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- /**
- * Marlin 3D Printer Firmware
- * Copyright (c) 2020 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 <https://www.gnu.org/licenses/>.
- *
- */
-
- /**
- * stepper_dac.cpp - To set stepper current via DAC
- */
-
- #include "../../inc/MarlinConfig.h"
-
- #if HAS_MOTOR_CURRENT_DAC
-
- #include "stepper_dac.h"
-
- bool dac_present = false;
- constexpr xyze_uint8_t dac_order = DAC_STEPPER_ORDER;
- xyze_uint_t dac_channel_pct = DAC_MOTOR_CURRENT_DEFAULT;
-
- StepperDAC stepper_dac;
-
- int StepperDAC::init() {
- #if PIN_EXISTS(DAC_DISABLE)
- OUT_WRITE(DAC_DISABLE_PIN, LOW); // set pin low to enable DAC
- #endif
-
- mcp4728.init();
-
- if (mcp4728.simpleCommand(RESET)) return -1;
-
- dac_present = true;
-
- mcp4728.setVref_all(DAC_STEPPER_VREF);
- mcp4728.setGain_all(DAC_STEPPER_GAIN);
-
- if (mcp4728.getDrvPct(0) < 1 || mcp4728.getDrvPct(1) < 1 || mcp4728.getDrvPct(2) < 1 || mcp4728.getDrvPct(3) < 1) {
- mcp4728.setDrvPct(dac_channel_pct);
- mcp4728.eepromWrite();
- }
-
- return 0;
- }
-
- void StepperDAC::set_current_value(const uint8_t channel, uint16_t val) {
- if (!(dac_present && channel < LOGICAL_AXES)) return;
-
- NOMORE(val, uint16_t(DAC_STEPPER_MAX));
-
- mcp4728.analogWrite(dac_order[channel], val);
- mcp4728.simpleCommand(UPDATE);
- }
-
- void StepperDAC::set_current_percent(const uint8_t channel, float val) {
- set_current_value(channel, _MIN(val, 100.0f) * (DAC_STEPPER_MAX) / 100.0f);
- }
-
- static float dac_perc(int8_t n) { return mcp4728.getDrvPct(dac_order[n]); }
- static float dac_amps(int8_t n) { return mcp4728.getValue(dac_order[n]) * 0.125 * RECIPROCAL(DAC_STEPPER_SENSE * 1000); }
-
- uint8_t StepperDAC::get_current_percent(const AxisEnum axis) { return mcp4728.getDrvPct(dac_order[axis]); }
- void StepperDAC::set_current_percents(xyze_uint8_t &pct) {
- LOOP_LOGICAL_AXES(i) dac_channel_pct[i] = pct[dac_order[i]];
- mcp4728.setDrvPct(dac_channel_pct);
- }
-
- void StepperDAC::print_values() {
- if (!dac_present) return;
- SERIAL_ECHO_MSG("Stepper current values in % (Amps):");
- SERIAL_ECHO_START();
- LOOP_LOGICAL_AXES(a) {
- SERIAL_CHAR(' ', IAXIS_CHAR(a), ':');
- SERIAL_ECHO(dac_perc(a));
- SERIAL_ECHOPGM_P(PSTR(" ("), dac_amps(AxisEnum(a)), PSTR(")"));
- }
- #if HAS_EXTRUDERS
- SERIAL_ECHOLNPGM_P(SP_E_LBL, dac_perc(E_AXIS), PSTR(" ("), dac_amps(E_AXIS), PSTR(")"));
- #endif
- }
-
- void StepperDAC::commit_eeprom() {
- if (!dac_present) return;
- mcp4728.eepromWrite();
- }
-
- #endif // HAS_MOTOR_CURRENT_DAC
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