/** * 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/>. * */ /** stepper_dac.cpp - To set stepper current via DAC Part of Marlin Copyright (c) 2016 MarlinFirmware Marlin 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. Marlin 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 Marlin. If not, see <http://www.gnu.org/licenses/>. */ #include "Marlin.h" #if ENABLED(DAC_STEPPER_CURRENT) #include "stepper_dac.h" bool dac_present = false; const uint8_t dac_order[NUM_AXIS] = DAC_STEPPER_ORDER; uint8_t dac_channel_pct[XYZE] = DAC_MOTOR_CURRENT_DEFAULT; int dac_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 dac_current_percent(uint8_t channel, float val) { if (!dac_present) return; NOMORE(val, 100); mcp4728_analogWrite(dac_order[channel], val * 0.01 * (DAC_STEPPER_MAX)); mcp4728_simpleCommand(UPDATE); } void dac_current_raw(uint8_t channel, uint16_t val) { if (!dac_present) return; NOMORE(val, DAC_STEPPER_MAX); mcp4728_analogWrite(dac_order[channel], val); mcp4728_simpleCommand(UPDATE); } static float dac_perc(int8_t n) { return 100.0 * mcp4728_getValue(dac_order[n]) * (1.0 / (DAC_STEPPER_MAX)); } static float dac_amps(int8_t n) { return mcp4728_getDrvPct(dac_order[n]) * (DAC_STEPPER_MAX) * 0.125 * (1.0 / (DAC_STEPPER_SENSE)); } uint8_t dac_current_get_percent(const AxisEnum axis) { return mcp4728_getDrvPct(dac_order[axis]); } void dac_current_set_percents(const uint8_t pct[XYZE]) { LOOP_XYZE(i) dac_channel_pct[i] = pct[dac_order[i]]; mcp4728_setDrvPct(dac_channel_pct); } void dac_print_values() { if (!dac_present) return; SERIAL_ECHO_START(); SERIAL_ECHOLNPGM("Stepper current values in % (Amps):"); SERIAL_ECHO_START(); SERIAL_ECHOPAIR(" X:", dac_perc(X_AXIS)); SERIAL_ECHOPAIR(" (", dac_amps(X_AXIS)); SERIAL_ECHOPAIR(") Y:", dac_perc(Y_AXIS)); SERIAL_ECHOPAIR(" (", dac_amps(Y_AXIS)); SERIAL_ECHOPAIR(") Z:", dac_perc(Z_AXIS)); SERIAL_ECHOPAIR(" (", dac_amps(Z_AXIS)); SERIAL_ECHOPAIR(") E:", dac_perc(E_AXIS)); SERIAL_ECHOPAIR(" (", dac_amps(E_AXIS)); SERIAL_ECHOLNPGM(")"); } void dac_commit_eeprom() { if (!dac_present) return; mcp4728_eepromWrite(); } #endif // DAC_STEPPER_CURRENT