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MarlinFirmware/Marlin/src/feature/mixing.cpp
2017-09-30 16:47:17 -05:00

84 lines
2.8 KiB
C++

/**
* Marlin 3D Printer Firmware
* Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
*
* Based on Sprinter and grbl.
* Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "../inc/MarlinConfig.h"
#if ENABLED(MIXING_EXTRUDER)
#if ENABLED(DIRECT_MIXING_IN_G1)
#include "../gcode/parser.h"
#endif
float mixing_factor[MIXING_STEPPERS]; // Reciprocal of mix proportion. 0.0 = off, otherwise >= 1.0.
#if MIXING_VIRTUAL_TOOLS > 1
float mixing_virtual_tool_mix[MIXING_VIRTUAL_TOOLS][MIXING_STEPPERS];
void mixing_tools_init() {
// Initialize mixing to 100% color 1
for (uint8_t i = 0; i < MIXING_STEPPERS; i++)
mixing_factor[i] = (i == 0) ? 1.0 : 0.0;
for (uint8_t t = 0; t < MIXING_VIRTUAL_TOOLS; t++)
for (uint8_t i = 0; i < MIXING_STEPPERS; i++)
mixing_virtual_tool_mix[t][i] = mixing_factor[i];
}
#endif // MIXING_VIRTUAL_TOOLS > 1
void normalize_mix() {
float mix_total = 0.0;
for (uint8_t i = 0; i < MIXING_STEPPERS; i++) mix_total += RECIPROCAL(mixing_factor[i]);
// Scale all values if they don't add up to ~1.0
if (!NEAR(mix_total, 1.0)) {
SERIAL_PROTOCOLLNPGM("Warning: Mix factors must add up to 1.0. Scaling.");
for (uint8_t i = 0; i < MIXING_STEPPERS; i++) mixing_factor[i] *= mix_total;
}
}
#if ENABLED(DIRECT_MIXING_IN_G1)
// Get mixing parameters from the GCode
// The total "must" be 1.0 (but it will be normalized)
// If no mix factors are given, the old mix is preserved
void gcode_get_mix() {
const char mixing_codes[] = { 'A', 'B', 'C', 'D', 'H', 'I' };
byte mix_bits = 0;
for (uint8_t i = 0; i < MIXING_STEPPERS; i++) {
if (parser.seenval(mixing_codes[i])) {
SBI(mix_bits, i);
float v = parser.value_float();
NOLESS(v, 0.0);
mixing_factor[i] = RECIPROCAL(v);
}
}
// If any mixing factors were included, clear the rest
// If none were included, preserve the last mix
if (mix_bits) {
for (uint8_t i = 0; i < MIXING_STEPPERS; i++)
if (!TEST(mix_bits, i)) mixing_factor[i] = 0.0;
normalize_mix();
}
}
#endif
#endif // MIXING_EXTRUDER