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Master device and slave device communication circuit

A technology for equipment communication and master equipment, applied in the direction of electrical digital data processing, instruments, etc., can solve problems such as wasting time, addressing errors, etc., and achieve the effect of ensuring signal transmission

Inactive Publication Date: 2011-08-10
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if there are hundreds or thousands of slave devices in the bus control system, using hardware to address each slave device is not only a waste of time, but also may cause addressing errors

Method used

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  • Master device and slave device communication circuit
  • Master device and slave device communication circuit
  • Master device and slave device communication circuit

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0012] Please refer to figure 1 A preferred embodiment of the master-slave communication circuit of the present invention includes a master device 10 (such as a central processing unit), several slave devices 20 and a bus 30 for transmitting data between the master device 10 and the slave device 20, such as I2C bus, RS-485 bus, RS-422 bus.

[0013] The host device 10 includes a microcontroller 12 , a power supply module 14 and an address setting module 16 . Each slave device 20 includes a microcontroller 22 and a power module 24 . The microcontroller 12 of the master device 10 is connected to the microcontroller 22 of each slave device 20 through the bus 30 to realize communication between the master device 10 and the slave devices 20 .

[0014] The power supply module 14 of the master device 10 is connected to the power supply module 24 of each slave device 20 through the address setting module 16, and the address setting module 16 detects the total current output by the po...

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PUM

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Abstract

A master device and slave device communication circuit comprises a master device, a slave device and a bus, wherein the master device comprises a microcontroller, a power source module and an address setting module; the slave device comprises a microcontroller and a power source module; the power source module of the master device is connected with the power source module of the slave device by the address setting module; the address setting module is used for detecting total currents output by the master device and outputs an ID address setting signal in proportionality constant to the totalcurrents to a new accessed slave device and the master device according to the total currents; the new accessed slave device correspondingly sets an ID address according to the ID address setting signal; and the master device records the ID address that is the ID address of the new accessed slave device according to the ID address setting signal. The master device and slave device communication circuit can automatically set the ID address of the slave device.

Description

technical field [0001] The invention relates to a master-slave device communication circuit. Background technique [0002] The bus control system generally includes a master device, the master device, and multiple controlled devices, the slave devices. The information of the master device can be sent to each slave device or a designated slave device, and the information sent by the slave device can only be received by the master device. Receive, each slave device cannot communicate directly. In order to realize the communication between the master device and multiple slave devices, an identification address must be set for each slave device, that is, an ID address. Therefore, in the control system, each slave device has a unique ID address. In the control system, if multiple slave devices have the same ID address, there will be communication conflicts. [0003] The addressing method of a general bus control system is to use hardware such as two rotary address switches for ...

Claims

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Application Information

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IPC IPC(8): G06F13/40
Inventor 谢明志
Owner STATE GRID CORP OF CHINA
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