// Executes run-time commands, when required. This is called from various check points in the main
// program, primarily where there may be a while loop waiting for a buffer to clear space or any
// point where the execution time from the last check point may be more than a fraction of a second.
// This is a way to execute runtime commands asynchronously (aka multitasking) with grbl's g-code
// parsing and planning functions. This function also serves as an interface for the interrupts to
// set the system runtime flags, where only the main program to handles them, removing the need to
// define more computationally-expensive volatile variables.
// NOTE: The sys.execute variable flags are set by the serial read subprogram, except where noted.
void protocol_execute_runtime()
{
// evaluate emergency stop -cm
if (!(AUX_PIN & (1<<AUX_STOP_BIT)))
{
if (!(sys.execute & EXEC_RESET)) { // Force stop only first time.
st_go_idle();
spindle_stop();
sys.execute |= EXEC_RESET; // Set as true
}
}
if (sys.execute) { // Enter only if any bit flag is true
uint8_t rt_exec = sys.execute; // Avoid calling volatile multiple times
// System abort. Steppers have already been force stopped.
if (rt_exec & EXEC_RESET) {
sys.abort = true;
return; // Nothing else to do but exit.
}
// Execute and serial print status
if (rt_exec & EXEC_STATUS_REPORT) {
protocol_status_report();
bit_false(sys.execute,EXEC_STATUS_REPORT);
}
// Execute and serial print switches
if (rt_exec & EXEC_SWITCH_REPORT) {
protocol_switch_report();
bit_false(sys.execute,EXEC_SWITCH_REPORT);
}
// Initiate stepper feed hold
if (rt_exec & EXEC_FEED_HOLD) {
st_feed_hold(); // Initiate feed hold.
bit_false(sys.execute,EXEC_FEED_HOLD);
}
// Reinitializes the stepper module running flags and re-plans the buffer after a feed hold.
// NOTE: EXEC_CYCLE_STOP is set by the stepper subsystem when a cycle or feed hold completes.
if (rt_exec & EXEC_CYCLE_STOP) {
st_cycle_reinitialize();
bit_false(sys.execute,EXEC_CYCLE_STOP);
}
if (rt_exec & EXEC_CYCLE_START) {
st_cycle_start(); // Issue cycle start command to stepper subsystem
#ifdef CYCLE_AUTO_START
sys.auto_start = true; // Re-enable auto start after feed hold.
#endif
bit_false(sys.execute,EXEC_CYCLE_START);
}
}
}
// Executes run-time commands, when required. This is called from various check points in the main
// program, primarily where there may be a while loop waiting for a buffer to clear space or any
// point where the execution time from the last check point may be more than a fraction of a second.
// This is a way to execute runtime commands asynchronously (aka multitasking) with grbl's g-code
// parsing and planning functions. This function also serves as an interface for the interrupts to
// set the system runtime flags, where only the main program handles them, removing the need to
// 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.execute variable flags are set by any process, step or serial interrupts, pinouts,
// limit switches, or the main program.
void protocol_execute_runtime()
{
if (sys.execute) { // Enter only if any bit flag is true
uint8_t rt_exec = sys.execute; // Avoid calling volatile multiple times
// 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
// loop until system reset/abort.
if (rt_exec & (EXEC_ALARM | EXEC_CRIT_EVENT)) {
sys.state = STATE_ALARM; // Set system alarm state
// Critical event. Only hard limit qualifies. Update this as new critical events surface.
if (rt_exec & EXEC_CRIT_EVENT) {
report_alarm_message(ALARM_HARD_LIMIT);
report_feedback_message(MESSAGE_CRITICAL_EVENT);
bit_false(sys.execute,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
// to do what is needed before resetting, like killing the incoming stream.
} while (bit_isfalse(sys.execute,EXEC_RESET));
// Standard alarm event. Only abort during motion qualifies.
} else {
// Runtime abort command issued during a cycle, feed hold, or homing cycle. Message the
// user that position may have been lost and set alarm state to enable the alarm lockout
// to indicate the possible severity of the problem.
report_alarm_message(ALARM_ABORT_CYCLE);
}
bit_false(sys.execute,(EXEC_ALARM | EXEC_CRIT_EVENT));
}
// Execute system abort.
if (rt_exec & EXEC_RESET) {
sys.abort = true; // Only place this is set true.
return; // Nothing else to do but exit.
}
// Execute and serial print status
if (rt_exec & EXEC_STATUS_REPORT) {
report_realtime_status();
bit_false(sys.execute,EXEC_STATUS_REPORT);
}
// Initiate stepper feed hold
if (rt_exec & EXEC_FEED_HOLD) {
st_feed_hold(); // Initiate feed hold.
bit_false(sys.execute,EXEC_FEED_HOLD);
}
// Reinitializes the stepper module running state and, if a feed hold, re-plans the buffer.
// NOTE: EXEC_CYCLE_STOP is set by the stepper subsystem when a cycle or feed hold completes.
if (rt_exec & EXEC_CYCLE_STOP) {
st_cycle_reinitialize();
bit_false(sys.execute,EXEC_CYCLE_STOP);
}
if (rt_exec & EXEC_CYCLE_START) {
st_cycle_start(); // Issue cycle start command to stepper subsystem
if (bit_istrue(settings.flags,BITFLAG_AUTO_START)) {
sys.auto_start = true; // Re-enable auto start after feed hold.
}
bit_false(sys.execute,EXEC_CYCLE_START);
}
}
// Overrides flag byte (sys.override) and execution should be installed here, since they
// are runtime and require a direct and controlled interface to the main stepper program.
}
void protocol_execute_runtime()
{
uint8_t aux_bits;
aux_bits = AUX_PIN ^ AUX_INVMASK; // apply invert mask
if (!(aux_bits & (1<<AUX_STOP_BIT)))
{
if (!(emerg_stop)) {
st_go_idle();
spindle_stop();
sys.abort = true;
emerg_stop = true;
}
}
else {
emerg_stop = false;
}
AUX_PORT ^= (1<<AUX_WDOG_BIT); // Chargepump-Bit invertieren
if (sys.execute) { // Enter only if any bit flag is true
uint8_t rt_exec = sys.execute; // Avoid calling volatile multiple times
// System abort. Steppers have already been force stopped.
if (rt_exec & EXEC_RESET) {
sys.abort = true;
return; // Nothing else to do but exit.
}
// Execute and serial print status
if (rt_exec & EXEC_STATUS_REPORT) {
protocol_status_report();
bit_false(sys.execute,EXEC_STATUS_REPORT);
}
// Execute and serial print switches
if (rt_exec & EXEC_SWITCH_REPORT) {
protocol_switch_report();
bit_false(sys.execute,EXEC_SWITCH_REPORT);
}
// Initiate stepper feed hold
if (rt_exec & EXEC_FEED_HOLD) {
st_feed_hold(); // Initiate feed hold.
bit_false(sys.execute,EXEC_FEED_HOLD);
}
// Reinitializes the stepper module running flags and re-plans the buffer after a feed hold.
// NOTE: EXEC_CYCLE_STOP is set by the stepper subsystem when a cycle or feed hold completes.
if (rt_exec & EXEC_CYCLE_STOP) {
st_cycle_reinitialize();
bit_false(sys.execute,EXEC_CYCLE_STOP);
}
if (rt_exec & EXEC_CYCLE_START) {
st_cycle_start(); // Issue cycle start command to stepper subsystem
#ifdef CYCLE_AUTO_START
sys.auto_start = true; // Re-enable auto start after feed hold.
#endif
bit_false(sys.execute,EXEC_CYCLE_START);
}
}
}