Add AUTO_REPORT_SD_STATUS feature

For parity with 2.0.x ahead of 1.1.9 release.

Marlin/Configuration_adv.h

@@ -1410,6 +1410,11 @@
  */
 #define AUTO_REPORT_TEMPERATURES
 
+/**
+ * Auto-report SdCard status with M27 S<seconds>
+ */
+//#define AUTO_REPORT_SD_STATUS
+
 /**
  * Include capabilities in M115 output
  */

Marlin/Marlin_main.cpp

@@ -89,7 +89,7 @@
  * M24  - Start/resume SD print. (Requires SDSUPPORT)
  * M25  - Pause SD print. (Requires SDSUPPORT)
  * M26  - Set SD position in bytes: "M26 S12345". (Requires SDSUPPORT)
- * M27  - Report SD print status. (Requires SDSUPPORT)
+ * M27  - Report SD print status. (Requires SDSUPPORT) Or, with 'S<seconds>' sets the SD status auto-report interval. (Requires AUTO_REPORT_SD_STATUS)
  * M28  - Start SD write: "M28 /path/file.gco". (Requires SDSUPPORT)
  * M29  - Stop SD write. (Requires SDSUPPORT)
  * M30  - Delete file from SD: "M30 /path/file.gco"
@@ -6886,9 +6886,17 @@ inline void gcode_M17() {
   }
 
   /**
-   * M27: Get SD Card status
+   * M27: Get SD Card status or set the SD status auto-report interval.
+
    */
-  inline void gcode_M27() { card.getStatus(); }
+  inline void gcode_M27() {
+    #if ENABLED(AUTO_REPORT_SD_STATUS)
+      if (parser.seenval('S'))
+        card.set_auto_report_interval(parser.value_byte());
+      else
+    #endif
+        card.getStatus();
+  }
 
   /**
    * M28: Start SD Write
@@ -8636,6 +8644,13 @@ inline void gcode_M115() {
       #endif
     );
 
+    // AUTOREPORT_SD_STATUS (M27 extension)
+    cap_line(PSTR("AUTOREPORT_SD_STATUS")
+      #if ENABLED(AUTO_REPORT_SD_STATUS)
+        , true
+      #endif
+    );
+
   #endif // EXTENDED_CAPABILITIES_REPORT
 }
 
@@ -13467,6 +13482,10 @@ void idle(
       i2cpem_next_update_ms = millis() + I2CPE_MIN_UPD_TIME_MS;
     }
   #endif
+
+  #if ENABLED(AUTO_REPORT_SD_STATUS)
+    card.auto_report_sd_status();
+  #endif
 }
 
 /**

Marlin/cardreader.cpp

@@ -911,4 +911,17 @@ void CardReader::printingHasFinished() {
   }
 }
 
+#if ENABLED(AUTO_REPORT_SD_STATUS)
+  uint8_t CardReader::auto_report_sd_interval = 0;
+  millis_t CardReader::next_sd_report_ms;
+
+  void CardReader::auto_report_sd_status() {
+    millis_t current_ms = millis();
+    if (auto_report_sd_interval && ELAPSED(current_ms, next_sd_report_ms)) {
+      next_sd_report_ms = current_ms + 1000UL * auto_report_sd_interval;
+      getStatus();
+    }
+  }
+#endif // AUTO_REPORT_SD_STATUS
+
 #endif // SDSUPPORT

Marlin/cardreader.h

@@ -90,10 +90,19 @@ public:
   FORCE_INLINE uint8_t percentDone() { return (isFileOpen() && filesize) ? sdpos / ((filesize + 99) / 100) : 0; }
   FORCE_INLINE char* getWorkDirName() { workDir.getFilename(filename); return filename; }
 
-public:
+  #if ENABLED(AUTO_REPORT_SD_STATUS)
+    void auto_report_sd_status(void);
+    FORCE_INLINE void set_auto_report_interval(uint8_t v) {
+      NOMORE(v, 60);
+      auto_report_sd_interval = v;
+      next_sd_report_ms = millis() + 1000UL * v;
+    }
+  #endif
+
   bool saving, logging, sdprinting, cardOK, filenameIsDir;
   char filename[FILENAME_LENGTH], longFilename[LONG_FILENAME_LENGTH];
   int autostart_index;
+
 private:
   SdFile root, *curDir, workDir, workDirParents[MAX_DIR_DEPTH];
   uint8_t workDirDepth;
@@ -170,6 +179,11 @@ private:
   #if ENABLED(SDCARD_SORT_ALPHA)
     void flush_presort();
   #endif
+
+  #if ENABLED(AUTO_REPORT_SD_STATUS)
+    static uint8_t auto_report_sd_interval;
+    static millis_t next_sd_report_ms;
+  #endif
 };
 
 #if PIN_EXISTS(SD_DETECT)