METHOD OF ERROR DETECTION AND RESTORATION IN MULTI-POINT TYPE HDLC BUS

摘要

The present invention relates to H. D. elssi (HDLC) bus error detection and recovery methods of a specific block that is abnormal to occupy the bus in use. Error detection and recovery methods of a multi-point method HDLC bus according to the present invention, in one of the master board (master board) and a plurality of slave boards (slave board) error detection and recovery methods of a multi-point method HDLC bus connecting each slave board is a first step of the transition when the abnormal operation by checking that the account for the bus over a predetermined time by using a BUSY (bus occupied) signal the BUSY signal and the CTS signal to terminate the bus occupation is forced to a High state .; To recover the abnormal operation of the bus a second step in which the slave boards by the HDLC FPGA logic generates a reset (reset), and reset the interrupt for the resource driver (FCC or SCC); If the abnormal operation of the bus to continue the slave board to create a REQ signal and a BUSY signal to prevent the bus occupation is forced to a High state, to set the error bit to 1 in that it comprises a third step of transmitting to the master board It characterized.