Associate III

Question

STM32H750VBT6 DCMI USART

With DCMI (with DMA) and USART only 1.5FPS, why is the frame rate really low?

The output is set to QVGA and formatted as JPEG.

Guru

Probably because the bandwidth of.the UART is very low?

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Associate III

I set the baudrate to 912600, and the camera output is JPEG, so I don't think USART is too slow.

Guru

Depends on image size and efficiency. Frame rate suggests images about 60KB

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Technical Moderator

Hello @Shiina ,

Which camera sensor are you using? Are you encountering the same behavior with RGB?

Thank you.

Kaouthar

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Associate III

Thanks, I'm using ov2640, which outputs the jpeg directly.

Technical Moderator

Hello @Shiina ,

I advise you to take a look at JPEG data capture section in AN5020 may help you to check the DCMI configuration.

Do you have the same issue with a different mode and image size?

Thank you.

Kaouthar

To give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.

Associate III

Thank you. I haven't tested anything else yet.

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