November 2011.
  31. Dewhurst, Christopher (December 2011). "The London show 2011". Archive (magazine). Vol. 23, no. 3. p. 3.
  32. Lee, Jeffrey. "Newsround". The Icon Bar. Retrieved 17 October 2011.
  33. eben. "RISC OS for Raspberry Pi". Retrieved 12 November 2012.
  34. What happened to the beta boards? Dom Cobley (4 February 2012)
  35. We have PCBs! (Raspberry Pi Blog)
  36. More on the beta boards (Raspberry Pi Blog)
  37. Bringing up a beta board (Raspberry Pi Blog)
  38. "We're auctioning ten beta Raspberry Pi's;". Raspberrypi.org. 31 December 2011. Retrieved 6 May 2012.
  39. Williams, Chris (3 January 2012). "That Brit-built £22 computer: Yours for just £1,900 or more". The Register. Retrieved 10 January 2012.
  40. Cheerin, Iris (11 January 2012). "Raspberry Pi Goes Into Production". TechWeekEurope UK. Retrieved 11 January 2012.
  41. ^ "One of the First Raspberry Pi Computers Donated to Museum". The Centre for Computing History. 9 January 2012. Retrieved 28 February 2012.
  42. "eBay list of items sold by Raspberry Pi ''(retrieved 13 January 2012)''". Ebay.co.uk. Retrieved 6 May 2012.
  43. "eBay item ''(retrieved 13 January 2012)''". Ebay.co.uk. 11 January 2012. Retrieved 6 May 2012.
  44. ""Set your alarms!" – Raspberry Pi looks ready for early Wednesday launch". Cabume. 28 February 2012. Retrieved 28 February 2012.
  45. Lee, Robert (17 January 2012). "Raspberry Pi Balks At UK Tax Regime". Tax-News.com. Retrieved 20 January 2012.
  46. Weakley, Kirsty. "UK computing charity opts to manufacture product abroad". Civil Society Media. Retrieved 20 January 2012.
  47. Upton, Liz (8 March 2012). "Manufacturing hiccup". Raspberry Pi Foundation. Retrieved 19 March 2012.
  48. Gilbert, David (9 March 2012). "Raspberry Pi £22 Computer Delayed Due to 'Manufacturing Hiccup'". International Business Times. Retrieved 19 March 2012.
  49. Gilbert, David (13 March 2012). "Interview with Eben Upton – Raspberry Pi Founder". International Business Times. Retrieved 19 March 2012.
  50. "The Raspberry Pi £22 computer goes on general sale". BBC News. 29 February 2012. Retrieved 29 February 2012.
  51. Subramanian, Karthik (2 March 2012). "Low-cost mini-PC Raspberry Pi gets heavily booked". The Hindu. Chennai, India. Retrieved 12 March 2012.
  52. Paul, Ryan (29 February 2012). "Raspberry Pi retailers toppled by demand as $35 Linux computer launches". Ars Technica. Retrieved 29 February 2012.
  53. Naughton, John (4 March 2012). "The Raspberry Pi can help schools get with the programme". The Observer. London. Retrieved 12 March 2012.
  54. "Raspberry Pi Buying Guide". Elinux.org. Retrieved 6 May 2012.
  55. Lomas, Pete (25 September 2012). "Raspberry Pi's Secret: 'Sell Out a Little to Sell a Lot'". Wired. Retrieved 25 September 2012.
  56. ^ Bridgwater, Adrian (15 March 2012). "Community strength blossoms for Raspberry Pi". Computer Weekly. Retrieved 15 March 2012.
  57. "the first reports of forum members reporting they received their Raspberry Pi". Raspberrypi.org. 16 April 2012. Retrieved 6 May 2012.
  58. "engadget reports raspberry pi begins shipping (video)". Engadget.com. Retrieved 6 May 2012.
  59. "Add your Raspberry Pi to the Rastrack map". Raspberrypi.org. 22 May 2012. Retrieved 14 June 2012.
  60. "Raspberry Pi lifts sale restrictions, open to bulk buyers". Electronista. Macintosh News Network. 16 July 2012. Retrieved 29 August 2012.
  61. "Want to buy more than one Raspberry Pi? Now you can!". Raspberrypi.org. 16 July 2012. Retrieved 16 July 2012.
  62. "Upcoming board revision". Raspberrypi.org. 6 September 2012. Retrieved 5 September 2012.
  63. Dunn, John E (7 September 2012). "Raspberry Pi resurrects UK computer industry with new jobs". Computerworld UK. Retrieved 13 September 2012.
  64. "Made in the UK!". Raspberrypi.org. 6 September 2012. Retrieved 6 September 2012.
  65. Shead, Sam (18 October 2012). "Raspberry Pi delivery delays leave buyers hungry (and angry)". ZDNet. Retrieved 18 October 2012.
  66. ^ "SMSC LAN9512 Website;". Smsc.com. Retrieved 6 May 2012.
  67. "schematic design, applicable for both version A and B of the Raspberry Pi revision 1.0". Raspberrypi.org. 19 April 2012. Retrieved 6 May 2012.
  68. raspberrypi.org – Hardware-assisted H.264 video encoding, 2012-02-07
  69. Jurczak, Paul. "Raspberry Pi camera module". Raspberrypi.org. Retrieved 15 October 2012.
  70. "H.264 Hardware encoding performance".
  71. ^ "New video features! MPEG-2 and VC-1 decode, H.264 encode, CEC support". Raspberry Pi Foundation. Retrieved 26 August 2012.
  72. "board revision for rev 2.0". Raspberrypi.org. 5 September 2012. Retrieved 15 October 2012.
  73. Bowater, Donna (29 February 2012). "Mini Raspberry Pi computer goes on sale for £22". The Daily Telegraph. London.
  74. ^ "Q&A with our hardware team". Raspberry Pi Foundation. Retrieved 20 September 2011.
  75. "Camera board available for sale;". Raspberrypi.org.org. Retrieved 6 May 2012.
  76. "Embedded Linux Wiki: Hardware Basic Setup". Elinux.org. Retrieved 25 May 2013.
  77. ^ "Raspberry Pi Wiki, section screens". Elinux.org. Retrieved 6 May 2012.
  78. "diagram of Raspberry Pi with DSI LCD connector". Elinux.org. Retrieved 6 May 2012.
  79. ^ "Raspberry Pi, supported video resolutions". eLinux.org. 30 November 2012. Retrieved 11 December 2012.
  80. I2S driver development thread
  81. More GPIO's can be used if you do not use the low level peripherals
  82. Since the release of the revision 2 model
  83. "Raspberry Pi GPIO Connector;". Elinux.org. Retrieved 6 May 2012.
  84. "Power supply confirmed as 5V micro USB". Raspberrypi.org. Retrieved 25 July 2012.
  85. "Final PCB artwork". Raspberrypi.org. 14 November 2011. Retrieved 6 May 2012.
  86. "Raspberry Pi FAQ". Raspberrypi.org. Retrieved 6 May 2012.
  87. "The Slackware ARM Linux Project". Slackware. Retrieved 23 April 2013.
  88. ^ Williams, Chris (28 November 2011). "Psst, kid... Wanna learn how to hack?". The Register. Retrieved 24 December 2011.
  89. "I have a raspberry pi beta board ama". Reddit.com. 15 January 2012. Retrieved 6 May 2012.
  90. Raspberry Pi boot configuration text file
  91. "Nokia 701 has a similar Broadcom GPU". Raspberrypi.org. 2 February 2012. Retrieved 22 June 2012.
  92. introducing new firmware for the 512MB Pi
  93. Gareth Halfacree. "Raspberry Pi review: Eben Upton reveals all". linuxuser.co.uk.
  94. "camera for the CSI-2 port". Raspberrypi.org. Retrieved 22 June 2012.
  95. "diagram of Raspberry Pi with CSI camera connector". Elinux.org. 2 March 2012. Retrieved 22 June 2012.
  96. Ozolins, Jason. "examples of Raspberry Pi composite output". Raspberrypi.org. Retrieved 22 June 2012.
  97. "Design flaw? Polyfuses for USB current limiting". Raspberrypi.org. Retrieved 22 June 2012.
  98. "asb/raspi-config on Github". asb. Retrieved 13 December 2012.
  99. Owano, Nancy (18 July 2012). "Raspberry Pi gets customized OS called Raspbian". PhysOrg. Retrieved 5 September 2012.
  100. djwm (13 September 2011). "Raspberry Pi warms up". The H. Retrieved 12 March 2012.
  101. ^ "Raspberry Pi maker says code for ARM chip is now open source". Ars Technica. Retrieved 3 November 2012.
  102. raspberrypi.org – Libraries, codecs, OSS, 2012-01-31
  103. "linuxnews showing the first release of Debian Squeeze for Raspberry running on QEMU". Linuxnewshere.com. Retrieved 22 June 2012.
  104. "Raspberry Pi Fedora Remix, our recommended distro, is ready for download!". Raspberrypi.org. 8 March 2012. Retrieved 22 June 2012.
  105. Chung, Emily (24 February 2012). "$35 computer 'Raspberry Pi' readies for launch". Canada: CBC. Retrieved 28 February 2012.
  106. ^ Vallance, Chris (10 January 2012). "Raspberry Pi bids for success with classroom coders". BBC News. Retrieved 29 February 2012.
  107. SlackwareARM for the Raspberry Pi
  108. raspberrypi.org – ArmedSlack working :), 2012-05-18
  109. alt.os.linux.slackware – ARMed Slack running on Raspberry Pi, 2012-05-10
  110. raspberrypi.org – ArmedSlack 13.37, 2012-05-19
  111. "The Slackware Linux Project: Installation Help". Slackware.com. Retrieved 22 June 2012.
  112. Slackware Linux Essentials: The Shell
  113. v1.0.2 (en), xiando. "Desktops: KDE vs Gnome". Linux Reviews. Retrieved 22 June 2012.{{cite web}}: CS1 maint: numeric names: authors list (link)
  114. "[SIG-ARM] IPFire on Raspberry Pi ready to fist test". Lists.ipfire.org. Retrieved 22 June 2012.
  115. Bellavance, Nicolas (17 April 2012). "Quelle distribution utiliser sur Raspberry Pi ?". Retrieved 22 May 2012.
  116. "raspbmc a light Linux distro designed for media application on the Raspberry Pi". Raspbmc.com. Retrieved 22 June 2012.
  117. Tuesday, 28 February 2012 00:36 (28 February 2012). "openelec for XBMC". Openelec.tv. Retrieved 22 June 2012.{{cite web}}: CS1 maint: numeric names: authors list (link)
  118. Upton, Eben (23 July 2011). "Yet another potential RISC OS target?". RISC OS Open. Retrieved 12 March 2012.
  119. Hansen, Martin (31 October 2011). "Raspberry Pi To Embrace RISC OS". RISCOScode. Retrieved 12 March 2012.
  120. Lees, Adrian (8 February 2012). "RISC OS on the Raspberry Pi". RISC OS Open. Retrieved 12 March 2012.
  121. JamesH (29 December 2011). "GPU binary blob question". Raspberry Pi. Retrieved 12 March 2012.
  122. eben upton (24 May 2013). "Wayland". Raspberry Pi. Retrieved 25 May 2013.
  123. Upton, Liz (3 june, 2012). "Introducing the New Out Of Box Software (NOOBS)". RPF. Retrieved 4 June 2012. {{cite web}}: Check date values in: |date= (help)
  124. "Haiku Raspberry Pi commits".
  125. Android 2.3 on the Raspberry Pi
  126. "Bodhi Linux for Raspberry Pi!".
  127. "Raspbian – Debian optimized for the Raspberry Pi hardware".
  128. "Gentoo for the Raspberry Pi!".
  129. "Inspired by CrunchBang Linux, and based on Raspbian. Features the Openbox desktop environment".
  130. "Open WebOS on a Raspberry Pi!".
  131. "9pi".
  132. Plan 9 announcement
  133. "FreeBSD – Raspberry Pi".
  134. "NetBSD – Raspberry Pi".
  135. "NetBSD 6.0 released with initial Raspberry Pi support". The H. 18 October 2012. Retrieved 18 October 2012.
  136. "squeezed ARM puppi". Puppylinux.org. 24 September 2012. Retrieved 15 October 2012.
  137. "Firefly Media Server". Debian. 18 September 2012. Retrieved 23 March 2013.
  138. "Firefly Media Server". Fedora. 26 February 2008. Retrieved 15 March 2013.
  139. Yeomans, Jon (9 August 2012). "Raspberry Pi cases round-up: Eight inventive holders in photos". ZDNet. Retrieved 9 August 2012.
  140. "Gertboard is here!". Raspberry Pi Foundation. 8 August 2012. Retrieved 9 August 2012.
  141. The MagPi – Raspberry Pi online magazine launched, The Digital Lifestyle.com
  142. ^ Parkin, Tony (2 July 2012). "Raspberry Pi-oneers – the making of #RaspberryJam". Merlin John Online. Retrieved 30 August 2012.
  143. "#RaspberryJam Locations". raspberryjam.org.uk website. Retrieved 30 August 2012.
  144. Edney, Andrew (15 July 2012). "An afternoon at the Cambridge Raspberry Jam". Connected Digital World. Retrieved 30 August 2012.
  145. ^ "#RaspberryJam Man". raspberryjam.org.uk website. Retrieved 30 August 2012.
  146. O'Donohoe, Alan (11 January 2012). "Computer science reboot". Teacher Network blog. The Guardian. Retrieved 30 August 2012.
  147. website "#RPiSoW". Retrieved 2 October 2012. {{cite web}}: Check |url= value (help)
  148. Moody Glyn (9 May 2011). "As British as Raspberry Pi?". Computerworld UK Open Enterprise blog. Computerworld. Retrieved 2 February 2012.
  149. Pritchard, Stephen (1 March 2012). "Raspberry Pi: A BBC Micro for today's generation". ITPRO. Retrieved 15 March 2012.
  150. Stanford, Peter (3 December 2011). "Computing classes don't teach programming skills". The Daily Telegraph. London. Retrieved 27 February 2012.
  151. Osborn, George (23 February 2012). "How Google can really help improve STEM teaching in the UK". Cabume. Retrieved 28 February 2012.
  152. Fairhead, Harry (2 December 2011). "Raspberry Pi or Programming – What shall we teach the children?". I Programmer. Retrieved 7 February 2012.
  153. Rockman, Simon (21 February 2012). "Is raspberry pi a mid-life crisis?". ZDNet. Retrieved 24 February 2012. Just because young teens led the way in computing in the 1980s doesn't mean it should, will or can happen again. Those outside the tech age bubble have better things to do.
  154. "Raspberry Pi - Innovation of the Year". T3 Gadget Awards. Retrieved 9 October 2012.
  155. "Showtime | Crowdfunding the Light". 5 October 2012. Retrieved 17 April 2013.
  156. "Latest Raspberry Pi has double the RAM". BCS website. BCS. 16 October 2012. Retrieved 18 October 2012.
  157. Arthur, Charles (5 March 2012). "Raspberry Pi demand running at '700 per second'". The Guardian. London. Retrieved 12 March 2012.
  158. "Raspberry Pi mini computer sells out after taking 700 orders per second". Digital Trends. Retrieved 9 June 2012.

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