Image Capture using STM32F2

[abhilashajain139]

Posted on March 27, 2015 at 05:21

I have developed a stm32f207 board for my own application. I have interfaced a 14 bit grayscale camera using DCMI. I'm then transferring this image to the SRAM using DMA. 

The SRAM being used is the same present on the stm32f220-g eval board. And I'm using ST's eval board library function for FSMC initialisation. Once the entire image (640 * 512) is in the SRAM, I transfer it to the PC and display it using MATLAB. The images look like this;As observed, there's shift after every few lines and even though it looks like the image is there it's not quite correct.Could someone guide me where things are going wrong? 

[Tesla DeLorean]

Posted on March 27, 2015 at 11:23

Seem to be interleaving some large, but uniform, size chunks.

The image is quite large for a single DMA operation, so is suspect it's being done in multiples. Look at your camera data sheet, look at the settings it's using, look at how you're reading/storing the image, look at how you're uploading the image, look at how MATLAB is decoding the image. Speak to someone familiar with the camera and it's operation.