| 摘要 |
PURPOSE:To remove influences upon a self-processor and to process a receiving request from another processor immediately to reduce the delay of communication between the processors by changing a input velocity according to a receiving quntity. CONSTITUTION:A bus controller BC controls a signal distributing device SD and outputs receiving signals to processors P0-pn. Each processor executes scanning periodically by a scanner SCN, detects the communication request from the bus controller BC, inputs the data, and simultaneously writes the existence of the receiving request in the current period. The processor P0 scans again in the succeeding period, and when a receiving request exists, discriminates the existence or absence of the the preceeding receiving signal. If the receiving signals are inputted twice continuously, the processor P0 executes the receiving processing quickly by shortening the finishing period with high priority and increasing the receiving speed. If the receiving signals are not inputted twice continuously, the processor P0 is returned to a long period program with low priority. |
