Merge tag 'v1.9.1' into parse-bytecode

Fixes for stmhal USB mass storage, lwIP bindings and VFS regressions

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

4 files changed, 10 insertions, 7 deletions

diff --git a/esp8266/Makefile b/esp8266/Makefile
index a3da9d3986..ff35689f4d 100644
--- a/esp8266/Makefile
+++ b/esp8266/Makefile
@@ -94,7 +94,6 @@ SRC_C = \
 
 STM_SRC_C = $(addprefix stmhal/,\
 	pybstdio.c \
-	input.c \
 	)
 
 EXTMOD_SRC_C = $(addprefix extmod/,\
@@ -233,7 +232,11 @@ axtls: $(BUILD)/libaxtls.a
 
 $(BUILD)/libaxtls.a:
 	cd ../lib/axtls; cp config/upyconfig config/.config
-	cd ../lib/axtls; make oldconfig -B
-	cd ../lib/axtls; make clean
-	cd ../lib/axtls; make all CC="$(CC)" LD="$(LD)" AR="$(AR)" CFLAGS_EXTRA="$(CFLAGS_XTENSA) -Dabort=abort_ -DRT_MAX_PLAIN_LENGTH=1024 -DRT_EXTRA=3072"
+	cd ../lib/axtls; $(MAKE) oldconfig -B
+	cd ../lib/axtls; $(MAKE) clean
+	cd ../lib/axtls; $(MAKE) all CC="$(CC)" LD="$(LD)" AR="$(AR)" CFLAGS_EXTRA="$(CFLAGS_XTENSA) -Dabort=abort_ -DRT_MAX_PLAIN_LENGTH=1024 -DRT_EXTRA=3072"
 	cp ../lib/axtls/_stage/libaxtls.a $@
+
+clean-modules:
+	git clean -f -d modules
+	rm -f build/frozen*.c
diff --git a/esp8266/README.md b/esp8266/README.md
index 897bb47377..d717d26fed 100644
--- a/esp8266/README.md
+++ b/esp8266/README.md
@@ -100,7 +100,7 @@ programming).
 
 __WiFi__
 
-Initally, the device configures itself as a WiFi access point (AP).
+Initially, the device configures itself as a WiFi access point (AP).
 - ESSID: MicroPython-xxxxxx (x’s are replaced with part of the MAC address).
 - Password: micropythoN (note the upper-case N).
 - IP address of the board: 192.168.4.1.
diff --git a/esp8266/machine_rtc.c b/esp8266/machine_rtc.c
index 019b705ba2..b17bcb2616 100644
--- a/esp8266/machine_rtc.c
+++ b/esp8266/machine_rtc.c
@@ -93,7 +93,7 @@ void pyb_rtc_set_us_since_2000(uint64_t nowus) {
     int64_t delta = nowus - (((uint64_t)rtc_last_ticks * cal) >> 12);
 
     // As the calibration value jitters quite a bit, to make the
-    // clock at least somewhat practially usable, we need to store it
+    // clock at least somewhat practically usable, we need to store it
     system_rtc_mem_write(MEM_CAL_ADDR, &cal, sizeof(cal));
     system_rtc_mem_write(MEM_DELTA_ADDR, &delta, sizeof(delta));
 };
diff --git a/esp8266/mpconfigport.h b/esp8266/mpconfigport.h
index c286bdcdd9..483f93d02b 100644
--- a/esp8266/mpconfigport.h
+++ b/esp8266/mpconfigport.h
@@ -39,6 +39,7 @@
 #define MICROPY_PY_BUILTINS_SLICE   (1)
 #define MICROPY_PY_BUILTINS_SLICE_ATTRS (1)
 #define MICROPY_PY_BUILTINS_PROPERTY (1)
+#define MICROPY_PY_BUILTINS_INPUT   (1)
 #define MICROPY_PY_BUILTINS_HELP    (1)
 #define MICROPY_PY_BUILTINS_HELP_TEXT esp_help_text
 #define MICROPY_PY_BUILTINS_HELP_MODULES (1)
@@ -147,7 +148,6 @@ void *esp_native_code_commit(void*, size_t);
 
 // extra built in names to add to the global namespace
 #define MICROPY_PORT_BUILTINS \
-    { MP_OBJ_NEW_QSTR(MP_QSTR_input), (mp_obj_t)&mp_builtin_input_obj }, \
     { MP_OBJ_NEW_QSTR(MP_QSTR_open), (mp_obj_t)&mp_builtin_open_obj },
 
 // extra built in modules to add to the list of known ones