Now any compiler or application software just grabs the scan code from the ESC key and tailors the action to what it wants. Nothing wrong with that.
当今的编译器或应用程序都会抓取esc键释出的扫描指令，并定制相应的操作。这没有什么问题。
For excellent and sufficient reasons, its keys emitted not the character itself but a "scan code", which was then remapped to the hardware level, just as a compiler would.
有充分的理由支撑，它(IBM PC)的ESC键释出的不是字符本身，而是一个“扫描指令”。随后这个指令被映射至硬件层面，就像编译器所做的。
Specifies a hardware scan code for the key.
指定键的硬件扫描码。
NIOS-based keyboard scan code. Be achieved with the query in this case!
说明：基于NIOS的键盘扫描代码。本例用查询方式实现！
433MHz wireless transmission, scan code configuration, camera linkage shooting alarm push to the phone.
扫码配置，摄像机联动拍摄报警推送至手机。
Specifies the repeat count, scan code, extended-key flag, context code, previous key-state flag, and transition-state flag.
指定重复次数，扫描代码，扩展键标志，上下文代码，前期的键状态标志，转换状态标志。
Assigned to each key on a keyboard is a unique value called a scan code, a device-dependent identifier for the key on the keyboard.
中文翻译：键盘上的键都分配有一个独一无二的扫描码，即和设备相关的标识符。
By contrast, PC keyboards are not only cheap, stable and reliable but also a kind of coded keyboard which can be scanned and send the scan code via a standard 5 core socket automatically.
PC用键盘则恰恰相反，不但价格便宜，稳定可靠，而且是编码键盘，可自动扫描键盘并通过键盘用标准5芯插口发送按键的扫描码。
By contrast, PC keyboards are not only cheap, stable and reliable but also a kind of coded keyboard which can be scanned and send the scan code via a standard 5 core socket automatically.
PC用键盘则恰恰相反，不但价格便宜，稳定可靠，而且是编码键盘，可自动扫描键盘并通过键盘用标准5芯插口发送按键的扫描码。
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