I have coded a framework for a PAL video application with 3 framebuffers:
Video In over PPI and DMA to framebuffer x (SDRAM)
Video Out over DMA and PPI from framebuffer x-2 (SDRAM)
So far the application works correct. But from the main loop of the program I need
an access to the framebuffer x-1 (working buffer for image manipulation). If I try to
read a byte from the framebuffer, the main loop stopps. The interrupt controlled
PPI/DMA process is working on. In this case I can not stop the debug session.
The reaction of VisualDSP++ is the following message:
"JTAG scan failed
DSP could not clear EMUIR"
I think the problem are missing or wrong entries in the linker description file, but I have
no idea to solve the problem.
The declaration of the framebuffers are:
and I define a User Heap of 20 MB in Project Options.
Thank You for any help,