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Preview: Balau

Freedom Embedded



Balau's technical blog on open hardware, free software and security



Last Build Date: Sat, 14 Apr 2018 19:42:17 +0000

 



My Maker Faire Rome 2016makerobotBalauimg_20161015_181100924img_20161015_115056981IMG_20161015_161011067_HDR.jpgIMG_20161014_170024656.jpgIMG_20161014_172129725.jpgimg_20161014_163717828img_20161015_153518129_hdrimg_20161015_132127184_hdrIMG_20161014_164318659_HDR.jpgIMG_20161014_151213889.jpg

Sun, 30 Oct 2016 20:58:19 +0000

Two weeks ago I visited the 2016 edition of the European Maker Faire in Rome. The Rome fair can be reached easily with the train that goes between Rome center (mostly Tiburtina station) and the airport of Fiumicino. The whole fair has ten pavilions, and the Maker Faire managed to fill six of them with all […]


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Maker Faire is coming to RomemakerobotBalaumakerobot

Wed, 28 Sep 2016 19:17:06 +0000

Maker Faire will come to Rome in the weekend of 14-15-16 October 2016, and I plan to go there. The faire format is  by Make Magazine, and gathers the makers from all around the globe, so that they have the possibility to interact and showcase their work and their art. The maker movement has gained traction […]


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Coursera: Development of Real-Time SystemsBalau

Tue, 05 Jul 2016 18:51:15 +0000

A course on the theories and implementations of real-time systems is about to start on Coursera platform. The course comes from the Finnish University Åbo Akademi, and lasts 5 weeks of low workload (2-3h per week). The instructor entices the learner by showing a famous real-time system failure, during the landing of the Apollo 11 on the surface of the […]


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STM32 Nucleo: access SD cards with C standard libraryNucleo board wired with Ethernet shieldBalauNucleo board wired with Ethernet shield.stdio_fatfs381px-SPI_single_slave.svg

Sun, 03 Jul 2016 15:56:59 +0000

The ST Nucleo is an Arduino-like board with an STM32 as the microcontroller, and many Arduino shields can be mounted on it. I recently played with an Ethernet shield for the network connection, but since the shield also contains a microSD card slot, I wanted to access the SD card to read/write files. I’d like to […]


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Phil Koopman: Top 5 Embedded Software Problem AreasBalau

Tue, 31 May 2016 20:30:55 +0000

The following resource is a thoughtful checklist that embedded software developers can take as inspiration to improve the product. It also links to further resources (as well as the author’s book) to explore the topics and analyze in depth the rationale of some of his suggestions. Better Embedded System SW: Top 5 Embedded Software Problem Areas – Five areas to dig into […]


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Migrated from Debian 32bit to 64bit through dual bootopenlogo-100Balaudebian-wheezy-download

Mon, 16 May 2016 19:17:49 +0000

The desktop where I do most of my stuff is a Debian testing 32bit. Recently Google Chrome team declared the end of support of 32bit Linux distributions, and I decided to take the occasion to migrate towards a 64bit Debian. I read some guides around, some old, some with big warnings and disclaimers, some interesting. Ultimately I […]


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Inline assembly in GCC [linux-insides]Balau

Mon, 02 May 2016 19:14:28 +0000

The news site lwn just posted a guide on GCC inline assembly. The guide is written in plain colloquial language and is a great complement to GCC documentation on the matter, which is more of a reference of the various functionalities. I found that the extended form of inline assembly is a powerful way to use the machine special […]


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Linus Torvalds interview at TEDTuxBalau

Mon, 11 Apr 2016 18:57:30 +0000

Chris Anderson, the creator of TED, interviews Linus Torvalds on the traits that are useful to create and maintain something remarkable as Linux. Linus appears as his usual self, joking about his own defects, and being overall very lucid in its analysis of the current status of Linux kernel and what happened to get there. He […]


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Simple time synchronization for the Internet of ThingsNetwork-time-iconBalauNetwork-time-icon

Thu, 18 Feb 2016 21:04:55 +0000

While adding HTTPS capabilities to my STM32 Nucleo board, I needed to solve the problem of current time. This is because TLS needs to check certificate expiration date, so we need a sufficiently accurate estimation of time. So I tried to understand what could I do to ask a network server about the time. I […]


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HTTPS client on STM32 Nucleo-F411REnucleo_w5100BalauNucleo board wired with Ethernet shield.

Thu, 04 Feb 2016 20:59:19 +0000

One of my goal of the past months was to use an STM32 Nucleo board to get a webpage through HTTPS, using an Ethernet shield for TCP/IP stack. I was close last time, but I discovered that my Nucleo-F103RB did not have enough RAM. Now I have my hands on a Nucleo-F411RE that has 128KiB of RAM […]


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