说明：  单片机数字式心率检测仪的程序。四个按键分别可以实现选择选择档位、初始化、测量、显示档位范围功能。同时具有声光报警、掉电存储、上传pc机等功能。
(Microcontroller digital heart rate detector program. Four buttons are selected gear selection can be achieved, initialization, measurement, display stalls range capabilities. Both sound and light alarm, power failure memory, upload pc machine functions.)