提出一种USB总线转CAN总线的接口方案。其中主要论述其硬件电路、软件编写及驱动软件。该方案选用单片机加独立CAN总线控制器的模式实现不同总线间的数据通讯,此方案在电路小型化和电路可靠性等方面有独特优势,实现USB接口与工业现场中的CAN总线网络相互通信,拓展CAN总线应用范围,具有一定的市场前景。 Proposed a USB bus to CAN bus interface program. The main discussion of its hardware circuits, software and driver software. This scheme chooses the mode of one-chip computer and independent CAN bus controller to realize the data communication among different buses. This scheme has unique advantages in circuit miniaturization and circuit reliability. It realizes the mutual communication between USB interface and CAN bus network in industrial field, Expand CAN bus application range, have certain market prospects.