HMR3300系列的数字罗盘的控制显示程序，可以从计算机界面输入命令，对电子罗盘航向和磁度计显示进行选择，读出数据返回显示 界面。-Series of HMR3300 digital compass control display program, you can enter the command from the computer interface, the electron and magnetic compass heading select meter display, back d