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M42: Prevent unwanted pin mode switch to output #22493

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Merged
merged 6 commits into from
Aug 5, 2021
Merged

M42: Prevent unwanted pin mode switch to output #22493

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4a50387
M42: Prevent unwanted pin mode switch to output
tpruvot Aug 2, 2021
952680b
Forgot an input type...
tpruvot Aug 2, 2021
2e2c498
Update M42.cpp
thinkyhead Aug 2, 2021
123fc3f
M42: handle OD outputs for maple/STM32F1 too
tpruvot Aug 3, 2021
3877f5a
Tweak and test push
thinkyhead Aug 3, 2021
326fc36
Untweak and test push
thinkyhead Aug 4, 2021
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20 changes: 14 additions & 6 deletions Marlin/src/gcode/control/M42.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -68,12 +68,20 @@ void GcodeSuite::M42() {
case 0: pinMode(pin, INPUT); avoidWrite = true; break;
case 1: pinMode(pin, OUTPUT); break;
case 2: pinMode(pin, INPUT_PULLUP); avoidWrite = true; break;
#ifdef INPUT_PULLDOWN
case 3: pinMode(pin, INPUT_PULLDOWN); avoidWrite = true; break;
#endif
#ifdef INPUT_ANALOG
case 4: pinMode(pin, INPUT_ANALOG); avoidWrite = true; break;
#endif
case 3:
#ifdef INPUT_PULLDOWN
pinMode(pin, INPUT_PULLDOWN);
avoidWrite = true;
#endif
break;
case 4:
#ifdef INPUT_ANALOG // STM32
pinMode(pin, INPUT_ANALOG);
#elif defined(MAPLE_STM32F1)
_SET_MODE(pin, GPIO_INPUT_ANALOG);
#endif
avoidWrite = true;
break;
#ifdef OUTPUT_OPEN_DRAIN
case 5: pinMode(pin, OUTPUT_OPEN_DRAIN); break;
#endif
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