SK-AM62: which CSI camera we can use for AM62 SK EVM?

Hello Rio,

Rio Chan said:

 A. Camera demo user guide?

Please refer to the AM62x Linux Academy, specifically the following chapters:

• Evaluating camera
• Using camera

Rio Chan said:

B. Which Camera module we can use? Where to order it?

Since the AM62x doesn't have ISP, we recommend to use sensors with built-in ISP. The AM62x Linux SDK has the driver for the OV5640 sensor. In addition, the AM62x SK-EVM has a Raspberry PI connector. So only camera modules with a Raspberry PI connector can work on the AM62x SK-EVM. The following camera modules have been tested with the AM62x SK-EVM:

• https://www.technexion.com/products/embedded-vision/camera-sensors/evk/tevi-ov5640c-s84-ir-rpi
• https://www.digikey.com/short/w3h4dq37

However, we've seen some connection issues on the AM62x SK-EVM with these modules. The sensor was not probed consistently on multiple EVMs. We're currently debugging this issue. 

Rio Chan said:

C. is the CSI camera demo SW ready?

Not sure what you meant by demo SW. The CSI-2 RX driver is available in the Linux SDK.

Regards,

Jianzhong

Hi J:

THanks for the detail.

When will this camera SW issue be resolved?

Do you have the working patch for SDK8.2?

Or we need to wait until SDK8.4?

BR Rio

Hello Rio,

The issue is not SW related, but a HW one with the EVM. We currently haven't decided when the fix will be made available.

Regards,

Jianzhong

So, there is no way to promote the AM62 with camera?

How to DIN more AM62 with AI/Cameras within what we have note?

If this is the HW issue, any HW modification to workaround it?

BR Rio

Rio,

Let me check internally on when we can provide a fix/workaround.

Thanks,

Jianzhong

Hello Rio,

Another camera module of OV5640 was tested internally by another team: ALINX AN5641. It worked fine with AM62x SK-EVM. I will get one and test it with multiple boards. If it works fine consistently, then you can use this one to promote AM62. I'll let you know as soon as I finish my testing.

Regards,

Jianzhong

Hello Rio,

I ordered one ALINX AN5641 but the shipping was delayed. So far, we have tested 3 different camera modules which are all based on OV5640 sensor. Here is a summary of the testing on AM62x SK-EVM:

1. ALINX AN5641: two were tested and both worked fine
2. TEVI-OV5640C: one was tested and it worked fine
3. Digilent PCAM 5C: three were tested and only one worked fine reliably

So at this moment, I would recommend you to use either ALINX AN5641 or TEVI-OV5640C. I will update you once we test more camera modules.

Regards,

Jianzhong

Hi J:

Okay, thanks for your effort.

May we learn from you about how to user these 2 cameras: ALINX AN5641 or TEVI-OV5640C.?

BR Rio

Hi Rio,

Since both of these two camera modules are based on the OV5640 sensor, our Processor SDK Linux has the support out-of-box. Please refer to the AM62x Linux Academy, specifically the following chapters:

• Evaluating camera
• Using camera

Hi J:

We are going to order those 2 cameras.

Plz confirm if we need to purchase the "connect cable / converter" for them as well?

We will close this E2E until we confirm those 2 cameras are tested okay.

BR Rio

Hi J:

Any feedback?

-->Plz confirm if we need to purchase the "connect cable / converter" for them as well?

BR Rio

Hi Rio,

The AM62x SK-EVM has a 15-pin FFC connector. Both the ALINX AN5641 and TEVI-OV5640C modules come with a 15-pin FFC cable.

Also, I've received the ALINX AN5641 I ordered last week. It works fine with the AM62x SK-EVM. 

Regards,

Jianzhong

Hi J:

THanks , Appreciated your feedback.

I will close this until testing completed.

BR Rio 

Hi Rio,

No problem. Yes, please update us on the testing.

Thanks,

Jianzhong

Hi Rio,

If you're evaluating the TEVI-OV5640C module, please keep in mind that the default clock frequency is 24MHz according to the camera spec. You'll need to modify the device tree overlay and set clock-frequency to <24000000>:

https://git.ti.com/cgit/ti-linux-kernel/ti-linux-kernel/tree/arch/arm64/boot/dts/ti/k3-am625-sk-csi2-ov5640.dts?h=ti-linux-5.10.y#n19

For ALINX AN5641, you can use the existing ov5640 DTS overlay as is.

Regards,

Jianzhong

Hi Jianzhong:

Due to busy, I just have time continuing to work this.

May you take a photo of the CSI Cable connect?

I have the CSI cable coming alone with OV camera, but I don't know the cable connection direction.

The cable has Blue/Grey on both end, to connect it to the EVM, I'm not sure which direction is correct.

BR Rio

Hello Rio,

If you look inside of the CSI connector on the board, you should be able to see the pins on one side. So make sure the grey side (which has the pin's contact) on the ribbon cable contacts the pins inside the CSI connector, or the blue side contacts the clip side of the CSI connector.

Regards,

Jianzhong

Hi Jianzhong:

THanks, plz wait my testing.

If it works, I will close this.

BR Rio

Sounds good, Rio.

Thanks,

Jianzhong