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Improvements and bug fixes in sensor delay buffer for filament sensor code

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Improvement to avoid reinitializing delay buffer with every print. Fixed
issues in buffer indexing and memory out of bounds due to floating point
imprecision.  Simplified the code by avoiding conversion to standard
diameter and 1cu mm extrusion, which caused complications in determining
mm extruded.
This commit is contained in:
Filip Mulier
2014-08-16 06:50:13 -05:00
parent 85649a4549
commit 62db9848d3
4 changed files with 59 additions and 35 deletions
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28
Marlin/planner.cpp
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@ -743,15 +743,25 @@ block->steps_y = labs((target[X_AXIS]-position[X_AXIS]) - (target[Y_AXIS]-positi
#ifdef FILAMENT_SENSOR
//FMM update ring buffer used for delay with filament measurements
if(filament_sensor && (extruder==0)) //only for extruder 0
if((extruder==FILAMENT_SENSOR_EXTRUDER_NUM) && (delay_index2 > -1)) //only for extruder with filament sensor and if ring buffer is initialized
{
delay_dist = delay_dist + delta_mm[E_AXIS]; //increment counter with next move in e axis
if (delay_dist> (10*(MAX_MEASUREMENT_DELAY+1))) //check if counter is over max buffer size in mm
while (delay_dist >= (10*(MAX_MEASUREMENT_DELAY+1))) //check if counter is over max buffer size in mm
delay_dist = delay_dist - 10*(MAX_MEASUREMENT_DELAY+1); //loop around the buffer
if(delay_dist<0)
while (delay_dist<0)
delay_dist = delay_dist + 10*(MAX_MEASUREMENT_DELAY+1); //loop around the buffer
delay_index1=delay_dist/10; //calculate index
delay_index1=delay_dist/10.0; //calculate index
//ensure the number is within range of the array after converting from floating point
if(delay_index1<0)
delay_index1=0;
else if (delay_index1>MAX_MEASUREMENT_DELAY)
delay_index1=MAX_MEASUREMENT_DELAY;
if(delay_index1 != delay_index2) //moved index
{
meas_sample=widthFil_to_size_ratio()-100; //subtract off 100 to reduce magnitude - to store in a signed char
@ -761,10 +771,16 @@ block->steps_y = labs((target[X_AXIS]-position[X_AXIS]) - (target[Y_AXIS]-positi
delay_index2 = delay_index2 + 1;
if(delay_index2>MAX_MEASUREMENT_DELAY)
delay_index2=delay_index2-(MAX_MEASUREMENT_DELAY+1); //loop around buffer when incrementing
if(delay_index2<0)
delay_index2=0;
else if (delay_index2>MAX_MEASUREMENT_DELAY)
delay_index2=MAX_MEASUREMENT_DELAY;
measurement_delay[delay_index2]=meas_sample;
}
}
}
#endif