HDMI Source test device and method based on FPGA
A technology of testing equipment and testing modules, which is applied in the direction of high-definition television systems, televisions, electrical components, etc., can solve the problems of prolonging test time and low efficiency, and achieve the effect of simple software setting, simple hardware design, and saving test time
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Embodiment 1
[0037] For the embodiment of FPGA-based HDMI Source test equipment of the present invention, please refer to figure 1 As shown, it includes an FPGA but does not include an HDMI conversion chip, and the FPGA is connected to the HDMI Source through corresponding pins;
[0038] The FPGA directly receives the signal from the HDMI Source, analyzes the video signal and audio signal according to the HDMI protocol, and judges whether the HDMI signal is correct according to the predefined timing parameters and data, and obtains the test result.
[0039] Another example figure 2As shown, the FPGA further includes a CEC test module, a serial-to-parallel module, a TMDS decoder module, a phase alignment module, an audio-video separation module, a video test module and an audio test module; it also includes an EDID module and an HPD module. Wherein, the CEC test module is correspondingly connected to the HDMI Source through the pin hdmi_cec; the serial-to-parallel module, the TMDS decoder...
Embodiment 2
[0051] combine figure 1 As shown, this embodiment is an embodiment of the FPGA-based HDMI Source testing method of the present invention, which does not use an HDMI conversion chip, but connects the FPGA to the HDMI Source through corresponding pins; through the FPGA, it directly receives the signal from the HDMI Source. Signal, analyze the signal according to the HDMI protocol, and judge whether the HDMI signal is correct according to the predefined timing parameters and data.
[0052] which, combined with figure 2 Shown, the testing process of described FPGA is:
[0053] When the HDMI test inside the FPGA is enabled, an HPD module will pull up the level of the hdmi_hpd signal to prompt the HDMI Source to recognize that an external device is connected.
[0054] Then in the first aspect, a series of predefined data is received by a CEC test module to judge whether the hdmi_cec signal of the HDMISource is correct;
[0055] In the second aspect, the clock of the HDMI source ...
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