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Honored Contributor
Honored Contributoruse descriptor chain in SGDMA
Hi all My current goal is to use SGDMA (ST-to-MM) to transfer video data to a memory. Later on, I'll replace the memory by PCIE IP. My problem is how to use descriptor chain in SGDMA. ...
Altera_ForumHonored Contributor
Honored ContributorIIRC the alt_avalon_sgdma_construct_stream_to_mem_desc function ensures that the data cache is flushed correctly.
Your settings look fine. The different memory regions (text, data, heap, stack, bss) are defined in the BSP settings but I was just asking this question in case you were using a table defined as a global variable, or a buffer allocated with malloc(). As you are using a pointers with directly the correct address as defined in system.h it should be fine. Could you have a look at your BSP settings nevertheless and check that you don't have any memory region configured to your on-chip memory right now? maybe your software is overwriting the descriptors.
