January 2024
Beginner to intermediate
560 pages
8h 38m
Japanese
Content preview from Raspberry Piクックブック 第4版
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10章 ハードウェアの基本Hardware Basics
この章では、Raspberry Piの汎用入出力（GPIO）コネクターを設定し、利用するための基本的なレシピを紹介する。このコネクターを使って、さまざまな興味深い電子回路をRaspberry Piと接続することができる。
レシピ10.1：GPIOコネクターのピン配置
●課題 GPIOコネクターに電子回路を接続したいので、すべてのピンの役割を知っておきたい。
●解決 Raspberry PiのGPIOコネクターには、実際には3つのバージョンがある。無印Raspberry Piの26ピンのレイアウトが2種類と、「プラス」以降のモデルの40ピンのレイアウトだ。
26ピンのRaspberry Piは実用的なコンピューターというよりも骨とう品に近いものだし、低速で多くのソフトウェアと互換性がない。そのため、実用的な見地からはRaspberry Pi 4以降、あるいは少なくともRaspberry Pi 3を使ったほうがいいだろう。
図10-1に、現在の40ピンのレイアウトを示す。最新のRaspberry Pi 5に至るまで、40ピンのGPIOコネクターのあるRaspberry Piのピン配置はすべて同じだ。
上側の26ピンは、オリジナルのRaspberry PiモデルBリビジョン2の26ピンと同じになっている。このため、40ピンのRaspberry Piモデルでも26ピンのRaspberry Pi用に設計されたハードウェアやソフトウェアが使える。40ピンのコネクターで増えたピンは、GND接続が3本とGPIOピンが9本だ。ID_SDピンとID_SCピンは、特別なシリアルメモリーチップとの通信用で、このチップは例えばHAT（Hardware ...
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