Tu Thai / Mbed OS GR-PEACH-mbed-os-storage-access

Sample of using USB memory and SD card on GR-PEACH

Dependencies:   SDBlockDevice_GR_PEACH USBHost_custom

Fork of mbed-os-storage-access by Daiki Kato

main.cpp@1:c1b5260c1491, 2017-03-21 (annotated)

Committer:
dkato
Date:
Tue Mar 21 04:10:37 2017 +0000
Revision:
1:c1b5260c1491
Parent:
0:392df152119c 
Minor change

Who changed what in which revision?

UserRevisionLine numberNew contents of line
dkato 0:392df152119c 1 #include "mbed.h"
dkato 0:392df152119c 2 #include "FATFileSystem.h"
dkato 0:392df152119c 3 #include "SDBlockDevice_GR_PEACH.h"
dkato 0:392df152119c 4 #include "USBHostMSD.h"
dkato 0:392df152119c 5
dkato 0:392df152119c 6 int main() {
dkato 0:392df152119c 7 int i = 0;
dkato 1:c1b5260c1491 8 int storage_type = 0;
dkato 1:c1b5260c1491 9 char storage_str[16];
dkato 0:392df152119c 10
dkato 0:392df152119c 11 FATFileSystem fs("storage");
dkato 0:392df152119c 12 SDBlockDevice_GR_PEACH sd;
dkato 0:392df152119c 13 USBHostMSD usb;
dkato 0:392df152119c 14
dkato 0:392df152119c 15 while(1) {
dkato 0:392df152119c 16 // try to connect a storage device
dkato 0:392df152119c 17 while (1) {
dkato 0:392df152119c 18 if (sd.connect()) {
dkato 1:c1b5260c1491 19 storage_type = 0; // SD
dkato 1:c1b5260c1491 20 strcpy(storage_str, "SD card");
dkato 0:392df152119c 21 fs.mount(&sd);
dkato 0:392df152119c 22 break;
dkato 0:392df152119c 23 }
dkato 0:392df152119c 24 if (usb.connect()) {
dkato 1:c1b5260c1491 25 storage_type = 1; // USB
dkato 1:c1b5260c1491 26 strcpy(storage_str, "USB memory");
dkato 0:392df152119c 27 fs.mount(&usb);
dkato 0:392df152119c 28 break;
dkato 0:392df152119c 29 }
dkato 0:392df152119c 30 Thread::wait(500);
dkato 0:392df152119c 31 }
dkato 0:392df152119c 32
dkato 0:392df152119c 33 // in a loop, append a file
dkato 0:392df152119c 34 // if the device is disconnected, we try to connect it again
dkato 0:392df152119c 35 while(1) {
dkato 0:392df152119c 36 // append a file
dkato 0:392df152119c 37 FILE * fp = fopen("/storage/test1.txt", "a");
dkato 0:392df152119c 38
dkato 0:392df152119c 39 if (fp != NULL) {
dkato 1:c1b5260c1491 40 fprintf(fp, "Hello %s World: %d!\r\n", storage_str, i++);
dkato 0:392df152119c 41 printf("Goodbye World!\r\n");
dkato 0:392df152119c 42 fclose(fp);
dkato 0:392df152119c 43 } else {
dkato 0:392df152119c 44 printf("FILE == NULL\r\n");
dkato 0:392df152119c 45 }
dkato 0:392df152119c 46 Thread::wait(500);
dkato 0:392df152119c 47
dkato 0:392df152119c 48 // if device disconnected, try to connect again
dkato 1:c1b5260c1491 49 if (storage_type == 0) {
dkato 0:392df152119c 50 if (!sd.connected()) break;
dkato 0:392df152119c 51 } else {
dkato 0:392df152119c 52 if (!usb.connected()) break;
dkato 0:392df152119c 53 }
dkato 0:392df152119c 54 }
dkato 1:c1b5260c1491 55 fs.unmount();
dkato 0:392df152119c 56 }
dkato 0:392df152119c 57 }