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circuitpy_mpconfig: Disable flash multi-partition 

This adds some additional code in mkfs which doesn't seem necessary, and
Disabling it saves 172 bytes flash.

Testing performed: Using a Feather M0 Adalogger, checked that
 * an sdcard could still be mounted (using adafruit_sdcard)
 * os.listdir() of "/" and "/sd" worked
 * CIRCUITPY still mounted
This commit is contained in:
Jeff Epler 2021-03-07 09:20:50 -06:00
parent d2056a46ee
commit 156ee4833a
2 changed files with 3 additions and 1 deletions
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2
py/circuitpy_mpconfig.h
View File

@ -132,7 +132,7 @@
#define MICROPY_FATFS_LFN_CODE_PAGE (437)
#define MICROPY_FATFS_USE_LABEL (1)
#define MICROPY_FATFS_RPATH (2)
#define MICROPY_FATFS_MULTI_PARTITION (1)
#define MICROPY_FATFS_MULTI_PARTITION (0)
// Only enable this if you really need it. It allocates a byte cache of this size.
// #define MICROPY_FATFS_MAX_SS (4096)

2
supervisor/shared/flash.c
View File

@ -213,7 +213,9 @@ void supervisor_flash_init_vfs(fs_user_mount_t *vfs) {
vfs->base.type = &mp_fat_vfs_type;
vfs->flags |= FSUSER_NATIVE | FSUSER_HAVE_IOCTL;
vfs->fatfs.drv = vfs;
#if MICROPY_FATFS_MULTI_PARTITION
vfs->fatfs.part = 1; // flash filesystem lives on first partition
#endif
vfs->readblocks[0] = (mp_obj_t)&supervisor_flash_obj_readblocks_obj;
vfs->readblocks[1] = (mp_obj_t)&supervisor_flash_obj;
vfs->readblocks[2] = (mp_obj_t)flash_read_blocks; // native version