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Sequential outputs as clock inputs to other Sequentials trigger late in the simulator #191

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mkorbel1 opened this issue Nov 1, 2022 · 0 comments · May be fixed by #192
Open

Sequential outputs as clock inputs to other Sequentials trigger late in the simulator #191

mkorbel1 opened this issue Nov 1, 2022 · 0 comments · May be fixed by #192
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mkorbel1 commented Nov 1, 2022

Describe the bug

If the output of one Sequential is used as a clock trigger to another Sequential, the phased simulator can sometimes detect the edge and drive the outputs of the downstream Sequential one tick late.

This breaks clock dividers.

To Reproduce

Create a clock divider and connect a flop to the output of the divided clock.

Expected behavior

Divided clock properly triggers edge detection on Sequentials.

Actual behavior

Divided clock doesn't trigger edges properly, causing incorrect Sequential behavior.

Additional: Dart SDK info

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Additional: pubspec.yaml

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Additional: Context

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Fix bug related to clock divider simulation, fix #191 mkorbel1/rohd
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