通过串口xmodem升级lpc2103的flash。这是一个小的bootrom。开发环境是keil-Through the serial port xmodem upgrade lpc2103 a flash. This is a small bootrom. Development environment is keil

实现电信“应用内计费”功能，在游戏道具付款中可以使用。-To realize application in telecom billing function, can use in the game props for payment.