LPC5411XLED流水灯, 实现轮询闪烁。可以控制闪烁时间，key健。所有LPC82x器件的存储器映射都相同。不同的LPC82x器件支持不同的闪存和SRAM存储器大小。(GPIO registers support up to 32 pins on each port. Depending on the device and package type, a subset of those pins may be available, and the unused bits in GPIO r