main.cpp

00001 #include "mbed.h"
00002 #include "USBHostMSD.h"
00003 DigitalOut led(LED1);
00004 #include "FATFileSystem.h"
00005 #include <stdlib.h>
00006 
00007 
00008 void msd_task(void const *)
00009 {
00010 
00011     USBHostMSD msd;
00012     int i = 0;
00013     FATFileSystem fs("usb");
00014     int err;
00015     printf("wait for usb memory stick insertion\n");
00016     while(1) {
00017 
00018         // try to connect a MSD device
00019         while(!msd.connect()) {
00020             Thread::wait(500);
00021         }
00022         if (fs.mount(&msd) != 0) {
00023             continue;
00024         } else {
00025             printf("file system mounted\n");
00026         }
00027 
00028         if  (!msd.connect()) {
00029             continue;
00030         }
00031 
00032         // in a loop, append a file
00033         // if the device is disconnected, we try to connect it again
00034 
00035         // append a file
00036         File file;
00037         err = file.open(&fs, "test1.txt", O_WRONLY | O_CREAT |O_APPEND);
00038 
00039         if (err == 0) {
00040             char tmp[100];
00041             sprintf(tmp,"Hello fun USB stick  World: %d!\r\n", i++);
00042             file.write(tmp,strlen(tmp));
00043             sprintf(tmp,"Goodbye World!\r\n");
00044             file.write(tmp,strlen(tmp));
00045             file.close();
00046         } else {
00047             printf("FILE == NULL\r\n");
00048         }
00049         Thread::wait(500);
00050         printf("again\n");
00051         // if device disconnected, try to connect again
00052         while (msd.connected()) {
00053             Thread::wait(500);
00054         }
00055         while (fs.unmount() < 0) {
00056             Thread::wait(500);
00057             printf("unmount\n");
00058         }
00059     }
00060 }
00061 
00062 int main()
00063 {
00064     Thread msdTask(msd_task, NULL, osPriorityNormal, 1024 * 4);
00065 
00066     while(1) {
00067         led=!led;
00068         Thread::wait(500);
00069     }
00070 }