Data communication control system
First Claim
1. In a data communication control system including a first control unit having microcomputer and a second control unit having a microcomputer, said second control unit including means for carrying out a first interrupt processing which starts in accordance with a first timing signal having a first period, and a second interrupt processing which starts in accordance with a second timing signal having a second period, said second control unit includes means responsive to said second interrupt processing to receive data transferred from said first control unit, wherein said first interrupt processing has priority over said second interrupt processing;
- the improvement wherein said first control unit includes means for generating said second timing signal in a manner such that adjacent ones of said second timing signal have values of said second period different from each other, whereby at least one of said adjacent ones of the second timing signal can occur at a time which does not conflict with the first interrupt processing so as to enable the second control unit to carry out the second interrupt processing.
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Abstract
A data communication control system includes first and second control units each having a microcomputer, the second control unit carrying out a first interrupt processing which starts in accordance with a first timing signal having a first period, and a second interrupt processing which starts in accordance with a second timing signal having a second period, the second interrupt processing being for the second control unit to receive data transferred from the first control unit. The second timing signal is generated in the first control unit in such a manner that adjacent ones of the second timing signal have values of the second period different from each other. Therefore, even if the first interrupt processing and the second interrupt processing conincide with each other the coincidence is not continued whereby transfer of data can be reliably carried out.
10 Citations
8 Claims
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1. In a data communication control system including a first control unit having microcomputer and a second control unit having a microcomputer, said second control unit including means for carrying out a first interrupt processing which starts in accordance with a first timing signal having a first period, and a second interrupt processing which starts in accordance with a second timing signal having a second period, said second control unit includes means responsive to said second interrupt processing to receive data transferred from said first control unit, wherein said first interrupt processing has priority over said second interrupt processing;
the improvement wherein said first control unit includes means for generating said second timing signal in a manner such that adjacent ones of said second timing signal have values of said second period different from each other, whereby at least one of said adjacent ones of the second timing signal can occur at a time which does not conflict with the first interrupt processing so as to enable the second control unit to carry out the second interrupt processing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
Specification