The design uses a microcontroller STC12C5A60S2 and interface unit circuitry.The car lights switch generates the input signal

the microcontroller sends CAN messages according to the switch status through the CAN bus module.Light control module chip receives the control packets via CAN module and controls the corresponding lights to work according to packets of information.The system components and the overall program

the selection of main components are described

focusing on the hardware connection scheme

and the optimal design is proposed.Software is designed in module

divided into three modules

the initialization module

sending module

receiving module.Through the joint modulation of hardware and software

the key switch input control the corresponding light bulb off is achieved.Tests show that the system is simple

reliable

and has broad application prospects.