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Altera_Forum's avatar
Altera_Forum
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14 years ago

DMA problem

why when i use my dma, the program stucks here: --- Quote Start --- while (!rx_done); printf ("Transfer successful!\n"); --- Quote End --- pls help! thanks!
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

Single access to flash memory requires at least 60 to 120ns depending from your flash speed grade. then 64kb requires at least a few millisecs. The transfer time will certainly be longer (both with cpu and dma transfer) because of bus contention or other instrinsic delays.

Then, if you have a timer which can measure intervals in the ms range you can easily make the test with 64kb.