Read from a register that does not have all 0s as a default to verify that
the interface is functional. Output
when the read address is valid, and output
asserts when the read data/response is valid. If the interface is unresponsive, ensure that
the following conditions are met:
axi4lite_aclkinput is connected and toggling.
- The interface is not being held in reset, and
axi4lite_aresetnis an active-Low reset.
- The interface is enabled, and
s_axi_aclkenis active-High (if used).
- The main core clocks are toggling and that the enables are also asserted.