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samples: usb: mass: do application configuration before usb starts

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USB access to the flash device is not synchronized with the
application, so if the application needs to create a new file system
USB may read configuration state that is incorrect.  Wait until the
the application is done with the flash before starting USB.

Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
This commit is contained in:
Peter Bigot 2020-06-22 06:18:03 -05:00 committed by Anas Nashif
parent e2b72a0ede
commit 5ea2eaa765
1 changed files with 16 additions and 11 deletions
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27
samples/subsys/usb/mass/src/main.c
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@ -45,18 +45,8 @@ static struct fs_mount_t fs_mnt = {
#endif /* file system */
#endif /* CONFIG_DISK_ACCESS_FLASH */
void main(void)
static void setup_disk(void)
{
int ret;
ret = usb_enable(NULL);
if (ret != 0) {
LOG_ERR("Failed to enable USB");
return;
}
LOG_INF("The device is put in USB mass storage mode.\n");
#if CONFIG_DISK_ACCESS_FLASH
struct fs_mount_t *mp = &fs_mnt;
unsigned int id = (uintptr_t)mp->storage_dev;
@ -125,3 +115,18 @@ out:
flash_area_close(pfa);
#endif
}
void main(void)
{
int ret;
setup_disk();
ret = usb_enable(NULL);
if (ret != 0) {
LOG_ERR("Failed to enable USB");
return;
}
LOG_INF("The device is put in USB mass storage mode.\n");
}