基于LPC2148的ucos2操作系统，包括基本的UART、SPI、IIC、RTC、LCD显示功能-Based on the LPC2148 ucos2 operating system, including basic UART, SPI, IIC, RTC, LCD display function

lpc2148 SPI初始化，有备注说明，对于初学者非常有益-lpc2148 SPI initialized, Remarks, very useful for beginners