Camera capture at same time through IC and directly to memory

[erezsteinberg]

Dear experts,

I am wondering if the following is possible.

iMX6 is connected to a single CMOS sensor, e.g. 1080p.

Is it possible to have both paths working at the same time:

CSI -> MEM

CSI -> IC -> MEM

So, for every frame, I can get the original image from the sensor (CSI->MEM)  + a downscaled image (CSI->IC->MEM) ?

Can iMX6 support such a configuration in theory?

Sincerely,

Erez

[Yuri]

Hello,

  Basically it is possible (to have the both paths working at the same time).

According to section 37.4.3.1 (CSI Block Diagram) of the i.MX6 DQ Reference Manual :

“The CSI gets data from the sensor […] and transfer it according to configuration of DATA_DEST

register to one or more of the following: IC, SMFC.” Bit field DATA_DEST allows setting both
destination IC and SMFC simultaneously. Please take a look at section 37.5.151 [CSI0 Sensor
Configuration Register (IPUx_CSI0_SENS_CONF)] 

Nevertheless, I am afraid, practically it is not simple job to implement this approach, since

in any case finally AXI bus (via IDMAC) is destination for all data. You may look at Figure 37-1

(IPU Block Diagram) and Figure 37-2 (IPU Detailed Block Diagram).

Have a great day,
Yuri

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