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/**
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* Marlin 3D Printer Firmware
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* Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
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*
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* Based on Sprinter and grbl.
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* Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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/**
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stepper_dac.cpp - To set stepper current via DAC
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Part of Marlin
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Copyright (c) 2016 MarlinFirmware
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Marlin is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Marlin is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Marlin. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "Marlin.h"
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#if ENABLED(DAC_STEPPER_CURRENT)
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#include "stepper_dac.h"
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bool dac_present = false;
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const uint8_t dac_order[NUM_AXIS] = DAC_STEPPER_ORDER;
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uint8_t dac_channel_pct[XYZE] = DAC_MOTOR_CURRENT_DEFAULT;
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int dac_init() {
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#if PIN_EXISTS(DAC_DISABLE)
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OUT_WRITE(DAC_DISABLE_PIN, LOW); // set pin low to enable DAC
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#endif
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mcp4728_init();
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if (mcp4728_simpleCommand(RESET)) return -1;
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dac_present = true;
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mcp4728_setVref_all(DAC_STEPPER_VREF);
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mcp4728_setGain_all(DAC_STEPPER_GAIN);
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if (mcp4728_getDrvPct(0) < 1 || mcp4728_getDrvPct(1) < 1 || mcp4728_getDrvPct(2) < 1 || mcp4728_getDrvPct(3) < 1 ) {
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mcp4728_setDrvPct(dac_channel_pct);
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mcp4728_eepromWrite();
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}
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return 0;
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}
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void dac_current_percent(uint8_t channel, float val) {
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if (!dac_present) return;
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NOMORE(val, 100);
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mcp4728_analogWrite(dac_order[channel], val * 0.01 * (DAC_STEPPER_MAX));
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mcp4728_simpleCommand(UPDATE);
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}
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void dac_current_raw(uint8_t channel, uint16_t val) {
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if (!dac_present) return;
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NOMORE(val, DAC_STEPPER_MAX);
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mcp4728_analogWrite(dac_order[channel], val);
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mcp4728_simpleCommand(UPDATE);
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}
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static float dac_perc(int8_t n) { return 100.0f * mcp4728_getValue(dac_order[n]) * (1.0f / (DAC_STEPPER_MAX)); }
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static float dac_amps(int8_t n) { return mcp4728_getDrvPct(dac_order[n]) * (DAC_STEPPER_MAX) * 0.125 * (1.0f / (DAC_STEPPER_SENSE)); }
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uint8_t dac_current_get_percent(const AxisEnum axis) { return mcp4728_getDrvPct(dac_order[axis]); }
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void dac_current_set_percents(const uint8_t pct[XYZE]) {
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LOOP_XYZE(i) dac_channel_pct[i] = pct[dac_order[i]];
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mcp4728_setDrvPct(dac_channel_pct);
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}
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void dac_print_values() {
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if (!dac_present) return;
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SERIAL_ECHO_START();
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SERIAL_ECHOLNPGM("Stepper current values in % (Amps):");
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SERIAL_ECHO_START();
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SERIAL_ECHOPAIR(" X:", dac_perc(X_AXIS));
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SERIAL_ECHOPAIR(" (", dac_amps(X_AXIS));
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SERIAL_ECHOPAIR(") Y:", dac_perc(Y_AXIS));
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SERIAL_ECHOPAIR(" (", dac_amps(Y_AXIS));
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SERIAL_ECHOPAIR(") Z:", dac_perc(Z_AXIS));
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SERIAL_ECHOPAIR(" (", dac_amps(Z_AXIS));
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SERIAL_ECHOPAIR(") E:", dac_perc(E_AXIS));
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SERIAL_ECHOPAIR(" (", dac_amps(E_AXIS));
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SERIAL_ECHOLNPGM(")");
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}
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void dac_commit_eeprom() {
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if (!dac_present) return;
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mcp4728_eepromWrite();
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}
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#endif // DAC_STEPPER_CURRENT
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