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Is there a simple, automated way of placing vias from a data bus in a binary pattern to instances like decoders?
Can you include a picture? I think the interactive router can create busses but I'm not sure how to execute it from SKILL.
In reply to theopaone:
In reply to jaleco:
Assuming that you have the connectivity described in a source schematic, this is precisely the kind of thing that the pin to trunk router capability of VSR is good at - you select the horizontal bus and use "Compose Trunk" to mark them as trunks, and then use the Pin to Trunk mode to route them all up.
There's a Rapid Adoption Kit on using the Pin to Trunk router which can be found on the support site here.
In reply to Andrew Beckett:
thank you so much for the tip. I will read more about both kits on pin to trunk routing. For clarification, it looks like these kits are meant for version 6, and XL mode - is that correct? I do some work still in v5, in L mode, for lack of licenses. Can the kits be installed with v5?
The Virtuoso Space-based Router only exists in IC61X, and this functionality is for IC616 in particular. It also requires some GXL licensing (the router requires VLS GXL tokens).
If you want this with L in IC5141, you'll have to write some dedicated SKILL code; I don't think you'll find anything built-in which does quite what you want in such an old release. Sorry!
Being without the GXL license for either version 5 or 6, I adapted the SlotMetal.il form to create a Program Binary Bus form, and changed its enterPath function to an enterPoints function.
The attached code will accept points for via connections between a data bus and the least significant instance in a one-dimensional array - eg row or column of decoders - and place all the remaining via connections to the array.
It incorporates some checks for duplicate point entry and to ensure there are sufficient bits to program the number of instances in the array. This is only set up to operate using v5 commands, but it shouldn't be too hard to modify. I have already included a variable in the code to store the results of dbGetDatabaseType(), but it isn't used.
Assumptions are that the data bus has consistent pitch between all signals and uses the same via connection for all inputs; there is consistent pitch between each true and complement pair (this does not require them to be adjacent though); the programming is conventional binary order from least significant instance to most significant in one direction (up, down, left or right) - no mirroring.
The core of the program uses the via parameters from the form to create a via symbolic for each point entered, for each cell instance, using a binary repeating pattern, modifying the X or Y coord for each via placement with respect to the initial point selected for each respective bit from LSB to MSB.
I don't have the benefit of the SKILL IDE and it hasn't been evaluated and given a LINT score, so please forgive any opportunities to improve the code!