February 2015
Intermediate to advanced
200 pages
4h 48m
Japanese
Content preview from Bluetooth Low Energyをはじめよう
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
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組み込みツールチェイン
mbedは有効な組み込み開発プラットフォームであり、プロトタイプから製品への明確な
パスを提供してくれるが、どんなベンダー中立な高レベル APIやプラットフォームであっても
低レベル詳細実装のコントロールが多少なりとも犠牲になってしまうことは避けられない。
一般的には、使いやすさのためにコードやドライバの低レベルでの最適化が失われること
になる。このトレードオフは多くの状況で道理にかなうものだが、組み込み開発すべてに
適用できるようなアプローチではないことも明らかだ。
製品設計の世界では、使いやすさよりも性能や制御性が優先されることが多いし、今で
も技術者の多くは実装の詳細をすべて自分でコントロールし、独自の低レベルドライバを
作 成したり独 自 のビルド 環 境を準 備したりすることを 好 んでいる。独 自 の 低レ ベ ルドライバ
を書くには開発工数がより多く必要となるが、製品で動作するコードを最大限コントロール
できることも確実になる。またプロセッサをより詳細に理解する必要があるので、性能やコ
ストの大幅な最適化が可能となる。
組み込み製品の場合、サイズと性能についてコードを完全に最適化できることは非常
に重要だ。例えばコードサイズを最適化すれば、小規模で安価なプロセッサを使えるため、
部品費用が2ドル から 3ドル節約でき、結果的に小売価格が5ドルや 10ド ル 、あ る い は そ れ
以上違ってくることも珍しくない。このようなコストの節減が、製品が成功するか
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.