1、时钟配置和CLKOUT

代码说明：

说明：  配置系统的时钟，用于单片机的学习，基于开发板LPC1114,程序虽然比较小，却是一个完整的模块，可以作为一个模板，在此基础上添加其他外设及相关编程。(Configuring the clock of the system is used for the learning of MCU. Based on the development board LPC1114, the program is relatively small, but it is a complete module, which can be used as a template, on which other peripherals and related programming are added.)