ことろ
2.7K posts

ことろ
@_Ko_To_Ro
何か作るのが好き。 プラモデルとか電子工作とか。 ところがX68000 Zが発売されて昔の楽しかった思い出が再燃中。

if you’re getting into embedded systems, learn these protocols in this order: 1. i2c two wires. many devices. perfect for sensors, displays, rtc modules, eeproms master/slave architecture simple to wire, easy to prototype this is where most beginners should start. 2. spi much faster than i2c separate lines for data in, data out, clock, and chip select ideal for displays, sd cards, high-speed sensors more wires, much higher performance when speed matters, spi wins. 3. uart point-to-point communication tx + rx no clock line used for debugging, gps, bluetooth modules, microcontroller communication if you’ve ever opened a serial monitor, you’ve already used uart. learn them in this order: i2c → understand device communication spi → understand high-speed peripherals uart → understand serial communication and debugging these three protocols are everywhere. master them once, and you’ll find them in almost every embedded system you build.

Qドライブは光ディスク系。おじさんがやりがち。 -- NECのPC-98シリーズ等では、MS-DOS等を利用する際、CD-ROMのデフォルトドライブレターが「Q」に設定される仕様が広く採用されていました。 1990年代の話です。。。



ご一読ください!!!!!


なんやかんや、ネットで検索すると日本語資料がでてこないので、手持ちの資料を見ることが多いな😅




remember when 512MB RAM was considered massive? programmers wrote code like every byte mattered. optimized everything. squeezed performance from nothing. suddenly nobody cared about efficiency anymore. just throw more RAM at it, problem solved. now we have 32GB RAM and Slack uses 2GB just to show text messages. Electron apps eat memory like it's free candy. we got better hardware and built worse software. abundance made us lazy.

















