"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 output analog waveforms by converting digital signals through a DAC0832. The system also utilizes an operational amplifier (OP07) to convert the output currents into voltage signals. The waveform display is achieved using an LCD1602, which shows the waveform and its amplitude. Independent buttons are used for waveform selection, adjusting the amplitude, and frequency. The core operation of the system involves sampling sine waves, triangular waves, and square waves using MATLAB to obtain data sets, which are then stored in arrays and scanned using interrupts. Frequency adjustment is done by modifying the interrupt interval, while the amplitude is adjusted by scaling the digital values (multiplying by a value less than 1). A total of 20 data points are used for waveform synthesis. Key components of the system include the AT-89C51 microcontroller, DAC0832 digital-to-analog converter, independent buttons, and OP07 operational amplifier.