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Don't load REF pin of MAX1968 chip on HWRevs < 3.0 #103

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sb10q merged 1 commits from atse/thermostat:stop_loading_vref into master 2024-04-24 18:04:56 +08:00
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Author SHA1 Message Date
atse 09be55e12a Don't load REF pin of MAX1968 chip on HWRevs < 3.0 
The REF pin of the MAX1968 on hardware revisions v2.x is missing a
buffer, loading the pin on every CPU ADC read. Avoid reading from it and
leave the pin floating on affected hardware revisions, and return the
nominal 1.5V instead.
 2024-04-03 16:32:57 +08:00