Altera Arria V Avalon-ST - Manual (Page 190)

Table 16-16: Read Descriptor 1
Offset in BFM
Shared Memory
Value Description
DW0 0x920 1,024 Transfer length in dwords and control bits as described in on
page 18–15
DW1 0x924 0 Endpoint address value
DW2 0x928 10 BFM shared memory data buffer 1 upper address value
DW3 0x92c 0x10900 BFM shared memory data buffer 1 lower address value
Data
Buffer 1
0x10900 Increment by 1
from 0xBBBB_
0001
Data content in the BFM shared memory from address:
0x10900
Table 16-17: Read Descriptor 2
Offset in BFM
Shared Memory
Value Description
DW0 0x930 644 Transfer length in dwords and control bits as described in on
page 18–15
DW1 0x934 0 Endpoint address value
DW2 0x938 0 BFM shared memory upper address value
DW3 0x93c 0x20EF0 BFM shared memory lower address value
Data
Buffer 2
0x20EF0 Increment by 1
from 0xCCCC_
0001
Data content in the BFM shared memory from address:
0x20EF0
2. Sets up the chaining DMA descriptor header and starts the transfer data from the BFM shared memory
to the Endpoint memory by calling the procedure
dma_set_header
which writes four dwords,
DW0:DW3 into the DMA read register module.
Table 16-18: DMA Control Register Setup for DMA Read
Offset in DMA Control
Registers (BAR2)
Value Description
DW0 0x0 3 Number of descriptors
and control bits as
described in Chaining
DMA Control Register
Definitions.
16-20 DMA Read Cycles
2014.12.15
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