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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>

This fixes machine_pin.c to build against the new pico-sdk coming down the
pipeline, whilst still working with the existing version.

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

Some devices have lower precision than 1ms for time_ns() (eg PYBv1.x has
3.9ms resolution of the RTC) so make the test more lenient for them.
Signed-off-by: Damien George <damien@micropython.org>

With a check for reproducible build date.  Invocation of the test suite is
not needed because it's already run in another job.
Signed-off-by: iTitou <moiandme@gmail.com>

This environment variable, if defined during the build process,
indicates a fixed time that should be used in place of "now" when
such a time is explicitely referenced.

This allows for reproducible builds of micropython.
See https://reproducible-builds.org/specs/source-date-epoch/Signed-off-by: iTitou <moiandme@gmail.com>

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

This should be enabled when the mp_raw_code_save_file function is needed.

It is enabled for mpy-cross, and a check for defined(__APPLE__) is added to
cover Mac M1 systems.

When DEBUG_printf is the standard printf, compilers require the value for
%p to be an actual pointer instead of an integer.

The upip module is frozen into ports supporting it, and it is included in
the source tree, so there is no need to get it from PyPi.  Moreover the
PyPi package referred to is an out-of-date version of upip which is
basically unrelated to our upip.py because the source is taken from a fork
of micropython-lib instead of this repository.

This matches the esp32 port.

Add "make submodules" to commands when building for the first time.
Otherwise, on a first time build, the submodules have not been checked out
and a lot of `fatal error: nrfx.h: No such file or directory` errors are
printed.

Avoids accidentally writing

    freeze("path/to/file.py")

and getting unexpected results.

Using the new tools/verifygitlog.py script.

The main rules enforced are:
- At most 72 characters in the subject line, with a ": " in it.
- At most 75 characters per line in the body.
- No "noreply" email addresses.

This was added a long time ago in 75abee20
when USB host support was added to the stm (now stm32) port, and when this
pyexec code was actually part of the stm port.  It's unlikely to work as
intended anymore.  If it is needed in the future then generic hook macros
can be added in pyexec.

It practically does the same as qstr_from_str and was only used in one
place, which should actually use the compile-time MP_QSTR_XXX form for
consistency; qstr_from_str is for runtime strings only.

If the _IRQ_L2CAP_RECV handler does the actual consumption of the incoming
data (i.e. via l2cap_recvinto), rather than setting a flag for
non-scheduler-context to handle it later, then two things can happen:

- It can starve the VM (i.e. the scheduled task never terminates).  This is
  because calling l2cap_recvinto will empty the rx buffer, which will grant
  more credits to the channel (an HCI command), meaning more data can
  arrive.  This means that the loop in hal_uart.c that keeps reading HCI
  data from the uart and executing NimBLE events as they are created will
  not terminate, preventing other VM code from running.

- There's no flow control (i.e. data will arrive too quickly).  The channel
  shouldn't be given credits until after we return from scheduler context.

It's preferable that no work is done in scheduler/IRQ context.  But to
prevent this being a problem this commit changes l2cap_recvinto so that if
it is called in IRQ context, and the Python handler empties the rx buffer,
then don't grant credits until the Python handler is complete.
Signed-off-by: Jim Mussared <jim.mussared@gmail.com>

Don't clear the IPCC channel flag until we've actually handled the incoming
data, or else the wireless firmware may clobber the IPCC buffer if more
data arrives.  This requires masking the IRQ until the data is handled.
Signed-off-by: Jim Mussared <jim.mussared@gmail.com>

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

This commit adds a new port "rp2" which targets the new Raspberry Pi RP2040
microcontroller.

The build system uses pure cmake (with a small Makefile wrapper for
convenience).  The USB driver is TinyUSB, and there is a machine module
with most of the standard classes implemented.  Some examples are provided
in the examples/rp2/ directory.

Work done in collaboration with Graham Sanderson.
Signed-off-by: Damien George <damien@micropython.org>

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

The pin is configured in open-drain mode so these od_high/od_low methods
should be used.
Signed-off-by: Damien George <damien@micropython.org>

These args are already bounds checked and clipped, and using unsigned ints
can be more efficient.  It also eliminates possible issues and compiler
warnings with shifting of signed integers.
Signed-off-by: Damien George <damien@micropython.org>

Dates/times must be post 2000/1/1 to work correctly with these simple
implementations.
Signed-off-by: Damien George <damien@micropython.org>

So there are no references to undeclared asm_thumb_mov_reg_i16().
Signed-off-by: Damien George <damien@micropython.org>

And make it generic so it can be run on any target.
Signed-off-by: Damien George <damien@micropython.org>

Based on change made by Graham Sanderson.
Signed-off-by: Damien George <damien@micropython.org>

Adds a new compile-time option MICROPY_EMIT_THUMB_ARMV7M which is enabled
by default (to get existing behaviour) and which should be disabled (set to
0) when building native emitter support (@micropython.native) on ARMv6M
targets.

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

This returns a reference to the globals dict associated with the function,
ie the global scope that the function was defined in.  This attribute is
read-only but the dict itself is modifiable, per CPython behaviour.
Signed-off-by: Damien George <damien@micropython.org>