Aligned address and wrap boundary calculation in AXI4

Amit Mishra 5 months ago

Is aligned address and wrap boundary are same in context to AXI4 ? I found both aligned address and wrap boundary to be 4096 (decimal)for a wrapping burst with 4 beats, transfer size 4 bytes and start address 4098 (decimal). I used the below formula's given in AXI4 to calculate aligned address and wrap boundary.

Aligned_Address = (INT(Start_Address / Number_Bytes) ) x Number_Bytes ( I rounded down 1024.5 to 1024)

Wrap_Boundary = (INT(Start_Address / (Number_Bytes × Burst_Length))) ( i rounded down 256.125 to 256)
× (Number_Bytes × Burst_Length).

Top replies

Colin Campbell 5 months ago +1 suggested

They are different things. An "aligned address" is an address used to calculate transfer addresses after the first transfer in an INCR transaction. AXI INCR transactions can use an unaligned start address...