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This commit adds support for building the esp32 port with cmake, and in
particular it builds MicroPython as a component within the ESP-IDF.  Using
cmake and the ESP-IDF build infrastructure makes it much easier to maintain
the port, especially with the various new ESP32 MCUs and their required
toolchains.
Signed-off-by: Damien George <damien@micropython.org>

These allow a port to use cmake natively instead of make.
Signed-off-by: Damien George <damien@micropython.org>

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

This allows changing the baudrate of the UART without reinitialising it
(reinitialising can lead to spurious characters sent on the TX line).
Signed-off-by: Damien George <damien@micropython.org>

Matches CPython behavior.

Fixes #6686

Signed-off-by: Brianna Laugher <brianna.laugher@gmail.com>

This is needed for TinyUSB to process USB device IRQs.

Related to #6325.
Signed-off-by: Damien George <damien@micropython.org>

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

On i.MX the SysTick IRQ cannot wake the CPU from a WFI so the CPU was
blocked on WFI waiting for USB data in mp_hal_stdin_rx_chr() even though it
had already arrived (because it may arrive just after calling the check
tud_cdc_available()).  This commit fixes this problem by using SEV/WFE to
indicate that there has been a USB event.

The mp_hal_stdout_tx_strn() function is also fixed so that it doesn't
overflow the USB buffers.
Signed-off-by: Damien George <damien@micropython.org>

So that all MicroPython ports that use tinyusb use the same version.  Also
requires fewer submodule checkouts when building rp2 along with other ports
that use tinyusb.
Signed-off-by: Damien George <damien@micropython.org>

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

Includes support for RP2040.
Signed-off-by: Damien George <damien@micropython.org>

Synchronous events work on stm32 and unix ports.
Signed-off-by: Damien George <damien@micropython.org>

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

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

So that BTSTACK can be enabled with SYNC_EVENTS.
Signed-off-by: Damien George <damien@micropython.org>

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

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

START_SEC was changed in e0905e85.

Also, update the error message to mention how to format the partition at
the REPL, and make the total message shorter to save a bit of flash.
Signed-off-by: Damien George <damien@micropython.org>

For certain operands to mpn_div, the existing code path for
`DIG_SIZE == MPZ_DBL_DIG_SIZE / 2` had a bug in it where borrow could still
overflow in the `(x >= *n || *n - x <= borrow)` branch, ie
`borrow + x - (mpz_dbl_dig_t)*n` overflows the borrow variable.  In such
cases the subsequent right-shift of borrow would not bring in the overflow
bit, leading to an error in the result.  An example division that had
overflow when MPZ_DIG_SIZE = 16 is `(2 ** 48 - 1) ** 2 // (2 ** 48 - 1)`.

This is fixed in this commit by simplifying the code and handling the low
digits of borrow first, and then the upper bits (to shift down) separately.
There is no longer a distinction between `DIG_SIZE < MPZ_DBL_DIG_SIZE / 2`
and `DIG_SIZE == MPZ_DBL_DIG_SIZE / 2`.

This commit also simplifies the second part of the calculation so that
borrow does not need to be negated (instead the code just works knowing
that borrow is negative and using + instead of - in calculations involving
borrow).

Fixes #6777.
Signed-off-by: Damien George <damien@micropython.org>

No std-int types are used in gc.h, but size_t is which needs stddef.h.
Signed-off-by: Damien George <damien@micropython.org>

In particular the firmware can now be built in a build directory that lives
outside the source tree, and the py/modarray.c file will still be found.

See issue #6837.
Signed-off-by: Damien George <damien@micropython.org>

To make it clear it is for mp_obj_t/mp_uint_t "word" types, and to prefix
this macro with MP_.
Signed-off-by: Damien George <damien@micropython.org>

The "word" referred to by BYTES_PER_WORD is actually the size of mp_obj_t
which is not always the same as the size of a pointer on the target
architecture.  So rename this config value to better reflect what it
measures, and also prefix it with MP_.

For uses of BYTES_PER_WORD in setting the stack limit this has been
changed to sizeof(void *), because the stack usually grows with
machine-word sized values (eg an nlr_buf_t has many machine words in it).
Signed-off-by: Damien George <damien@micropython.org>

To give this macro a standard MP_ prefix.
Signed-off-by: Damien George <damien@micropython.org>

It's only used in one location, to test if << or >> will overflow when
shifting mp_uint_t.  For such a test it's clearer to use sizeof(lhs_val),
which will be valid even if the type of lhs_val changes.
Signed-off-by: Damien George <damien@micropython.org>

To simplify config, there's no need to specify MP_PLAT_PRINT_STRN if it's
the same as the default definition in py/mpconfig.h.
Signed-off-by: Damien George <damien@micropython.org>

Because gc.h doesn't reference any symbol from these header files.
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>

Otherwise it resets the ADC peripheral each time a new ADC object is
constructed, which can reset other state that has already been set up.

See issue #6833.
Signed-off-by: Damien George <damien@micropython.org>

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

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

Added functions in the machine module are:
- unique_id (returns 8 bytes)
- soft_reset
- idle
- lightsleep, deepsleep (not power saving at the moment)
- disable_irq, enable_irq
- time_pulse_us
Signed-off-by: Damien George <damien@micropython.org>

Default to just calling python since that is most commonly available: the
official installer or zipfiles from python.org, anaconda, nupkg all result
in python being available but not python3.  In other words: the default
used so far is wrong.  Note that os.name is 'posix' when running the python
version which comes with Cygwin or MSys2 so they are not affected by this.
However of all possible ways to get Python on Windows, only Cygwin provides
no python command so update the default way for running tests in the
README.

With mboot encrpytion and fsload enabled, the DEBUG build -O0 compiler
settings result in mboot no longer fitting in the 32k sector.  This commit
changes this to -Og which also brings it into line with the regular stm32
build.

MCUs with device-only USB peripherals (eg L0, WB) do not implement (at
least not in the ST HAL) the HAL_PCD_DisconnectCallback event.  So if a USB
cable is disconnected the USB driver does not deinitialise itself
(usbd_cdc_deinit is not called) and the CDC driver can stay in the
USBD_CDC_CONNECT_STATE_CONNECTED state.  Then if the USB was attached to
the REPL, output can become very slow waiting in usbd_cdc_tx_always for
500ms for each character.

The disconnect event is not implemented on these MCUs but the suspend event
is.  And in the situation where the USB cable is disconnected the suspend
event is raised because SOF packets are no longer received.

The issue of very slow output on these MCUs is fixed in this commit (really
worked around) by adding a check in usbd_cdc_tx_always to see if the USB
device state is suspended, and, if so, breaking out of the 500ms wait loop.
This should also help all MCUs for a real USB suspend.

A proper fix for MCUs with device-only USB would be to implement or somehow
synthesise the HAL_PCD_DisconnectCallback event.

See issue #6672.
Signed-off-by: Damien George <damien@micropython.org>

This was adapted from the `pio/uart_rx` example from the `pico-examples`
repository:
https://github.com/raspberrypi/pico-examples/blob/master/pio/uart_rx/uart_rx.pio

It demonstrates the `jmp_pin` feature in action.
Signed-off-by: Tim Radvan <tim@tjvr.org>

PIO state machines can make a conditional jump on the state of a pin: the
`JMP PIN` command.  This requires the pin to be configured with
`sm_config_set_jmp_pin`, but until now we didn't have a way of doing that
in MicroPython.

This commit adds a new `jmp_pin=None` argument to `StateMachine`.  If it is
not `None` then we try to interpret it as a Pin, and pass its value to
`sm_config_set_jmp_pin`.
Signed-off-by: Tim Radvan <tim@tjvr.org>

In particular it fixes GPIO19 so that it can be used as an output.
Signed-off-by: Damien George <damien@micropython.org>