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Method and device for automatically identifying MAC (Media Access Control) pin and ground pin of audio interface

An audio interface and automatic identification technology, which is applied in the electronic field, can solve the problems of the audio signal sending device and the audio signal receiving device being unable to communicate normally, and achieve the effect of low cost and convenient subsequent use.

Active Publication Date: 2012-11-14
TENDYRON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the above-mentioned different types of audio interfaces, when the audio interface of the audio signal sending device is not connected to the ground pin of the audio interface of the audio signal receiving device, the audio signal sending device and the audio signal receiving device cannot communicate normally

Method used

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  • Method and device for automatically identifying MAC (Media Access Control) pin and ground pin of audio interface
  • Method and device for automatically identifying MAC (Media Access Control) pin and ground pin of audio interface
  • Method and device for automatically identifying MAC (Media Access Control) pin and ground pin of audio interface

Examples

Experimental program
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Embodiment 1

[0043] figure 1 A flow chart showing a method for automatically identifying microphone pins and ground pins of an audio interface, see figure 1 , the method includes the following steps:

[0044] Step S101, judging that the absolute value of the voltage difference between the first pin and the second pin is less than or equal to the first threshold, then the identification operation of the first pin and the second pin of the audio interface is not performed;

[0045] Step S102, judging that the absolute value of the voltage difference between the first pin and the second pin is greater than or equal to the second threshold, then judging the type of the first pin and the second pin of the audio interface according to the positive or negative of the voltage difference;

[0046] Wherein, the second threshold is greater than or equal to the first threshold; specifically, the value range of the first threshold is generally 0-1V; preferably, the value range of the first threshold i...

Embodiment 2

[0060] figure 2 A schematic diagram showing embodiment 2 of the device for automatically identifying microphone pins and ground pins of an audio interface, see figure 2 , the device for automatically identifying the microphone pin and the ground pin of the audio interface, including a judging module, the judging module is used for judging that the absolute value of the voltage difference between the first pin and the second pin is less than or equal to the first threshold , do not perform the identification operation on the first pin and the second pin of the audio interface; when it is judged that the absolute value of the voltage difference between the first pin and the second pin is greater than or equal to the second threshold, pass the positive value of the voltage difference Negatively determine the types of the first pin and the second pin of the audio interface; wherein, the second threshold is greater than or equal to the first threshold; when it is judged that the ...

Embodiment 3

[0065] image 3 A schematic diagram showing embodiment 3 of the device for automatically identifying microphone pins and ground pins of an audio interface, see image 3 , on the basis of Embodiment 2, this embodiment adds a collection module, which is connected to the first pin and the second pin of the audio interface respectively, and is used to collect the data of the first pin and the second pin respectively. the voltage value or the voltage difference, and send the voltage value or the voltage difference to the judging module.

[0066] Further, see Figure 4 , the collection module may include a first collection module and a second collection module, wherein one end of the first collection module is connected to the first pin of the audio interface for collecting the voltage value of the first pin; One end is connected to the second pin of the audio interface for collecting the voltage value of the second pin; the other ends of the first acquisition module and the secon...

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Abstract

The invention provides a method and a device for automatically identifying an MAC (Media Access Control) pin and a ground pin of an audio interface and an electronic signing tool. The method comprises the following steps of: if judging that the absolute value of the voltage difference value of a first pin and a second pin is smaller than a first threshold value, not carrying out the identification operation on the first and second pins of the audio interface, or judging the types of the first and second pins of the audio interface through the plus-minus of the voltage difference value, wherein a second threshold value is larger than or equal to the first threshold value; when judging the absolute value of the voltage difference value is larger than or equal to the second threshold value and the voltage difference value is a positive value, judging the first pin is the MAC pin and the second pin is the ground pin; when judging the absolute value of the voltage difference value is larger than or equal to the second threshold value and the voltage difference value is a negative value, judging the first pin is the ground pin and the second pin is the MAC pin. According to the invention, the type of the audio interface can be judged only according to the values of the output voltages of the first and second pins so that the type of the audio interface can be automatically and accurately detected at a lower cost for facilitating later use.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a method, device and electronic signature tool for automatically identifying microphone pins and ground pins of an audio interface. Background technique [0002] The audio interface (such as a headphone jack) of an existing audio signal sending device (such as a mobile communication terminal) and the audio signal receiving device (such as an electronic signature tool, an audio signal conversion device, and other audio output pins receive and The audio interface of an audio signal receiving device that processes audio signals generally adopts a four-segment interface, wherein the third pin and the fourth pin are audio output pins, that is, the left channel pin and the right channel pin. However, the functions of the first pin and the second pin of different audio interfaces are different. There is a case where the first pin is a microphone pin MIC, the second pin is a ground p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R3/00
CPCH04R2420/09H04R3/00H04R29/004H04R1/1041H04R2420/05H04R3/002
Inventor 李东声
Owner TENDYRON CORP
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