"基于51单片机的波形发生器设计与实现"

The waveform generator based on the 51 single-chip microcontroller is designed to generate various waveforms using digital-to-analog conversion and operational amplifiers. The system utilizes the C8051 microcontroller as the control core to produce digital signals, which are then converted into analog signals by the DAC0832. The output voltage is obtained by converting the output current using an operational amplifier. The waveform is displayed on an LCD1602 screen, showing the waveform shape, amplitude, and frequency. Independent buttons are used for waveform selection, adjusting the amplitude, and frequency. The system's operation is based on MATLAB, where samples of sine waves, triangular waves, and square waves are collected and stored in arrays for waveform synthesis. Interrupts are used to scan through the arrays for generating waveforms. Frequency adjustments are made by changing the interrupt interval time, while amplitude changes are achieved by altering the digital values (and multiplying them by a factor less than 1). The system uses 20 points for waveform synthesis. Key components of the design include the AT-89C51 microcontroller, DAC0832 digital-to-analog converter, independent buttons for control, and the OP07 operational amplifier. The system combines the functionalities of these components to produce various types of waveforms with adjustable amplitudes and frequencies. The waveform generator based on the 51 single-chip microcontroller provides a versatile and efficient solution for generating waveforms in electronic applications.