DCMI DMA STM32U5

[shubhenduatadben]

Hi,

I'm developing a camera interfacing application. I've used GPDMA in linear-circular mode. But, now I have to handle larger resolution(640x480). Is there any application example from where I can start configuring DMA in CubeMx?

[Imen.D · Accepted solution]

Hello @shubhenduatadben ,

You can start with examples in our STM32CubeU5 firmware package (based on BSP driver and HAL Driver) that can help you in your camera configuration:

• STM32CubeU5/Projects/STM32U575I-EV/Examples/DCMI/DCMI_ContinousCap_EmbeddedSynchMode
• STM32CubeU5/Projects/B-U585I-IOT02A/Examples/BSP.
• STM32CubeU5/Projects/STM32U575I-EV/Examples/BSP/
• STM32CubeU5/Projects/STM32U575I-EV/Demonstrations
• STM32CubeU5/Projects/STM32U575I-EV/Demonstrations/Modules/cameraviewer

I advise you to take a look to these resources that may help you on your project configuration:

• AN5020: Introduction to digital camera interface (DCMI) for STM32 MCUs (precisely this section: 6.4.9 DMA configuration for higher resolutions)
• AN5593 How to use the GPDMA for STM32 MCUs (3.3 GPDMA configuration for graphic peripherals section).

I found this tutorial for you : Using a Camera Module with the B-U585I-IOT02A Discovery Board

[shubhenduatadben]

Hi Imen,

    Thanks for your reply. I followed the tutorial referred by you. But the result is, HAL_DCMI_FrameEventCallback triggers only for 320x240 size RGB565 capture mode. On starting DCMI for  640x480 size RGB565, the callback never triggers. What I also notice that the buffer isn't filled properly, it's mostly empty.

Here is the env details:

MCU: STM32U5G9BJYXQ

STM32CubeIDE: 1.16.1

STM32U5 series: 1.6.0