Diff: T64_decoder.c

Revision:

0:28557a4d2215

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/T64_decoder.c	Mon Aug 22 05:48:51 2011 +0000
@@ -0,0 +1,87 @@
+/*----------------------------------------------------------------------------------*/
+/*    These routines are designed to decode a file according the D64 format           */
+/*----------------------------------------------------------------------------------*/
+/*                                                                                  */
+
+/*  History:                                                                        
+    -------- 
+    2008-02-17    started with T64 coding
+*/
+
+/*  TO DO:                                                                          
+    ------
+*/
+
+/*----------------------------------------------------------------------------------*/
+
+
+/*--------------------------------------------------------*/
+/*                        includes                        */
+/*--------------------------------------------------------*/
+#include <mbed.h>
+#include <stdio.h>
+#include <main.h>
+#include <hardware.h>
+#include <fat.h>
+#include <delay.h>
+#include <T64_decoder.h>
+
+/*--------------------------------------------------------*/
+/*                   (tunable) constants                  */ 
+/*--------------------------------------------------------*/
+
+
+/*--------------------------------------------------------*/
+/*                        constants                       */   
+/*--------------------------------------------------------*/
+#define            FALSE            0                /*FALSE*/
+#define            TRUE            1                /*TRUE*/
+
+/*--------------------------------------------------------*/
+/*                         table                          */
+/*--------------------------------------------------------*/
+
+/*variables*/
+extern struct            file2TYPE             file;            /*file handle*/
+
+extern unsigned char    error_code;                /*this holds the error-message generated by one of the disk routines*/
+
+/*--------------------------------------------------------*/
+/*                     local functions                    */
+/*--------------------------------------------------------*/
+
+/*************************************************************************************/
+/*External functions*/
+/*************************************************************************************/
+/*This routine will search for the first dir entry within track 18, it returns the track and sector of the corresponding file*/
+/*mode: 0=first,1=next*/
+unsigned char T64SeekDirEntry(unsigned char mode, unsigned char *track, unsigned char *sector, unsigned char *entry_cnt)
+{
+    static unsigned char     entry_counter, CurrentDirTrack, CurrentDirSector, NextDirTrack, NextDirSector;
+
+    switch(mode)
+    {
+        case 0:    /*read from first directory block (Track 18, Sector 1)*/
+        {
+            entry_counter = 0;
+            break;
+        }
+
+        case 1:    /*read from next directory block (Track , Sector )*/
+        {
+            entry_counter++;
+            break;
+        }
+    }
+
+    *entry_cnt = entry_counter;
+
+    
+    return(TRUE);        /*there is more info stored on other track(s)*/
+}
+
+
+
+/*----------------------------------------------------------------------------------------------*/
+/*----------------------------------------------------------------------------------------------*/
+