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88 lines
2.4 KiB
88 lines
2.4 KiB
9 years ago
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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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int dac_init() {
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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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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 * DAC_STEPPER_MAX / 100);
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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 100.0 * mcp4728_getValue(dac_order[n]) / DAC_STEPPER_MAX; }
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static float dac_amps(int8_t n) { return ((2.048 * mcp4728_getValue(dac_order[n])) / 4096.0) / (8.0 * DAC_STEPPER_SENSE); }
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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(0));
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SERIAL_ECHOPAIR(" (", dac_amps(0));
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SERIAL_ECHOPAIR(") Y:", dac_perc(1));
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SERIAL_ECHOPAIR(" (", dac_amps(1));
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SERIAL_ECHOPAIR(") Z:", dac_perc(2));
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SERIAL_ECHOPAIR(" (", dac_amps(2));
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SERIAL_ECHOPAIR(") E:", dac_perc(3));
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SERIAL_ECHOPAIR(" (", dac_amps(3));
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SERIAL_ECHOLN(")");
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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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