Besides the reply shared by @Andrew Neil , I advise you to refer to this AN5020 Application note “Digital camera interface (DCMI) for STM32 MCUs�?, that may help you.
Kaouthar
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A complex system that works is invariably found to have evolved from a simple system that worked.A complex system designed from scratch never works and cannot be patched up to make it work.
Most here are not using this combination of devices, and have their own projects/agendas.
Not clear what's "not working" in the build, interfacing and test process, you might want to engage directly with the author of that, or other projects, but remember they might not want to spend time debugging and diagnosing others issues. These materials are usually posted "As Is"
Perhaps look at STM32F4 EVAL boards these typically provide for camera interfaces.
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Besides the reply shared by @Andrew Neil , I advise you to refer to this AN5020 Application note “Digital camera interface (DCMI) for STM32 MCUs�?, that may help you.
Kaouthar
To give better visibility on the answered topics, please click on "Best answer" on the reply which solved your issue or answered your question.