c7db1c4546
- New configuration option at compile-time: - Force alarm upon power-up or hard reset. When homing is enabled, this is already the default behavior. This simply forces this all of the time. - GUI reporting mode. Removes most human-readable strings that GUIs don’t need. This saves nearly 2KB in flash space that can be used for other features. - Hard limit force state check: In the hard limit pin change ISR, Grbl by default sets the hard limit alarm upon any pin change to guarantee the alarm is set. If this option is set, it’ll check the state within the ISR, but can’t guarantee the pin will be read correctly if the switch is bouncing. This option makes hard limit behavior a little less annoying if you have a good buffered switch circuit that removes bouncing and electronic noise. - Software debounce bug fix. It was reading the pin incorrectly for the setting. - Re-factored some of the ‘$’ settings code.
90 lines
3.2 KiB
C
90 lines
3.2 KiB
C
/*
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main.c - An embedded CNC Controller with rs274/ngc (g-code) support
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Part of Grbl
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Copyright (c) 2011-2015 Sungeun K. Jeon
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Copyright (c) 2009-2011 Simen Svale Skogsrud
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Grbl 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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Grbl 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 Grbl. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "grbl.h"
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// Declare system global variable structure
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system_t sys;
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int main(void)
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{
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// Initialize system upon power-up.
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serial_init(); // Setup serial baud rate and interrupts
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settings_init(); // Load Grbl settings from EEPROM
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stepper_init(); // Configure stepper pins and interrupt timers
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system_init(); // Configure pinout pins and pin-change interrupt
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memset(&sys, 0, sizeof(sys)); // Clear all system variables
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sys.abort = true; // Set abort to complete initialization
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sei(); // Enable interrupts
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// Check for power-up and set system alarm if homing is enabled to force homing cycle
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// by setting Grbl's alarm state. Alarm locks out all g-code commands, including the
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// startup scripts, but allows access to settings and internal commands. Only a homing
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// cycle '$H' or kill alarm locks '$X' will disable the alarm.
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// NOTE: The startup script will run after successful completion of the homing cycle, but
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// not after disabling the alarm locks. Prevents motion startup blocks from crashing into
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// things uncontrollably. Very bad.
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#ifdef HOMING_INIT_LOCK
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if (bit_istrue(settings.flags,BITFLAG_HOMING_ENABLE)) { sys.state = STATE_ALARM; }
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#endif
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// Force Grbl into an ALARM state upon a power-cycle or hard reset.
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#ifdef FORCE_INITIALIZATION_ALARM
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sys.state = STATE_ALARM;
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#endif
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// Grbl initialization loop upon power-up or a system abort. For the latter, all processes
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// will return to this loop to be cleanly re-initialized.
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for(;;) {
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// TODO: Separate configure task that require interrupts to be disabled, especially upon
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// a system abort and ensuring any active interrupts are cleanly reset.
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// Reset Grbl primary systems.
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serial_reset_read_buffer(); // Clear serial read buffer
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gc_init(); // Set g-code parser to default state
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spindle_init();
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coolant_init();
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limits_init();
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probe_init();
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plan_reset(); // Clear block buffer and planner variables
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st_reset(); // Clear stepper subsystem variables.
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// Sync cleared gcode and planner positions to current system position.
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plan_sync_position();
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gc_sync_position();
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// Reset system variables.
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sys.abort = false;
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sys.rt_exec_state = 0;
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sys.rt_exec_alarm = 0;
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sys.suspend = false;
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// Start Grbl main loop. Processes program inputs and executes them.
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protocol_main_loop();
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}
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return 0; /* Never reached */
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}
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