Method and apparatus for malfunction detection of general-purpose input/output interface
A general-purpose input and output, fault detection technology, applied in the direction of measuring devices, measuring electricity, measuring electrical variables, etc., can solve the problems of high cost, inability to adapt to large-scale production, and inability to realize automatic detection, etc., and achieve high reliability.
Active Publication Date: 2010-10-13
LEADCORE TECH
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0012] Although the detection through the indicator light is more intuitive, it must rely on human eyes to participate in the observation and judgment, and automatic detection cannot be realized. The detection speed is very slow and the reliability is poor. When the number of GPIOs is large, the efficiency is very low and cannot meet the needs of mass production.
[0013] The method of detection through external processor scanning requires the assistance of an external processor, the detection circuit is complex, the cost is high, and the scalability is poor. The console needs to communicate and coordinate with the internal processor and the external processor at the same time, and the software complexity is high.
[0014] The method of detecting through local GPIO loopback can only detect open circuit, but cannot detect short circuit fault
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
no. 1 Embodiment
[0065] The first specific embodiment of the fault detection method of the general input and output interface of the present invention comprises:
[0066] The first grouping step is to obtain all GPIO pairs with adjacent pads or vias on the PCB board from the GPIO to be tested;
[0067] The first short-circuit detection step judges that all GPIOs obtained in the grouping step do not constitute a coordinated state of a loopback connection, and when the coordinated state of the GPIO pair is a coordinated change, it is judged that there is a short circuit between the GPIOs that form the GPIO pair;
[0068] The reason for the judgment is as follows: Since all the GPIOs that make up the GPIO pair do not form a loopback link at this time, the GPIO pair should not change in coordination. At this time, if it is detected that the coordination state of the GPIO pair is a coordinated change, it means There is an improper loopback link between the GPIOs, that is, there is a short circuit f...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a fault detection method for input and output interfaces and a device thereof, wherein the method obtains the coordination state of all general input and output interface couple GPIO having no loop connection and having adjacent pads or through holes on a PCB board, to judge the short circuit condition between the CPIO of the GPIO couple when the coordination state of the GPIO couple is coordination change. The method and device have high automation degree and simple process, can quickly and accurately check the short circuit and open circuit faults of the GPIO interfaces.
Description
technical field [0001] The invention relates to circuit detection technology, in particular to a fault detection method and device for a general input and output interface, which realizes fast and batch fault detection of the general input and output interface. Background technique [0002] The application interfaces provided by current electronic products to customers are becoming more and more complex and rich. In addition to dedicated interfaces such as traditional audio and JTAG, manufacturers generally provide a large number of GPIO (General Purpose Input Output, general purpose input and output) interfaces to customers for custom use, to facilitate customer use or secondary develop. These GPIO interfaces must undergo a complete test before leaving the factory to ensure the reliability of the interface performance. [0003] At the same time, as products become smaller, the possibility of short circuits and open circuits during production increases. When the product e...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/317G01R31/28G01R31/02G01R31/00
Inventor 胡乐新莫永辉
Owner LEADCORE TECH