made cardreader more selfsustained

Marlin/Marlin.pde

   if(buflen)
   {
     #ifdef SDSUPPORT
-      if(card.savetosd)
+      if(card.saving)
       {
 	if(strstr(cmdbuffer[bufindr],"M29") == NULL)
 	{
           case 2:
           case 3:
 	    #ifdef SDSUPPORT
-            if(card.savetosd)
+            if(card.saving)
               break;
 	    #endif //SDSUPPORT
             Serial.println("ok"); 
     }
   }
   #ifdef SDSUPPORT
-  if(!card.sdmode || serial_count!=0){
+  if(!card.sdprinting || serial_count!=0){
     return;
   }
-  while( card.filesize > card.sdpos  && buflen < BUFSIZE) {
-    short n = card.file.read();
-    serial_char = (char)n;
-    if(serial_char == '\n' || serial_char == '\r' || serial_char == ':' || serial_count >= (MAX_CMD_SIZE - 1) || n == -1) 
+  while( !card.eof()  && buflen < BUFSIZE) {
+    
+    serial_char = card.get();
+    if(serial_char == '\n' || serial_char == '\r' || serial_char == ':' || serial_count >= (MAX_CMD_SIZE - 1)) 
     {
-      card.sdpos = card.file.curPosition();
-      if(card.sdpos >= card.filesize){
-        card.sdmode = false;
+     
+      if(card.eof()){
+        card.sdprinting = false;
         Serial.println("echo: Done printing file");
         stoptime=millis();
         char time[30];
 
     case 20: // M20 - list SD card
       Serial.println("Begin file list");
-      card.root.ls();
+      card.ls();
       Serial.println("End file list");
       break;
     case 21: // M21 - init SD card
-      card.sdmode = false;
+      
       card.initsd();
       break;
     case 22: //M22 - release SD card
-      card.sdmode = false;
-      card.sdactive = false;
+      card.release();
+
       break;
     case 23: //M23 - Select file
-      if(card.sdactive){
-        card.sdmode = false;
-        card.file.close();
-        starpos = (strchr(strchr_pointer + 4,'*'));
-        if(starpos!=NULL)
-          *(starpos-1)='\0';
-        if (card.file.open(&card.root, strchr_pointer + 4, O_READ)) {
-          Serial.print("File opened:");
-          Serial.print(strchr_pointer + 4);
-          Serial.print(" Size:");
-          Serial.println(card.file.fileSize());
-          card.sdpos = 0;
-          card.filesize = card.file.fileSize();
-          Serial.println("File selected");
-        }
-        else{
-          Serial.println("file.open failed");
-        }
-      }
+      starpos = (strchr(strchr_pointer + 4,'*'));
+      if(starpos!=NULL)
+        *(starpos-1)='\0';
+      card.selectFile(strchr_pointer + 4);
       break;
     case 24: //M24 - Start SD print
-      if(card.sdactive){
-        card.sdmode = true;
-	starttime=millis();
-      }
+      card.startFileprint();
+      starttime=millis();
       break;
     case 25: //M25 - Pause SD print
-      if(card.sdmode){
-        card.sdmode = false;
-      }
+      card.pauseSDPrint();
       break;
     case 26: //M26 - Set SD index
-      if(card.sdactive && code_seen('S')){
-        card.sdpos = code_value_long();
-        card.file.seekSet(card.sdpos);
+      if(card.cardOK && code_seen('S')){
+        card.setIndex(code_value_long());
+        
       }
       break;
     case 27: //M27 - Get SD status
-      if(card.sdactive){
-        Serial.print("SD printing byte ");
-        Serial.print(card.sdpos);
-        Serial.print("/");
-        Serial.println(card.filesize);
-      }
-      else{
-        Serial.println("Not SD printing");
-      }
+      card.getStatus();
       break;
     case 28: //M28 - Start SD write
-      if(card.sdactive){
-        char* npos = 0;
-        card.file.close();
-        card.sdmode = false;
-        starpos = (strchr(strchr_pointer + 4,'*'));
-        if(starpos != NULL){
-          npos = strchr(cmdbuffer[bufindr], 'N');
-          strchr_pointer = strchr(npos,' ') + 1;
-          *(starpos-1) = '\0';
-        }
-        if (!card.file.open(&card.root, strchr_pointer+4, O_CREAT | O_APPEND | O_WRITE | O_TRUNC))
-        {
-          Serial.print("open failed, File: ");
-          Serial.print(strchr_pointer + 4);
-          Serial.print(".");
-        }
-        else{
-          card.savetosd = true;
-          Serial.print("Writing to file: ");
-          Serial.println(strchr_pointer + 4);
-        }
+      starpos = (strchr(strchr_pointer + 4,'*'));
+      if(starpos != NULL){
+        char* npos = strchr(cmdbuffer[bufindr], 'N');
+        strchr_pointer = strchr(npos,' ') + 1;
+        *(starpos-1) = '\0';
       }
+      card.startFilewrite(strchr_pointer+4);
+      
       break;
     case 29: //M29 - Stop SD write
       //processed in write to file routine above
-      //savetosd = false;
+      //card,saving = false;
       break;
     #endif //SDSUPPORT
 

Marlin/cardreader.h

   void checkautostart(bool x); 
   
   void closefile();
+  void release();
+  void startFileprint();
+  void startFilewrite(char *name);
+  void pauseSDPrint();
+  void getStatus();
+  
+  void selectFile(char* name);
   void getfilename(const uint8_t nr);
   uint8_t getnrfilenames();
+  
+
+  inline void ls() {root.ls();};
+  inline bool eof() { sdpos = file.curPosition();return sdpos>=filesize ;};
+  inline char get() {  int16_t n = file.read(); return (n!=-1)?(char)n:'\n';};
+  inline void setIndex(long index) {sdpos = index;file.seekSet(index);};
 
 public:
-  bool savetosd;
+  bool saving;
+  bool sdprinting ;  
+  bool cardOK ;
+  char filename[11];
+private:
+  SdFile root;
+  Sd2Card card;
+  SdVolume volume;
   SdFile file;
   uint32_t filesize;
+  //int16_t n;
+  unsigned long autostart_atmillis;
   uint32_t sdpos ;
-  bool sdmode ;
-  SdFile root;
-  bool sdactive ;
-  char filename[11];
-private:
-   Sd2Card card;
-   SdVolume volume;
-
-   //int16_t n;
-   unsigned long autostart_atmillis;
 
-   bool autostart_stilltocheck; //the sd start is delayed, because otherwise the serial cannot answer fast enought to make contact with the hostsoftware.
+  bool autostart_stilltocheck; //the sd start is delayed, because otherwise the serial cannot answer fast enought to make contact with the hostsoftware.
 };
   
 #endif //SDSUPPORT

Marlin/cardreader.pde

 {
    filesize = 0;
    sdpos = 0;
-   sdmode = false;
-   sdactive = false;
-   savetosd = false;
+   sdprinting = false;
+   cardOK = false;
+   saving = false;
    autostart_atmillis=0;
 
    autostart_stilltocheck=true; //the sd start is delayed, because otherwise the serial cannot answer fast enought to make contact with the hostsoftware.
 
 void CardReader::initsd()
 {
-  sdactive = false;
+  cardOK = false;
   #if SDSS >- 1
     if(root.isOpen())
       root.close();
     }
     else 
     {
-      sdactive = true;
+      cardOK = true;
       SERIAL_ECHOLN("SD card ok");
     }
   #endif //SDSS
 }
+void CardReader::release()
+{
+  sdprinting = false;
+  cardOK = false;
+}
+
+void CardReader::startFileprint()
+{
+  if(cardOK)
+  {
+    sdprinting = true;
+    
+  }
+}
+
+void CardReader::pauseSDPrint()
+{
+  if(sdprinting)
+  {
+    sdprinting = false;
+  }
+}
+
+void CardReader::selectFile(char* name)
+{
+  if(cardOK){
+    sdprinting = false;
+    file.close();
+   
+    if (file.open(&root, name, O_READ)) {
+      Serial.print("File opened:");
+      Serial.print(name);
+      Serial.print(" Size:");
+      filesize = file.fileSize();
+      Serial.println(filesize);
+      sdpos = 0;
+      
+      Serial.println("File selected");
+    }
+    else{
+      Serial.println("file.open failed");
+    }
+  }
+}
 
+void CardReader::startFilewrite(char *name)
+{
+  if(cardOK)
+  {
+    
+    file.close();
+    sdprinting = false;
+    
+    if (!file.open(&root, name, O_CREAT | O_APPEND | O_WRITE | O_TRUNC))
+    {
+      Serial.print("open failed, File: ");
+      Serial.print(name);
+      Serial.print(".");
+    }
+    else{
+      saving = true;
+      Serial.print("Writing to file: ");
+      Serial.println(name);
+    }
+  }
+}
+
+void CardReader::getStatus()
+{
+  if(cardOK){
+    Serial.print("SD printing byte ");
+    Serial.print(sdpos);
+    Serial.print("/");
+    Serial.println(filesize);
+  }
+  else{
+    Serial.println("Not SD printing");
+  }
+}
 void CardReader::write_command(char *buf)
 {
   char* begin = buf;
       return;
   }
   autostart_stilltocheck=false;
-  if(!sdactive)
+  if(!cardOK)
   {
     initsd();
-    if(!sdactive) //fail
+    if(!cardOK) //fail
       return;
   }
   static int lastnr=0;
 
 void CardReader::closefile()
 {
- file.sync();
+  file.sync();
   file.close();
-  savetosd = false; 
+  saving = false; 
 }
 
 void CardReader::getfilename(const uint8_t nr)

Marlin/ultralcd.pde

  if(force_lcd_update)
  {
    clear();
-  if(card.sdactive)
+  if(card.cardOK)
   {
     nrfiles=card.getnrfilenames();
   }
             if(true)
           #endif
           {
-            if(card.sdmode)
+            if(card.sdprinting)
               lcd.print(" Stop Print   \x7E");
             else
               lcd.print(" Card Menu    \x7E");
         #endif
         if((activeline==line)&&CLICKED)
         {
-          card.sdmode = false;
+          card.sdprinting = false;
           BLOCK;
           status=Main_SD;
           beepshort();
       }
       else
       {
-        card.sdactive=false;
+        card.release();
         lcd_status("Card removed");
       }
     }