How to allocate several different size continuous memory for DSP size ?

KAKA

HI everyone!

The memory that DSP side use must be continuous . It should be changed into physical address from virtual address before send to DSP side. my codec need several different size memory for runing. No mater how I try ,It always had conversion problem. can anyone tell me the correct way to allocate these memory ? thank you !

over 17 years ago

0 Bernie Thompson TI over 17 years ago

TI__Mastermind 41665 points

The solution TI came up with for this is the CMEM kernel module (driver), using CMEM you can allocate arbitrary sized contiguous buffers for use in communicating with the DSP.

0 Juan Gonzales over 17 years ago

TI__Mastermind 37340 points

Another thing to consider is that CMEM has a defined range within your overall system; therefore, you are free to change the number and size of buffers in CMEM. However, if you need to increase (or decrease) the overall CMEM memory range, then you may find the following wiki article useful

http://wiki.davincidsp.com/index.php?title=Changing_the_DVEVM_memory_map

0 KAKA over 17 years ago

Prodigy 130 points

Got it . I will have a try! thank you!

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How to allocate several different size continuous memory for DSP size ?