The design of a remote control signal source based on SPI bus

This paper presents a design which use single-chip microcomputer as the core of the signal source remote control circuit, The signal source can generate four basic waveforms, there are square, triangle wave, sawtooth and sine wave. It can also realize the remote signal circuit switching output signal type and adjusting frequency by means of the host computer digital command, this design of control circuit has the characteristics of high precision, high reliability and long communication distance.