Archive of software

Debugging AVRs (without Atmel Studio) Thumbnail

Debugging AVRs (without Atmel Studio)

Posted by ian.rees on December 07, 2015 in Projects tagged with , , , , , , , ,

This post is somewhere between a guide and a collection of notes, aimed at debugging programs for AVR microcontrollers (like the ones in most Arduinos) "on target". We'll be using an AVR Dragon connected to the target micro via the normal 6-pin programming header, with a Mac or Linux PC as the host. Although this is a bit more advanced than most of our other projects, it's really quite approachable and is a very powerful technique for fixing AVR software problems. From a high level; we'll use a debugging program on a Mac (or Linux, Windows, etc) "host" computer, which communicates with a Dragon "In Circuit Emulator" (ICE) via USB to debug a buggy program running on the "target" AVR, which is presumably running in some circuit we're interested in. Small variations might apply for Windows hosts, using JTAG instead of DebugWIRE, other debugger tools (Atmel JTAGICE mkII for example), etc.

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Arduinos and Macs Thumbnail

Arduinos and Macs

Posted by ian.rees on August 08, 2015 in Projects tagged with , ,

This evening, I finally got around to unwrapping the Arduino clone that came with my DSpace membership. Starting a project for the board couldn't be easier, using the nice Arduino IDE from https://www.arduino.cc, but I ran into a little snag when it was time to upload the program onto the board. It turns out that these clone Arduinos use a newish low-cost USB to serial converter chip called a CH340G, rather than the FTDI brand chips used in the genuine Arduino boards. The CH340G that isn't supported by MacOS by default, and I use MacOS, so the board didn't show up in the Arduino application's list of serial ports... Fortunately, other folks have run into the same problem and have written up some nice blog posts on how to solve exactly this issue!

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Talk: OpenWRT Thumbnail

Talk: OpenWRT

Posted by Micheal Hamel on August 08, 2011 in Talks tagged with , , , ,

OpenWRT: thats an odd name... The story starts late 2002 when Linksys released a wireless router called the WRT54G. Andrew Miklas noticed (from the visible names used in the internal filesystem, amongst other things) that it was using Linux, without in any way acknowledging this or making the source available. They had obvioulsy modified Linux to get it to run on their hardware. This is a violation of the Linux license, the GPL. He tried contacting Linksys who weren't immediately co-operative, so he posted to the Linux Kernel mailing list and Linksys came under considerable pressure to release their source. Linksys then released the source, and people started rebuilding and fiddling with it. They actually had started patching the binary firmware before Linksys did this. A number of different projects appeared, one was OpenWRT which is first named as such in Jan 2004. So its 7-8 years old.

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Talk: Introduction to JavaScript & Web Development Thumbnail

Talk: Introduction to JavaScript & Web Development

Posted by Blair McBride on April 27, 2011 in Talks tagged with , , , , , , ,

Learn the basics of JavaScript, HTML and CSS in web development to build a simple to-do list webapp.

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Talk: Introduction to JavaScript & Firefox Add-on Development Thumbnail

Talk: Introduction to JavaScript & Firefox Add-on Development

Posted by Blair McBride on April 12, 2011 in Talks tagged with , , ,

Learning the basics of JavaScript and Firefox add-on development by building two simple Firefox add-ons.

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