Problem with downloading of a NIOS II program

Honored Contributor

8 years ago

Indeed, I've just tried another design, that uses SDRAM memory (instead of on-chip memory) and the issue repeated.

Here is Qsys screenshot of this design:

Concerning timing constraints, compilation report didn't reveal any violation. Here they are:

create_clock -name clk -period 20 [get_ports clk]

create_clock -name {altera_reserved_tck} -period 40 {altera_reserved_tck}

set_input_delay -clock altera_reserved_tck -clock_fall 3 [get_ports altera_reserved_tdi]

set_input_delay -clock altera_reserved_tck -clock_fall 3 [get_ports altera_reserved_tms]

set_output_delay -clock altera_reserved_tck 3 [get_ports altera_reserved_tdo]

derive_clock_uncertainty

set_false_path -from [get_ports sw*]

set_false_path -from [get_ports key*]

set_false_path -from [get_ports sdram_dq*]

set_false_path -from * -to [get_ports led*]

set_false_path -from * -to [get_ports hex*]

set_false_path -from * -to [get_ports sdram*]

So, apparently, the issue with failed nios ii downloading is quite recurrent, and there is no any reliable remedy against it.

Am I right ?

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