f41dd69273
- Increased the number of startup blocks to 3 for no good reason other than it doesn't increase the flash size. - Removed the purge buffer command and replaced with an disable homing lock command. - Homing now blocks all g-code commands (not system commands) until the homing cycle has been performed or the disable homing lock is sent. Homing is required upon startup or if Grbl loses it position. This is for safety reasons. - Cleaned up some of the Grbl states and re-organized it to be little more cohesive. - Cleaned up the feedback and status messages to not use so much flash space, as it's a premium now. - Check g-code and dry run switches how are mutually exclusive and can't be enabled when the other is. And automatically resets Grbl when disabled. - Some bug fixes and other minor tweaks.
109 lines
4.6 KiB
C
Executable File
109 lines
4.6 KiB
C
Executable File
/*
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nuts_bolts.h - Header file for shared definitions, variables, and functions
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Part of Grbl
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Copyright (c) 2009-2011 Simen Svale Skogsrud
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Copyright (c) 2011-2012 Sungeun K. Jeon
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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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#ifndef nuts_bolts_h
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#define nuts_bolts_h
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#include <string.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include "config.h"
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#define false 0
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#define true 1
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#define N_AXIS 3 // Number of axes
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#define X_AXIS 0 // Axis indexing value
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#define Y_AXIS 1
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#define Z_AXIS 2
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#define MM_PER_INCH (25.40)
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#define INCH_PER_MM (0.0393701)
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// Useful macros
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#define clear_vector(a) memset(a, 0, sizeof(a))
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#define clear_vector_float(a) memset(a, 0.0, sizeof(float)*N_AXIS)
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#define max(a,b) (((a) > (b)) ? (a) : (b))
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#define min(a,b) (((a) < (b)) ? (a) : (b))
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// Bit field and masking macros
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#define bit(n) (1 << n)
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#define bit_true(x,mask) (x |= mask)
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#define bit_false(x,mask) (x &= ~mask)
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#define bit_toggle(x,mask) (x ^= mask)
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#define bit_istrue(x,mask) ((x & mask) != 0)
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#define bit_isfalse(x,mask) ((x & mask) == 0)
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// Define system executor bit map. Used internally by runtime protocol as runtime command flags,
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// which notifies the main program to execute the specified runtime command asynchronously.
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// NOTE: The system executor uses an unsigned 8-bit volatile variable (8 flag limit.) The default
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// flags are always false, so the runtime protocol only needs to check for a non-zero value to
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// know when there is a runtime command to execute.
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#define EXEC_STATUS_REPORT bit(0) // bitmask 00000001
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#define EXEC_CYCLE_START bit(1) // bitmask 00000010
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#define EXEC_CYCLE_STOP bit(2) // bitmask 00000100
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#define EXEC_FEED_HOLD bit(3) // bitmask 00001000
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#define EXEC_RESET bit(4) // bitmask 00010000
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#define EXEC_ALARM bit(5) // bitmask 00100000
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// #define bit(6) // bitmask 01000000
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// #define bit(7) // bitmask 10000000
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// Define system state bit map. The state variable primarily tracks the individual functions
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// of Grbl to manage each without overlapping. It is also used as a messaging flag for
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// critical events.
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#define STATE_IDLE 0 // Must be zero.
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#define STATE_QUEUED 1 // Indicates buffered blocks, awaiting cycle start.
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#define STATE_CYCLE 2 // Cycle is running
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#define STATE_HOLD 3 // Executing feed hold
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#define STATE_HOMING 4 // Performing homing cycle
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#define STATE_JOG 5 // Jogging mode is unique like homing.
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#define STATE_ALARM 6 // In alarm state. Locks out all g-code processes and messages position lost
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#define STATE_LIMIT 7 // Used to message hard limit triggered.
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// Define global system variables
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typedef struct {
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uint8_t abort; // System abort flag. Forces exit back to main loop for reset.
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uint8_t state; // Tracks the current state of Grbl.
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volatile uint8_t execute; // Global system runtime executor bitflag variable. See EXEC bitmasks.
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int32_t position[3]; // Real-time machine (aka home) position vector in steps.
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// NOTE: This may need to be a volatile variable, if problems arise.
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uint8_t auto_start; // Planner auto-start flag. Toggled off during feed hold. Defaulted by settings.
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// uint8_t feed_hold; // Feed hold flag. Held true during feed hold. Released when ready to resume.
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// volatile uint8_t cycle_start; // Cycle start flag. Set by stepper subsystem or main program.
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} system_t;
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extern system_t sys;
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// Read a floating point value from a string. Line points to the input buffer, char_counter
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// is the indexer pointing to the current character of the line, while float_ptr is
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// a pointer to the result variable. Returns true when it succeeds
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int read_float(char *line, uint8_t *char_counter, float *float_ptr);
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// Delays variable-defined milliseconds. Compiler compatibility fix for _delay_ms().
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void delay_ms(uint16_t ms);
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// Delays variable-defined microseconds. Compiler compatibility fix for _delay_us().
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void delay_us(uint32_t us);
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// Syncs Grbl's gcode and planner position variables with the system position.
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void sys_sync_current_position();
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#endif
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