As an example, the bandwidth
requirement is 2000 M bytes per second. The following figures show how to set the
bandwidth in the AXI NoC2 IP.
The Versal ISP TILE0_ISP0_NMU and TILE0_ISP1_NMU interfaces connect to the AXI NoC2 IP S00_AXI and S01_AXI interfaces.
- In the Inputs tab, connect the S00_AXI and S01_AXI AXI inputs to the
ISP.
- In the Outputs tab, connect the M00_AXI AXI output to the ISP.
- In the Connectivity tab, make valid and appropriate connections to access
the DDR or any other subordinate.
- In the QoS tab, when the Versal ISP core0 and
core1 are operating in non-MCM mode (number of streaming video inputs to core is
one), set the Bandwidth write (MB/s) as 2000 and Write Traffic Class as
ISOCHRONOUS for the S00_AXI and S01_AXI inputs to M00_INI and M01_INI outputs.
The M00_INI and M01_INI outputs connect to the DDR using one or more AXI NOC2 IP
instances.
- In the QoS tab, when Versal ISP core0 and
core1 are operating in MCM mode (number of streaming video inputs to core are
more than one), set the Bandwidth Read (MB/s) as 4000, Bandwidth write (MB/s) as
2000, Write Traffic Class and Read Traffic Class as ISOCHRONOUS for the inputs
S00_AXI and S01_AXI to Outputs M00_INI and M01_INI. The outputs M00_INI and
M01_INI connect to the DDR with the help of one more AXI NOC2 IP instances. In
MCM mode, Bandwidth write (MB/s) is twice the required as in this mode the
unprocessed streaming video input from multiple inputs is stored to DDR which
requires a bandwidth write of 2000 Mb/s, and an additional 2000 Mb/s is required
to store the processed video output on the DDR. A bandwidth read of 2000 Mb/s is
needed to read the unprocessed video input data from DDR and feed it to the ISP
core.
Note: In Non-MCM mode, unprocessed streaming video input is not stored to DDR, so the bandwidth write requirement is 2000 Mb/s.