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- /**
- * 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() {
- // Virtual Tools 0, 1, 2, 3 = Filament 1, 2, 3, 4, etc.
- for (uint8_t t = 0; t < MIXING_VIRTUAL_TOOLS && t < MIXING_STEPPERS; t++)
- for (uint8_t i = 0; i < MIXING_STEPPERS; i++)
- mixing_virtual_tool_mix[t][i] = (t == i) ? 1.0 : 0.0;
-
- // Remaining virtual tools are 100% filament 1
- #if MIXING_STEPPERS < MIXING_VIRTUAL_TOOLS
- for (uint8_t t = MIXING_STEPPERS; t < MIXING_VIRTUAL_TOOLS; t++)
- for (uint8_t i = 0; i < MIXING_STEPPERS; i++)
- mixing_virtual_tool_mix[t][i] = (i == 0) ? 1.0 : 0.0;
- #endif
-
- // Initialize mixing to tool 0 color
- for (uint8_t i = 0; i < MIXING_STEPPERS; i++)
- mixing_factor[i] = mixing_virtual_tool_mix[0][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
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