Preface: Serial communication is very common for all embedded engineers. For a system to interact with the outside world, it must rely on some means, such as serial port, USB, infrared, GPRS and other
[b]USB Principle and Interface Design[/b] [font=宋体][b]Abstract:[/b]Based on USB1.1, this paper discusses the basic principles, workflow, communication protocols and corresponding key technologies of U
[color=#33463f][backcolor=rgb(250, 250, 250)][font=Arial, Helvetica, sans-serif]Bill Gates recently admitted at a fundraising event that the "Control+Alt+Delete" command that forces users to use three
1. Design requirements: Single-arm wiper, driven by a stepper motor, with a swing angle of +70o and a cycle range of 0.5S~20S. The swing cycle needs to be adjusted according to the data from the rain