SPI (serial peripheral interface) bus topology, SPI bus node equipment and communication method thereof
The invention provides an SPI (serial peripheral interface) bus topology, SPI bus node equipment and a communication method thereof. The SPI bus node equipment comprises an SPI bus interface, a data receiving cache, a data sending cache, a CANopen protocol unit and a memory. The CANopen protocol unit is connected with the data receiving cache and the data sending cache, and a CANopen protocol in the CANopen protocol unit enables the SPI bus node equipment to follow the CANopen protocol to send and receive data on an SPI bus protocol. The memory is connected with the CANopen protocol unit and stores an object dictionary which is used for data exchange with an application layer. The SPI bus node equipment and the SPI bus topology have higher reliability and universality.