2 篇文章
为什么需要学驱动开发？ 做嵌入式开发这么久，一直都是在用户空间折腾：写应用、调库、玩框架。但有时候你会发现，有些功能用户空间就是搞不定——比如精确的时序控制、直接操作寄存器、或者硬件中断处理。这时候，你就需要踏入内核空间，写驱动了。 很多人对内核驱动有畏惧心理，觉得"内核编程很危险，搞错了系统就挂了"。确实如此，但没那么可怕。今天我们就从零开始，写一个最简单的字符设备驱动，让你迈出第一步。...
Why learn driver development? Having worked in embedded development for so long, I've always been working in user space: writing applications, calling libraries, playing with frameworks. But sometimes you'll find that some features just can't be handled in user space—like precise timing control, direct register operations, or hardware interrupt handling. At this point, you need to step into kernel space and write drivers. Many people are intimidated by kernel drivers, thinking 'kernel programming is dangerous, if you mess up the system will crash.' That's true, but it's not that scary. Today we'll start from scratch and write the simplest character device driver to help you take the first step...