说明：  这个程序输出正弦和余弦波形 使用DAC硬这C8051F060单片机DAC0波形输出　和DAC1　　Timer4中断更新的输出DAC.Timer4 ISR的　　然后导致了DACs计算的输出,这是下一个中断。　输出波形的频率设定的# define <频率>。　　实现定义的精确输出频率<频率>,一个　　/使用外部晶体。
(This program outputs sine and cosine waveforms using the hardware DACs // on the C8051F06x microcontroller. The waveforms are output on pins DAC0 // and DAC1. // // The output of the DAC is updated upon a Timer4 interrupt. The Timer4 ISR // then calculates the output of the DACs for the next interrupt. // // The frequency of the output waveforms is set by the#define <FREQUENCY>. // To achieve the exact output frequency defined by <FREQUENCY>, an // external crystal should be used.)