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stmhal: On boot, mount all available partitions of the SD card. 

The first partition is mounted as "/sd" and subsequent partitions are
mounted as "/sd<part_num>".  This is backwards compatible with the previous
behaviour, which just mounted the first partition on "/sd".

At this point, only FatFs filesystems are mounted.
This commit is contained in:
Damien George 2017-01-31 12:18:08 +11:00
parent 326343feeb
commit 3667ee1b88
3 changed files with 83 additions and 48 deletions
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125
stmhal/main.c
View File

@ -261,6 +261,85 @@ MP_NOINLINE STATIC void init_flash_fs(uint reset_mode) {
}
}
STATIC void init_sdcard_fs(bool first_soft_reset) {
bool first_part = true;
for (int part_num = 1; part_num <= 4; ++part_num) {
// create vfs object
fs_user_mount_t *vfs_fat = m_new_obj_maybe(fs_user_mount_t);
mp_vfs_mount_t *vfs = m_new_obj_maybe(mp_vfs_mount_t);
if (vfs == NULL || vfs_fat == NULL) {
break;
}
vfs_fat->str = NULL;
vfs_fat->len = 0;
vfs_fat->flags = FSUSER_FREE_OBJ;
sdcard_init_vfs(vfs_fat, part_num);
// try to mount the partition
FRESULT res = f_mount(&vfs_fat->fatfs);
if (res != FR_OK) {
// couldn't mount
m_del_obj(fs_user_mount_t, vfs_fat);
m_del_obj(mp_vfs_mount_t, vfs);
} else {
// mounted via FatFs, now mount the SD partition in the VFS
if (first_part) {
// the first available partition is traditionally called "sd" for simplicity
vfs->str = "/sd";
vfs->len = 3;
} else {
// subsequent partitions are numbered by their index in the partition table
if (part_num == 2) {
vfs->str = "/sd2";
} else if (part_num == 2) {
vfs->str = "/sd3";
} else {
vfs->str = "/sd4";
}
vfs->len = 4;
}
vfs->obj = MP_OBJ_FROM_PTR(vfs_fat);
vfs->next = NULL;
for (mp_vfs_mount_t **m = &MP_STATE_VM(vfs_mount_table);; m = &(*m)->next) {
if (*m == NULL) {
*m = vfs;
break;
}
}
if (first_part) {
// TODO these should go before the /flash entries in the path
mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR__slash_sd));
mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR__slash_sd_slash_lib));
}
if (first_soft_reset) {
// use SD card as medium for the USB MSD
#if defined(USE_DEVICE_MODE)
pyb_usb_storage_medium = PYB_USB_STORAGE_MEDIUM_SDCARD;
#endif
}
#if defined(USE_DEVICE_MODE)
// only use SD card as current directory if that's what the USB medium is
if (pyb_usb_storage_medium == PYB_USB_STORAGE_MEDIUM_SDCARD)
#endif
{
if (first_part) {
// use SD card as current directory
MP_STATE_PORT(vfs_cur) = vfs;
}
}
first_part = false;
}
}
if (first_part) {
printf("PYB: can't mount SD card\n");
}
}
STATIC uint update_reset_mode(uint reset_mode) {
#if MICROPY_HW_HAS_SWITCH
if (switch_get()) {
@ -478,51 +557,7 @@ soft_reset:
#if MICROPY_HW_HAS_SDCARD
// if an SD card is present then mount it on /sd/
if (sdcard_is_present()) {
// create vfs object
fs_user_mount_t *vfs_fat = m_new_obj_maybe(fs_user_mount_t);
mp_vfs_mount_t *vfs = m_new_obj_maybe(mp_vfs_mount_t);
if (vfs == NULL || vfs_fat == NULL) {
goto no_mem_for_sd;
}
vfs_fat->str = NULL;
vfs_fat->len = 0;
vfs_fat->flags = FSUSER_FREE_OBJ;
sdcard_init_vfs(vfs_fat);
FRESULT res = f_mount(&vfs_fat->fatfs);
if (res != FR_OK) {
printf("PYB: can't mount SD card\n");
m_del_obj(fs_user_mount_t, vfs_fat);
m_del_obj(mp_vfs_mount_t, vfs);
} else {
// mount the sd device after the internal flash
vfs->str = "/sd";
vfs->len = 3;
vfs->obj = MP_OBJ_FROM_PTR(vfs_fat);
vfs->next = NULL;
MP_STATE_VM(vfs_mount_table)->next = vfs;
// TODO these should go before the /flash entries in the path
mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR__slash_sd));
mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR__slash_sd_slash_lib));
if (first_soft_reset) {
// use SD card as medium for the USB MSD
#if defined(USE_DEVICE_MODE)
pyb_usb_storage_medium = PYB_USB_STORAGE_MEDIUM_SDCARD;
#endif
}
#if defined(USE_DEVICE_MODE)
// only use SD card as current directory if that's what the USB medium is
if (pyb_usb_storage_medium == PYB_USB_STORAGE_MEDIUM_SDCARD)
#endif
{
// use SD card as current directory
MP_STATE_PORT(vfs_cur) = vfs;
}
}
no_mem_for_sd:;
init_sdcard_fs(first_soft_reset);
}
#endif

4
stmhal/sdcard.c
View File

@ -443,11 +443,11 @@ const mp_obj_type_t pyb_sdcard_type = {
.locals_dict = (mp_obj_t)&pyb_sdcard_locals_dict,
};
void sdcard_init_vfs(fs_user_mount_t *vfs) {
void sdcard_init_vfs(fs_user_mount_t *vfs, int part) {
vfs->base.type = &mp_fat_vfs_type;
vfs->flags |= FSUSER_NATIVE | FSUSER_HAVE_IOCTL;
vfs->fatfs.drv = vfs;
vfs->fatfs.part = 0; // autodetect partition
vfs->fatfs.part = part;
vfs->readblocks[0] = (mp_obj_t)&pyb_sdcard_readblocks_obj;
vfs->readblocks[1] = (mp_obj_t)&pyb_sdcard_obj;
vfs->readblocks[2] = (mp_obj_t)sdcard_read_blocks; // native version

2
stmhal/sdcard.h
View File

@ -41,4 +41,4 @@ extern const struct _mp_obj_type_t pyb_sdcard_type;
extern const struct _mp_obj_base_t pyb_sdcard_obj;
struct _fs_user_mount_t;
void sdcard_init_vfs(struct _fs_user_mount_t *vfs);
void sdcard_init_vfs(struct _fs_user_mount_t *vfs, int part);