libopencm3 for the license-sensitive Cortex-M developer

April 12, 2015



I was thinking of starting a new open source project that should run on STM32 boards, and I realized that it would need a lot of low level code that accesses many different peripherals. One of the first libraries that comes to mind, and I bet it’s the same for many Cortex-M developers, is ARM CMSIS. ARM […]

Posted in: Embedded

Nand2Tetris course is starting on Coursera

March 30, 2015


Nand2Tetris banner

Nand2Tetris is a famous learning resource that teaches computing from the ground up, where the bottom brick that is used to build anything is the digital NAND port. It teaches the basics of Hardware Description Languages (such as Verilog and VHDL), and applies it to build a processor. It then guides into writing an assembler […]

Posted in: Hardware

Installed Debian on Acer Aspire One 522 netbook

March 1, 2015



My mother has an Acer Aspire One 522 netbook (as for the post title) and used it to surf the net and play some Facebook games… until it fell hard while it was on, and it wouldn’t boot any more: it would get stuck on the boot screen where you can tap F2 to enter […]

Posted in: Software 2015 Keynote: Linus Torvalds

January 21, 2015



The conference has been held last week in Auckland. The videos of the conference have been published, and among them I saw the segment starring Linus Torvalds. The keynote was moderated by Andrew Tridgell, and the participants were Linus, Bdale Garbee and Paul “Rusty” Russell. Here is an outline that I hope can be useful if you don’t have time […]

Posted in: Software

Nostalgia trip: QBasic game programming

January 18, 2015


PIXELPlus 256 running in DOSBox.

After I wrote my last post I couldn’t stop thinking about old days, and how I programmed in the early nineties, when I was around ten years old. I used to write small games for myself, but I spent far more time coding than ultimately playing them, because creating was the fun part, understanding what the computer […]

Posted in: Software

Paul Graham – What Doesn’t Seem Like Work?

January 17, 2015



Paul Graham suggests that, when we find a task that entertains us to the point that we are eager to do it, and when people around us doesn’t seem to approach that same task with the same enthusiasm, then we have found a clue. It’s a clue that points towards a direction that could very well […]

Posted in: Working

Using a rain sensor with Arduino Uno in C

December 23, 2014


Arduino Uno rain sensor application

An application written in C that interfaces a rain sensor to Arduino Uno by reading digital and analog signals, and visualizing the levels on a PWM-driven LED and a serial terminal.

Posted in: Hardware

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