[dm8168] when use ecpy or dat to move data, the l2 buffer address needs add 0x40000000, why?

Eric Mao

Hi, all

I use DM8168 EVM , 560v2 emulator, ccsv5.4

My coustom alg code will use EDMA to move data. So I use ECPY and DAT to test EDMA on EVM. And found when want to write data to L2, the address need used as the value list in coretex-a8 memory map table, or the edma didn't move data. why?

over 11 years ago

0 Badri Narayanan over 11 years ago

TI__Guru 59700 points

Are you referring to EDMA usage on c674 ? You should use L3 address for GEM L2 SRAM (UMAP0) when using EDMA as EDMA IP is outside GEM and requires the L3 address

0 Eric Mao over 11 years ago in reply to Badri Narayanan

Genius 4330 points

Yes, I want use EDMA on C674.

I configure the ECPY the same as the OSD Link done. The address of EDMACC is 0x09000000. but in function SWOSD_TI_initResources, the value of dmaHandle->edma_params_array[i] use 0x49007c00, why their address didn't in the same map range.

5482.alg_dma_framework.cfg

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[dm8168] when use ecpy or dat to move data, the l2 buffer address needs add 0x40000000, why?