| 摘要 |
PROBLEM TO BE SOLVED: To reduce the processing load of a microprocessor by simplifying the memory address designation of a ring buffer. SOLUTION: An index I=1 to n is set for each processing block 1 to n of a ring buffer, and addresses A1 to An of each block are set for each index I=1 to n, and an index I=n+1 is set after the index I=n, and the address A1 of the first block and index data '1' indicating the fist index are set in the index I=n+1. An index counter C is incremented, and each block is accessed in a forward direction based on each address by referring to the index I in the forward direction, and the first block is accessed based on the address A1 by referring to the index I=n+1 after referring to the index I=n, and the index counter is returned to '1' based on the basis of the index data.
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