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Automatic speed detection for asynchronous serial communications

An asynchronous, detector technology, applied in the field of data communication, to achieve the effect of reducing the waiting time

Inactive Publication Date: 2001-05-02
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the modem in the wireless device may be too busy to use the software loop or hardware timer approach to implement the autobaud function

Method used

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  • Automatic speed detection for asynchronous serial communications
  • Automatic speed detection for asynchronous serial communications
  • Automatic speed detection for asynchronous serial communications

Examples

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Embodiment Construction

[0031] The present invention will now be described more fully by reference to the accompanying drawings which show a preferred embodiment of the invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present invention. Inform those skilled in the art. Like numbers refer to like parts throughout the drawings.

[0032] As those skilled in the art will recognize, the invention can be implemented as a method, as a data processing system or a program product. Accordingly, the present invention can take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware. Furthermore, the invention can take the form of a computer program product on a computer readable storage medium having computer ...

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Abstract

The speed of asynchronous serial communications is detected by determining a duration of a data bit within an asynchronous data stream. The duration of the data bit is used to generate a clock frequency. The clock frequency is used to clock data from the asynchronous data stream into a register. The clocked data is processed according to an error indication.

Description

field of invention [0001] The present invention relates to data communication, and more particularly to asynchronous serial communication. Background of the invention [0002] Asynchronous serial data communication systems are known in which data terminal equipment (DTE) asynchronously transmits / receives serial data to / from data communication equipment (DCE) at varying baud rates. The baud rate indicates the rate at which data is communicated between the DTE and DCE (that is, bits per second or bps). For example, the DTE can send / receive data to / from the DCE at rates ranging between approximately 300 bps to 115,200 bps. However, before any communication starts, DTE and DCE are required to work at the same baud rate. The autobaud command can be used to equalize the baud rates used by DTE and DCE. [0003] Figure 1 shows a system utilizing asynchronous serial data communication according to the prior art. DTE100 is data terminal equipment such as ASCII terminal or personal...

Claims

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Application Information

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IPC IPC(8): G06F13/38H04L25/02
CPCH04L25/0262G06F13/385
Inventor J·S·佩蒂K·麦考利W·索尔斯D·奎恩
Owner TELEFON AB LM ERICSSON (PUBL)
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