Diff: main.cpp

Revision:

0:d0eea54553ed

Child:

1:4a0985d3a848

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Jun 21 22:59:02 2011 +0000
@@ -0,0 +1,139 @@
+// example writing to SD card, sford
+// Modified 21 June 2011 by D. Wendelboe to test SD file and directory creation.
+// Two procedures were added. One to renam a file (via copy), and a procedure to 
+// copy a file.
+
+#include "mbed.h"
+#include "SDFileSystem.h"
+
+SDFileSystem sd(p5, p6, p7, p8, "sd"); 
+
+int file_rename(const char *oldfile, const char *newfile);
+int file_copy(const char *oldfile, const char *newfile);
+
+int main() 
+{
+    int i, status;
+    
+    printf("Hello World!\n");   
+
+    mkdir("/sd/mydir1", 0777);
+    mkdir("/sd/mydir2", 0777);
+    mkdir("/sd/mydir3", 0777);
+    
+//--------------------------------------------------------------    
+    FILE *fp = fopen("/sd/mydir1/sdtest.txt", "w");
+    if(fp == NULL) {
+        error("Could not open file for write\n");
+    }
+    fprintf(fp, "Hello SD Card World!\n");
+    for (i=0; i<10; i++)
+    {
+        fprintf(fp, "Line #%i\n", i);
+    }
+    fclose(fp); 
+                   
+//--------------------------------------------------------------
+    printf("Open directory on /sd\n");    
+    DIR *d = opendir("/sd");              
+    struct dirent *p;
+    while((p = readdir(d)) != NULL) {         
+      printf("%s\n", p->d_name);            
+    }
+    closedir(d);
+    printf("Directory closed\n");
+    
+ //--------------------------------------------------------------  
+    printf("Remove /sd/mydir3\n"); 
+    remove("/sd/mydir3");                
+  
+ //-------------------------------------------------------------- 
+    printf("Rename sdtest.txt to doug.txt\n");
+    status = file_rename("/sd/mydir1/sdtest.txt", "/sd/mydir1/doug.txt");
+
+    if (status == -1)  printf("Error: New file not created: %d\n", status);
+    else printf("New file was created: %d\n", status);
+    
+//--------------------------------------------------------------
+    status = file_copy("/sd/mydir1/doug.txt", "/sd/mydir1/doug2.txt");
+
+    if (status == -1)  printf("Error: file not copied: %d\n", status);
+    else printf("Success: file copied: %d\n", status);
+
+//--------------------------------------------------------------
+    fp = fopen("/sd/mydir2/sdtest2.txt", "w");
+    if(fp == NULL) {
+        error("Could not open file for write\n");
+    }
+    fprintf(fp, "This is a second directory.\n");
+    for (i=0; i<10; i++) {
+        fprintf(fp, "Line #%C\n", i+'a');
+    }
+    fclose(fp); 
+
+    printf("Goodbye World!\n");
+}   
+
+//***********************************************************
+// file_rename: renames a file.
+//    Kind of hoakey as it moves data instead of adjusting
+//    the file name in the directory. 
+//    Checks to insure the file was renamed.
+//    Returns -1 = error; 0 = success
+//***********************************************************
+int file_rename(const char *oldfile, const char *newfile) {
+    int retval = 0;
+    int ch;
+
+    FILE *fpold = fopen(oldfile, "r");
+    FILE *fpnew = fopen(newfile, "w");
+    
+    while (1) {  
+        ch = fgetc(fpold); 
+        if (ch == EOF) break;
+        fputc(ch, fpnew);  
+    }
+    
+    fclose(fpnew);
+    fclose(fpold);
+
+    fpnew = fopen(newfile, "r");
+    if(fpnew == NULL) {
+        retval = (-1);
+    } 
+    else {
+        remove(oldfile);
+    }
+    return (retval);
+}
+
+//***********************************************************
+// file_copy: Copies a file
+//            Checks to insure destination file was created.
+//            Returns -1 = error; 0 = success
+//***********************************************************
+int file_copy(const char *oldfile, const char *newfile) {
+    int retval = 0;
+    int ch;
+
+    FILE *fpold = fopen(oldfile, "r");
+    FILE *fpnew = fopen(newfile, "w");
+    
+    while (1) {  
+        ch = fgetc(fpold); 
+        if (ch == EOF) break;
+        fputc(ch, fpnew);  
+    }
+    
+    fclose(fpnew);
+    fclose(fpold);    
+    
+    fclose(fpnew);
+    fclose(fpold);
+
+    fpnew = fopen(newfile, "r");
+    if(fpnew == NULL) {
+        retval = (-1);
+    } 
+    return (retval);
+}
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