Perhaps Altera is slowly supporting VHDL iteration limits, though the feature to change it away from 10,000 is not there yet.Īs with others, I suggest you file a case with Altera.
![modelsim iteration limit reached modelsim iteration limit reached](https://www.mathworks.com/help/examples/mpc/win64/UseSuboptimalSolutionInFastMPCExample_03.png)
I saw that there is no option for us to change the iteration limit (though the one for Verilog is still there):Īssignments > Settings > Analysis & Synthesis Settings > More Settings > Iteration limit for (non-)constant Verilog loops Anyway, you got me checking back on this again. It didn't seem to make any sense that they could do for one language and ignore the other. The case I filed to Altera points to the fact that Quartus supports Verilog iteration limits, but not for VHDL. By default, when the maximum number of iterations is reached. For your case, seems like Quartus did finally give an error when the iteration limit is reached. In such cases, the worst-case execution time can exceed the limit that is allowed on the.
![modelsim iteration limit reached modelsim iteration limit reached](https://i.ytimg.com/vi/fD90JSv-MbU/maxresdefault.jpg)
I remember ModelSim giving me an "iteration limit reached" error, but Quartus failed to give me any error at the time. This reminds me of a case I filed to Altera a long time ago. When you submit to Altera, might also ask if there is any way to modify that 10,000 limit so that you can work around this limitation in their tool. Rom_tmp(cpt) := to_signed(integer(real(AMP)*sin( Impure function SinFillTab return rom_type is The iterationlimit default value is 5000. modelsim.ini file, or by setting a Tcl variable called IterationLimit (A-395). You can set the iterationlimit from the Options > Simulation menu, by modifying the. Last sentence is killing me as it sounds too silly to be true !!! When the iterationlimit is exceeded, vsim stops the simulation and gives a. Statement that terminates the loop after N >" Iterations, you can bypass this error by adding an explicit exit If you can guarantee that your loop will exit within 10,000 Integrated Synthesis prematurely terminated the synthesis of your design.ĪCTION: Check the loop for errors or non-constant terminatingĬonditions. To avoid an infinite loop or memory exhaustion, Quartus II Have forgotten to increment a variable in the loop's terminatingĬondition. This message may occur because the loop's terminatingĬondition depends on a signal or non-constant variable. you specified a loop that does not terminate within 10,000 Modelsim Error: (vsim-3601) Iteration limit reached at time 29605 ns.
#Modelsim iteration limit reached code
in your code there might be loop which never ends, this problem mainly occurs. So quartus reallyĪnd all works beautifully if the loop size stays below 10000 iterations. check whether the tool is evaluation copy,it has limitations. The memory initialization file, as expected. times): Error: (vsim-3601) Iteration limit reached at time 2350 ns.
#Modelsim iteration limit reached manual
None of those loops actually synthesize into hardware they just generate ModelSim Users Manual PDF, HTML select Help > Documentation ModelSim Command. It is indeed a ROM using RAM blocks and the loop is the fill in of the