DCMI and DMA to save multiple images on RAM
I'm currently evaluating the STM32U5 series to connect to a camera via DCMI and store video (i.e., multiple frames/images). For now, I would like to keep things simple and also learn how the DCMI and DMA workflow is like. So, I'll keep this forum post focused on just simply save multiple frames into RAM (see below for more details).
I'm using the STM32U575I-EV and its provided example for DCMI as the base of my code. It seems like, for this example, there's a buffer large enough only to hold 1 frame (CAMERA_FRAME_BUFFER). That's expected, since the example code just displays the frame and has no use for it anymore. But I would like to know where in the code I would need to adjust so that it saves multiple frames. I've tried looking through the documentation but frankly I keep getting lost with the workflow going on.
Thank you in advance for your help; let me know if you need more info! This is the setup I'm working with.
- MCU: STM32U575I-EV
- Camera: OV5640 (included / part of the EV; see STM's MB1379)
- Code/Project: STM32Cube_FW_U5_V1.4.0\Projects\STM32U575I-EV\Examples\DCMI\DCMI_ContinousCap_EmbeddedSynchMode
- IDE: STM32CubeIDE 1.14.1
- Resources: AN5020 Rev 3
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More details - For this project the end goal for storing video is to get the frames packaged up into an AVI file and stored on an SD card that would be accessed via SDMMC. I'll get a separate post for that eventually; but if by any chance this is an entirely different workflow compared to what's discussed in this post, please let me know and I'll expedite making the separate post.