DCMI High resolution

[Javad]

Hi,

I try to make stm32l496 as a video camera device. I use Ov5640 sensor. The aim is that taking photos and send them to the host device directly (like a webcam). 

The challenge is that when I try to use high resolutions, due to I don't use any memory, how I can handle it and send the data through otg? I want to use WVGA resolution (800x480) with JPEG format.

[Imen.D]

Hello @Javad,

You should consider some parameters like: the pixel clock, the supported data format...

Higher resolution require maximum DCMI pixel clock.

You can check the product datasheet, and I recommend that you refer to this AN5020 Digital camera interface (DCMI) on STM32 MCUs

that helps you on DCMI configuration.

Imen

[Imen.D · Accepted solution]

Hi @Jävad Maleki​ ,

For DCMI High resolution, you should use the Double-buffer mode.

But, the Double-buffer mode is not available in STM32L496 devices.

You can refer to the section "4.4.8 Double-buffer mode for medium resolutions (snapshot or continuous capture)" in this AN5020 Digital camera interface (DCMI) on STM32 MCUs

 

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Imen