topic What is the purpose of DEMO_CAMERA_BUFFER_COUNT in demo csi_mipi_yuv.c? in i.MX RT Crossover MCUs

What is the purpose of DEMO_CAMERA_BUFFER_COUNT in demo csi_mipi_yuv.c?

Mc2023 — Wed, 05 Jul 2023 16:52:39 GMT

Hello All,

What is the purpose of DEMO_CAMERA_BUFFER_COUNT in demo csi_mipi_yuv.c?

Remark: I am using i.MX RT1160 Evaluation Kit.

Best regards,

Re: What is the purpose of DEMO_CAMERA_BUFFER_COUNT in demo csi_mipi_yuv.c?

Miguel04 — Thu, 06 Jul 2023 18:02:20 GMT

Hi @Mc2023

It is the size of the empty frame buffer to transmit to the buffer queue of the camera.

Best Regards, Miguel.

Re: What is the purpose of DEMO_CAMERA_BUFFER_COUNT in demo csi_mipi_yuv.c?

Mc2023 — Thu, 06 Jul 2023 18:08:48 GMT

Hi @Miguel04,

Thanks for your reply!

Could you tell me why the value was set to 4?

Best regards,

Mustafa

Re: What is the purpose of DEMO_CAMERA_BUFFER_COUNT in demo csi_mipi_yuv.c?

Miguel04 — Thu, 06 Jul 2023 18:13:00 GMT

Hi @Mc2023

Could you tell me which example are you using? I have DEMO_CAMERA_BUFFER_COUNT set to a value of 3.

Best Regards, Miguel.

Re: What is the purpose of DEMO_CAMERA_BUFFER_COUNT in demo csi_mipi_yuv.c?

Mc2023 — Thu, 06 Jul 2023 18:14:53 GMT

Hi @Miguel04,

I am using the demo: evkmimxrt1160_csi_mipi_yuv_cm7

Best regards,

Re: What is the purpose of DEMO_CAMERA_BUFFER_COUNT in demo csi_mipi_yuv.c?

Mc2023 — Thu, 06 Jul 2023 18:16:09 GMT

Sorry! Yes the value is 3

Re: What is the purpose of DEMO_CAMERA_BUFFER_COUNT in demo csi_mipi_yuv.c?

Miguel04 — Thu, 06 Jul 2023 18:42:43 GMT

@Mc2023

It is a parameter for the camera used, on the readme file the example says it use the OV5640 camera, and in the datasheet it is specified that the camera needs Two frames after the strobe request is submitted, the third frame is correctly exposed.

Best Regards, Miguel.