Hi,
I am using an evm(SEED-DEC6437) developed by SEED(a Chinese manufacturer) . I want to develop my image processing project without using BIOS. And I found a group of examples from the Internet which looks likely provided by TI. I have met some problems now:
1.There is a video_loopback project. This project just initialize the VPFE and VPBE to the same DDR2 address, I can not find the frame synchronization between the VPFE and VPBE(maybe there is no synchronization at all because the acquisition time is very short and the display time of a frame is relatively long).
2.What should I do if I want to make a notice to the main program that a frame has been received and saved to the DDR2? It seems that the interrupt of the CCDC(VDINT0/VDINT1) just notices the accomplishment of image acquisition of a frame but not the data transfer to DDR2. And there is no CCDC EDMA event neither(only resizer/histogram/previewer/H3A event).
3.How can I display a frame at my wish when the notice is made? It seems that the VPBE display the data of the assigned buffer automatically and can't be controlled manually. So maybe I need to construct multiple buffers to store the processed image data and change the display buffer pointer of VPBE circularly.
Thanks!
Regards,
Shiwei