Merge pull request #1155 from thinkyhead/lcd_wait_better

M0-M1 Enhancements

Marlin/Marlin_main.cpp

       st_synchronize();
       codenum += millis();  // keep track of when we started waiting
       previous_millis_cmd = millis();
-      while(millis()  < codenum ){
+      while(millis() < codenum) {
         manage_heater();
         manage_inactivity();
         lcd_update();
       plan_bed_level_matrix.set_to_identity();  //Reset the plane ("erase" all leveling data)
 #endif //ENABLE_AUTO_BED_LEVELING
 
-
       saved_feedrate = feedrate;
       saved_feedmultiply = feedmultiply;
       feedmultiply = 100;
     case 0: // M0 - Unconditional stop - Wait for user button press on LCD
     case 1: // M1 - Conditional stop - Wait for user button press on LCD
     {
-      LCD_MESSAGEPGM(MSG_USERWAIT);
+      char *src = strchr_pointer + 2;
+
       codenum = 0;
-      if(code_seen('P')) codenum = code_value(); // milliseconds to wait
-      if(code_seen('S')) codenum = code_value() * 1000; // seconds to wait
 
+      bool hasP = false, hasS = false;
+      if (code_seen('P')) {
+        codenum = code_value(); // milliseconds to wait
+        hasP = codenum > 0;
+      }
+      if (code_seen('S')) {
+        codenum = code_value() * 1000; // seconds to wait
+        hasS = codenum > 0;
+      }
+      if (!hasP && !hasS && *src != '\0') {
+        starpos = strchr(src, '*');
+        if (starpos != NULL) *(starpos) = '\0';
+        while (*src == ' ') ++src;
+        lcd_setstatus(src);
+      } else {
+        LCD_MESSAGEPGM(MSG_USERWAIT);
+      }
+
+      lcd_ignore_click();
       st_synchronize();
       previous_millis_cmd = millis();
       if (codenum > 0){
         codenum += millis();  // keep track of when we started waiting
-        while(millis()  < codenum && !lcd_clicked()){
+        while(millis() < codenum && !lcd_clicked()){
           manage_heater();
           manage_inactivity();
           lcd_update();
         }
+        lcd_ignore_click(false);
       }else{
         while(!lcd_clicked()){
           manage_heater();
           lcd_update();
         }
       }
-      LCD_MESSAGEPGM(MSG_RESUMING);
+      if (IS_SD_PRINTING)
+        LCD_MESSAGEPGM(MSG_RESUMING);
+      else
+        LCD_MESSAGEPGM(WELCOME_MSG);
     }
     break;
 #endif

Marlin/ultralcd.cpp

 menuFunc_t currentMenu = lcd_status_screen; /* function pointer to the currently active menu */
 uint32_t lcd_next_update_millis;
 uint8_t lcd_status_update_delay;
+bool ignore_click = false;
+bool wait_for_unclick;
 uint8_t lcdDrawUpdate = 2;                  /* Set to none-zero when the LCD needs to draw, decreased after every draw. Set to 2 in LCD routines so the LCD gets at least 1 full redraw (first redraw is partial) */
 
 //prevMenu and prevEncoderPosition are used to store the previous menu location when editing settings.
         lcd_status_update_delay = 10;   /* redraw the main screen every second. This is easier then trying keep track of all things that change on the screen */
     }
 #ifdef ULTIPANEL
-    if (LCD_CLICKED)
+
+    bool current_click = LCD_CLICKED;
+
+    if (ignore_click) {
+        if (wait_for_unclick) {
+          if (!current_click) {
+              ignore_click = wait_for_unclick = false;
+          }
+          else {
+              current_click = false;
+          }
+        }
+        else if (current_click) {
+            lcd_quick_feedback();
+            wait_for_unclick = true;
+            current_click = false;
+        }
+    }
+
+    if (current_click)
     {
         currentMenu = lcd_main_menu;
         encoderPosition = 0;
     }
 }
 
+void lcd_ignore_click(bool b)
+{
+    ignore_click = b;
+    wait_for_unclick = false;
+}
+
 void lcd_setstatus(const char* message)
 {
     if (lcd_status_message_level > 0)

Marlin/ultralcd.h

   void lcd_buzz(long duration,uint16_t freq);
   bool lcd_clicked();
 
+  void lcd_ignore_click(bool b=true);
+
   #ifdef NEWPANEL
     #define EN_C (1<<BLEN_C)
     #define EN_B (1<<BLEN_B)