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Save 7714 bytes of program memory when doing AUTO_BED_LEVELING_LINEAR (#7276)

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We can save more and a pile of RAM by eleminating the eqnBVector and
EqnAMatrix arrays next.
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Roxy-3D 2017-07-10 19:05:11 -05:00 • committed by GitHub
parent e5904c4df8
commit 9af67e2446
5 changed files with 28 additions and 1653 deletions
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40
Marlin/Marlin_main.cpp
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@ -261,7 +261,7 @@
#if HAS_ABL
#include "vector_3.h"
#if ENABLED(AUTO_BED_LEVELING_LINEAR)
#include "qr_solve.h"
#include "least_squares_fit.h"
#endif
#elif ENABLED(MESH_BED_LEVELING)
#include "mesh_bed_leveling.h"
@ -4336,8 +4336,8 @@ void home_all_axes() { gcode_G28(true); }
ABL_VAR int indexIntoAB[GRID_MAX_POINTS_X][GRID_MAX_POINTS_Y];
ABL_VAR float eqnAMatrix[GRID_MAX_POINTS * 3], // "A" matrix of the linear system of equations
eqnBVector[GRID_MAX_POINTS], // "B" vector of Z points
mean;
eqnBVector[GRID_MAX_POINTS], // "B" vector of Z points
mean;
#endif
#elif ENABLED(AUTO_BED_LEVELING_3POINT)
@ -4353,6 +4353,11 @@ void home_all_axes() { gcode_G28(true); }
#endif // AUTO_BED_LEVELING_3POINT
#if ENABLED(AUTO_BED_LEVELING_LINEAR)
struct linear_fit_data lsf_results;
incremental_LSF_reset(&lsf_results);
#endif
/**
* On the initial G29 fetch command parameters.
*/
@ -4549,11 +4554,7 @@ void home_all_axes() { gcode_G28(true); }
abl_should_enable = false;
}
#elif ENABLED(AUTO_BED_LEVELING_LINEAR)
mean = 0.0;
#endif // AUTO_BED_LEVELING_LINEAR
#endif // AUTO_BED_LEVELING_BILINEAR
#if ENABLED(AUTO_BED_LEVELING_3POINT)
@ -4616,11 +4617,11 @@ void home_all_axes() { gcode_G28(true); }
#if ENABLED(AUTO_BED_LEVELING_LINEAR)
mean += measured_z;
eqnBVector[abl_probe_index] = measured_z;
eqnAMatrix[abl_probe_index + 0 * abl2] = xProbe;
eqnAMatrix[abl_probe_index + 1 * abl2] = yProbe;
eqnAMatrix[abl_probe_index + 2 * abl2] = 1;
// mean += measured_z; // I believe this is unused code?
// eqnBVector[abl_probe_index] = measured_z; // I believe this is unused code?
// eqnAMatrix[abl_probe_index + 0 * abl2] = xProbe; // I believe this is unused code?
// eqnAMatrix[abl_probe_index + 1 * abl2] = yProbe; // I believe this is unused code?
// eqnAMatrix[abl_probe_index + 2 * abl2] = 1; // I believe this is unused code?
#elif ENABLED(AUTO_BED_LEVELING_BILINEAR)
@ -4794,6 +4795,11 @@ void home_all_axes() { gcode_G28(true); }
eqnAMatrix[abl_probe_index + 1 * abl2] = yProbe;
eqnAMatrix[abl_probe_index + 2 * abl2] = 1;
incremental_LSF(&lsf_results, xProbe, yProbe, measured_z);
#if ENABLED(AUTO_BED_LEVELING_LINEAR)
indexIntoAB[xCount][yCount] = abl_probe_index;
#endif
#elif ENABLED(AUTO_BED_LEVELING_BILINEAR)
z_values[xCount][yCount] = measured_z + zoffset;
@ -4894,7 +4900,11 @@ void home_all_axes() { gcode_G28(true); }
* so Vx = -a Vy = -b Vz = 1 (we want the vector facing towards positive Z
*/
float plane_equation_coefficients[3];
qr_solve(plane_equation_coefficients, abl2, 3, eqnAMatrix, eqnBVector);
finish_incremental_LSF(&lsf_results);
plane_equation_coefficients[0] = -lsf_results.A; // We should be able to eliminate the '-' on these three lines and down below
plane_equation_coefficients[1] = -lsf_results.B; // but that is not yet tested.
plane_equation_coefficients[2] = -lsf_results.D;
mean /= abl2;
@ -4916,7 +4926,7 @@ void home_all_axes() { gcode_G28(true); }
// Create the matrix but don't correct the position yet
if (!dryrun) {
planner.bed_level_matrix = matrix_3x3::create_look_at(
vector_3(-plane_equation_coefficients[0], -plane_equation_coefficients[1], 1)
vector_3(-plane_equation_coefficients[0], -plane_equation_coefficients[1], 1) // We can eleminate the '-' here and up above
);
}