使用 Arduino Uno 生成短脉冲 第 1 部分:digitalWrite() 脉冲宽度
当你使用以下代码在 Arduino Uno 上生成数字脉冲(cli() 和 sei() 用于禁用和启用中断以确保一致的脉冲宽度)时:
pulse_digitalwrite.ino
cli();
digitalWrite(outputPin, HIGH);
digitalWrite(outputPin, LOW);
sei();digitalWrite() 所需的时间占主导。基于 ATMega328p 的 16 MHz 时钟频率,这会生成长度正好为 4 微秒的脉冲:

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