开发环境为RVDS4.0，基于开发板Tiny6410，裸机程序，该程序涉及内容按键、中断、串口打印。 按键通过外部中断方式来控制，且串口打印按键信息；当按下K1，串口打印：Key1 is push down!，然后四个用户led显示为流水灯；当按下K2，串口打印：ey2 is push down!，然后led全灭；当按下K3，串口打印：Key3 is push down!，然后led全；当按下K4，串口打印：Key4 is push down!，然后beep响一声；-Development environment for RVDS4.0, based development board Tiny6410, bare metal program that involves content button, interrupts, serial printer. Buttons to control via an external interrupt and serial print key information　When you press K1, serial print:! Key1 is push down, and then displayed as four user led light water　When you press K2, serial print: ey2 is push down !, then led all off　When you press K3, serial print:! Key3 is push down, then led the whole　When you press K4, serial print:! Key4 is push down, then beep beep