Diff: Picaso_4DGL-32PTU_Media.cpp

Revision:

20:88e137b9ea46

Parent:

19:a259bc128867

diff -r a259bc128867 -r 88e137b9ea46 Picaso_4DGL-32PTU_Media.cpp
--- a/Picaso_4DGL-32PTU_Media.cpp	Thu Sep 15 13:31:53 2016 +0000
+++ b/Picaso_4DGL-32PTU_Media.cpp	Mon Sep 26 10:51:02 2016 +0000
@@ -233,6 +233,55 @@
     return success;
 }
 
+//**************************************************************************
+// Writes a word to the current media address that was initially set with the 
+// “Set Sector Address” command.
+// 
+// Note: Writing bytes or words to a media sector must start from the beginning
+// of the sector. All writes will be incremental until the “Flush Media” command 
+// is executed, or the sector address rolls over to the next sector. 
+// When the “Flush Media” command is called, any remaining bytes in the sector 
+// will be padded with 0xFF, destroying the previous contents. 
+// An attempt to use the “Set Byte Address” command will result in the 
+// lower 9 bits being interpreted as zero. If the writing rolls over to the 
+// next sector, the “Flush Media” command is issued automatically internally.
+//**************************************************************************
+bool PICASO_4DGL :: media_WriteWord(short value) {
+
+    char command[4] = "";
+    
+    command[0] = (MEDIA_WRITE_WORD >> (8*1)) & 0xff;
+    command[1] = (MEDIA_WRITE_WORD >> (8*0)) & 0xff;
+    command[2] = (value >> (8*1)) & 0xff;
+    command[3] = (value >> (8*0)) & 0xff;
+    
+    writeCOMMAND(command, 4);
+    bool success = writeByteResponse();
+#ifdef DEBUGMODE
+    pc.printf("\n\r DEBUG: Write Byte: %i\n\r", success);
+#endif
+    return success;
+}
+
+//**************************************************************************
+// After writing any data to a sector, the Flush Media command should be called
+// to ensure that the current sector that is being written is correctly stored
+// back to the media else write operations may be unpredictable.
+//**************************************************************************
+bool PICASO_4DGL :: media_Flush() {
+
+    char command[2] = "";
+    
+    command[0] = (MEDIA_FLUSH >> (8*1)) & 0xff;
+    command[1] = (MEDIA_FLUSH >> (8*0)) & 0xff;
+    
+    writeCOMMAND(command, 2);
+    bool success = writeByteResponse();
+#ifdef DEBUGMODE
+    pc.printf("\n\r DEBUG: Read Word: %i\n\r", success);
+#endif
+    return success;
+}
 
 
 
@@ -263,3 +312,4 @@
 
 
 
+