TWO-WAY INTERRUPT METHOD OF MASTER/SLAVE STRUCTURE

摘要

PURPOSE: A two-way interrupt method of a master/slave structure is provided to perform an interrupt for transmitting a message from a master to a slave or from the slave to the master. CONSTITUTION: A slave waits data to be transmitted to a master until 'A' plug of an output message information data unit is set as an invalid(S42). If the 'A' plug is set as an invalid, the slave stores a message to be transmitted to the master in the first memory unit(S43). If the data are stored in the first memory unit, the slave sets the 'A' plug of an output message information data unit as a valid(S44), and generates an output interrupt to the master(S45). In addition, the second memory unit temporally storing a message transmitted from the master to the slave, and an input message information memory unit confirming whether a message stored in the second memory unit exists and the message is transmitted to a slave board are provided.