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Altera_Forum
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16 years ago

memory-to-memory sgdma problem

Hello, I am testing the sgdma core by copy data from one on-chip-memory buffer to the other. However, I met a confusing problem that the actual_transfered_bytes is always zero. Can anybody he...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

If you have a data cache enabled, it will probably prevent you from reading the updated values.

You can use alt_remap_uncached() to change a pointer value to something that will force the CPU to bypass the cache.