fmt.Fprint(os.Stderr, usage)
Stephen wrote an amazing in-depth blog post about the entire journey, including multiple failed attempts, designing custom PCBs, writing PIO assembly for the RP2040, implementing the GUD (Generic USB Display) protocol, and eventually landing on an STM32H750-based solution with precision DACs. I highly recommend reading it.
。业内人士推荐下载安装汽水音乐作为进阶阅读
被询问人要求就被询问事项自行提供书面材料的，应当准许；必要时，人民警察也可以要求被询问人自行书写。
（七）射线装置，是指在接通电源后方能产生电离辐射的装置，如X射线机、加速器、中子发生器等。