Changed error code reported when file not found for G65 macro or named O-sub calls from 39 to 84.

Removed IDLE state requirement for executing G65 macros, an error will no longer be returned and the macro will be run.
Added event handler for outputting welcome message on "native" USB connect for drivers that provides the linestate changed event.

changelog.md

@@ -1,5 +1,26 @@
 ## grblHAL changelog
 
+<a name="20250104">20250104
+
+Core:
+
+* Changed error code reported when file not found for `G65` macro or named `O`-sub calls from `39` to `84`.  
+Removed `IDLE` state requirement for executing `G65` macros, an error will no longer be returned and the macro will be run.  
+
+* Added event handler for outputting welcome message on "native" USB connect for drivers that provides the linestate changed event. Ref. STMF32F4xx issue [#206](https://github.com/grblHAL/STM32F4xx/issues/206). 
+
+Drivers:
+
+* LPC176x: added support for USB linestate changed event.
+
+* iMXRT1062: now outputs the welcome message on the first USB connection after a cold start.
+
+Plugins:
+
+* Bluetooth: updated for core change.
+
+---
+
 <a name="20250103">20250103
 
 Core:
@@ -10,7 +31,7 @@ They can be either set to 0 or to a value in the range 0.5 - 20s. The settings a
 > If the spindle supports "at speed" functionality and this is enabled by setting `$340` \(Spindle at speed tolerance\) > 0 then the spin up delay is used as a timeout value before alarm 14 is raised. If `$394` is set to 0 the timeout will default to one minute.
 
 > [!NOTE]
-> Setting `$392` and `$393`, if available, are now only used for spindle spin up delay and coolant start delay respectively when the safety door is closed.
+> Settings `$392` and `$393`, if available, are now only used for spindle spin up delay and coolant start delay respectively when the safety door is closed.
 
 Plugins:
 

core_handlers.h

@@ -3,7 +3,7 @@
 
   Part of grblHAL
 
-  Copyright (c) 2020-2024 Terje Io
+  Copyright (c) 2020-2025 Terje Io
 
   grblHAL is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -58,7 +58,7 @@ typedef struct {
 
 // Report entry points set by core at startup and reset.
 
-typedef void (*init_message_ptr)(void);
+typedef void (*init_message_ptr)(stream_write_ptr write);
 typedef void (*help_message_ptr)(void);
 typedef status_code_t (*status_message_ptr)(status_code_t status_code);
 typedef message_code_t (*feedback_message_ptr)(message_code_t message_code);

errors.c

@@ -104,6 +104,7 @@ PROGMEM static const status_detail_t status_detail[] = {
     { Status_FlowControlStackOverflow, "Stack overflow while executing flow statement." },
     { Status_FlowControlOutOfMemory, "Out of memory while executing flow statement." },
 #endif
+    { Status_FileOpenFailed, "Could not open file." },
     { Status_UserException, "User defined error occured." }
 #endif // NO_SETTINGS_DESCRIPTIONS
 };

errors.h

@@ -112,6 +112,7 @@ typedef enum {
     Status_FlowControlSyntaxError = 81,
     Status_FlowControlStackOverflow = 82,
     Status_FlowControlOutOfMemory = 83,
+    Status_FileOpenFailed = 84,
     Status_StatusMax = Status_FlowControlOutOfMemory,
     Status_UserException = 253,
     Status_Handled,   // For internal use only

grbl.h

@@ -42,7 +42,7 @@
 #else
 #define GRBL_VERSION "1.1f"
 #endif
-#define GRBL_BUILD 20250103
+#define GRBL_BUILD 20250104
 
 #define GRBL_URL "https://github.com/grblHAL"
 

grbllib.c

@@ -3,7 +3,7 @@
 
   Part of grblHAL
 
-  Copyright (c) 2017-2024 Terje Io
+  Copyright (c) 2017-2025 Terje Io
   Copyright (c) 2011-2015 Sungeun K. Jeon
   Copyright (c) 2009-2011 Simen Svale Skogsrud
 
@@ -92,6 +92,7 @@ grbl_hal_t hal;
 static driver_startup_t driver = { .ok = 0xFF };
 static core_task_t task_pool[CORE_TASK_POOL_SIZE] = {0};
 static core_task_t *next_task = NULL, *immediate_task = NULL, *systick_task = NULL, *last_freed = NULL;
+static on_linestate_changed_ptr on_linestate_changed;
 
 #ifdef KINEMATICS_API
 kinematics_t kinematics;
@@ -166,6 +167,20 @@ ISR_CODE static home_signals_t ISR_FUNC(get_homing_status2)(void)
     return home;
 }
 
+static void output_welcome_message (void *data)
+{
+    grbl.report.init_message(hal.stream.write);
+}
+
+static void onLinestateChanged (serial_linestate_t state)
+{
+    if(state.dtr)
+        task_add_delayed(output_welcome_message, NULL, 200);
+
+    if(on_linestate_changed)
+        on_linestate_changed(state);
+}
+
 // main entry point
 
 int grbl_enter (void)
@@ -333,6 +348,11 @@ int grbl_enter (void)
         setting_remove_elements(Setting_FSOptions, fs_options.mask);
     }
 
+    if(hal.stream.state.linestate_event && !hal.stream.state.passthru) {
+        on_linestate_changed = hal.stream.on_linestate_changed;
+        hal.stream.on_linestate_changed = onLinestateChanged;
+    }
+
     // Initialization loop upon power-up or a system abort. For the latter, all processes
     // will return to this loop to be cleanly re-initialized.
     while(looping) {
@@ -380,7 +400,7 @@ int grbl_enter (void)
             tc_init();
 
         // Print welcome message. Indicates an initialization has occurred at power-up or with a reset.
-        grbl.report.init_message();
+        grbl.report.init_message(hal.stream.write_all);
 
         if(!settings.flags.no_unlock_after_estop && state_get() == STATE_ESTOP)
             state_set(STATE_ALARM);

ngc_flowctrl.c

@@ -661,7 +661,7 @@ status_code_t ngc_flowctrl (uint32_t o_label, char *line, uint_fast8_t *pos, boo
 
                 if(!skipping) {
 
-                    ngc_sub_t *sub;
+                    ngc_sub_t *sub = NULL;
 
                     if(o_label > NGC_MAX_PARAM_ID) {
 
@@ -684,7 +684,7 @@ status_code_t ngc_flowctrl (uint32_t o_label, char *line, uint_fast8_t *pos, boo
                                 if((sub = add_sub(o_label, file)) == NULL)
                                     status = Status_FlowControlOutOfMemory;
                             } else
-                                status = Status_FlowControlOutOfMemory; // file not found...
+                                status = Status_FileOpenFailed;
                        }
                     } else if((sub = subs)) do {
                         if(sub->o_label == o_label && sub->file == hal.stream.file)

report.c

@@ -3,7 +3,7 @@
 
   Part of grblHAL
 
-  Copyright (c) 2017-2024 Terje Io
+  Copyright (c) 2017-2025 Terje Io
   Copyright (c) 2012-2016 Sungeun K. Jeon for Gnea Research LLC
 
   grblHAL is free software: you can redistribute it and/or modify
@@ -323,14 +323,14 @@ static message_code_t report_feedback_message (message_code_t id)
 }
 
 // Welcome message
-static void report_init_message (void)
+static void report_init_message (stream_write_ptr write)
 {
     override_counter = wco_counter = 0;
 
 #if COMPATIBILITY_LEVEL == 0
-    hal.stream.write_all(ASCII_EOL "GrblHAL " GRBL_VERSION " ['$' or '$HELP' for help]" ASCII_EOL);
+    write(ASCII_EOL "GrblHAL " GRBL_VERSION " ['$' or '$HELP' for help]" ASCII_EOL);
 #else
-    hal.stream.write_all(ASCII_EOL "Grbl " GRBL_VERSION " ['$' for help]" ASCII_EOL);
+    write(ASCII_EOL "Grbl " GRBL_VERSION " ['$' for help]" ASCII_EOL);
 #endif
 }
 

stream.c

@@ -3,7 +3,7 @@
 
   Part of grblHAL
 
-  Copyright (c) 2021-2024 Terje Io
+  Copyright (c) 2021-2025 Terje Io
 
   grblHAL is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -255,12 +255,21 @@ static bool stream_select (const io_stream_t *stream, bool add)
     static const io_stream_t *active_stream = NULL;
 
     bool send_init_message = false, mpg_enable = false;
+    static struct {
+        const io_stream_t *stream;
+        on_linestate_changed_ptr on_linestate_changed;
+    } usb = {};
 
     if(stream == base.stream) {
         base.is_up = add ? (stream->is_connected ? stream->is_connected : stream_connected) : is_not_connected;
         return true;
     }
 
+    if(active_stream != NULL && hal.stream.state.is_usb) {
+        usb.stream = active_stream;
+        usb.on_linestate_changed = hal.stream.on_linestate_changed;
+    }
+
     if(!add) { // disconnect
 
         if(stream == base.stream || stream == mpg.stream)
@@ -336,6 +345,9 @@ static bool stream_select (const io_stream_t *stream, bool add)
 
     memcpy(&hal.stream, stream, sizeof(io_stream_t));
 
+    if(stream == usb.stream)
+        hal.stream.on_linestate_changed = usb.on_linestate_changed;
+
     if(stream == base.stream && base.is_up == is_not_connected)
         base.is_up = stream_connected;
 
@@ -345,10 +357,8 @@ static bool stream_select (const io_stream_t *stream, bool add)
     if(stream->type == StreamType_WebSocket && !stream->state.webui_connected)
         hal.stream.state.webui_connected = webui_connected;
 
-    if(send_init_message) {
-        hal.stream.write_all = stream->write;
-        grbl.report.init_message();
-    }
+    if(send_init_message)
+        grbl.report.init_message(stream->write);
 
     hal.stream.write_all = stream_write_all;
     hal.stream.set_enqueue_rt_handler(protocol_enqueue_realtime_command);

stream.h

@@ -3,7 +3,7 @@
 
   Part of grblHAL
 
-  Copyright (c) 2019-2024 Terje Io
+  Copyright (c) 2019-2025 Terje Io
 
   grblHAL is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -235,7 +235,8 @@ typedef union {
         uint8_t webui_connected :1,
                 is_usb          :1,
                 linestate_event :1, //!< Set when driver supports on_linestate_changed event.
-                unused          :5;
+                passthru        :1, //!< Set when stream is in passthru mode.
+                unused          :4;
     };
 } io_stream_state_t;
 

stream_passthru.c

@@ -3,7 +3,7 @@
 
   Part of grblHAL
 
-  Copyright (c) 2024 Terje Io
+  Copyright (c) 2024-2025 Terje Io
 
   grblHAL is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -190,7 +190,7 @@ void stream_passthru_init (uint8_t instance, uint32_t baud_rate, bool start)
 
             io_stream_t const *stream = stream_open_instance(instance, baud_rate, NULL, "Passthru");
 
-            if(stream != NULL) {
+            if((hal.stream.state.passthru = stream != NULL)) {
 
                 protocol_enqueue_foreground_task(passthru_start1, NULL); // enter passthrouh mode after finished booting grblHAL