The first task at hand is to set up the endpoints appropriately for this example. The following code switches the CPU clock speed to 48 MHz (since at power-on default it is 12 MHz), and sets up EP2 as a Bulk OUT endpoint, 4x buffered of size 512, a

Synchronous FIFO (one clock)

包括了Clock,，FIFO，LRU，OPT，随机替换五种页面置换算法-Including the Clock, the FIFO, LRU, OPT, randomly replace the five page replacement algorithm