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This class supports SPI bus controller mode, with blocking transfers.

SPI device numbers start at 0, to comply with the pinout of the Teensy
boards.  With the configured clock frequency the fastest baud rate is
33MHz.  For messages longer 16 bytes DMA is used.  The class uses the
existing framework with extmod/machine_spi.c.

Extended driver options:

- drive=n with n being between 1 and 6 or PIN.POWER_1 to PIN.POWER_6.
  Since the pins used by the SPI are fixed, no Pin settings can be made.
  Thus the drive option is added allowing to control ringing and crosstalk
  on the connection.

- gap_ns=nnnnn is the time between sent data items in a frame given in ns.
  Default is 2 clock cycles.

Coverage calculated by Codecov has the same reliability/deterministic
issues as Coveralls did, so the problem is likely to do with the output of
lcov/gcov, rather than the analysis and display of the data.

Switch from lcov to gcov for data generation to try and simplify this
process of computing coverage.
Signed-off-by: Damien George <damien@micropython.org>

As discussed in #7455, Coveralls doesn't work properly anymore, it has
many spurious errors with reduced coverage.
Signed-off-by: Damien George <damien@micropython.org>

When looping, now disable the TX interrupt after calling rmt_write_items()
function to handle change in IDF behaviour (since v4.1).  Also check length
of pulses to ensure it fits hardware limit.

Fixes issue #7403.

This helps the test pass on systems with an inaccurate sleep time.
Signed-off-by: Damien George <damien@micropython.org>

Signed-off-by: Damien George <damien@micropython.org>

The GC now works correctly using asyncify and the functions
emscripten_scan_stack() and emscripten_scan_registers().  Stack/call depth
is monitored via the use of the pystack option.

Fixes issue #6738.
Signed-off-by: Damien George <damien@micropython.org>

Signed-off-by: Damien George <damien@micropython.org>

Only include .c and .cpp files explicitly in the list of files passed to
the preprocessor for QSTR extraction.  All relevant .h files will be
included in this process by "#include" from the .c(pp) files.  In
particular for moduledefs.h, this is included by py/objmodule.c (and
doesn't actually contain any extractable MP_QSTR_xxx, but rather defines
macros with MP_QSTR_xxx's in them which are then part of py/objmodule.c).

The main reason for this change is to simplify the preprocessing step on
the javascript port, which tries to compile .h files as C++ precompiled
headers if they are passed with -E to clang.
Signed-off-by: Damien George <damien@micropython.org>

`mpy-cross` can be compiled to WASM using Emscripten, but it is not happy
unless the stack check is disabled.
Signed-off-by: David Lechner <david@pybricks.com>

This fixes failing builds when the GitHub CI image lags behind Ubuntu
security updates.

Calculating the weekday each time you want to set a date is error prone and
tiresome.  MicroPython can do it on its own - hardware on some ports do not
support storing weekday in hardware and always computes it on the fly,
ignoring the value given to the constructor.

During discussion for #7432 the conclusion was that there seems to be no
obvious reason to let user set the weekday to an incorrect value so it
makes sense to just ignore the provided weekday value and always compute
the correct value.  This patch introduces this change for the rp2 port.
Signed-off-by: Krzysztof Adamski <k@japko.eu>

The RTC in rp2 can store any, even wrong, number as a weekday in RTC.  It
was, however, discussed in #7394 that we would like to unify all ports and
use 0 as Monday, not Sunday in the machine.RTC implementation.

This patch makes sure that the default date set in RTC is adheres to this
convention.  It also fixes the example in quickref to use proper weekday to
avoid confusion.
Signed-off-by: Krzysztof Adamski <k@japko.eu>

This function may be useful for other ports as well so lets move it to
timeutils so it can be reused.
Signed-off-by: Krzysztof Adamski <k@japko.eu>

This is useful when binding asynchronous functions in C.
Signed-off-by: David Lechner <david@pybricks.com>

Add an optional 'lock' kwarg to callback that locks GC and scheduler.  This
allows the callback to be invoked asynchronously in 'interrupt context',
for example as a signal handler.

Also add the 'cfun' member function to callback, that allows retrieving the
C callback function address.  This is needed when the callback should be
set to a struct field.

See related #7373.
Signed-off-by: Amir Gonnen <amirgonnen@gmail.com>

Fixes the following (the line numbers match commit 0e87459e):

../../extmod/crypto-algorithms/sha256.c:49:19: runtime error: left shif...
../../extmod/moduasyncio.c:106:35: runtime error: member access within ...
../../py/binary.c:210:13: runtime error: left shift of negative value -...
../../py/mpz.c:744:16: runtime error: negation of -9223372036854775808 ...
../../py/objint.c:109:22: runtime error: left shift of 1 by 31 places c...
../../py/objint_mpz.c:374:9: runtime error: left shift of 4611686018427...
../../py/objint_mpz.c:374:9: runtime error: left shift of negative valu...
../../py/parsenum.c:106:14: runtime error: left shift of 46116860184273...
../../py/runtime.c:395:33: runtime error: left shift of negative value ...
../../py/showbc.c:177:28: runtime error: left shift of negative value -...
../../py/vm.c:321:36: runtime error: left shift of negative value -1```

Testing was done on an amd64 Debian Buster system using gcc-8.3 and these
settings:

    CFLAGS += -g3 -Og -fsanitize=undefined
    LDFLAGS += -fsanitize=undefined

The introduced TASK_PAIRHEAP macro's conditional (x ? &x->i : NULL)
assembles (under amd64 gcc 8.3 -Os) to the same as &x->i, since i is the
initial field of the struct.  However, for the purposes of undefined
behavior analysis the conditional is needed.
Signed-off-by: Jeff Epler <jepler@gmail.com>

This is necessary when building a custom out-of-tree board.
Signed-off-by: Damien George <damien@micropython.org>

The tools/autobuild/ scripts replace this.
Signed-off-by: Damien George <damien@micropython.org>

Signed-off-by: Damien George <damien@micropython.org>

Following how other .irq() methods work on other objects.
Signed-off-by: Damien George <damien@micropython.org>

Otherwise it can easily lead to a hard crash.
Signed-off-by: Damien George <damien@micropython.org>

Signed-off-by: Damien George <damien@micropython.org>

It reschedules the BT HCI poll soft timer so that it is called exactly when
the next timer expires.
Signed-off-by: Damien George <damien@micropython.org>

Instead of using systick the BT subsystem is now scheduled using a soft
timer.  This means it is scheduled only when it is enabled.
Signed-off-by: Damien George <damien@micropython.org>

And call mp_pairheap_init_node() in soft_timer_static_init() so that
reinsert can be called after static_init.
Signed-off-by: Damien George <damien@micropython.org>

Signed-off-by: mishafarms <github@mishafarms.us>

This is to provide a summary of the licenses used by MicroPython.

- Add SPDX identifier for every directory that includes
  non-MIT-licensed content.
- Add brief summary.
- Update docs license to be more explicit.
Signed-off-by: Jim Mussared <jim.mussared@gmail.com>

Dynamically generate/loaded native code (eg from @micropython.native or
native .mpy files) needs to be able allocate from IRAM, and the memory
protection feature must be disabled for that to work.  Disabling it is
needed to get native code working on ESP32-S2 and -C3.
Signed-off-by: Damien George <damien@micropython.org>

This introduces a new macro to get the main thread and uses it to ensure
that asynchronous exceptions such as KeyboardInterrupt (CTRL+C) are only
scheduled on the main thread. This is more deterministic than being
scheduled on a random thread and is more in line with CPython that only
allow signal handlers to run on the main thread.

Fixes issue #7026.
Signed-off-by: David Lechner <david@pybricks.com>

This moves mp_pending_exception from mp_state_vm_t to mp_state_thread_t.
This allows exceptions to be scheduled on a specific thread.
Signed-off-by: David Lechner <david@pybricks.com>

Signed-off-by: Damien George <damien@micropython.org>

2.5 can be represented correctly in object representation C, but 2.3 cannot
(it is slightly truncated).
Signed-off-by: Damien George <damien@micropython.org>

It's not supported on older GCC versions.
Signed-off-by: Damien George <damien@micropython.org>

Commit 0abf6f83 removed _boot.py from the
manifest for the GENERIC_512K board because the build does not include a
filesystem.  But the main code expects _boot.py to be there and prints an
error if it's not.  So add a custom _boot.py, which just sets the
gc.threshold().
Signed-off-by: Damien George <damien@micropython.org>

Fixes issue #7352.
Signed-off-by: Damien George <damien@micropython.org>

The 72x40 OLED requires selecting the internal IREF, as opposed to the
default external IREF.  This is an undocumented feature in the SSD1306
datasheet, but is present in the SSD1315 datasheet.  It's possible the
72x40 OLED is actually using the newer SSD1315 controller.  Sending the
IREF select command to SSD1306 displays has no effect on them, so it's
added to the init_display() instead of wrapping in an "if width = 72".

Also tested on a 128x64 OLED using the SSD1315 controller (smaller ribbon
cable) and the proposed change has no effect on the display, as the module
comes with the correct current limiting resistor.  Internal and external
IREF work the same.

Fixes issue #7281.

Make the hardware SPI initializer method match the `init()` method by 
allowing `None` to be given for `sck`/`mosi`/`miso` to specify an unused 
signal.

This adds a wlan.config(reconnects=N) option to set the number of reconnect
attempts that will be made if the WLAN connection goes down.  The default
is N=-1 (infinite retries, current behavior).  Setting
wlan.config(reconnects=0) will disable the reconnect attempts.

A nice side effect of reconnects=0 is that wlan.status() will report the
disconnect reason now.  See related issue #5326.