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Avoid int8_t underflow on filament runout (#13895)

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This commit is contained in:
Tanguy Pruvot
2019-05-07 20:58:10 +02:00
committed by Scott Lahteine
parent 483822f3aa
commit 24e956d168
1 changed files with 5 additions and 2 deletions
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7
Marlin/src/feature/runout.h
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@@ -41,6 +41,9 @@
#endif #endif
//#define FILAMENT_RUNOUT_SENSOR_DEBUG //#define FILAMENT_RUNOUT_SENSOR_DEBUG
#ifndef FILAMENT_RUNOUT_THRESHOLD
#define FILAMENT_RUNOUT_THRESHOLD 5
#endif
class FilamentMonitorBase { class FilamentMonitorBase {
public: public:
@@ -337,11 +340,11 @@ class FilamentSensorBase {
class RunoutResponseDebounced { class RunoutResponseDebounced {
private: private:
static constexpr int8_t runout_threshold = 5; static constexpr int8_t runout_threshold = FILAMENT_RUNOUT_THRESHOLD;
static int8_t runout_count; static int8_t runout_count;
public: public:
static inline void reset() { runout_count = runout_threshold; } static inline void reset() { runout_count = runout_threshold; }
static inline void run() { runout_count--; } static inline void run() { if (runout_count >= 0) runout_count--; }
static inline bool has_run_out() { return runout_count < 0; } static inline bool has_run_out() { return runout_count < 0; }
static inline void block_completed(const block_t* const b) { UNUSED(b); } static inline void block_completed(const block_t* const b) { UNUSED(b); }
static inline void filament_present(const uint8_t extruder) { runout_count = runout_threshold; UNUSED(extruder); } static inline void filament_present(const uint8_t extruder) { runout_count = runout_threshold; UNUSED(extruder); }