Thank you for your answer.
I omitted to say that I am newbie, so I followed some examples and used the basic fatFS functions to access the drive.
I cannot manage yet to read blocks/sectors or how to do it differently depending on the drive format
Here is a copy of the main app thread:
__NO_RETURN void app_main (void *arg) {
usbStatus usb_status; // USB status
int32_t msc_status; // MSC status
FILE *f; // Pointer to stream object
uint8_t con = 0U; // Connection status of MSC(s)
fsStatus result;
LED_Initialize (); // Initialize LEDs
(void)arg;
usb_status = USBH_Initialize (0U); // Initialize USB Host 0
if (usb_status != usbOK) {
for (;;) {} // Handle USB Host 0 init failure
}
for (;;) {
msc_status = USBH_MSC_DriveGetMediaStatus ("U0:"); // Get MSC device status
if (msc_status == USBH_MSC_OK) {
LED_On (3U); // Switch LED4 on
if (con == 0U) { // If stick was not connected previously
con = 1U; // Stick got connected
msc_status = USBH_MSC_DriveMount ("U0:");
if (msc_status != USBH_MSC_OK) {
continue; // Handle U0: mount failure
}
f = fopen ("Practice-02.txt", "w"); // Open/create file for writing
if (f == NULL) {
continue; // Handle file opening/creation failure
}
fprintf (f, "This is the content of Practice-02.txt");
fclose (f); // Close file
result = fmkdir("DIR1");
if(result!=fsOK) {
continue;
}
f = fopen ("/DIR1/Dir1File.txt", "w"); // Open/create file for writing
if (f == NULL) {
continue; // Handle file opening/creation failure
}
fprintf (f, "This file is supposed to be located at DIR1");
fclose (f);
f = fopen ("/DIR1/SUBDIR1/Dir1Subdir1File.txt", "w"); // Open/create file for writing
if (f == NULL) {
continue; // Handle file opening/creation failure
}
fprintf (f, "This file is supposed to be located inside SUBDIR1");
fclose (f);
result = fmkdir("DIR2");
if(result!=fsOK) {
continue;
}
msc_status = USBH_MSC_DriveUnmount ("U0:");
if (msc_status != USBH_MSC_OK) {
continue; // Handle U0: dismount failure
}
}
} else {
LED_Off (3U); // Switch LED4 on
if (con == 1U) { // If stick was connected previously
con = 0U; // Stick got disconnected
}
}
osDelay(100U);
}
}
