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Anti-conflict method of bus transfer data

A bus transmission and anti-collision technology, applied in transmission systems, digital transmission systems, data exchange networks, etc.

Active Publication Date: 2008-07-23
北京豪沃尔科技发展股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the defects existing in the prior art, the present invention provides a data transmission anti-collision method, which can effectively solve the defects generated when multiple transmitters send data to the bus and the bus device receives data at the same time, and no output short circuit will occur

Method used

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] Fig. 1 is a flow chart of the bus transmission data anti-collision method of the present invention. On the bus, the bus device monitors the bus and then judges the status of the bus. When the bus is transmitting data with high priority, the data with low priority on the bus will give way to the data with high priority, and the wait bit will be triggered at the same time. The counter counts events and continues to monitor the bus. The waiting bit is the counting bit of the data sent by the bus device. Counting from the last low level of the data on the bus, the data is sent after N data bits are idle, and the waiting bit of each bus device The bit counter counts and is cleared by 0 logic on the same bus to ensure synchronous counting. The count value of 1 waiting bit is a period of a logic bit. The bus device has priority when transmitting low-level data, and the...

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Abstract

The invention relates to an anti-collision method of bus transfer data, which comprises first, monitoring a bus with bus equipment, judging bus state, when the bus is transferring data with high priority grade, abdicating data with low priority grade on the bus to data with high priority grade, meanwhile, triggering a wait bit counter to counter, and continuously monitoring the bus, sending data when the bus has no data with high transmission priority grade, and judging the priority grade of the data which are sent, the data with low priority grade recedes in middle way, abdicating to the data with high priority grade, and meanwhile trigging the wait bit counter to count, and continuously monitoring the bus, and continuously sending the data with high priority grade. The judgment of the state of the bus leads sending data of a sending end not to conflict, and the judgment of the priority grade of data which are sent leads receiving data of a receiving end not to conflict, and the mechanism can not destroy data of high priority grade.

Description

technical field [0001] The invention relates to an anti-collision method for transmitting data, in particular to an anti-collision method for transmitting data generated and transmitted based on a specific bus transceiver. Background technique [0002] Aiming at the technical problem that the current industrial fieldbus cannot take into account the transmission distance, transmission rate, resource utilization and cost at the same time, the applicant provides a bus data transceiver to receive and send digital signals, see the application number: 200710178354.5, A patent application for an invention entitled Bus Data Transceiver. At the same time, in order to realize continuous low-level signals when the above-mentioned transceiver generates digital signals, the applicant provides a method for forming digital data based on the specific bus transceiver. The invention patent application of the formation method, but when multiple transmitters send data to the bus and the bus de...

Claims

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Application Information

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IPC IPC(8): H04L12/413
Inventor 王立新
Owner 北京豪沃尔科技发展股份有限公司
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