Merge tag 'v1.8.1' into parse-bytecode

Many ESP8266 improvements, enhanced WebREPL, and support for STM32L4 MCUs

This release brings general improvements and bug fixes, and some new
features.  There is now a uerror module for consistent errno handling
across ports, as well as textual names of OS errors that are printed when
an OSError is raised.  There is support for frozen packages, via both
frozen scripts and frozen bytecode.  WebREPL on the ESP8266 is greatly
improved with many bug fixes and now supports an unlimited (or very large)
number of reconnects.  The os module on the ESP8266 now has rename, chdir,
getcwd and stat.  The unix port now includes the ussl module by default.
The stmhal port has support for STM32L4 MCUs including the STM32L476
Discovery board and the LimiFrog board.

README:
- add explicit note that subdirs contain more READMEs
- add "make deplibs" to quick build section
- "quick build": Use "make axtls" after all

CODECONVENTIONS.md:
- describe git commit messages conventions

py core:
- obj: add warning note about get_array return value and GC blocks
- objstr: binary type of str/bytes for buffer protocol is 'B'
- runtime: properly handle passing user mappings to ** keyword args
- repl: if there're no better alternatives, try to complete "import"
- mpz: fix bug with overflowing C-shift in division routine
- mpz: do Python style division/modulo within bignum divmod routine
- mpz: fix mpn_div so that it doesn't modify memory of denominator
- vstr: vstr_null_terminated_str(): Extend string by at most one byte
- vstr: change allocation policy, +16 to requested size, instead of *2
- add mperrno.h file with uPy defined errno constants
- add uerrno module, with errno constants and dict
- parse: add uerrno to list of modules to look for constants in
- mperrno: add EAFNOSUPPORT definition
- repl: fix handling of backslash in quotes when checking continuation
- gc: gc_dump_alloc_table(): Show byte/str and (byte)array objects
- gc: make (byte)array type dumping conditional on these types being enabled
- gc: use '=' char for tail blocks when dumping heap
- mperrno: add some more MP_Exxx constants, related to networking
- moduerrno: add more constants to the errno module
- add mp_errno_to_str() and use it to provide nicer OSError msgs
- objfloat, py/modmath: ensure M_PI and M_E defined
- emitglue: fix build on AArch64 (ARMv8, etc.) related to loading .mpy files
- objexcept: don't convert errno to str in constructor, do it in print
- moduerrno: add EACCES, pretty common error on Unix
- gc: gc_dump_alloc_table(): dump heap offset instead of actual address
- objstr: make dedicated splitlines function, supporting diff newlines
- objstringio: add TODO comment about avoiding copying on .getvalue()
- modstruct: raise ValueError on unsupported format char
- stream: support both "exact size" and "one underlying call" operations
- declare constant data as properly constant
- stream: add mp_stream_close() helper function
- mphal.h: provide default prototypes for mp_hal_delay_us/mp_hal_ticks_us
- rework frozen modules support to support packages
- objstr: implement str.center()
- allow to stat and import frozen mpy files using new frozen "VFS"
- makeqstrdata.py: allow to have double-quote characters in qstrs
- objnamedtuple: allow passing field names as a tuple
- moduerrno: add EEXIST, EISDIR, ECONNREFUSED
- modstruct: allow to have "0s" in struct format

extmod:
- modlwip: convert errno's to use MP_Exxx symbols
- modlwip: rework how Python accept callback is called
- when including extmod headers, prefix path with extmod/
- modwebsocket: add close() method
- modwebrepl: add close() method
- moduos_dupterm: dumpterm subsystem is responsible for closing stream
- modussl: make more compatible with non-default obj representations
- machine_i2c: redo mp_hal_pin macros to use open_drain and od_low
- virtpin: initial implementation of open-ended C-level Pin interface
- vfs_fat: replace text error messages by POSIX error numbers
- vfs_fat: add chdir() method
- vfs_fat: add getcwd() method
- vfs_fat: add vfs.stat() method
- add machine time_pulse_us function (at C and Python level)
- machine: add MICROPY_PY_MACHINE_PULSE config for time_pulse_us

lib:
- timeutils/timeutils: timeutils_mktime may accept negative time values

drivers:
- cc3000: rename timeval to cc3000_timeval, to avoid clash
- add C-level function to read DHT11 and DHT22 devices
- display/ssd1306: update SSD1306_SPI to work with new API

tools:
- make-frozen.py: properly escape hex chars when making C strings
- make-frozen.py: quick fix to support package-modules
- mpy-tool.py: add checks for critical configuration vars
- make-frozen.py: update for latest changes in frozen modules support
- mpy-tool.py: include .py extension in frozen filename
- mpy-tool.py: don't strip directories from the frozen source name
- upgrade upip to 0.7: SSL cert warning, use uerrno, better usage message

tests:
- run-tests: factor out list of supported external boards
- disable memoryview tests that overflow int conversion
- basics/string_splitlines: reinstate feature test for splitlines
- struct1: add testcase for an unknown type char
- add testcase for str.center()
- extmod/vfs_fat_ramdisk: add testcases for chdir(), getcwd()
- misc/recursive_iternext.py: increase depth N from 1000 to 2000
- misc/recursive_iternext.py: provide more fine-grained selection of N
- pyb/rtc: make RTC test on pyboard more reliable by calling init()

mpy-cross:
- add -s option to specify the embedded source filename

unix port:
- mphalport: add mp_hal_delay_us() for consistency with other ports
- enable uerrno module
- add ability to include frozen bytecode in the build
- mpconfigport_coverage.h: add dedicated config file for coverage build
- unix_mphal: implement mp_hal_ticks_us()
- support frozen packages
- Makefile: nanbox build is not compatible with modussl, disable
- enable "ussl" module
- mpconfigport.mk: document MICROPY_STANDALONE make-level option
- Makefile: "make axtls": automatically fetch submodules if missing

windows port:
- enable multi-processor compilation for msvc

stmhal port:
- l4: adapt DMA to be able to support STM32L4 MCU series
- l4: adapt startup code, clock configuration and interrupts
- l4: make CCM/DTCM RAM start-up conditional on MCU type
- l4: add support for machine.sleep on STM32L4 MCUs
- dma: make DAC DMA descriptors conditional on having a DAC
- add board files for LIMIFROG board
- for LIMIFROG board, add early-init function to get to DFU mode
- dma: fix builds for boards with an F4 or F7 but no DAC
- sdcard: fix initialisation of DMA TX so that writes work
- can: allow to get existing CAN obj if constructed without args
- fix clock configuration for STM32L476-discovery; also add I2C2
- convert to use internal errno symbols; enable uerrno module
- for network drivers, convert to use MP_Exxx errno symbols
- led: allow LEDs to be in PWM mode with TIM1 and channels 1-4
- i2c: expose I2CHandle3 for use by custom C code
- sdcard: allow to do unaligned read-from/write-to SD card
- support frozen packages using .mpy files
- moduos: getcwd(): use mp_obj_new_exception_arg1()
- dac: add DAC deinit() method
- uart: fix wrong baudrate calculation for stm32l4 series

esp8266 port:
- scripts/: remove use of pin.PULL_NONE
- scripts/inisetup: don't start WebREPL on boot in master branch
- scripts/: add fill() to NeoPixel
- scripts/webrepl: add optional password argument to webrepl.start()
- scripts/webrepl: add start_foreground() method
- main: bump heap size to 28K
- mpconfigport: reduce various parser-related allocation params
- help: add "sta_if.active(True)" command
- convert to use new MP_Exxx errno symbols
- enable uerrno module, weak linked also as errno
- change to use internal errno's
- moduos.c: addition of the rename method to module uos
- scripts/port_diag: add network diagnostic output
- scripts/webrepl_setup: show password placeholder char
- scripts/webrepl_setup: add max password length check
- README: add a very first start section
- add APA102 serial individually controllable LEDs support
- enable collections.OrderedDict
- main: update _boot module loading for recent frozen modules refactors
- scripts/port_diag: dump network interface IP settings
- esp_mphal: fix NLR buffer leak in call_dupterm_read()
- esp_mphal: handle Ctrl+C from dupterm (e.g. WebREPL)
- esp_mphal: mp_uos_dupterm_deactivate() may raise exception
- add mp_hal_pin_input() and mp_hal_pin_output() functions
- modpybspi: configure pins when initialising an SPI object
- xtirq: add xtirq.h for controlling xtensa irqs
- ets_alt_task: don't run ets_loop_iter if irqs are disabled
- modmachine: add disable_irq and enable_irq functions
- enable DHT C-level driver
- add dht.py script for high-level control of DHT11/DHT22 sensor
- Makefile: document "disable" value for UART_OS
- modnetwork: scan() is only supported by STA when it's enabled
- modnetwork: protect scan() callback against memory errors
- modnetwork: allow to press ctrl-C while scan() is running
- uart: properly initialise UART0 RXD pin in uart_config
- moduos: add chdir() and getcwd() functions
- scripts/ntptime: allow to override NTP server
- modmachine: add machine.time_pulse_us function
- enable MICROPY_PY_IO_FILEIO to get compliant text/binary streams
- moduos.c: add stat() to the module uos of esp8266
- rtc: set RTC user memory length to 0 on first boot
- provide a dedicated variable to disable ets_loop_iter
- modpybrtc: handle RTC overflow

docs:
- machine.UART: filter out unimplemented UART methods from esp8266 docs
- esp8266/quickref: new way to get MAC address
- esp8266/quickstart: remove i2c examples with stop=False
- ustruct: describe supported type codes
- ussl: add basic description of axTLS-based modussl
- esp8266: Include ussl module in the docs
- machine: make disable_irq and enable_irq docs available for all
- library/machine: add documentation for machine.time_pulse_us
- math, cmath: add port availability information
- library/index: add intro paragraph regarding availability of modules
- README: add some hints for PDF docs generation
- wipy/tutorial: add note about screen key bindings on OS X
- esp8266/quickref: update WebREPL section for 1.8.1 release
- esp8266: fix ESP8266 Network tutorial
- esp8266/quickref: use local image of Adafruit Huzzah board
- esp8266/general: add note about RTC overflow

travis:
- install gcc-arm-none-eabi with --force-yes for now

1 files changed, 143 insertions, 0 deletions

diff --git a/py/mperrno.h b/py/mperrno.h
new file mode 100644
index 0000000000..4d092de452
--- /dev/null
+++ b/py/mperrno.h
@@ -0,0 +1,143 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2016 Damien P. George
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef __MICROPY_INCLUDED_PY_MPERRNO_H__
+#define __MICROPY_INCLUDED_PY_MPERRNO_H__
+
+#if MICROPY_USE_INTERNAL_ERRNO
+
+// MP_Exxx errno's are defined directly as numeric values
+// (Linux constants are used as a reference)
+
+#define MP_EPERM              (1) // Operation not permitted
+#define MP_ENOENT             (2) // No such file or directory
+#define MP_ESRCH              (3) // No such process
+#define MP_EINTR              (4) // Interrupted system call
+#define MP_EIO                (5) // I/O error
+#define MP_ENXIO              (6) // No such device or address
+#define MP_E2BIG              (7) // Argument list too long
+#define MP_ENOEXEC            (8) // Exec format error
+#define MP_EBADF              (9) // Bad file number
+#define MP_ECHILD            (10) // No child processes
+#define MP_EAGAIN            (11) // Try again
+#define MP_ENOMEM            (12) // Out of memory
+#define MP_EACCES            (13) // Permission denied
+#define MP_EFAULT            (14) // Bad address
+#define MP_ENOTBLK           (15) // Block device required
+#define MP_EBUSY             (16) // Device or resource busy
+#define MP_EEXIST            (17) // File exists
+#define MP_EXDEV             (18) // Cross-device link
+#define MP_ENODEV            (19) // No such device
+#define MP_ENOTDIR           (20) // Not a directory
+#define MP_EISDIR            (21) // Is a directory
+#define MP_EINVAL            (22) // Invalid argument
+#define MP_ENFILE            (23) // File table overflow
+#define MP_EMFILE            (24) // Too many open files
+#define MP_ENOTTY            (25) // Not a typewriter
+#define MP_ETXTBSY           (26) // Text file busy
+#define MP_EFBIG             (27) // File too large
+#define MP_ENOSPC            (28) // No space left on device
+#define MP_ESPIPE            (29) // Illegal seek
+#define MP_EROFS             (30) // Read-only file system
+#define MP_EMLINK            (31) // Too many links
+#define MP_EPIPE             (32) // Broken pipe
+#define MP_EDOM              (33) // Math argument out of domain of func
+#define MP_ERANGE            (34) // Math result not representable
+#define MP_EWOULDBLOCK  MP_EAGAIN // Operation would block
+#define MP_EOPNOTSUPP        (95) // Operation not supported on transport endpoint
+#define MP_EAFNOSUPPORT      (97) // Address family not supported by protocol
+#define MP_EADDRINUSE        (98) // Address already in use
+#define MP_ECONNABORTED     (103) // Software caused connection abort
+#define MP_ECONNRESET       (104) // Connection reset by peer
+#define MP_ENOBUFS          (105) // No buffer space available
+#define MP_ENOTCONN         (107) // Transport endpoint is not connected
+#define MP_ETIMEDOUT        (110) // Connection timed out
+#define MP_ECONNREFUSED     (111) // Connection refused
+#define MP_EHOSTUNREACH     (113) // No route to host
+#define MP_EALREADY         (114) // Operation already in progress
+#define MP_EINPROGRESS      (115) // Operation now in progress
+
+#else
+
+// MP_Exxx errno's are defined in terms of system supplied ones
+
+#include <errno.h>
+
+#define MP_EPERM            EPERM
+#define MP_ENOENT           ENOENT
+#define MP_ESRCH            ESRCH
+#define MP_EINTR            EINTR
+#define MP_EIO              EIO
+#define MP_ENXIO            ENXIO
+#define MP_E2BIG            E2BIG
+#define MP_ENOEXEC          ENOEXEC
+#define MP_EBADF            EBADF
+#define MP_ECHILD           ECHILD
+#define MP_EAGAIN           EAGAIN
+#define MP_ENOMEM           ENOMEM
+#define MP_EACCES           EACCES
+#define MP_EFAULT           EFAULT
+#define MP_ENOTBLK          ENOTBLK
+#define MP_EBUSY            EBUSY
+#define MP_EEXIST           EEXIST
+#define MP_EXDEV            EXDEV
+#define MP_ENODEV           ENODEV
+#define MP_ENOTDIR          ENOTDIR
+#define MP_EISDIR           EISDIR
+#define MP_EINVAL           EINVAL
+#define MP_ENFILE           ENFILE
+#define MP_EMFILE           EMFILE
+#define MP_ENOTTY           ENOTTY
+#define MP_ETXTBSY          ETXTBSY
+#define MP_EFBIG            EFBIG
+#define MP_ENOSPC           ENOSPC
+#define MP_ESPIPE           ESPIPE
+#define MP_EROFS            EROFS
+#define MP_EMLINK           EMLINK
+#define MP_EPIPE            EPIPE
+#define MP_EDOM             EDOM
+#define MP_ERANGE           ERANGE
+#define MP_EWOULDBLOCK      EAGAIN
+#define MP_EOPNOTSUPP       EOPNOTSUPP
+#define MP_EAFNOSUPPORT     EAFNOSUPPORT
+#define MP_EADDRINUSE       EADDRINUSE
+#define MP_ECONNABORTED     ECONNABORTED
+#define MP_ECONNRESET       ECONNRESET
+#define MP_ENOBUFS          ENOBUFS
+#define MP_ENOTCONN         ENOTCONN
+#define MP_ETIMEDOUT        ETIMEDOUT
+#define MP_ECONNREFUSED     ECONNREFUSED
+#define MP_EHOSTUNREACH     EHOSTUNREACH
+#define MP_EALREADY         EALREADY
+#define MP_EINPROGRESS      EINPROGRESS
+
+#endif
+
+#if MICROPY_PY_UERRNO
+qstr mp_errno_to_str(mp_obj_t errno_val);
+#endif
+
+#endif // __MICROPY_INCLUDED_PY_MPERRNO_H__