Dave Johnson 8a24ff94d1 AT90USB1286 PIO cleanup and optimization (#11230)
-normalize `env` and `board` to lowercase naming convention.
-make board `name` follow descriptive convention.
-implement `-fsingle-precision-constant` compile optimization per https://github.com/MarlinFirmware/Marlin/pull/11178#issuecomment-401673901
-fix typo in 5DPRINT entry.
2018-07-26 05:58:28 -05:00
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2017-09-20 19:48:21 -05:00
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