micropython/ports/esp8266/modules/_boot.py

import gc
gc.threshold((gc.mem_free() + gc.mem_alloc()) // 4)
import uos
from flashbdev import bdev

if bdev:
    try:
        uos.mount(bdev, '/')
    except:
        import inisetup
        inisetup.setup()

gc.collect()
esp8266: Explicitly collect garbage in bootstrap scripts. Leads to less fragmentation at teh time user code starts. 2016-07-03 00:20:13 +08:00			`import gc`
esp8266/_boot.py: Decrease GC alloc threshold to quarter of heap size. The idea behind decrease is: bytecode and other static data is also kept on heap, and can easily become half of heap, then setting threshold to half of heap will have null effect - GC will happen on complete heap exhaustion like before. But exactly in such config maintaining heap defragmented is very important, so lower threshold to accommodate that. 2016-07-23 18:56:24 +08:00			`gc.threshold((gc.mem_free() + gc.mem_alloc()) // 4)`
esp8266: Add Python modules for initial configuration. Main entry point is _boot.py which checks whether FAT FS in flash mountable, and if so, mounts it. Otherwise, it checks if flash is empty, and if so, performs initial module setup: makes FAT FS, configures default AP name, etc. As a last option, if flash is not empty, and could not be mounted, it means filesystem corruption, and warning message with instructions is printed in an infinite loop. 2016-04-12 05:37:04 +08:00			`import uos`
			`from flashbdev import bdev`

esp8266/modules: Fix AttributeError in _boot.py if flash not formatted. Prior to this commit, if the flash filesystem was not formatted then it would error: "AttributeError: 'FlashBdev' object has no attribute 'mount'". That is due to it not being able to detect the filesystem on the block device and just trying to mount the block device directly. This commit fixes the issue by just catching all exceptions. Also it's not needed to try the mount if `flashbdev.bdev` is None. 2020-01-09 23:33:31 +08:00			`if bdev:`
			`try:`
esp8266: Change default settings to mount flash at root dir. 2017-03-10 14:14:21 +08:00			`uos.mount(bdev, '/')`
esp8266/modules: Fix AttributeError in _boot.py if flash not formatted. Prior to this commit, if the flash filesystem was not formatted then it would error: "AttributeError: 'FlashBdev' object has no attribute 'mount'". That is due to it not being able to detect the filesystem on the block device and just trying to mount the block device directly. This commit fixes the issue by just catching all exceptions. Also it's not needed to try the mount if `flashbdev.bdev` is None. 2020-01-09 23:33:31 +08:00			`except:`
			`import inisetup`
			`inisetup.setup()`
esp8266: Explicitly collect garbage in bootstrap scripts. Leads to less fragmentation at teh time user code starts. 2016-07-03 00:20:13 +08:00
			`gc.collect()`