Altera_Forum
Honored Contributor
11 years agoCan't use .SDC Example file without errors
Hi,
I am very new to this and trying to compile an application for an EPM7128S (yes, I know, it's very old). The compilation goes OK, but I was getting warnings that TimeQuest could not analyse the design because there was no constraints file present. After a bid of searching, I found the example .SDC file on the Altera website, containing the lines :- # constrain clock port clk with a 10-ns requirement create_clock -period 10 [get_ports clk] # automatically apply a generate clock on the output of phase-locked loops (plls)# this command can be safely left in the sdc even if no plls exist in the design derive_pll_clocks # constrain the input i/o path set_input_delay -clock clk -max 3 [all_inputs] set_input_delay -clock clk -min 2 [all_inputs] # constrain the output i/o path set_output_delay -clock clk 2 [all_outputs] 2 According to the web page, this basic example should be able to work on all designs. I was getting errors for a couple of LPM_counter modules that I had not declared as clocks, so I added the command "derive_clocks " which I think should find undeclared clocks? Anyway, with, or without the modification that I made, the compile fails with the following errors for the .sdc file Error (332000): More than 2 positional arguments specified: 2, _col4, 2 --------------------------------------------------------------------------- Usage: set_output_delay [-h | -help] [-long_help] [-add_delay] -clock <name> [-clock_fall] [-fall] [-max] [-min] [-reference_pin <name>] [-rise] [-source_latency_included] <delay> <targets> -h | -help: Short help -long_help: Long help with examples and possible return values -add_delay: Create additional delay constraint instead of overriding previous constraints -clock <name>: Clock name -clock_fall: Specifies output delay relative to the falling edge of the clock -fall: Specifies the falling output delay at the port -max: Applies value as maximum data required time -min: Applies value as minimum data required time -reference_pin <name>: Specifies a port in the design to which the output delay is relative -rise: Specifies the rising output delay at the port -source_latency_included: Specifies input delay already includes added source latency <delay>: Time value <targets>: Collection or list of output ports --------------------------------------------------------------------------- while executing "set_output_delay -clock clk 2 [all_outputs] 2" (file "MTXPlus_CPU.sdc" line 22) Can anyone tell me where I've gone wrong please? regards Dave