STATIC void mptask_init_sflash_filesystem (void) {
FILINFO fno;
#if _USE_LFN
fno.lfname = NULL;
fno.lfsize = 0;
#endif
// Initialise the local flash filesystem.
// Create it if needed, and mount in on /flash.
// try to mount the flash
FRESULT res = f_mount(sflash_fatfs, "/flash", 1);
if (res == FR_NO_FILESYSTEM) {
// no filesystem, so create a fresh one
res = f_mkfs("/flash", 1, 0);
if (res == FR_OK) {
// success creating fresh LFS
} else {
__fatal_error("failed to create /flash");
}
// create empty main.py
mptask_create_main_py();
} else if (res == FR_OK) {
// mount sucessful
if (FR_OK != f_stat("/flash/main.py", &fno)) {
// create empty main.py
mptask_create_main_py();
}
} else {
__fatal_error("failed to create /flash");
}
// The current directory is used as the boot up directory.
// It is set to the internal flash filesystem by default.
f_chdrive("/flash");
// Make sure we have a /flash/boot.py. Create it if needed.
res = f_stat("/flash/boot.py", &fno);
if (res == FR_OK) {
if (fno.fattrib & AM_DIR) {
// exists as a directory
// TODO handle this case
// see http://elm-chan.org/fsw/ff/img/app2.c for a "rm -rf" implementation
} else {
// exists as a file, good!
}
} else {
// doesn't exist, create fresh file
FIL fp;
f_open(&fp, "/flash/boot.py", FA_WRITE | FA_CREATE_ALWAYS);
UINT n;
f_write(&fp, fresh_boot_py, sizeof(fresh_boot_py) - 1 /* don't count null terminator */, &n);
// TODO check we could write n bytes
f_close(&fp);
}
}
STATIC void mptask_init_sflash_filesystem (void) {
FILINFO fno;
// Initialise the local flash filesystem.
// init the vfs object
fs_user_mount_t *vfs_fat = sflash_vfs_fat;
vfs_fat->flags = 0;
pyb_flash_init_vfs(vfs_fat);
// Create it if needed, and mount in on /flash.
FRESULT res = f_mount(&vfs_fat->fatfs);
if (res == FR_NO_FILESYSTEM) {
// no filesystem, so create a fresh one
uint8_t working_buf[FF_MAX_SS];
res = f_mkfs(&vfs_fat->fatfs, FM_FAT | FM_SFD, 0, working_buf, sizeof(working_buf));
if (res == FR_OK) {
// success creating fresh LFS
} else {
__fatal_error("failed to create /flash");
}
// create empty main.py
mptask_create_main_py();
} else if (res == FR_OK) {
// mount sucessful
if (FR_OK != f_stat(&vfs_fat->fatfs, "/main.py", &fno)) {
// create empty main.py
mptask_create_main_py();
}
} else {
fail:
__fatal_error("failed to create /flash");
}
// mount the flash device (there should be no other devices mounted at this point)
// we allocate this structure on the heap because vfs->next is a root pointer
mp_vfs_mount_t *vfs = m_new_obj_maybe(mp_vfs_mount_t);
if (vfs == NULL) {
goto fail;
}
vfs->str = "/flash";
vfs->len = 6;
vfs->obj = MP_OBJ_FROM_PTR(vfs_fat);
vfs->next = NULL;
MP_STATE_VM(vfs_mount_table) = vfs;
// The current directory is used as the boot up directory.
// It is set to the internal flash filesystem by default.
MP_STATE_PORT(vfs_cur) = vfs;
// create /flash/sys, /flash/lib and /flash/cert if they don't exist
if (FR_OK != f_chdir(&vfs_fat->fatfs, "/sys")) {
f_mkdir(&vfs_fat->fatfs, "/sys");
}
if (FR_OK != f_chdir(&vfs_fat->fatfs, "/lib")) {
f_mkdir(&vfs_fat->fatfs, "/lib");
}
if (FR_OK != f_chdir(&vfs_fat->fatfs, "/cert")) {
f_mkdir(&vfs_fat->fatfs, "/cert");
}
f_chdir(&vfs_fat->fatfs, "/");
// make sure we have a /flash/boot.py. Create it if needed.
res = f_stat(&vfs_fat->fatfs, "/boot.py", &fno);
if (res == FR_OK) {
if (fno.fattrib & AM_DIR) {
// exists as a directory
// TODO handle this case
// see http://elm-chan.org/fsw/ff/img/app2.c for a "rm -rf" implementation
} else {
// exists as a file, good!
}
} else {
// doesn't exist, create fresh file
FIL fp;
f_open(&vfs_fat->fatfs, &fp, "/boot.py", FA_WRITE | FA_CREATE_ALWAYS);
UINT n;
f_write(&fp, fresh_boot_py, sizeof(fresh_boot_py) - 1 /* don't count null terminator */, &n);
// TODO check we could write n bytes
f_close(&fp);
}
}
