MIPI signal analysis method and device
An analysis method and technology of an analysis device, which are applied in the field of MIPI liquid crystal module and camera module testing, can solve the problems of inability to accurately analyze digital signals, inability to accurately measure MIPI high-speed signals by oscilloscopes, and high cost of oscilloscopes, so as to facilitate signal analysis. , Improve the test efficiency, the hardware realizes the effect of convenience
Active Publication Date: 2017-04-19
WUHAN JINGCE ELECTRONICS GRP CO LTD
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Problems solved by technology
In the past, only the oscilloscope was used to test whether the MIPI analog signal assignment and frequency were qualified. There was no method and device that supported MIPI-CSI and MIPI-DSI signal analysis, and the maximum transmission rate of each channel of MIPI high-speed signals could reach more than 1G, and the accuracy was low. High-precision oscilloscopes cannot accurately measure MIPI high-speed signals, and high-precision oscilloscopes are expensive and cannot accurately analyze digital signals.
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[0038] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0039] Such as figure 1 As shown, a kind of MIPI signal automatic test device provided by the present invention includes a camera 1, a MIPI signal source 2, a signal receiving module 3, a signal analysis module, an information processing module and an interface display module 6, wherein the signal analysis module includes a CSI signal An analysis module 4 and a DSI signal analysis module 7 , and the information processing module includes a CSI information processing module 5 and a DSI information processing module 8 .
[0040] Camera 1 is used to provide MIPI-CSI signals; MIPI signal source 2 is used to provide MIPI-DSI signals. The signal receiving module 3 is used for separating the received data according to the protocol standard. The CSI signal analysis module 4 is used to analyze the separated HS signal and extract the CSI info...
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The invention discloses an MIPI signal analysis method and device. The method comprises the steps that HS signals are separated from the received MIPI signals; the HS signals are analyzed, and an information packet is extracted from parallel data according to the MIPI protocol packing principle; a CRC check value A is extracted from the information packet, and frame rate, resolution, ECC and CRC calculation is performed on the information packet so that an actual CRC value B is obtained; and the CRC check value A and the actual CRC value B are compared, and transmission is correct if the two values are consistent, or check error information is generated. The device comprises a signal receiving module, a signal analysis module and an information processing module. The MIPI-CSI and MIPI-DSI signals can be analyzed so that error statistics of the error information in the signals can be realized and can be displayed for user reference through a visual interface, and the user is enabled to visually see the composition of the MIPI signals and the quality of the transmission link.
Description
technical field [0001] The invention relates to the field of MIPI liquid crystal module and camera module testing, in particular to a MIPI signal analysis method and device. Background technique [0002] The MIPI protocol defines a number of application interface standards, among which more mature interface applications include DSI (display interface) and CSI (camera) interfaces. The DSI interface is for liquid crystal module display applications, and the CSI interface is for camera applications. In the research and development, production, testing and pre-factory debugging of MIPI-based modules (LCD modules / camera modules), MIPI modules need to be tested, and MIPI-DSI signal sources need to be provided for LCD module testing , the liquid crystal module presents an image after receiving the DSI signal source, and judges the quality of the module through the image quality. Therefore, whether the MIPI-DSI signal source is correct or not plays a decisive role in the test result...
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IPC IPC(8): H04N17/00
CPCH04N17/002
Inventor 阳芬郑增强
Owner WUHAN JINGCE ELECTRONICS GRP CO LTD