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Joined: Sat Oct 14, 2017 9:42 am

Csi2 switch

Sat Oct 14, 2017 9:53 am

I want to use two camera stream at the neaely same time. Like,take a picture from one camera and 0.1 sec later, take another picture from other camera. I know compute module has 2 csi interface. However,I already designed some physical parts to normal pi 3 and dont want to redesign them.
My question is can use a csi2 switch? Whenever i change the stream do i need to wait for the expose time(nearly 1 sec)?

I am planning to use this switch: Fsa641.


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Location: Montreal, Canada

Re: Csi2 switch

Tue Oct 17, 2017 6:34 pm

May I suggest that you just use the Raspberry Pi Compute Module.

It has two cameras and two displays brought out to the connector pins.

There is also a development board with all the connectors that you can just plug in to.

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Re: Csi2 switch

Thu Oct 19, 2017 8:51 pm

There are already a couple of products around using that CSI switch IC, eg http://www.ivmech.com/magaza/en/develop ... exer-p-109
Do remember that you have to consider the I2C bus to control the sensor too, and both sensors will be on the same I2C address.

The firmware will know nothing about your switching of the sensors, so if they are looking at different scenes then AGC and AWB will take a little while to settle.
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Re: Csi2 switch

Thu Oct 19, 2017 10:52 pm

OP switch is 0.35$ per unit, but only if you by 5000 ... and it has the problems 6by9 mentioned.
Compute model 3 does cost 35$ in Germany, with two Csi2 interfaces.
Pi camera multiplexer 6by9 pointed to does even cost 50$.
Two Pi Zero have two Csi2 interfaces as well, for 2*5$=10$ (or 20$ incl. shipping).
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