Re:Reverse engineering the VW electronic control unit
by Washuu on Saturday January 09, 2016 @06:50AM
(#10870934)
Back in the 1990s using almost exclusively LUTs made sense due to less processing power. The Chrysler JTEC PCM has three Motorola 68HC microcontrollers working in tandem. One for fuel, one for ignition, and one that ties it all back together with other sensors.
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Re:Reverse engineering the VW electronic control unit
by jacquesm on Saturday January 09, 2016 @06:54AM
(#10870946)
The other reason is to make the device work in a deterministic manner.
Re:Reverse engineering the VW electronic control unit
by TeMPOraL on Saturday January 09, 2016 @09:25AM
(#10871328)
And in general, not recomputing things that should not be recomputed sounds like very good engineering to me. In the wider software world, we're way too eager to waste computational resources on pointless things.