（1）、分别用C语言和汇编语言编程完成硬件接口功能设计；

（2）、硬件电路基于80x86微机的接口电路；

（3）、程序功能要求：小键盘给定、数码管（屏幕）显示，并产生对应信号

波形（D/A）输出（信号波形包括正弦波、三角波、方波、锯齿波）、输出信号波

形幅度、频率可调（注意：按键数量应尽量少）。 -(1), respectively, in C and assembly language programming to complete the functional design of the hardware interface

(2), the hardware circuit based on the 80x86 microprocessor interface circuit

(3), the program function requirements: the keypad is given, the digital tube (screen) display, and generate the corresponding signal

Waveform (D/A) output (signal waveforms including sine, triangle, square wave, sawtooth wave), the output signal wave

Shaped amplitude, frequency is adjustable (Note: the number of keys should be minimal).