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Updates the Zephyr port build instructions and CI to use the latest
Zephyr release tag.
Signed-off-by: Maureen Helm <maureen.helm@intel.com>

CONFIG_USB was removed in Zephyr v2.7.0 after some Kconfig rework that
made it sufficient to use CONFIG_USB_DEVICE_STACK only.
Signed-off-by: Maureen Helm <maureen.helm@intel.com>

Updates the Zephyr port to get the UART console device from devicetree
instead of Kconfig. The Kconfig option CONFIG_UART_CONSOLE_ON_DEV_NAME
was removed in Zephyr v2.7.0.
Signed-off-by: Maureen Helm <maureen.helm@intel.com>

The reboot header was moved to a different path in Zephyr v2.6.0. The
old path was deprecated for two releases (v2.6.0 and v2.7.0) and will no
longer be supported after Zephyr v2.7.0.
Signed-off-by: Maureen Helm <maureen.helm@intel.com>

As a prerequisite to upgrading to Zephyr v2.7.0, upgrade the minimum
CMake version required for the Zephyr port to 3.20.0.
Signed-off-by: Maureen Helm <maureen.helm@intel.com>

As a prerequisite to upgrading to Zephyr v2.7.0, upgrade CI to use
Zephyr docker image v0.21.0. In particular, this is needed to pick up a
newer CMake version because Zephyr v2.7.0 increased the minimum CMake
version required to 3.20.0.
Signed-off-by: Maureen Helm <maureen.helm@intel.com>

The duty is saved and set whenever the frequency is changed, unless the
duty rate was not set yet.

The top value was off by 1: in order to count n ticks it has to be set to
n-1.

Fixes issue #8122.

After changing the bitstream implementation to use the RMT driver in
commit 72d86158121e32bbabaeade08f449d507bf40f9a
("esp32/machine_bitstream.c: Replace with RMT-based driver."), using
multiple `Neopixel` instances shows signal duplication between the
instances (i.e. a `write()` on one instance is written to all instances).

On invocation, the rmt driver configures the GPIO matrix to route the
output signal to the respective GPIO pin.  When called for a different
`NeoPixel` instance using a different pin, the new route is established,
but the old route still exists.  Now, the RMT output signal is sent to both
pins.

Fix this by setting the standard GPIO output function for the current pin
after uninstalling the RMT driver.
Signed-off-by: Simon Baatz <gmbnomis@gmail.com>

- Add default values for I2S features added in ESP-IDF 4.4.
- Add workaround for bug introduced in ESP-IDF 4.4
  (https://github.com/espressif/esp-idf/issues/8121).

- Cleanup pyexec flags definitions so it's clear they are different.
- Use mp_uint_t for exec_flags because it should be unsigned.

The qstr_last_chunk is not collected by the garbage collector.  This relies
on the assertion that qstr_pool_t also references the qstr_last_chunk.  If
an exception is raised while allocating the qstr_pool_t, qstr_last_chunk
has to be invalidated not to become a dangling reference at the next
garbage collection.
Signed-off-by: Emilie Feral <emilie.feral@numworks.com>

And how they relate to MicroPython.  As these features are implemented (or
the decision is made to not implement them) the tables can be updated to
document the differences between MicroPython and standard Python.

Via the MICROPY_HW_FLASH_DQS flag.

This makes sure changes from previous related commits actually work.

This is the same fix as applied in uselect_poll_basic.py.

The application isn't necessarily called 'micropython' especially
not When using variants, i.e. the tests need to be ran using $(PROG).

Following the unix port.

Support for building variants with msvc was done by @stinos.

Because the GENERIC board won't fit in the flash defined by esp8266_ota.ld.
Signed-off-by: Damien George <damien@micropython.org>

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

Commit 4dba04a5 refactored the network code
but the combination of MICROPY_PY_WIZNET5K=5500 and MICROPY_PY_LWIP=1
broke.

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

In commit 86ce4426 the '.frozen' entry was
added at the start of sys.path, to allow control over when frozen modules
are searched during import, and retain existing behaviour whereby frozen
was searched before the filesystem.

But Python semantics of sys.path require sys.path[0] to be the directory of
the currently executing script, or ''.

This commit moves the '.frozen' entry to second place in sys.path, so
sys.path[0] retains its correct value (described above).
Signed-off-by: Damien George <damien@micropython.org>

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

Fixes issue #7480

This allows the remote MicroPython instance to create and delete
directories from the mounted host filesystem in addition to the already
existing functionality of reading, creating, and modifying files.
Signed-off-by: Michael Bentley <mikebentley15@gmail.com>

This aims to solve glitching issues on long neopixel strips.
Signed-off-by: Jim Mussared <jim.mussared@gmail.com>

Save and restore the same duty cycle when the frequency (or frequency
resolution) is changed.  This allows a smooth frequency change.

Also update the esp32 PWM quickref to be clearer.

To improve coverage of mpz_cmp and mpn_cmp.
Signed-off-by: Damien George <damien@micropython.org>

This commit makes sure that the value zero is always encoded in an mpz_t as
neg=0 and len=0 (previously it was just len=0).

This invariant is needed for some of the bitwise operations that operate on
negative numbers, because they cannot handle -0.  For example
(-((1<<100)-(1<<100)))|1 was being computed as -65535, instead of 1.

Fixes issue #8042.
Signed-off-by: Damien George <damien@micropython.org>

These removed ones are either unused by MicroPython or provided by osapi.h
in the SDK.  In particular ets_delay_us() has different signatures for
different versions of the SDK, so best to let it provide the declaration.

Fixes issue #8095.
Signed-off-by: Damien George <damien@micropython.org>

Appears incorrectly as E407 in the download manager.

If ADCx pins are hidden, print an empty table to prevent linker errors.

The vfs flags could have any random value from stack.  This bug was
introduced back in 7723dac3

The mp_sys_path_obj and mp_sys_argv_obj objects are only used by the
runtime and accessible from Python if MICROPY_PY_SYS is enabled.  So
exclude them from the runtime state if this option is disabled.
Signed-off-by: Damien George <damien@micropython.org>