Diff: main.cpp

Revision:

1:2fb056322926

Parent:

0:2ec42a097d17

Child:

2:ee10b396e545

--- a/main.cpp	Tue Mar 14 06:34:01 2017 +0000
+++ b/main.cpp	Wed Mar 15 11:52:57 2017 +0800
@@ -1,7 +1,82 @@
 #include "mbed.h"
+#include "FATFileSystem.h"
+#include "NuSDBlockDevice.h"
+#include <stdio.h>
+#include <errno.h>
+
+NuSDBlockDevice bd;
+FATFileSystem fs("fs");
+
+void return_error(int ret_val){
+  if (ret_val)
+    printf("Failure. %d\r\n", ret_val);
+  else
+    printf("done.\r\n");
+}
+
+void errno_error(void* ret_val){
+  if (ret_val == NULL)
+    printf(" Failure. %d \r\n", errno);
+  else
+    printf(" done.\r\n");
+}
 
 int main() {
-    // TO BE CONTINUED
-    return 0;
+  int error = 0;
+  printf("Welcome to the filesystem example.\r\n"
+         "Formatting a FAT, SD-backed filesystem. ");
+  error = FATFileSystem::format(&bd);
+  return_error(error);
+
+  printf("Mounting the filesystem on \"/fs\". ");
+  error = fs.mount(&bd);
+  return_error(error);
+
+  printf("Opening a new file, numbers.txt.");
+  FILE* fd = fopen("/fs/numbers.txt", "w");
+  errno_error(fd);
+
+  for (int i = 0; i < 20; i++){
+    printf("Writing decimal numbers to a file (%d/20)\r", i);
+    fprintf(fd, "%d\r\n", i);
+  }
+  printf("Writing decimal numbers to a file (20/20) done.\r\n");
+
+  printf("Closing file.");
+  fclose(fd);
+  printf(" done.\r\n");
+
+  printf("Re-opening file read-only.");
+  fd = fopen("/fs/numbers.txt", "r");
+  errno_error(fd);
+
+  printf("Dumping file to screen.\r\n");
+  char buff[16] = {0};
+  while (!feof(fd)){
+    int size = fread(&buff[0], 1, 15, fd);
+    fwrite(&buff[0], 1, size, stdout);
+  }
+  printf("EOF.\r\n");
+
+  printf("Closing file.");
+  fclose(fd);
+  printf(" done.\r\n");
+
+  printf("Opening root directory.");
+  DIR* dir = opendir("/fs/");
+  errno_error(fd);
+
+  struct dirent* de;
+  printf("Printing all filenames:\r\n");
+  while((de = readdir(dir)) != NULL){
+    printf("  %s\r\n", &(de->d_name)[0]);
+  }
+
+  printf("Closeing root directory. ");
+  error = closedir(dir);
+  return_error(error);
+  printf("Filesystem Demo complete.\r\n");
+
+  while (true) {}
 }