Diff: main.cpp

Revision:

0:2191a269e668

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Apr 03 21:01:22 2012 +0000
@@ -0,0 +1,74 @@
+#include "mbed.h"
+#include "SDFileSystem.h"
+
+Serial          pc(USBTX, USBRX);
+LocalFileSystem chip("uc");
+SDFileSystem    sd(p5, p6, p7, p8,"sd");
+
+int main () {
+    pc.baud(115200);
+    FILE * pFile;
+    long lSize;
+    char * buffer;
+    size_t result;
+
+    pFile = fopen ( "/sd/Justin.mp3","r");
+    if (pFile==NULL) {
+        fputs ("File error",stderr);
+        exit (1);
+    }
+    // obtain file size:
+    fseek (pFile , 0 , SEEK_END);
+    lSize = ftell (pFile);
+    rewind (pFile);
+    pc.printf("Tamanio: %d\n",lSize);
+    wait(3);
+    // allocate memory to contain the whole file:
+    buffer = (char*) malloc (sizeof(char)*lSize);
+    if (buffer == NULL) {
+        fputs ("Memory error",stderr);
+        exit (2);
+    }
+    // copy the file into the buffer:
+    result = fread (buffer,1,lSize,pFile);
+    if (result != lSize) {
+        fputs ("Reading error",stderr);
+        exit (3);
+    }
+    pc.printf("%s",buffer);
+    /* the whole file is now loaded in the memory buffer. */
+    fclose (pFile);
+    free (buffer);
+    return 0;
+}
+
+//This code loads myfile.bin into a dynamically allocated memory buffer,
+//which can be used to manipulate the content of a file as an array.
+
+
+/*
+function: fread
+Library:  <cstdio>
+
+size_t fread ( void * ptr, size_t size, size_t count, FILE * stream );
+
+Read block of data from stream
+Reads an array of count elements, each one with a size of size bytes, from the stream and stores them in the block of memory specified by ptr.
+The postion indicator of the stream is advanced by the total amount of bytes read.
+The total amount of bytes read if successful is (size * count).
+
+Parameters
+
+ptr         Pointer to a block of memory with a minimum size of (size*count) bytes.
+size        Size in bytes of each element to be read.
+count       Number of elements, each one with a size of size bytes.
+stream      Pointer to a FILE object that specifies an input stream.
+
+
+Return Value
+The total number of elements successfully read is returned as a size_t object, which is an integral data type.
+If this number differs from the count parameter, either an error occured or the End Of File was reached.
+You can use either ferror or feof to check whether an error happened or the End-of-File was reached.
+*/
+
+