This version of the famous Grbl adds values in the work-coordinate-system (WCS) to the probing command. See x2grbl why you might want this.

probe.c 1.9KB

    /* probe.c - code pertaining to probing methods Part of Grbl v0.9 Copyright (c) 2014 Sungeun K. Jeon Grbl 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. Grbl 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 Grbl. If not, see <http://www.gnu.org/licenses/>. */ #include "system.h" #include "settings.h" #include "probe.h" // Inverts the probe pin state depending on user settings. uint8_t probe_invert_mask; // Probe pin initialization routine. void probe_init() { PROBE_DDR &= ~(PROBE_MASK); // Configure as input pins if (bit_istrue(settings.flags,BITFLAG_INVERT_PROBE_PIN)) { PROBE_PORT &= ~(PROBE_MASK); // Normal low operation. Requires external pull-down. probe_invert_mask = 0; } else { PROBE_PORT |= PROBE_MASK; // Enable internal pull-up resistors. Normal high operation. probe_invert_mask = PROBE_MASK; } } // Returns the probe pin state. Triggered = true. Called by gcode parser and probe state monitor. uint8_t probe_get_state() { return((PROBE_PIN & PROBE_MASK) ^ probe_invert_mask); } // Monitors probe pin state and records the system position when detected. Called by the // stepper ISR per ISR tick. // NOTE: This function must be extremely efficient as to not bog down the stepper ISR. void probe_state_monitor() { if (sys.probe_state == PROBE_ACTIVE) { if (probe_get_state()) { sys.probe_state = PROBE_OFF; memcpy(sys.probe_position, sys.position, sizeof(float)*N_AXIS); bit_true(sys.execute, EXEC_FEED_HOLD); } } }