Some questions about Synchronize of two image sensors

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Anonymous
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Hi,ALL

   

    I am debugging the two eyes image sensors connecting to FX3 as the picture shows:http://a3.qpic.cn/psb?/V10Mr0Vp1DXVaf/00T2ln32Z2bIFQopdG2t7Zlrz71yAMUw502zH6yFkdA!/m/dGYBAAAAAAAAnul...

   

two eyes image sensors hardware environment:
Platform: FX3_CYUSB3014
Sensor model: MT9M034, parallel port output 12bit
Resolution: 1280 * 720-60fps, black and white 8bit
Interface: take each sensor high 8bit * 2 = 16bit (as a similar YUV format)
MCLK: external 48MHz crystal at the same time to provide two sensors, PIXCLK configured to 74.25MHZ

   

Left and right sensor output signal is not synchronized,all the two sensors' PCLK / FV / LV were tested with the oscilloscope.These signals are different degrees of dislocation (because if they are synchronizated, theoretically two sensors of these signals should overlap), the pictures as follows:

   

The FV waveform of two sensors:http://a3.qpic.cn/psb?/V10Mr0Vp1DXVaf/0bl2jfnZiFTDFz0MBRUcnAjAV*gpNGPQPivJy7va*mk!/m/dG4BAAAAAAAAnul...

   

The LV waveform of two sensors:http://a3.qpic.cn/psb?/V10Mr0Vp1DXVaf/Ox6SSaUf8w8e4ff0t5CBPF21qLCPuH.9ZdVt28Uu4zo!/m/dBYAAAAAAAAAnul...

   

The PIXCLK waveform of two sensors:http://a2.qpic.cn/psb?/V10Mr0Vp1DXVaf/2KwYDHpDQuaL9XndSU*XiRnmJf0hnxKBCLkzFKUbGxo!/m/dCUAAAAAAAAAnul...

   

In addition,the high 8bit sensor image there are black stripes (fixed appears above and random appears in the horizontal direction, as shown in the picture).I think that datas are lossed.

   

pictures:http://a3.qpic.cn/psb?/V10Mr0Vp1DXVaf/SHInQgoVvOwvQy.aZWMzP7Tqx8BXG3wRlNTtPIU70cY!/m/dG4BAAAAAAAAnul...

   

Now, i don't know what i should do next. Could you give me some guidance or suggestions ?

   

Thank you!

   

I use an an external trigger input that can be used to synchronize two video streams.But the pictures show that they are not synchronized.I don't konw why? 

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Anonymous
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I am not able to see the images which you are shared. I request you to uoload the images as attachment in this next post.

   

We have shown in section 9 of AN75779 "Connecting Two Image Sensors". Please note that in figure 50, there are 2 sets of FV/LV shown, but both needs to be synchronized as the FX3 GPIF can sample all the 16 bit a time (it cannot sample the fist 8 bit at FV1/LV1, and next D8:15 at FV2/LV2). Please refer to this section of application note which  explains the feasibility and the necessary firmware modification for the same. Let us know if you any further question.

   

http://www.cypress.com/documentation/application-notes/an75779-how-implement-image-sensor-interface-...

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Anonymous
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now,i use the trigger to control the synchronization of two sensors.The pictures of sensor,waveform of LV and LV as follows,

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