Also: always use always_ff or always_comb, never use always. This must also be added to your property. The reset can be synchronous or asynchronous as you choose. An added USB connection means that users can send MIDI messages from a DAW while simultaneously synchronizing with an audio clock. That is, both x and temp should have resets local to their individual clock domains. The Multiclock can be synchronized with incoming MIDI clock, DIN Sync, or analog clock signals from a modular synthesizer system. The flipflops created should have resets. 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. Like one offset value for recording and one for monitoring through the DAW to adjust for plug-in latency and audio card (and overbridge) buffer settings. In that case the following would be more correct, although the previous code might still work. My guess is having machine sequencer sync set to off and letting the E-RM Multiclock (or in my case Innerclock Sync-Gen 2) handle the clock and sequencer sync. It has been a bit of a process to find out how to use the audio input from the E-RM multiclock but now it seems to work. The Sync-Gen also provides transport control, the Multiclock doesnt. The way I read this the assertion should start on every clkA, and then a sequence will always follow. I think the Multiclock / Sync-Gen is a better solution. Line #2 is not e prerequisite for line #3, and the same can be said for line #3 and line #4. Line connection card for LabVIEW applications Manchester Encoding or Conditioned Diphase for long, reliable, high speed self clocking lines Interfacing DAB. Synchronisation of the multiclock to a DAW relies on a sample accurate audio clock stream, which in consequence guarantees absolutely tight clock signals with 1 sample of jitter. 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.
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