main.cpp

00001 #include "mbed.h"
00002 #include "FATFileSystem.h"
00003 #include "SDBlockDevice.h"
00004 #include <stdio.h>
00005 #include <errno.h>
00006 /* mbed_retarget.h is included after errno.h so symbols are mapped to
00007  * consistent values for all toolchains */
00008 #include "platform/mbed_retarget.h"
00009 
00010 #if defined(TARGET_WIO_3G)
00011 DigitalOut SD_POWER(PA_15, 1);
00012 #endif
00013 
00014 // #define DO_FORMAT
00015 
00016 SDBlockDevice sd(MBED_CONF_APP_SPI_MOSI, MBED_CONF_APP_SPI_MISO, MBED_CONF_APP_SPI_CLK, MBED_CONF_APP_SPI_CS);
00017 FATFileSystem fs("sd", &sd);
00018 Serial pc(USBTX, USBRX, 115200);
00019 
00020 void return_error(int ret_val)
00021 {
00022     if (ret_val)
00023         pc.printf("Failure. %d\n", ret_val);
00024     else
00025         pc.printf("done.\n");
00026 }
00027 
00028 void errno_error(void* ret_val)
00029 {
00030     if (ret_val == NULL)
00031         pc.printf(" Failure. %d \n", errno);
00032     else
00033         pc.printf(" done.\n");
00034 }
00035 
00036 int main()
00037 {
00038     int error = 0;
00039 
00040 #if defined(DO_FORMAT)
00041     pc.printf("Welcome to the filesystem example.\r\n"
00042     "Formatting... ");
00043     error = FATFileSystem::format(&sd);
00044     return_error(error);
00045 #else
00046     pc.printf("Welcome to the filesystem example.\r\n");
00047 #endif
00048 
00049     pc.printf("Opening a new file, numbers.txt.");
00050     FILE* fd = fopen("/sd/numbers.txt", "w+");
00051     errno_error(fd);
00052 
00053     for (int i = 0; i < 20; i++) {
00054         pc.printf("Writing decimal numbers to a file (%d/20)\r", i);
00055         fprintf(fd, "%d\n", i);
00056     }
00057     pc.printf("Writing decimal numbers to a file (20/20) done.\n");
00058 
00059     pc.printf("Closing file.");
00060     fclose(fd);
00061     pc.printf(" done.\n");
00062 
00063     pc.printf("Re-opening file read-only.");
00064     fd = fopen("/sd/numbers.txt", "r");
00065     errno_error(fd);
00066 
00067     pc.printf("Dumping file to screen.\n");
00068     char buff[16] = {0};
00069     while (!feof(fd)) {
00070         int size = fread(&buff[0], 1, 15, fd);
00071         fwrite(&buff[0], 1, size, stdout);
00072     }
00073     pc.printf("EOF.\n");
00074 
00075     pc.printf("Closing file.");
00076     fclose(fd);
00077     pc.printf(" done.\n");
00078 
00079     pc.printf("Opening root directory.");
00080     DIR* dir = opendir("/sd/");
00081     errno_error(fd);
00082 
00083     struct dirent* de;
00084     pc.printf("Printing all filenames:\n");
00085     while((de = readdir(dir)) != NULL) {
00086         pc.printf("  %s\n", &(de->d_name)[0]);
00087     }
00088 
00089     pc.printf("Closeing root directory. ");
00090     error = closedir(dir);
00091     return_error(error);
00092     pc.printf("Filesystem Demo complete.\n");
00093 
00094     while (true) {}
00095 }