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

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...

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

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