基于PDIUSBD12的驱动源代码 完全可用 接收过程: usbserial模块会在该设备打开时就启动一个urb在那等待设备端发数据过来, 收到数据后就push到上层tty设备的缓冲中去-Fully available based on the PDIUSBD12 the driver source code Receiving process: usbserial module when the device is turned on to start a urb go after t

Demonstrates use of external interrupts. Each time a push button is pressed, the external interrupt INT0 is called, which increments the global variable led and outputs its value to port B. For simplicity, no de-bouncing is implemented.