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A serial bus system

A technology of serial bus and SPI bus, which is applied in the field of internal bus control, can solve problems such as the inability to meet the control requirements of equipment test nodes and controlled devices, and achieve the effects of simplifying design complexity, high system reliability, and reducing design costs

Inactive Publication Date: 2016-01-20
CHINA ELECTRONIS TECH INSTR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional SPI bus is a point-to-point data transmission line, which cannot meet the control requirements of numerous test nodes and controlled devices.

Method used

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  • A serial bus system
  • A serial bus system
  • A serial bus system

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Embodiment Construction

[0026] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0027] combine figure 1 As shown, a serial bus system includes a master controller, a serial bus and several control nodes; the serial bus is composed of the SCK serial clock line of the standard SPI bus, the MOSI data line, the MISO data line and three control lines , the three control lines are respectively defined as LDATA control line, LADDR control line, and LCTRL control line; among them, the SCK serial clock line, MOSI data line, and MISO data line are standard SPI buses, which can complete the standard SPI bus transmission protocol.

[0028] The six cables protruding from each control node are respectively connected to the six cables on the serial bus; each control node is equipped with multiple devices; the main controller uses LDATA control lines, LADDR control lines and LCTRL control lines Send the corresponding control word CTRL_WOR...

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Abstract

The invention discloses a serial bus system suitable for internal bus control of measuring equipment. The serial bus system comprises a master controller, a serial bus and a plurality of control nodes. The serial bus comprises a an SLCK serial clock line of a standard SPI bus, an MOSI data line, an MISO data line and three control lines. Six lines extend out of each control node to be corresponding connected to the six lines of the serial bus. A plurality of devices are disposed on each control node. The master controller transmits corresponding CTRL_WORD to a node controller through the three control lines so as to select contents transmitted on the standard SPI bus or set a node register of each control node. The serial bus system has the advantages that required serial bus number is low, design complexity of a PCB (printed circuit board) is reduced, system reliability is high, and design cost is lowered evidently.

Description

technical field [0001] The invention relates to a serial bus system, which is suitable for internal bus control of measuring equipment. Background technique [0002] Measurement equipment is a device that is composed of multiple test nodes and can automatically complete excitation, measurement, data processing and display or output test results. The test node is the smallest functional unit of the measurement equipment. In order to complete the measurement function of the test node, each test node is composed of several devices. The measurement equipment needs to control the above-mentioned test nodes and their devices, so that they can transform the tested signal according to the corresponding timing to complete the final digital processing. [0003] At present, the parallel control mode is commonly used inside the measurement equipment, and the various test nodes inside the measurement equipment are connected together through multiple cables such as data bus, address bus ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F13/40
Inventor 陈安军詹永卫战云王峰
Owner CHINA ELECTRONIS TECH INSTR CO LTD