Marcelo Toledo

startups, empreendedorismo e tecnologia

EarthLink to Remove Philadelphia Wi-Fi

According to PC World: EarthLink next month will shut down its Philadelphia Wi-Fi network, the flagship of its now-dashed municipal wireless initiative, and then remove it from the city’s street lights. It’s sad to hear this, means that yet, Muni Wi-Fi, is just a dream and no one found a model that works. What I want to know is, WiMax is trying this same model, what’s gonna be different? Why is it going to work?

Embedded Linux Conference 2008

Rafael Ugolini sent me these awesome links about Embedded Linux Conference 2008, all the videos and reports (from all years): Videos like… Keynote: The Relationship Between kernel.org Development and the Use of Linux for Embedded Applications, by Andrew Morton (Google) UME – Ubuntu Mobile and Embedded, by David Mandala (Canonical) Back-tracing in MIPS-based Linux Systems, by Jong-Sung Kim (LG Electronics) Using a JTAG for Linux Driver Debugging, by Mike Anderson (PTR Group) … Go check: Videos: http://free-electrons.com/community/videos/conferences/ Reports: http://free-electrons.com/articles/conferences/elc2008-report/

Printing the binary value of an integer

You can printf an integer in many forms, including decimal, octal or hexadecimal. What about binary? This is not the first time someone asks me this, so I’ll just post it here: > ./dec2bin 3 3 -> 00000000000000000000000000000011 > ./dec2bin 4 4 -> 00000000000000000000000000000100 > ./dec2bin 5 5 -> 00000000000000000000000000000101 > ./dec2bin 6 6 -> 00000000000000000000000000000110 > ./dec2bin 7 7 -> 00000000000000000000000000000111 A simple solution could be the function below, note that it is limited to 32 bits: static char *dec2bin(int dec) { char *str, *ret; int i; const int bits = 32;   ret = str = malloc(bits); memset(str,…

Openning big files in OpenOffice Spreadsheet

When your files are too big, OpenOffice Spreadsheet will ignore anything after line 65536, my suggestion is, split it in other tabs: marcelo@yogananda:~/Desktop$ wc -l foo-2008-04.csv 73538 foo-2008-04.csv marcelo@yogananda:~/Desktop$ split foo-2008-04.csv -l 37000 foo marcelo@yogananda:~/Desktop$ ls foo* foo-2008-04.csv fooaa fooab marcelo@yogananda:~/Desktop$ wc -l fooa* 37000 fooaa 36538 fooab 73538 total After this, Insert -> Sheet From File…

Problems to solve with software

My uncle is a person that likes to use technology, he has always the newest computer, television, sound system, etc. I suppose that he has a good camera also, since I’ve just received by email five photos from him, the only problem is that each picture has almost 12MB. Naturally he will share his images with friends and family, the expected result is for everyone to see the images, so it doesn’t need to be that big, as a user of technology he doesn’t need to know that. We see a clear situation where hardware evolves much faster then software,…

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