Methods and systems for transferring data between a processing device and external devices

摘要

An array data processor employs a plurality of address generators for communicating between groups of the data processors and external devices. In another aspect, the data processor employs a buffer system having a plurality of pointers that allow for retransmission of data from the buffer upon transfer failure.

主权项

1. A method for operating a system, the system comprising:
a data processor, the data processor having at least one arithmetic-logic unit and at least one cache; a bus system connecting the data processor to a receiver, the receiver comprising at least one of an external memory and an external peripheral;
the bus system comprising a buffer memory; the buffer memory having three associated pointers:
i. a first pointer to point to the buffer from which data is output from the buffer;ii. a second pointer to point the buffer location to which data is input to the buffer; andiii. a third pointer to store the value of the first pointer at the start of a data transfer;wherein the method of operations comprises:
a. storing transfer data in the buffer memory;b. transmitting data to the receiver;c. the receiver transmitting information as to whether a data transfer was successful or has failed;d. if the transfer has failed, repeating the transfer of data from the buffer position indicated by the third associated pointer by resetting the first pointer with the value of the third.