Some books regarding the Operating Systems internals:

Japanese:
①30日でできる! OS自作入門
②12ステップで作る組込みOS自作入門
③実用 組込みOS構築技法―情報通信を支える基礎技術RTOS入門
④SuperHで学ぶμITRON仕様OS―リアルタイムOSの動作原理と実装法がわかる!
⑤自分で作るLinux OS
⑥自分で作るLinux OS 最新版

English:
①Building a Real Time Operating System: RTOS from the Ground Up by Colin Walls
②Simple Real-Time Operating System: A Kernel Inside View for a Beginner By Chowdary Venkateswara

Initiative book for electronics:
①図解 つくる電子回路

Microcontrollers of this year

Kinetis K10, K20, K30, K40, K50, K60

AVR



Kits:
ATMEL AVRスタータキット
http://akizukidenshi.com/catalog/c/cavrw/

How system calls implemented in RTOS

Apart from the scheduler, how system calls are implemented in Real-Time Operating Systems?

JAVA in Embedded

Conventional Embedded systems involved only C and assembly languages. Now a days, the requirements for embedded systems widened beyond C and Embedded Database, Java and C++ in embedded systems become hot topics. So, let's update about the latest trends.

About Java in Embedded Systems:
http://www.netrino.com/Embedded-Systems/How-To/Embedded-Java

For more information about Java in Embedded:
http://www.netrino.com/taxonomy_menu/3/11

Read 555 timer first

555 timer is used in many electronics project. So, first read about it and learn how to set the resistors to generate the waveform.

Read this:
http://www.sentex.ca/~mec1995/gadgets/555/555.html

Challenges in porting Android in non-handset applications

http://embedded-computing.com/challenges-porting-android-non-handset-applications

Embedded system Power Consumption

http://www.mentor.com/resources/techpubs/upload/mentorpaper_68962.pdf

RTOS metrics

・Memory footprint → memory usage, RAM & ROM requirements
・Latency
    ・Interrupt latency
    ・Scheduling latency
・Services performance→Minimum time taken by a system call

Embedded Microprocessor Benchmark Consortium (EEMBC)

http://www.mentor.com/resources/techpubs/upload/mentorpaper_69305.pdf

Interesting Story: Android

http://en.wikipedia.org/wiki/Android_(operating_system)

From RTC magazine,

"Certainly, Android is not ideal for all types of device designs. It presents a dazzling array of features and capabilities for mobile/wireless devices and an attractive OS option for other intelligent devices. In particular, Android is a viable alternative for designs that benefit from a graphical user interface, field-upgrade capability, a complement of ready-to-use applications, and both Java-style and native C/C++ runtimes.

It is a less attractive choice for

• Headless devices
• Devices with extremely limited RAM and persistent storage
• Closed-box designs
• Legacy support for RTOS APIs and other specialized interfaces
• Systems with pervasive hard real-time / low-latency response needs
• Designs built on “minority” CPU families or special-purpose silicon"

THE DALVIK VIRTUAL MACHINE ARCHITECTURE

Know about Dalvik garbage collection

http://davidehringer.com/software/android/The_Dalvik_Virtual_Machine.pdf

What does GDB(GNU Debugger) with PowerPC?

http://devpit.org/wiki/GDB

Scheduling algorithms for Real-Time embedded processing

Good Introduction to Rate Monotonic scheduling algorithm.
http://www.netrino.com/Embedded-Systems/How-To/RMA-Rate-Monotonic-Algorithm

Know about other scheduling algorithms.

A good insight.
http://www.csie.ntu.edu.tw/~ktw/rts/ch-short-course-uni.pdf

Theory about other scheduling algorithms.
http://www.dauniv.ac.in/downloads/EmbsysRevEd_PPTs/Chap_8Lesson22EmsysNewOtherScdmethods.pdf

Perl for the day: while loop construct

use strict;
use warnings;

# to play cricket in my perl program

print "\nPress any of 0 to 9\n\n";

use Term::ReadKey;
my $bat = 1;
my $player;
my $num;
my $team;
my $ran = 0;
my $spot = 0;
my @res;

ReadMode 'cbreak';

while (++$spot < 3) {
    print "Team: ", $spot, "\n";
    $num = 0;
    $team = 0;
    while (++$num < 11) {
        print "    Player ", $num, ": ";
        $player = 0;
        while ($bat != 0) {
            $bat = int(ReadKey(0));
            $ran = int(rand(12345)) + $bat;
            $bat = $ran % 6;
            if ($bat != 0) {
                print $bat, "+";
            }
            $player += $bat;
        }
        print "=", $player, "\n";
        $team += $player;
        $bat = 1;
    }
    print "  Total score = ", $team,"\n";
    $res[$spot] = $team;
}
if ($res[1] > $res[2]) {
    print "Team 1 Won\n";
} elsif ($res[2] > $res[1]) {
    print "Team 2 Won\n";
} else {
    print "Match Tie\n";
}

Perl for the day: for loop construct handling array

use strict;
use warnings;

# fibonacci sequence/series using array in Perl

my $i;
my @ser = (0, 1);

for ($i = 2; $i < $ARGV[0]; $i++) {
    $ser[$i] = $ser[$i - 1] + $ser[$i - 2];
}

for ($i = 0; $i < $ARGV[0]; $i++) {
    print $ser[$i]," ";
}

dcbst - Data Cache Block Store instruction in PowerPC

If the byte specified by the effective address (EA) is cached by the data cache and the cache-line is modified (dirty), the entire contents of the cache-line are written to system memory. After the store completes, the cache-line is marked as unmodified (not dirty). But, the cache-line is not invalidated