Slashdot Mirror
Domain: sics.se
Stories and comments across the archive that link to sics.se.
Stories · 25
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TwIP - An IP Stack In a Tweet
Adam Dunkels writes "Inspired by the Twitter-sized program that crashes Mac OS X, I just wrote a really, really rudimentary IP stack called twIP, small enough to fit in a Twitter tweet. Although twIP is very far away from a real IP stack, it can do the first task of any IP stack: respond to pings. The entire source code can be found in this 128-character-long tweet. For those who are interested in low-level network programming, a code walkthrough with instructions on how to run the code under FreeBSD is available here. The FAQ: Q: why? A: for fun." -
TwIP - An IP Stack In a Tweet
Adam Dunkels writes "Inspired by the Twitter-sized program that crashes Mac OS X, I just wrote a really, really rudimentary IP stack called twIP, small enough to fit in a Twitter tweet. Although twIP is very far away from a real IP stack, it can do the first task of any IP stack: respond to pings. The entire source code can be found in this 128-character-long tweet. For those who are interested in low-level network programming, a code walkthrough with instructions on how to run the code under FreeBSD is available here. The FAQ: Q: why? A: for fun." -
TwIP - An IP Stack In a Tweet
Adam Dunkels writes "Inspired by the Twitter-sized program that crashes Mac OS X, I just wrote a really, really rudimentary IP stack called twIP, small enough to fit in a Twitter tweet. Although twIP is very far away from a real IP stack, it can do the first task of any IP stack: respond to pings. The entire source code can be found in this 128-character-long tweet. For those who are interested in low-level network programming, a code walkthrough with instructions on how to run the code under FreeBSD is available here. The FAQ: Q: why? A: for fun." -
A Twitter Client For the Commodore 64
An anonymous reader writes "Johan Van den Brande has developed a Twitter client for the Commodore 64, allowing 140-character messages to be posted directly from this TV-connected 1982 home computer. This YouTube video shows how the Twitter client is — slowly! — loaded from a 5.25" floppy disk, how the latest Twitter messages are downloaded and shown on the TV screen, and how this tweet is posted. All that is needed is a C64, a TV, and a C64 Ethernet card. The Twitter client is implemented with the Contiki operating system, which otherwise is used for connecting tiny embedded systems to the Internet." -
World's Smallest IPv6 Stack By Cisco, Atmel, SICS
B Rog writes "Cisco, Atmel, and the Swedish Institute of Computer Science have released uIPv6, the world's smallest IPv6 compliant IPv6 stack, as open source for the Contiki embedded operating system. The intent is to bring IP addresses to the masses by giving devices such as thermometers or lightbulbs an IPv6 stack. With a code size of 11 kilobytes and a dynamic memory usage of less than 2 kilobytes (yes, kilobytes!), it certainly fits the bill of the ultra-low-power microcontrollers typically used in such devices. When every lightbulb has an IP address, the vast address range of IPv6 sounds like a pretty good idea." -
TCP/IP Meets Physical Reality
An anonymous reader writes "When Google is clouding the borderline between web and the desktop, a much, much smaller project is blurring the border between the Internet and the physical reality: the newly released Contiki operating system version 2.2.1. Contiki runs on networked wireless sensors that are used for anything from road tunnel monitoring for fire rescue operations to collecting vital statistics from ice hockey players. These sensors typically have as little as a few kilobytes of memory and a few milliwatts of power budget — a thousandth of the resources of a typical PC computer — yet Contiki provides them with full TCP/IP connectivity. Meanwhile, San Francisco is monitoring parking spaces with wireless technology." -
TCP/IP Meets Physical Reality
An anonymous reader writes "When Google is clouding the borderline between web and the desktop, a much, much smaller project is blurring the border between the Internet and the physical reality: the newly released Contiki operating system version 2.2.1. Contiki runs on networked wireless sensors that are used for anything from road tunnel monitoring for fire rescue operations to collecting vital statistics from ice hockey players. These sensors typically have as little as a few kilobytes of memory and a few milliwatts of power budget — a thousandth of the resources of a typical PC computer — yet Contiki provides them with full TCP/IP connectivity. Meanwhile, San Francisco is monitoring parking spaces with wireless technology." -
Protothreads and Other Wicked C Tricks
lwb writes "For those of you interested in interesting hard-core C programming tricks: Adam Dunkels' protothreads library implements an unusually lightweight type of threads. Protothreads are not real threads, but rather something in between an event-driven state machine and regular threads. But they are implemented in 100% portable ANSI C and with an interesting but quite unintuitive use of the switch/case construct. The same trick has previously been used by Simon Tatham to implement coroutines in C. The trick was originally invented by Tom Duff and dubbed Duff's device. You either love it or you hate it!" -
Hand-made Web Server, Built From 200 TTL Chips
ps writes "Bill Buzbee has constructed a hand-made CPU, complete with hardware address translation, memory mapped I/O, and DMA, out of 200 74-series TTL chips wired together with thousands of individually wrapped wires. By using a port of Adam Dunkels' uIP TCP/IP stack to the Magic-1, it currently serves up live web pages at an amazing speed of 3 MHz. See the website for photos and schematics." -
Adam Dunkels on Embedded Sensor Networks
tl writes "netzstaub has posted an extensive interview with Adam Dunkels, a computer scientist working in the field of wireless sensor networks and author of the open source lwIP and uIP embedded TCP/IP stacks, the Contiki OS, and the Protothreads library. The interview touches on protothreads, sensor networks, TCP/IP, Contiki, and embedded software development. Many Slashdot readers probably remember the tiny Contiki OS from previous articles where, not surprisingly, clustering has been discussed. From reading the interview, it seems Contiki clusters now have come true." -
Adam Dunkels on Embedded Sensor Networks
tl writes "netzstaub has posted an extensive interview with Adam Dunkels, a computer scientist working in the field of wireless sensor networks and author of the open source lwIP and uIP embedded TCP/IP stacks, the Contiki OS, and the Protothreads library. The interview touches on protothreads, sensor networks, TCP/IP, Contiki, and embedded software development. Many Slashdot readers probably remember the tiny Contiki OS from previous articles where, not surprisingly, clustering has been discussed. From reading the interview, it seems Contiki clusters now have come true." -
Adam Dunkels on Embedded Sensor Networks
tl writes "netzstaub has posted an extensive interview with Adam Dunkels, a computer scientist working in the field of wireless sensor networks and author of the open source lwIP and uIP embedded TCP/IP stacks, the Contiki OS, and the Protothreads library. The interview touches on protothreads, sensor networks, TCP/IP, Contiki, and embedded software development. Many Slashdot readers probably remember the tiny Contiki OS from previous articles where, not surprisingly, clustering has been discussed. From reading the interview, it seems Contiki clusters now have come true." -
Adam Dunkels on Embedded Sensor Networks
tl writes "netzstaub has posted an extensive interview with Adam Dunkels, a computer scientist working in the field of wireless sensor networks and author of the open source lwIP and uIP embedded TCP/IP stacks, the Contiki OS, and the Protothreads library. The interview touches on protothreads, sensor networks, TCP/IP, Contiki, and embedded software development. Many Slashdot readers probably remember the tiny Contiki OS from previous articles where, not surprisingly, clustering has been discussed. From reading the interview, it seems Contiki clusters now have come true." -
Adam Dunkels on Embedded Sensor Networks
tl writes "netzstaub has posted an extensive interview with Adam Dunkels, a computer scientist working in the field of wireless sensor networks and author of the open source lwIP and uIP embedded TCP/IP stacks, the Contiki OS, and the Protothreads library. The interview touches on protothreads, sensor networks, TCP/IP, Contiki, and embedded software development. Many Slashdot readers probably remember the tiny Contiki OS from previous articles where, not surprisingly, clustering has been discussed. From reading the interview, it seems Contiki clusters now have come true." -
Adam Dunkels on Embedded Sensor Networks
tl writes "netzstaub has posted an extensive interview with Adam Dunkels, a computer scientist working in the field of wireless sensor networks and author of the open source lwIP and uIP embedded TCP/IP stacks, the Contiki OS, and the Protothreads library. The interview touches on protothreads, sensor networks, TCP/IP, Contiki, and embedded software development. Many Slashdot readers probably remember the tiny Contiki OS from previous articles where, not surprisingly, clustering has been discussed. From reading the interview, it seems Contiki clusters now have come true." -
phpstack - A TCP/IP Stack and Web Server in PHP
Adam Dunkels writes "Following the trend of writing 'inappropriate' programs in the PHP scripting language, I have written a small TCP/IP stack and a web server entirely in PHP. It is extremely stripped down: the IP stack only implements the most basic functionality required for running the web server and the web server cannot handle pages larger than 1.5k. Nevertheless, the stack is able to support an unlimited number of simultaneous TCP connections and the web server has support for PHP scripting. A live demonstration server is up and running the phpstack software." -
phpstack - A TCP/IP Stack and Web Server in PHP
Adam Dunkels writes "Following the trend of writing 'inappropriate' programs in the PHP scripting language, I have written a small TCP/IP stack and a web server entirely in PHP. It is extremely stripped down: the IP stack only implements the most basic functionality required for running the web server and the web server cannot handle pages larger than 1.5k. Nevertheless, the stack is able to support an unlimited number of simultaneous TCP connections and the web server has support for PHP scripting. A live demonstration server is up and running the phpstack software." -
Contiki for Internet-enabled Apple II
indyV writes "Most of you probably remember the Contiki OS which previously have been used to Internet-enable both the Commodore 64 and the 8-bit Atari. This video shows the brand new Apple II Contiki port in action, booting up on an Apple IIe and surfing to www.apple2.org. The network connection was made with a specially crafted Ethernet adapter." -
Contiki for Internet-enabled Apple II
indyV writes "Most of you probably remember the Contiki OS which previously have been used to Internet-enable both the Commodore 64 and the 8-bit Atari. This video shows the brand new Apple II Contiki port in action, booting up on an Apple IIe and surfing to www.apple2.org. The network connection was made with a specially crafted Ethernet adapter." -
Contiki Ported To x86
lt writes "The ultra-small Contiki OS has now been ported to the x86. This should give those of you who have an old x86 PC that is too small to run even the smallest of Linux variants, a chance to browse the web, set up a web server, and doing other essential stuff. If you're curious to see how it looks, there is a live VNC demo running." -
Contiki on Ethernut
randomErr writes "Many of you may remember Contiki, the OS and GUI for the C64 and many other 8 bit platforms, which was posted on Slashdot in March. Adam Dunkels has ported Contiki to a more modern platorm: the open source Ethernut board. You can also see the working webserver and VNC server." -
Contiki on Ethernut
randomErr writes "Many of you may remember Contiki, the OS and GUI for the C64 and many other 8 bit platforms, which was posted on Slashdot in March. Adam Dunkels has ported Contiki to a more modern platorm: the open source Ethernut board. You can also see the working webserver and VNC server." -
Contiki on Ethernut
randomErr writes "Many of you may remember Contiki, the OS and GUI for the C64 and many other 8 bit platforms, which was posted on Slashdot in March. Adam Dunkels has ported Contiki to a more modern platorm: the open source Ethernut board. You can also see the working webserver and VNC server." -
Tutorial On Building Robust Servers In Erlang
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VNC Server for Toasters and Light-Switches
An anonymous reader submits: "How about using VNC to configure your toaster, microwave oven, or even your light-switches? Thanks to Adam Dunkels' micro-VNC server it is now possible to run a VNC server even on really small embedded 8-bit microcontrollers commonly found in such devices. The idea is that even low-cost devices that don't have a screen or graphics hardware could have a GUI, accessible over the network. To show that the server can run with very small amounts of memory, there is a demo server running on a Commodore 64. But the real question is: how would want to 'configure' their toasters using a GUI?"
