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1. #ADLSOFT MULTICLOCK UPDATE#
2. #ADLSOFT MULTICLOCK VERIFICATION#
3. #ADLSOFT MULTICLOCK SOFTWARE#
4. #ADLSOFT MULTICLOCK FREE#

The following should be legal though ( posedge clk1 ) s1 # 1 '1b1 # 1 ( posedge clk2 ) s2 For example, if clk1 and clk2 are not identical, then the following are illegal: */ ( posedge clk1 ) s1 # 2 ( posedge clk2 ) ( posedge clk1 ) s1 intersect ( posedge clk2 ) s2 Sequence_expr # 1 `true |-> property_exprĪp1 : assert property ( ( posedge clk1 ) $rose (a ) |=> ( posedge clk2 ) b ) // equivalent toĪp1 : assert property ( ( posedge clk1 ) $rose (a ) # 1 1'b1 |-> ( posedge clk2 ) b ) // same asĪp1 : assert property ( ( posedge clk1 ) $rose (a ) # 1 ( posedge clk1 ) 1'b1 // clock flow through |-> ( posedge clk2 ) b ) /* 1800'2017 Differently clocked or multiclocked sequence operands cannot be combined with any sequence operators other than #1 and #0. Sequence_expr |=> property_expr // is equivalent to:

#ADLSOFT MULTICLOCK VERIFICATION#

Real Chip Design and Verification Using Verilog and VHDL($3)

#ADLSOFT MULTICLOCK FREE#

** SVA Handbook 4th Edition, 2016 ISBN 978-1518681448ġ) SVA Package: Dynamic and range delays and repeats Ģ) Free books: Component Design by Example See the explanation with an example that I provided in my SVA bookįor training, consulting, services: contact The nearest possibly overlapping tick of the second clock, where the second sequence begins. ADLSoft MultiClock - Shareware - more info.

#ADLSOFT MULTICLOCK SOFTWARE#

Also: always use always_ff or always_comb, never use always.( posedge slow_clk_A ) $changed (A ) |-> # 1 ( posedge fast_clk_B ) $changed (B ) // is same as ( posedge slow_clk_A ) $changed (A ) |-> ( posedge slow_clk_A ) 1 # 1 ( posedge fast_clk_B ) $changed (B ) // The sampling is at the nearest strictly subsequent tick of the second clock, // vs ( posedge slow_clk_A ) $changed (A ) |-> ( posedge fast_clk_B ) # 1 $changed (B ) Free adlsoft uncompressor download software at UpdateStar - 1,746,000 recognized programs - 5,228,000 known versions - Software News. This must also be added to your property. The reset can be synchronous or asynchronous as you choose. That is, both x and temp should have resets local to their individual clock domains. The flipflops created should have resets. (1'b1, x = x) #0 (1'b1, x = x) #0 out = x ^ x Multiclock Mode and HDL Coder Optimizations Multiple synchronous clocks can be useful even for a design with only a single Simulink rate.

#ADLSOFT MULTICLOCK UPDATE#

If the above doesn't work, or if it seems like a waste to start parallel assertions checking the same thing, the following code might work.Įdit2: Put x inside property and changed two final lines in property to update x to correct values. Thus you cannot check the value made by some other instance of this assertion. I removed the out = x ^ x check from line #3 because x is local to the property. Thus t will be updated to the new value on every posedge of clkA and you will have n assertions checking the same thing(which isn't a problem). A possible fix might be to declare the variable t outside the property scope. I must admit that I am hazy on the scoping of values local to a property, but check if this is causing you troubles. Lastly, what happens if clkA is much faster than clkB? Several assertions will start in parallel and disagree on the actual value of t on the first posedge of clkB. In that case the following would be more correct, although the previous code might still work. The way I read this the assertion should start on every clkA, and then a sequence will always follow. Line #2 is not e prerequisite for line #3, and the same can be said for line #3 and line #4.

In my experience a non-overlapping implication will cause the assertion to sample not on the next clkB, but skip one clkB and then sample on clkB.įurthermore I don't quite understand why you are using implications all the way through your assertion. That is, with a overlapping implication in the clock handover.