μCOS-II下LPC210x的UART0底层驱动，用于UART串口通信- COS-II under LPC210x UART0 bottom of the drive for the UART serial communication

串口计算器，可以实现加、减、乘、除、括号、sin（）、cos（）等基础运算，支持浮点数和整数，以LCD显示，有报警功能。-Serial calculator can add, subtract, multiply, divide, brackets, sin (), cos () and other basic operations, support for floating point and integer, with LCD display, alarm function.