February 7, 2013

Raspberry PI : How it all began

Filed under: Raspberry 3.14 — Tags: , , , , , , , — admin @ 8:26 am

I’m a newbie in the world of Linux, but i could’nt resist to try the raspberry Pi , model B.
It came that,for a project, i needed a kind of industrial PC , but i was puzzled by the pricing of that devices.
Surfing around i finally found the RasPI , based on an ARM controller. I decided then to dive into the ARM sea, using my past experience with Microchip pic series, C / C++ programming, and my hardware knowledge.

Let’s start !

The RasPi comes with nothing but the PCB itself.
To let it run, you need :

  • PC monitor or TV with HDMI input ( and and DVI to HDMI cable or adapter)
  • USB keyboard (and USB mouse)
  • Internet (ethernet) link
  • SD card wich will behave like a HDD for the OS
    (and thats great : no mechanical parts - a rock solid-state SSD-like drive ! )
  • A 5V power supply (else you will need to plug the rasPi to your computer’s usb port to get power from it )

Notice that the internet connection is needed to update the linux kernel when installing for the first time.

I purchased my RasPi model B from farnell, and i needed to have a quick ready-to-go configuration, so i decided to purchase also a 4GB SD card , containing the RaspBIAN OS ( debian for raspberry distro )  , wich was available at this time on farnell also.

Once everything was plugged, i ended with that thing :

On this picture you can see the yellow ethernet cable, the 2 usb cables to keyboard/mouse , the dvi cable , the blue SD card ( the socket is located on the bottom side of the RasPi pcb) , and the mini-USB cable just next to the SD , used to power the RasPI.

After power on, follows a (long) start sequence. it’s the first time booting, and a lot of things get adjusted . the next reboots are much faster than the first one.

There’s allready a plenty of articles dealing with the basic configurations of the RasPI ( keyboard mapping , set locale , boot options ) so i will not spend more time writing about that things. that settings are pretty easy to understand .

Once configured, the RasPI console looks like that ( the monitor is a FLATRON W2242T ) :

And the “LXDE” desktop  looks like that :

Opened apps : LX console in front , and Nano text editor


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