Fixed ConfigAlarm

It was locking the system with a confusing message that
looked like an ordinary alarm, could not be cleared,
and prevented actions that could fix it.

I also enhanced $T to show the name of the system state
in addition to the magic number.

Grbl_Esp32/src/ProcessSettings.cpp

@@ -222,7 +222,7 @@ Error toggle_check_mode(const char* value, WebUI::AuthenticationLevel auth_level
     return Error::Ok;
 }
 Error disable_alarm_lock(const char* value, WebUI::AuthenticationLevel auth_level, WebUI::ESPResponseStream* out) {
-    if (sys.state == State::Alarm) {
+    if (sys.state == State::Alarm || sys.state == State::ConfigAlarm) {
         // Block if safety door is ajar.
         if (config->_control->system_check_safety_door_ajar()) {
             return Error::CheckDoor;
@@ -334,9 +334,15 @@ Error restore_settings(const char* value, WebUI::AuthenticationLevel auth_level,
 }
 
 Error showState(const char* value, WebUI::AuthenticationLevel auth_level, WebUI::ESPResponseStream* out) {
-    grbl_sendf(out->client(), "State 0x%x\r\n", sys.state);
+    const char* name;
+    const State state = sys.state;
+    auto        it    = StateName.find(state);
+    name              = it == StateName.end() ? "<invalid>" : it->second;
+
+    grbl_sendf(out->client(), "State %d (%s)\r\n", state, name);
     return Error::Ok;
 }
+
 Error doJog(const char* value, WebUI::AuthenticationLevel auth_level, WebUI::ESPResponseStream* out) {
     // For jogging, you must give gc_execute_line() a line that
     // begins with $J=.  There are several ways we can get here,
@@ -357,6 +363,9 @@ const char* alarmString(ExecAlarm alarmNumber) {
 }
 
 Error listAlarms(const char* value, WebUI::AuthenticationLevel auth_level, WebUI::ESPResponseStream* out) {
+    if (sys_rt_exec_alarm != ExecAlarm::None) {
+        grbl_sendf(out->client(), "Active alarm: %d (%s)\r\n", int(sys_rt_exec_alarm), alarmString(sys_rt_exec_alarm));
+    }
     if (value) {
         char*   endptr      = NULL;
         uint8_t alarmNumber = strtol(value, &endptr, 10);

Grbl_Esp32/src/Protocol.cpp

@@ -138,7 +138,7 @@ void protocol_main_loop() {
     // NOTE: Sleep mode disables the stepper drivers and position can't be guaranteed.
     // Re-initialize the sleep state as an ALARM mode to ensure user homes or acknowledges.
     if (sys.state == State::ConfigAlarm) {
-        report_feedback_message(Message::AlarmLock);
+        report_feedback_message(Message::ConfigAlarmLock);
     } else if (sys.state == State::Alarm || sys.state == State::Sleep) {
         report_feedback_message(Message::AlarmLock);
         sys.state = State::Alarm;  // Ensure alarm state is set.

Grbl_Esp32/src/Report.cpp

@@ -283,6 +283,7 @@ std::map<Message, const char*> MessageText = {
     { Message::RestoreDefaults, "Restoring defaults" },
     { Message::SpindleRestore, "Restoring spindle" },
     { Message::SleepMode, "Sleeping" },
+    { Message::ConfigAlarmLock, "Configuration error - '$X' to unlock" },
     // Handled separately due to numeric argument
     // { Message::SdFileQuit, "Reset during SD file at line: %d" },
 };
@@ -297,8 +298,7 @@ void report_feedback_message(Message message) {  // ok to send to all clients
         grbl_notifyf("SD print canceled", "Reset during SD file at line: %d", config->_sdCard->get_current_line_number());
         info_serial("Reset during SD file at line: %d", config->_sdCard->get_current_line_number());
 
-    } else
-    {
+    } else {
         auto it = MessageText.find(message);
         if (it != MessageText.end()) {
             info_serial(it->second);

Grbl_Esp32/src/Report.h

@@ -47,6 +47,7 @@ enum class Message : uint8_t {
     RestoreDefaults = 9,
     SpindleRestore  = 10,
     SleepMode       = 11,
+    ConfigAlarmLock = 12,
     SdFileQuit      = 60,  // mc_reset was called during an SD job
 };
 

Grbl_Esp32/src/Settings.cpp

@@ -10,7 +10,7 @@ bool idleOrJog() {
     return sys.state != State::Idle && sys.state != State::Jog;
 }
 bool idleOrAlarm() {
-    return sys.state != State::Idle && sys.state != State::Alarm;
+    return sys.state != State::Idle && sys.state != State::Alarm && sys.state != State::ConfigAlarm;
 }
 bool notCycleOrHold() {
     return sys.state == State::Cycle && sys.state == State::Hold;

Grbl_Esp32/src/System.cpp

@@ -214,3 +214,16 @@ void __attribute__((weak)) user_defined_macro(uint8_t index) {
     strcat(line, "\r");
     WebUI::inputBuffer.push(line);
 }
+
+std::map<State, const char*> StateName = {
+    { State::Idle, "Idle" },
+    { State::Alarm, "Alarm" },
+    { State::CheckMode, "CheckMode" },
+    { State::Homing, "Homing" },
+    { State::Cycle, "Cycle" },
+    { State::Hold, "Hold" },
+    { State::Jog, "Jog" },
+    { State::SafetyDoor, "SafetyDoor" },
+    { State::Sleep, "Sleep" },
+    { State::ConfigAlarm, "ConfigAlarm" },
+};

Grbl_Esp32/src/System.h

@@ -43,6 +43,8 @@ enum class State : uint8_t {
     ConfigAlarm,  // You can't do anything but fix your config file.
 };
 
+extern std::map<State, const char*> StateName;
+
 // Step segment generator state flags.
 struct StepControl {
     uint8_t endMotion : 1;