Method and apparatus for acquiring device identification information
A technology of device identification and acquisition method, which is applied to measurement devices, instruments, measuring electricity and other directions, can solve the problem of limiting the number of device identification information that can be identified by GPIO ports, and achieve the effect of improving identification efficiency.
Active Publication Date: 2011-10-12
HUAWEI DEVICE CO LTD
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[0003] The embodiment of the present invention provides a method and device for obtaining device identification information, so as to avoid the restriction that the GPIO ports can identify the device identification due to the fact that the fixed number of GPIO ports in the prior art can only identify a limited number of device identification information A matter of quantity of information
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[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0021] figure 1 A schematic flowchart of a method for obtaining device identification information provided by an embodiment of the present invention, and figure 2 It is a schematic diagram of port connections in the method for obtaining device identification information provided by an embodiment of the present invention. Such as figure 2 As s...
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The invention embodiment relates to a method and an apparatus for acquiring device identification information. The method comprises: utilizing a first GPIO port for detecting a first discharging time of a capacitor discharging via a to-be-detected resistor; utilizing a second GPIO port for detecting a second discharging time of a capacitor discharging via a resistor with fixed value; and obtaining the resistance value of the to-be-detected resistor based on the first discharging time, the second discharging time and the resistance value of the resistor with fixed value. The invention embodiment can avoid the problem that with the prior art, a fixed number of GPIO ports can only recognize limited device identification information, thereby improving the identification efficiency of the GPIO port.
Description
Background technique [0001] Usually, the same type of hardware devices (such as LCD screens, cameras, chargers, etc.) can be produced by different manufacturers, or may have different functional characteristic parameters. There are some differences in use. Therefore, when setting an application program for each hardware device, it is necessary to set a corresponding application program for the hardware device according to the device identification information of the hardware device, such as manufacturer information, characteristic parameter information, and the like. [0002] In the prior art, a general purpose input output (General Purpose Input Output, GPIO for short) port may be used to identify an output level of a hardware device. Since the GPIO port only has two states of high level and low level, one GPIO port can only recognize two device identification information, that is, two GPIO ports can only recognize four device identification information. By analogy, the fix...
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Login to View More IPC IPC(8): G06F13/10
CPCG06F13/4081G01R31/3646G06F13/10G06F13/385
Inventor 姜建辉
Owner HUAWEI DEVICE CO LTD