Design of a Protocol for Intercommunication Between USB Devices
Ying Wang · Electronics Optics & Control · 2011
USB devices can only work passively by responding the request of the mainframe.A new communication protocol was presented to meet the requirements of intercommunication between USB devices.The protocol was built up based on traditional USB topology,and a new layer called USB transmittal was added,which acquires the requests of USB devices via polling,and transmits data via mainframe.To build a reliable communication link for USB devices,the function of each layer of the protocol was partitioned,and the data packet formation of USB transmittal layer was designed.In comparison,this protocol could deal with communication of USB devices automatically,while the USB OTG need to set up master/slave mode of USB devices manually.Simulation experiments showed that reliable communication between USB devices can be implemented through the protocol.