STM32H747 with OV5460 low frame rate

[KHowe]

I am using STM32H747 MCU with OV5460 camera. The FPS i got from the camera is around12-13 fps is that any method to increase the frame rate.

I tried by increase PLL clock but there is no image received.

Thanks

[KDJEM.1]

Hello @KHowe;

I recommend you to look at How to improve DCMI frame rate: An example using a ov5640 camera module.  This article explains how to increase the DCMI frame rate of an existing example, which is DCMI_ContinousCap_EmbeddedSynchMode in STM32CubeU5 package, from 7.5 fps to 15 fps.

So, I advise you to refer to this article to increase the frame rate.

Thank you.

Kaouthar

[KHowe]

yes i follow the steps and it dint give me much improvement. Is the MCU unable support high fps on this? my target is  800*600@60fps

[KDJEM.1]

Hello @KHowe;

Thank you for updating the post and providing more details about the target.

To achieve the target resolution and the frame rate, you need to refer to the OV5640 datasheet, and STM32H747 datasheet and check all constraints.

As mentioned in the OV5640 datasheet, to reach 1280x720 resolution and 60 fps frame rate, you need to configure the pixel clock at 96 MHz.

But when we refer to the STM32H747 datasheet, we see that the maximum pixel clock is 80 MHz.

To reach higher frame rates, I recommend you to decrease the image resolution to ensure the maximum pixel rate constraints.

Thank you.

Kaouthar