ManuelW/grbl-LPC-CoreXY
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Minor bug fixes.

Browse Source 
- G38.x was not printing correctly in the $G g-code state reports. Now
fixed.

- Potential bug regarding volatile variables inside a struct. It has
never been a problem in v0.9, but ran into this during v1.0
development. Just to be safe, the fixes are applied here.

- Updated pre-built firmwares with these two bug fixes.
This commit is contained in:
Sonny Jeon 2015-09-30 20:53:35 -06:00
parent 90ad129ad2
commit d226555810
14 changed files with 78 additions and 64 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
README.md
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@ -27,8 +27,8 @@ Grbl includes full acceleration management with look ahead. That means the contr
***
_**Master Branch:**_
* [Grbl v0.9j Atmega328p 16mhz 115200baud with generic defaults](http://bit.ly/1I8Ey4S) _(2015-07-17)_
* [Grbl v0.9j Atmega328p 16mhz 115200baud with ShapeOko2 defaults](http://bit.ly/1OjUSia) _(2015-07-17)_
* [Grbl v0.9j Atmega328p 16mhz 115200baud with generic defaults](http://bit.ly/1I8Ey4S) _(2015-09-30)_
* [Grbl v0.9j Atmega328p 16mhz 115200baud with ShapeOko2 defaults](http://bit.ly/1OjUSia) _(2015-09-30)_
- **IMPORTANT INFO WHEN UPGRADING TO GRBL v0.9 :**
- Baudrate is now **115200** (Up from 9600).
- Homing cycle updated. Located based on switch trigger, rather than release point.

14
doc/log/commit_log_v0.9i.txt
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@ -1,3 +1,17 @@
----------------
Date: 2015-08-16
Author: Sonny Jeon
Subject: Update README.md
----------------
Date: 2015-08-14
Author: Sonny Jeon
Subject: Individual control pin invert compile-option.
- Control pins may be individually inverted through a
CONTROL_INVERT_MASK macro. This mask is define in the cpu_map.h file.
----------------
Date: 2015-07-17
Author: Sonny Jeon

2
grbl/gcode.c
View File

@ -1037,7 +1037,7 @@ uint8_t gc_execute_line(char *line)
protocol_buffer_synchronize(); // Sync and finish all remaining buffered motions before moving on.
if (gc_state.modal.program_flow == PROGRAM_FLOW_PAUSED) {
if (sys.state != STATE_CHECK_MODE) {
bit_true_atomic(sys.rt_exec_state, EXEC_FEED_HOLD); // Use feed hold for program pause.
bit_true_atomic(sys_rt_exec_state, EXEC_FEED_HOLD); // Use feed hold for program pause.
protocol_execute_realtime(); // Execute suspend.
}
} else { // == PROGRAM_FLOW_COMPLETED

2
grbl/grbl.h
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@ -23,7 +23,7 @@
// Grbl versioning system
#define GRBL_VERSION "0.9j"
#define GRBL_VERSION_BUILD "20150811"
#define GRBL_VERSION_BUILD "20150930"
// Define standard libraries used by Grbl.
#include <avr/io.h>

22
grbl/limits.c
View File

@ -101,16 +101,16 @@ uint8_t limits_get_state()
// locked out until a homing cycle or a kill lock command. Allows the user to disable the hard
// limit setting if their limits are constantly triggering after a reset and move their axes.
if (sys.state != STATE_ALARM) {
if (!(sys.rt_exec_alarm)) {
if (!(sys_rt_exec_alarm)) {
#ifdef HARD_LIMIT_FORCE_STATE_CHECK
// Check limit pin state.
if (limits_get_state()) {
mc_reset(); // Initiate system kill.
bit_true_atomic(sys.rt_exec_alarm, (EXEC_ALARM_HARD_LIMIT|EXEC_CRITICAL_EVENT)); // Indicate hard limit critical event
bit_true_atomic(sys_rt_exec_alarm, (EXEC_ALARM_HARD_LIMIT|EXEC_CRITICAL_EVENT)); // Indicate hard limit critical event
}
#else
mc_reset(); // Initiate system kill.
bit_true_atomic(sys.rt_exec_alarm, (EXEC_ALARM_HARD_LIMIT|EXEC_CRITICAL_EVENT)); // Indicate hard limit critical event
bit_true_atomic(sys_rt_exec_alarm, (EXEC_ALARM_HARD_LIMIT|EXEC_CRITICAL_EVENT)); // Indicate hard limit critical event
#endif
}
}
@ -122,11 +122,11 @@ uint8_t limits_get_state()
{
WDTCSR &= ~(1<<WDIE); // Disable watchdog timer.
if (sys.state != STATE_ALARM) { // Ignore if already in alarm state.
if (!(sys.rt_exec_alarm)) {
if (!(sys_rt_exec_alarm)) {
// Check limit pin state.
if (limits_get_state()) {
mc_reset(); // Initiate system kill.
bit_true_atomic(sys.rt_exec_alarm, (EXEC_ALARM_HARD_LIMIT|EXEC_CRITICAL_EVENT)); // Indicate hard limit critical event
bit_true_atomic(sys_rt_exec_alarm, (EXEC_ALARM_HARD_LIMIT|EXEC_CRITICAL_EVENT)); // Indicate hard limit critical event
}
}
}
@ -225,17 +225,17 @@ void limits_go_home(uint8_t cycle_mask)
st_prep_buffer(); // Check and prep segment buffer. NOTE: Should take no longer than 200us.
// Exit routines: No time to run protocol_execute_realtime() in this loop.
if (sys.rt_exec_state & (EXEC_SAFETY_DOOR | EXEC_RESET | EXEC_CYCLE_STOP)) {
if (sys_rt_exec_state & (EXEC_SAFETY_DOOR | EXEC_RESET | EXEC_CYCLE_STOP)) {
// Homing failure: Limit switches are still engaged after pull-off motion
if ( (sys.rt_exec_state & (EXEC_SAFETY_DOOR | EXEC_RESET)) || // Safety door or reset issued
if ( (sys_rt_exec_state & (EXEC_SAFETY_DOOR | EXEC_RESET)) || // Safety door or reset issued
(!approach && (limits_get_state() & cycle_mask)) || // Limit switch still engaged after pull-off motion
( approach && (sys.rt_exec_state & EXEC_CYCLE_STOP)) ) { // Limit switch not found during approach.
( approach && (sys_rt_exec_state & EXEC_CYCLE_STOP)) ) { // Limit switch not found during approach.
mc_reset(); // Stop motors, if they are running.
protocol_execute_realtime();
return;
} else {
// Pull-off motion complete. Disable CYCLE_STOP from executing.
bit_false_atomic(sys.rt_exec_state,EXEC_CYCLE_STOP);
bit_false_atomic(sys_rt_exec_state,EXEC_CYCLE_STOP);
break;
}
}
@ -335,7 +335,7 @@ void limits_soft_check(float *target)
// workspace volume so just come to a controlled stop so position is not lost. When complete
// enter alarm mode.
if (sys.state == STATE_CYCLE) {
bit_true_atomic(sys.rt_exec_state, EXEC_FEED_HOLD);
bit_true_atomic(sys_rt_exec_state, EXEC_FEED_HOLD);
do {
protocol_execute_realtime();
if (sys.abort) { return; }
@ -343,7 +343,7 @@ void limits_soft_check(float *target)
}
mc_reset(); // Issue system reset and ensure spindle and coolant are shutdown.
bit_true_atomic(sys.rt_exec_alarm, (EXEC_ALARM_SOFT_LIMIT|EXEC_CRITICAL_EVENT)); // Indicate soft limit critical event
bit_true_atomic(sys_rt_exec_alarm, (EXEC_ALARM_SOFT_LIMIT|EXEC_CRITICAL_EVENT)); // Indicate soft limit critical event
protocol_execute_realtime(); // Execute to enter critical event loop and system abort
return;
}

4
grbl/main.c
View File

@ -77,8 +77,8 @@ int main(void)
// Reset system variables.
sys.abort = false;
sys.rt_exec_state = 0;
sys.rt_exec_alarm = 0;
sys_rt_exec_state = 0;
sys_rt_exec_alarm = 0;
sys.suspend = false;
// Start Grbl main loop. Processes program inputs and executes them.

22
grbl/motion_control.c
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@ -227,7 +227,7 @@ void mc_homing_cycle()
#ifdef LIMITS_TWO_SWITCHES_ON_AXES
if (limits_get_state()) {
mc_reset(); // Issue system reset and ensure spindle and coolant are shutdown.
bit_true_atomic(sys.rt_exec_alarm, (EXEC_ALARM_HARD_LIMIT|EXEC_CRITICAL_EVENT));
bit_true_atomic(sys_rt_exec_alarm, (EXEC_ALARM_HARD_LIMIT|EXEC_CRITICAL_EVENT));
return;
}
#endif
@ -283,7 +283,7 @@ void mc_homing_cycle()
// After syncing, check if probe is already triggered. If so, halt and issue alarm.
// NOTE: This probe initialization error applies to all probing cycles.
if ( probe_get_state() ) { // Check probe pin state.
bit_true_atomic(sys.rt_exec_alarm, EXEC_ALARM_PROBE_FAIL);
bit_true_atomic(sys_rt_exec_alarm, EXEC_ALARM_PROBE_FAIL);
protocol_execute_realtime();
}
if (sys.abort) { return; } // Return if system reset has been issued.
@ -296,10 +296,10 @@ void mc_homing_cycle()
#endif
// Activate the probing state monitor in the stepper module.
sys.probe_state = PROBE_ACTIVE;
sys_probe_state = PROBE_ACTIVE;
// Perform probing cycle. Wait here until probe is triggered or motion completes.
bit_true_atomic(sys.rt_exec_state, EXEC_CYCLE_START);
bit_true_atomic(sys_rt_exec_state, EXEC_CYCLE_START);
do {
protocol_execute_realtime();
if (sys.abort) { return; } // Check for system abort
@ -308,13 +308,13 @@ void mc_homing_cycle()
// Probing cycle complete!
// Set state variables and error out, if the probe failed and cycle with error is enabled.
if (sys.probe_state == PROBE_ACTIVE) {
if (sys_probe_state == PROBE_ACTIVE) {
if (is_no_error) { memcpy(sys.probe_position, sys.position, sizeof(float)*N_AXIS); }
else { bit_true_atomic(sys.rt_exec_alarm, EXEC_ALARM_PROBE_FAIL); }
else { bit_true_atomic(sys_rt_exec_alarm, EXEC_ALARM_PROBE_FAIL); }
} else {
sys.probe_succeeded = true; // Indicate to system the probing cycle completed successfully.
}
sys.probe_state = PROBE_OFF; // Ensure probe state monitor is disabled.
sys_probe_state = PROBE_OFF; // Ensure probe state monitor is disabled.
protocol_execute_realtime(); // Check and execute run-time commands
if (sys.abort) { return; } // Check for system abort
@ -342,8 +342,8 @@ void mc_homing_cycle()
void mc_reset()
{
// Only this function can set the system reset. Helps prevent multiple kill calls.
if (bit_isfalse(sys.rt_exec_state, EXEC_RESET)) {
bit_true_atomic(sys.rt_exec_state, EXEC_RESET);
if (bit_isfalse(sys_rt_exec_state, EXEC_RESET)) {
bit_true_atomic(sys_rt_exec_state, EXEC_RESET);
// Kill spindle and coolant.
spindle_stop();
@ -354,8 +354,8 @@ void mc_reset()
// the steppers enabled by avoiding the go_idle call altogether, unless the motion state is
// violated, by which, all bets are off.
if ((sys.state & (STATE_CYCLE | STATE_HOMING)) || (sys.suspend == SUSPEND_ENABLE_HOLD)) {
if (sys.state == STATE_HOMING) { bit_true_atomic(sys.rt_exec_alarm, EXEC_ALARM_HOMING_FAIL); }
else { bit_true_atomic(sys.rt_exec_alarm, EXEC_ALARM_ABORT_CYCLE); }
if (sys.state == STATE_HOMING) { bit_true_atomic(sys_rt_exec_alarm, EXEC_ALARM_HOMING_FAIL); }
else { bit_true_atomic(sys_rt_exec_alarm, EXEC_ALARM_ABORT_CYCLE); }
st_go_idle(); // Force kill steppers. Position has likely been lost.
}
}

6
grbl/probe.c
View File

@ -58,11 +58,11 @@ uint8_t probe_get_state() { return((PROBE_PIN & PROBE_MASK) ^ probe_invert_mask)
// 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 (sys_probe_state == PROBE_ACTIVE) {
if (probe_get_state()) {
sys.probe_state = PROBE_OFF;
sys_probe_state = PROBE_OFF;
memcpy(sys.probe_position, sys.position, sizeof(float)*N_AXIS);
bit_true(sys.rt_exec_state, EXEC_MOTION_CANCEL);
bit_true(sys_rt_exec_state, EXEC_MOTION_CANCEL);
}
}
}

28
grbl/protocol.c
View File

@ -79,7 +79,7 @@ void protocol_main_loop()
} else {
// All systems go! But first check for safety door.
if (system_check_safety_door_ajar()) {
bit_true(sys.rt_exec_state, EXEC_SAFETY_DOOR);
bit_true(sys_rt_exec_state, EXEC_SAFETY_DOOR);
protocol_execute_realtime(); // Enter safety door mode. Should return as IDLE state.
} else {
sys.state = STATE_IDLE; // Set system to ready. Clear all state flags.
@ -180,7 +180,7 @@ void protocol_main_loop()
// define more computationally-expensive volatile variables. This also provides a controlled way to
// execute certain tasks without having two or more instances of the same task, such as the planner
// recalculating the buffer upon a feedhold or override.
// NOTE: The sys.rt_exec_state variable flags are set by any process, step or serial interrupts, pinouts,
// NOTE: The sys_rt_exec_state variable flags are set by any process, step or serial interrupts, pinouts,
// limit switches, or the main program.
void protocol_execute_realtime()
{
@ -189,7 +189,7 @@ void protocol_execute_realtime()
do { // If system is suspended, suspend loop restarts here.
// Check and execute alarms.
rt_exec = sys.rt_exec_alarm; // Copy volatile sys.rt_exec_alarm.
rt_exec = sys_rt_exec_alarm; // Copy volatile sys_rt_exec_alarm.
if (rt_exec) { // Enter only if any bit flag is true
// System alarm. Everything has shutdown by something that has gone severely wrong. Report
// the source of the error to the user. If critical, Grbl disables by entering an infinite
@ -209,7 +209,7 @@ void protocol_execute_realtime()
// Halt everything upon a critical event flag. Currently hard and soft limits flag this.
if (rt_exec & EXEC_CRITICAL_EVENT) {
report_feedback_message(MESSAGE_CRITICAL_EVENT);
bit_false_atomic(sys.rt_exec_state,EXEC_RESET); // Disable any existing reset
bit_false_atomic(sys_rt_exec_state,EXEC_RESET); // Disable any existing reset
do {
// Nothing. Block EVERYTHING until user issues reset or power cycles. Hard limits
// typically occur while unattended or not paying attention. Gives the user time
@ -218,17 +218,17 @@ void protocol_execute_realtime()
// stream could be still engaged and cause a serious crash if it continues afterwards.
// TODO: Allow status reports during a critical alarm. Still need to think about implications of this.
// if (sys.rt_exec_state & EXEC_STATUS_REPORT) {
// if (sys_rt_exec_state & EXEC_STATUS_REPORT) {
// report_realtime_status();
// bit_false_atomic(sys.rt_exec_state,EXEC_STATUS_REPORT);
// bit_false_atomic(sys_rt_exec_state,EXEC_STATUS_REPORT);
// }
} while (bit_isfalse(sys.rt_exec_state,EXEC_RESET));
} while (bit_isfalse(sys_rt_exec_state,EXEC_RESET));
}
bit_false_atomic(sys.rt_exec_alarm,0xFF); // Clear all alarm flags
bit_false_atomic(sys_rt_exec_alarm,0xFF); // Clear all alarm flags
}
// Check amd execute realtime commands
rt_exec = sys.rt_exec_state; // Copy volatile sys.rt_exec_state.
rt_exec = sys_rt_exec_state; // Copy volatile sys_rt_exec_state.
if (rt_exec) { // Enter only if any bit flag is true
// Execute system abort.
@ -240,7 +240,7 @@ void protocol_execute_realtime()
// Execute and serial print status
if (rt_exec & EXEC_STATUS_REPORT) {
report_realtime_status();
bit_false_atomic(sys.rt_exec_state,EXEC_STATUS_REPORT);
bit_false_atomic(sys_rt_exec_state,EXEC_STATUS_REPORT);
}
// Execute hold states.
@ -291,7 +291,7 @@ void protocol_execute_realtime()
}
}
bit_false_atomic(sys.rt_exec_state,(EXEC_MOTION_CANCEL | EXEC_FEED_HOLD | EXEC_SAFETY_DOOR));
bit_false_atomic(sys_rt_exec_state,(EXEC_MOTION_CANCEL | EXEC_FEED_HOLD | EXEC_SAFETY_DOOR));
}
// Execute a cycle start by starting the stepper interrupt to begin executing the blocks in queue.
@ -326,7 +326,7 @@ void protocol_execute_realtime()
sys.suspend = SUSPEND_DISABLE; // Break suspend state.
}
}
bit_false_atomic(sys.rt_exec_state,EXEC_CYCLE_START);
bit_false_atomic(sys_rt_exec_state,EXEC_CYCLE_START);
}
// Reinitializes the cycle plan and stepper system after a feed hold for a resume. Called by
@ -348,7 +348,7 @@ void protocol_execute_realtime()
sys.suspend = SUSPEND_DISABLE;
sys.state = STATE_IDLE;
}
bit_false_atomic(sys.rt_exec_state,EXEC_CYCLE_STOP);
bit_false_atomic(sys_rt_exec_state,EXEC_CYCLE_STOP);
}
}
@ -398,4 +398,4 @@ void protocol_buffer_synchronize()
// when one of these conditions exist respectively: There are no more blocks sent (i.e. streaming
// is finished, single commands), a command that needs to wait for the motions in the buffer to
// execute calls a buffer sync, or the planner buffer is full and ready to go.
void protocol_auto_cycle_start() { bit_true_atomic(sys.rt_exec_state, EXEC_CYCLE_START); }
void protocol_auto_cycle_start() { bit_true_atomic(sys_rt_exec_state, EXEC_CYCLE_START); }

2
grbl/report.c
View File

@ -331,7 +331,7 @@ void report_gcode_modes()
case MOTION_MODE_NONE : printPgmString(PSTR("G80")); break;
default:
printPgmString(PSTR("G38."));
print_uint8_base10(gc_state.modal.motion - (MOTION_MODE_PROBE_TOWARD+2));
print_uint8_base10(gc_state.modal.motion - (MOTION_MODE_PROBE_TOWARD-2));
}
printPgmString(PSTR(" G"));

10
grbl/serial.c
View File

@ -89,7 +89,7 @@ void serial_write(uint8_t data) {
// Wait until there is space in the buffer
while (next_head == serial_tx_buffer_tail) {
// TODO: Restructure st_prep_buffer() calls to be executed here during a long print.
if (sys.rt_exec_state & EXEC_RESET) { return; } // Only check for abort to avoid an endless loop.
if (sys_rt_exec_state & EXEC_RESET) { return; } // Only check for abort to avoid an endless loop.
}
// Store data and advance head
@ -164,10 +164,10 @@ ISR(SERIAL_RX)
// Pick off realtime command characters directly from the serial stream. These characters are
// not passed into the buffer, but these set system state flag bits for realtime execution.
switch (data) {
case CMD_STATUS_REPORT: bit_true_atomic(sys.rt_exec_state, EXEC_STATUS_REPORT); break; // Set as true
case CMD_CYCLE_START: bit_true_atomic(sys.rt_exec_state, EXEC_CYCLE_START); break; // Set as true
case CMD_FEED_HOLD: bit_true_atomic(sys.rt_exec_state, EXEC_FEED_HOLD); break; // Set as true
case CMD_SAFETY_DOOR: bit_true_atomic(sys.rt_exec_state, EXEC_SAFETY_DOOR); break; // Set as true
case CMD_STATUS_REPORT: bit_true_atomic(sys_rt_exec_state, EXEC_STATUS_REPORT); break; // Set as true
case CMD_CYCLE_START: bit_true_atomic(sys_rt_exec_state, EXEC_CYCLE_START); break; // Set as true
case CMD_FEED_HOLD: bit_true_atomic(sys_rt_exec_state, EXEC_FEED_HOLD); break; // Set as true
case CMD_SAFETY_DOOR: bit_true_atomic(sys_rt_exec_state, EXEC_SAFETY_DOOR); break; // Set as true
case CMD_RESET: mc_reset(); break; // Call motion control reset routine.
default: // Write character to buffer
next_head = serial_rx_buffer_head + 1;

4
grbl/stepper.c
View File

@ -218,7 +218,7 @@ void st_go_idle()
// Set stepper driver idle state, disabled or enabled, depending on settings and circumstances.
bool pin_state = false; // Keep enabled.
if (((settings.stepper_idle_lock_time != 0xff) || sys.rt_exec_alarm) && sys.state != STATE_HOMING) {
if (((settings.stepper_idle_lock_time != 0xff) || sys_rt_exec_alarm) && sys.state != STATE_HOMING) {
// Force stepper dwell to lock axes for a defined amount of time to ensure the axes come to a complete
// stop and not drift from residual inertial forces at the end of the last movement.
delay_ms(settings.stepper_idle_lock_time);
@ -338,7 +338,7 @@ ISR(TIMER1_COMPA_vect)
} else {
// Segment buffer empty. Shutdown.
st_go_idle();
bit_true_atomic(sys.rt_exec_state,EXEC_CYCLE_STOP); // Flag main program for cycle end
bit_true_atomic(sys_rt_exec_state,EXEC_CYCLE_STOP); // Flag main program for cycle end
return; // Nothing to do but exit.
}
}

10
grbl/system.c
View File

@ -49,13 +49,13 @@ ISR(CONTROL_INT_vect)
if (bit_istrue(pin,bit(RESET_BIT))) {
mc_reset();
} else if (bit_istrue(pin,bit(CYCLE_START_BIT))) {
bit_true(sys.rt_exec_state, EXEC_CYCLE_START);
bit_true(sys_rt_exec_state, EXEC_CYCLE_START);
#ifndef ENABLE_SAFETY_DOOR_INPUT_PIN
} else if (bit_istrue(pin,bit(FEED_HOLD_BIT))) {
bit_true(sys.rt_exec_state, EXEC_FEED_HOLD);
bit_true(sys_rt_exec_state, EXEC_FEED_HOLD);
#else
} else if (bit_istrue(pin,bit(SAFETY_DOOR_BIT))) {
bit_true(sys.rt_exec_state, EXEC_SAFETY_DOOR);
bit_true(sys_rt_exec_state, EXEC_SAFETY_DOOR);
#endif
}
}
@ -139,7 +139,7 @@ uint8_t system_execute_line(char *line)
sys.state = STATE_IDLE;
// Don't run startup script. Prevents stored moves in startup from causing accidents.
if (system_check_safety_door_ajar()) { // Check safety door switch before returning.
bit_true(sys.rt_exec_state, EXEC_SAFETY_DOOR);
bit_true(sys_rt_exec_state, EXEC_SAFETY_DOOR);
protocol_execute_realtime(); // Enter safety door mode.
}
} // Otherwise, no effect.
@ -175,7 +175,7 @@ uint8_t system_execute_line(char *line)
// TODO: Likely not required.
if (system_check_safety_door_ajar()) { // Check safety door switch before homing.
bit_true(sys.rt_exec_state, EXEC_SAFETY_DOOR);
bit_true(sys_rt_exec_state, EXEC_SAFETY_DOOR);
protocol_execute_realtime(); // Enter safety door mode.
}

12
grbl/system.h
View File

@ -72,20 +72,20 @@ typedef struct {
uint8_t abort; // System abort flag. Forces exit back to main loop for reset.
uint8_t state; // Tracks the current state of Grbl.
uint8_t suspend; // System suspend bitflag variable that manages holds, cancels, and safety door.
volatile uint8_t rt_exec_state; // Global realtime executor bitflag variable for state management. See EXEC bitmasks.
volatile uint8_t rt_exec_alarm; // Global realtime executor bitflag variable for setting various alarms.
int32_t position[N_AXIS]; // Real-time machine (aka home) position vector in steps.
// NOTE: This may need to be a volatile variable, if problems arise.
uint8_t homing_axis_lock; // Locks axes when limits engage. Used as an axis motion mask in the stepper ISR.
volatile uint8_t probe_state; // Probing state value. Used to coordinate the probing cycle with stepper ISR.
int32_t probe_position[N_AXIS]; // Last probe position in machine coordinates and steps.
uint8_t probe_succeeded; // Tracks if last probing cycle was successful.
uint8_t homing_axis_lock; // Locks axes when limits engage. Used as an axis motion mask in the stepper ISR.
} system_t;
extern system_t sys;
volatile uint8_t sys_probe_state; // Probing state value. Used to coordinate the probing cycle with stepper ISR.
volatile uint8_t sys_rt_exec_state; // Global realtime executor bitflag variable for state management. See EXEC bitmasks.
volatile uint8_t sys_rt_exec_alarm; // Global realtime executor bitflag variable for setting various alarms.
// Initialize the serial protocol
void system_init();