HDMI Intel® Arria 10 FPGA IP Design Example User Guide

ID 683156
Date 11/12/2021
Public

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4.3.3.1.2. hdcp1x_tx_kmem.v and hdcp1x_rx_kmem.v files

For hdcp1x_tx_kmem.v and hdcp1x_rx_kmem.v files
  • These two files are sharing the same format.
  • To identify the correct HDCP1 TX DCP key file for hdcp1x_tx_kmem.v, make sure the first 4 bytes of the file are “0x01, 0x00, 0x00, 0x00”.
  • To identify the correct HDCP1 RX DCP key file for hdcp1x_rx_kmem.v, make sure the first 4 bytes of the file are “0x02, 0x00, 0x00, 0x00”.
  • The keys in the DCP key files are in little-endian format. To use in kmem files, you must convert them into big-endian.
Figure 34. Byte mapping from HDCP1 TX DCP key file into hdcp1x_tx_kmem.v

This figure shows the exact byte mapping from HDCP1 TX DCP key file into hdcp1x_tx_kmem.v. The same mapping applies to hdcp1x_rx_kmem.v.

Note: The byte number displays in below format:
  • Key size in bytes * key number + byte number in current row + constant offset + row size in bytes * row number.
  • 308*n indicates that each key set has 308 bytes.
  • 7*y indicates that each row has 7 bytes.
Figure 35. HDCP1 TX DCP key file filling with junk values
Figure 36. Wire Arrays of hdcp1x_tx_kmem.v

Example of hdcp1x_tx_kmem.v and how its wire arrays map to the example of HDCP1 TX DCP key file in Figure 35.

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