Method for avoiding data collision in half-duplex mode using direct memory access logic

摘要

A method for avoiding data collision in a half-duplex mode using a DMA logic for multi-point linked processors is disclosed. According to the disclosed method, a transmitting processor holds a request-to-send (RTS) signal in an active state for a prescribed period of time so that a transmitting DMA logic of a receiving processor can be initiated after the operation of a receiving DMA logic of the receiving processor is terminated. Since the Tx DMA logic of the receiving processor starts data transmission after the Rx DMA logic of the receiving processor completes receiving of data, data collisions occurring in the receiving processor due to the concurrent operation of the Tx DMA logic and the Rx DMA logic can be prevented.