原创 micropython升级到了 1.9.1

micropython升级到了 1.9.1，主要改进有：

v1.9.1 修复了 stm32 的 USB 存储, lwIP 绑定和 VFS 问题

This release provides an important fix for the USB mass storage device in

the stmhal port by implementing the SCSI SYNCHRONIZE_CACHE command, which

is now require by some Operating Systems.  There are also fixes for the

lwIP bindings to improve non-blocking sockets and error codes.  The VFS has

some regressions fixed including the ability to statvfs the root.



All changes are listed below.



py core:

- modbuiltins: add core-provided version of input() function

- objstr: catch case of negative "maxsplit" arg to str.rsplit()

- persistentcode: allow to compile with complex numbers disabled

- objstr: allow to compile with obj-repr D, and unicode disabled

- modsys: allow to compile with obj-repr D and PY_ATTRTUPLE disabled

- provide mp_decode_uint_skip() to help reduce stack usage

- makeqstrdefs.py: make script run correctly with Python 2.6

- objstringio: if created from immutable object, follow copy on write policy



extmod:

- modlwip: connect: for non-blocking mode, return EINPROGRESS

- modlwip: fix error codes for duplicate calls to connect()

- modlwip: accept: fix error code for non-blocking mode

- vfs: allow to statvfs the root directory

- vfs: allow "buffering" and "encoding" args to VFS's open()

- modframebuf: fix signed/unsigned comparison pendantic warning



lib:

- libm: use isfinite instead of finitef, for C99 compatibility

- utils/interrupt_char: remove support for KBD_EXCEPTION disabled



tests:

- basics/string_rsplit: add tests for negative "maxsplit" argument

- float: convert "sys.exit()" to "raise SystemExit"

- float/builtin_float_minmax: PEP8 fixes

- basics: convert "sys.exit()" to "raise SystemExit"

- convert remaining "sys.exit()" to "raise SystemExit"



unix port:

- convert to use core-provided version of built-in import()

- Makefile: replace references to make with $(MAKE)



windows port:

- convert to use core-provided version of built-in import()



qemu-arm port:

- Makefile: adjust object-file lists to get correct dependencies

- enable micropython.mem_*() functions to allow more tests



stmhal port:

- boards: enable DAC for NUCLEO_F767ZI board

- add support for NUCLEO_F446RE board

- pass USB handler as parameter to allow more than one USB handler

- usb: use local USB handler variable in Start-of-Frame handler

- usb: make state for USB device private to top-level USB driver

- usbdev: for MSC implement SCSI SYNCHRONIZE_CACHE command

- convert from using stmhal's input() to core provided version



cc3200 port:

- convert from using stmhal's input() to core provided version



teensy port:

- convert from using stmhal's input() to core provided version



esp8266 port:

- Makefile: replace references to make with $(MAKE)

- Makefile: add clean-modules target

- convert from using stmhal's input() to core provided version



zephyr port:

- modusocket: getaddrinfo: Fix mp_obj_len() usage

- define MICROPY_PY_SYS_PLATFORM (to "zephyr")

- machine_pin: use native Zephyr types for Zephyr API calls



docs:

- machine.Pin: remove out_value() method

- machine.Pin: add on() and off() methods

- esp8266: consistently replace Pin.high/low methods with .on/off

- esp8266/quickref: polish Pin.on()/off() examples

- network: move confusingly-named cc3200 Server class to its reference

- uos: deconditionalize, remove minor port-specific details

- uos: move cc3200 port legacy VFS mounting functions to its ref doc

- machine: sort machine classes in logical order, not alphabetically

- network: first step to describe standard network class interface



examples:

- embedding: use core-provided KeyboardInterrupt object

http://micropython.org/resources/micropython-ChangeLog.txt