Re: Digest for chisel-users@googlegroups.com - 3 updates in 1 topic

[Arsh G]

Thanks to both of you :))

The help was much appreciated.

On Tue, 5 Dec 2023 at 19:17, <chisel...@googlegroups.com> wrote:

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• Duplicating of Modules - 3 Updates

Duplicating of Modules

Arsh G <arsh....@gmail.com>: Dec 05 06:19AM -0800 Hi,   I'm trying to instantiate multiple instances of the same module in chisel for example   val X1 = Module(new Y(proto= ...)) val X2 = Module(new Y(proto= ...)) val X3 = Module(new Y(proto= ...)) val X4 = Module(new Y(proto= ...)) ... upto n times I've tried mapping them to List, so val X = Module(new Y(proto= ...)) val Y = (0 until n).map(x => X).toList   The chisel compiles but when I do hardware simulation I can only see one module not multiple ones in this method.   Can someone point out why this is happening, I've tried googling but of no help ? :(   Thank you

Edward Wang <edw...@berkeley.edu>: Dec 05 07:06AM -0800 Hi,   Thanks for your interest in Chisel. One thing to take a look at could be https://www.chisel-lang.org/docs/cookbooks/hierarchy#how-do-i-instantiate-multiple-instances-with-the-same-module-parameterization   Additionally, are all the modules used? FIRRTL/CIRCT I believe will remove unused hardware elements so that might be another possibility.   On Tuesday, December 5, 2023 at 9:19:28 a.m. UTC-5 arsh....@gmail.com wrote:   Hi,   I'm trying to instantiate multiple instances of the same module in chisel for example   val X1 = Module(new Y(proto= ...)) val X2 = Module(new Y(proto= ...)) val X3 = Module(new Y(proto= ...)) val X4 = Module(new Y(proto= ...)) ... upto n times I've tried mapping them to List, so val X = Module(new Y(proto= ...)) val Y = (0 until n).map(x => X).toList   The chisel compiles but when I do hardware simulation I can only see one module not multiple ones in this method.   Can someone point out why this is happening, I've tried googling but of no help ? :(   Thank you

Kevin Laeufer <lae...@berkeley.edu>: Dec 05 10:33AM -0500 Something that might also be worth trying is:   val Y = (0 until n).map(_ => Module(new Y(proto= ...))).toList   The difference here is that this now calls the constructor n times. The previous version was just copying the _reference_ to the module n times. I.e., you got n references to the same module instance.   - Kevin   On 12/5/23 10:06, 'Edward Wang' via chisel-users wrote:

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