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USB (universal serial bus) port reading and writing device and method of 1-wire bus

A read-write device, single-bus technology, applied in instruments, electrical digital data processing, etc., can solve the problems of inconvenient verification and testing of 1-Wire bus, no convenient reading and writing tools, etc., and achieve the effect of improving operability

Inactive Publication Date: 2012-03-21
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the current product design, because there is no convenient reading and writing tool, it is very inconvenient to verify and test the 1-Wire bus

Method used

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  • USB (universal serial bus) port reading and writing device and method of 1-wire bus
  • USB (universal serial bus) port reading and writing device and method of 1-wire bus
  • USB (universal serial bus) port reading and writing device and method of 1-wire bus

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Embodiment Construction

[0017] Such as figure 1 Shown is a block diagram of the hardware structure of a preferred embodiment of a single-wire (1-Wire) USB port read-write device (hereinafter referred to as "read-write device 1") of the present invention. The read-write device 1 is mainly composed of an IC chip and its peripheral circuits. The IC chip is a single-chip microcomputer 10 , and its peripheral circuits refer to a power supply 11 , a voltage regulator 12 , a connector 13 , an electrostatic protection circuit 14 and a USB connector 15 .

[0018] Such as image 3 As shown, besides the pins of the above-mentioned connecting power supply 11, voltage regulator 12, connector 13, electrostatic protection circuit 14 and USB connector 15, the single-chip microcomputer 10 also has a plurality of other pins, which are designed in this embodiment into a pin 16 having a DIO (data input / output) function (hereinafter referred to as "DIO pin 16"). The plurality of DIO pins 16 can be used to expand the f...

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Abstract

The invention relates to a USB (universal serial bus) port reading and writing device of a 1-wire bus, which comprises a USB module and a 1-wire bus host, wherein the USB module comprises a single chip microcomputer with a USB cache, and a USB connector connected with the single chip microcomputer, and the USB connector is connected with a host computer; the host computer sends commands to the USB module, and the commands are converted into 1-wire bus commands by the USB module; and the 1-wire bus host comprises DIO (data input output) pins and a connector which is connected with the single chip microcomputer, and is used for simulating the 1-wire bus through the DIO pins, sending commands to a 1-wire bus slave device in different time sequences according to the 1-wire bus commands, reading the data returned by the 1-wire bus slave device according to the commands, temporarily storing the read data in the USB cache, and returning the data to the host computer through a USB. The invention also provides a USB port reading and writing method of the 1-wire bus. The invention is utilized to realize the reading and writing operation of the 1-wire bus device.

Description

technical field [0001] The invention relates to a single-bus USB port reading and writing device and method. Background technique [0002] Currently commonly used serial buses for data transmission include I2C bus, SPI bus and SCI bus. The I2C bus communicates in a synchronous serial 2-wire mode (a clock line, a data line), the SPI bus communicates in a synchronous serial 3-wire mode (a clock line, a data input line, and a data output line), and the SCI bus Communication is done asynchronously (one line for data in, one line for data out). The single bus (1-Wire Bus) adopts a special interface protocol, solves control, communication and power supply through a single connection line, reduces system cost and simplifies design. Among them, the single signal line adopted by the 1-Wire bus transmits both clock and data, and the data transmission is bidirectional. It has many advantages such as saving I / O port line resources, simple structure, low cost, and convenient for bus e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F13/38
CPCG06F13/38G06F13/387G06F2213/0042
Inventor 李圣义
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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