Image Problem on CX3

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TaKI_297676
Level 2
Level 2
25 sign-ins 10 replies posted 10 sign-ins

Hello

 

I am testing CX3 with a certain sensor (100fps).

 

MIPI Setting is below

TaKI_297676_0-1611290071892.png

we have three problem.

1. Broken image

TaKI_297676_7-1611290189445.png

Image is broken line by line. 

2.  CB Failure

==================

AplnStrt:SMState = 0x1
TimeDiff = 10105 ms FPS = 98
TimeDiff = 10005 ms FPS = 99
TimeDiff = 9996 ms FPS = 100
TimeDiff = 9996 ms FPS = 100
TimeDiff = 9996 ms FPS = 100
TimeDiff = 10006 ms FPS = 99
TimeDiff = 9996 ms FPS = 100
TimeDiff = 9996 ms FPS = 100
CB failure
AplnStop:SMState = 0x5
AppStart

AplnStrt:SMState = 0x1
TimeDiff = 10046 ms FPS = 99
CB failure
AplnStop:SMState = 0x5
AppStart

AplnStrt:SMState = 0x1
TimeDiff = 10045 ms FPS = 99
TimeDiff = 9995 ms FPS = 100
TimeDiff = 10005 ms FPS = 99
CB failure
AplnStop:SMState = 0x5
AppStart

AplnStrt:SMState = 0x1
TimeDiff = 10045 ms FPS = 99
TimeDiff = 9995 ms FPS = 100

================================

Sometimes "CB failure" was happened. 

Can you advice me about the solution for fixing this problem?

 

 

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1 Solution
Hemanth
Moderator
Moderator
Moderator
First like given First question asked 750 replies posted

Hi,

With the current configuration vertical blanking is only 200us. It should be greater or around 400us.

Can you make following changes and test:

CSI clock: 400MHz(Make sure that transmitter is also configured for this value);

Hblanking: 160pixel; VBlanking: 50line

With this vertical blanking will be increased to 400us.

Regards,

Hemanth

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3 Replies
Hemanth
Moderator
Moderator
Moderator
First like given First question asked 750 replies posted

Hi,

With the current configuration vertical blanking is only 200us. It should be greater or around 400us.

Can you make following changes and test:

CSI clock: 400MHz(Make sure that transmitter is also configured for this value);

Hblanking: 160pixel; VBlanking: 50line

With this vertical blanking will be increased to 400us.

Regards,

Hemanth
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Thank you for your reply.

You mentioned CSI clock 400MHz.

But is CX3 spec 300MHz for 4ch MIPI?

On your datasheet, MIPI Max speed is 2.4Gbps.

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Hemanth
Moderator
Moderator
Moderator
First like given First question asked 750 replies posted

Hi,


But is CX3 spec 300MHz for 4ch MIPI?

On your datasheet, MIPI Max speed is 2.4Gbps.


Throughput calculation is according to Q/A No. 6 in this KBA . This takes blanking also into consideration. So, with the modification I suggested throughput will not exceed 2.4Gbps.

Please try the same.

Regards,

Hemanth
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