How to capture an image and store it on an SD card using the STM32F407 Discovery board and OV7670 camera module?

[Imen.D]

Hello @MMOHA.1​ ,

You may get inspired from the example within STM32CubeF4 MCU package:

STM32Cube_FW_F4_V1.27.0\Projects\STM324xG_EVAL\Applications\Camera\Camera_To_USBDisk

Hope this helped you!

When your question is answered, please close this topic by choosing Select as Best.

Imen

[Tesla DeLorean]

https://community.st.com/s/question/0D53W00001SNRChSAP/interfacing-an-stm32f407-discovery-board-with-an-ov7670-camera-module-and-sd-card

[MMOHA.1]

Thank you for your reply

I have opened this example STM32Cube_FW_F4_V1.27.0\Projects\STM324xG_EVAL\Applications\Camera\Camera_To_USBDisk.

And found that DMA2 Stream1 channel1 is configured to transfer the picture from DCMI peripheral

to an external RAM used by the LCD as a frame buffer.

In my project, I can not use LCD I want to save the picture directly to the SD card.

The question is:

Is this possible to save the picture directly to the SD Card or It is necessary to use an external ram as a frame buffer?

And if It is necessary to use an external ram as a frame buffer can you recommend a suitable external ram to use with the STM32F407 Discovery board?

Thank you in advance.

[Piranha]

That depends on the size and format of the image and on the resources used by the rest of the system. Look at the specifications and do the math!