Why are bits[1:0] of the CvP Status Register 0 when my fabric image is encrypted and/or compressed?

Description

Bits[1:0] of the CvP Status Register now default to 0, to allow both compression and/or encryption fabric options to be changed easily during development. Previously the fabric image type was set by these bits.

Resolution

Users should now specify to the driver whether the data is compressed before starting the CvP transfer (so that the CVP_NUMCLKS is set to the appropriate value based on this user input).

When using the quartus_cvp tool, this can be achieved with the -c and -e flags for compression and encryption, respectively.

Note# If CVP_NUMCLKS is not set to the right value based on the type of fabric being sent, a CvP error will occur and the transfer will fail.