A Method of Adaptive Addressing for Devices with Bus Topology
A topology and self-adaptive technology, applied in bus networks, digital transmission systems, data exchange networks, etc., can solve problems such as high inaccuracy, cumbersome operations, and long time-consuming, so as to improve work efficiency, reduce cumbersome links, and improve The effect of accuracy
Active Publication Date: 2019-09-03
河南西岛仪表研发有限公司
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Problems solved by technology
[0003] The original technical solution manually records the master-slave device relationship on the bus, that is, the relevant address information, and manually enters it into the server or the master device storage area, which takes a long time, requires a lot of manpower, has high inaccuracy, and is cumbersome to operate. After the slave device is newly connected or offline, the system cannot adaptively update the stored slave device information, causing frequent system failures
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[0041] Attached below figure 1 And attached figure 2 , to further describe the present invention.
[0042] In the bus topology, since the master and slave devices share the data communication line, the initiation of the command is dominated by the master device, and the slave device passively receives the command information of the master device, and only one slave device can reply at the same time. Otherwise, the information will generate garbled characters, resulting in data disorder and cannot be parsed. Both the master and slave devices are embedded devices based on the microcontroller MCU, and have a certain non-volatile storage space for storing device status information, device address information and other related information.
[0043] as attached figure 1 As shown, a method for adaptive addressing of devices with a bus topology in the present invention includes that the master device selects three types of instructions to manipulate the slave device, and the three...
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The present invention relates to the software field of a bus system, and in particular to a method for adaptive addressing of devices with a bus topology. The method includes a master device selecting three commands to control a slave device. The three commands are device logout, device Pre-registration and device registration; after the broadcast sends the device logout command, the slave devices that receive the command on the bus need to reset the device status; after the broadcast sends the device pre-registration command, the slave devices on the bus receive the command and will proceed according to the relevant process Operation; After broadcasting and sending the device registration command, wait to receive the device registration information sent from the device. The present invention proposes a solution to the problem of self-adaptive acquisition of master-slave device data based on a bus-type topology structure. Only three instructions are needed to complete the acquisition and update of device information on the entire bus, which is convenient and efficient, and reduces the cumbersome links of manual record registration , also improves the accuracy rate, thereby improving the work efficiency of the entire data acquisition bus.
Description
technical field [0001] The invention relates to the software field of a bus system, in particular to a device adaptive addressing method of a bus topology. Background technique [0002] At present, the bus type is one of the most popular network topologies. The connection form is simple, easy to install and deploy, and the cost is low. It is more flexible to add and delete terminal devices, without affecting the normal operation of the network, and the system has good expansion performance. There is one master device and one or more slave devices in the bus topology. There is only one bidirectional communication line between the master device and the slave device. Only one device is allowed to send data information at the same time on the communication link, otherwise it will cause message confusion. , data communication relies on addresses for one-to-one or broadcast transmission. [0003] The original technical solution manually records the master-slave device relationshi...
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IPC IPC(8): H04L12/24H04L12/40H04L29/12
CPCH04L12/40006H04L41/0813H04L41/12H04L61/50
Inventor 杨支丹刘卓
Owner 河南西岛仪表研发有限公司