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Fix MAX6675 SPI init conflict with TMC and others #20086

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merged 5 commits into from
Nov 11, 2020

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LinFor
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@LinFor LinFor commented Nov 10, 2020

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Description

Correct SPI init of TMC2130 and maybe others with MAX6675 attached on the same bus.

The MAX6675 does not have a MOSI signal, so it starts sending data on MISO as soon as the CS and CLK signal appears. Leaving MAX6675 CS uninitialized (probably floating or pulldown state) before TMC init results in broken data on bus and failed init.

Benefits

Correct SPI init of TMC2130 and maybe others with MAX6675 attached on the same bus.

Configurations

None special

Related Issues

Nothing found

@thinkyhead thinkyhead merged commit f4e9f36 into MarlinFirmware:bugfix-2.0.x Nov 11, 2020
FhlostonParadise pushed a commit to FhlostonParadise/Marlin that referenced this pull request Nov 21, 2020
Kannix2005 pushed a commit to Kannix2005/Marlin-1 that referenced this pull request Dec 7, 2020
vgadreau pushed a commit to vgadreau/Marlin that referenced this pull request Dec 9, 2020
tharts pushed a commit to tharts/Marlin that referenced this pull request Jan 6, 2021
dpreed pushed a commit to dpreed/Marlin_2.0.x that referenced this pull request Feb 5, 2021
kpishere pushed a commit to kpishere/Marlin that referenced this pull request Feb 19, 2021
W4tel-BiDi pushed a commit to W4tel-BiDi/Marlin that referenced this pull request Apr 5, 2021
thinkyhead pushed a commit to thinkyhead/Marlin that referenced this pull request Apr 28, 2021
thinkyhead pushed a commit to thinkyhead/Marlin that referenced this pull request Apr 29, 2021
thinkyhead pushed a commit that referenced this pull request Apr 30, 2021
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