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tiijay
2025-10-19 18:29:10 +02:00
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"""
Access and control MicroPython internals.
MicroPython module: https://docs.micropython.org/en/v1.26.0/library/micropython.html
---
Module: 'micropython' on micropython-v1.26.0-rp2-RPI_PICO
"""
# MCU: {'mpy': 'v6.3', 'build': '', 'ver': '1.26.0', 'arch': 'armv6m', 'version': '1.26.0', 'port': 'rp2', 'board': 'RPI_PICO', 'family': 'micropython', 'board_id': 'RPI_PICO', 'variant': '', 'cpu': 'RP2040'}
# Stubber: v1.26.0
from __future__ import annotations
from _typeshed import Incomplete
from _mpy_shed import mp_available
from typing import Any, Callable, Optional, Tuple, overload
from typing_extensions import Awaitable, ParamSpec, TypeAlias, TypeVar
_T = TypeVar("_T")
_F = TypeVar("_F", bound=Callable[..., Any])
Const_T = TypeVar("Const_T", int, float, str, bytes, Tuple)
_Param = ParamSpec("_Param")
_Ret = TypeVar("_Ret")
@overload
def opt_level() -> int:
"""
If *level* is given then this function sets the optimisation level for subsequent
compilation of scripts, and returns ``None``. Otherwise it returns the current
optimisation level.
The optimisation level controls the following compilation features:
- Assertions: at level 0 assertion statements are enabled and compiled into the
bytecode; at levels 1 and higher assertions are not compiled.
- Built-in ``__debug__`` variable: at level 0 this variable expands to ``True``;
at levels 1 and higher it expands to ``False``.
- Source-code line numbers: at levels 0, 1 and 2 source-code line number are
stored along with the bytecode so that exceptions can report the line number
they occurred at; at levels 3 and higher line numbers are not stored.
The default optimisation level is usually level 0.
"""
@overload
def opt_level(level: int, /) -> None:
"""
If *level* is given then this function sets the optimisation level for subsequent
compilation of scripts, and returns ``None``. Otherwise it returns the current
optimisation level.
The optimisation level controls the following compilation features:
- Assertions: at level 0 assertion statements are enabled and compiled into the
bytecode; at levels 1 and higher assertions are not compiled.
- Built-in ``__debug__`` variable: at level 0 this variable expands to ``True``;
at levels 1 and higher it expands to ``False``.
- Source-code line numbers: at levels 0, 1 and 2 source-code line number are
stored along with the bytecode so that exceptions can report the line number
they occurred at; at levels 3 and higher line numbers are not stored.
The default optimisation level is usually level 0.
"""
@overload
def mem_info() -> None:
"""
Print information about currently used memory. If the *verbose* argument
is given then extra information is printed.
The information that is printed is implementation dependent, but currently
includes the amount of stack and heap used. In verbose mode it prints out
the entire heap indicating which blocks are used and which are free.
"""
@overload
def mem_info(verbose: Any, /) -> None:
"""
Print information about currently used memory. If the *verbose* argument
is given then extra information is printed.
The information that is printed is implementation dependent, but currently
includes the amount of stack and heap used. In verbose mode it prints out
the entire heap indicating which blocks are used and which are free.
"""
def kbd_intr(chr: int) -> None:
"""
Set the character that will raise a `KeyboardInterrupt` exception. By
default this is set to 3 during script execution, corresponding to Ctrl-C.
Passing -1 to this function will disable capture of Ctrl-C, and passing 3
will restore it.
This function can be used to prevent the capturing of Ctrl-C on the
incoming stream of characters that is usually used for the REPL, in case
that stream is used for other purposes.
"""
...
@overload
def qstr_info() -> None:
"""
Print information about currently interned strings. If the *verbose*
argument is given then extra information is printed.
The information that is printed is implementation dependent, but currently
includes the number of interned strings and the amount of RAM they use. In
verbose mode it prints out the names of all RAM-interned strings.
"""
@overload
def qstr_info(verbose: bool, /) -> None:
"""
Print information about currently interned strings. If the *verbose*
argument is given then extra information is printed.
The information that is printed is implementation dependent, but currently
includes the number of interned strings and the amount of RAM they use. In
verbose mode it prints out the names of all RAM-interned strings.
"""
def schedule(func: Callable[[_T], None], arg: _T, /) -> None:
"""
Schedule the function *func* to be executed "very soon". The function
is passed the value *arg* as its single argument. "Very soon" means that
the MicroPython runtime will do its best to execute the function at the
earliest possible time, given that it is also trying to be efficient, and
that the following conditions hold:
- A scheduled function will never preempt another scheduled function.
- Scheduled functions are always executed "between opcodes" which means
that all fundamental Python operations (such as appending to a list)
are guaranteed to be atomic.
- A given port may define "critical regions" within which scheduled
functions will never be executed. Functions may be scheduled within
a critical region but they will not be executed until that region
is exited. An example of a critical region is a preempting interrupt
handler (an IRQ).
A use for this function is to schedule a callback from a preempting IRQ.
Such an IRQ puts restrictions on the code that runs in the IRQ (for example
the heap may be locked) and scheduling a function to call later will lift
those restrictions.
On multi-threaded ports, the scheduled function's behaviour depends on
whether the Global Interpreter Lock (GIL) is enabled for the specific port:
- If GIL is enabled, the function can preempt any thread and run in its
context.
- If GIL is disabled, the function will only preempt the main thread and run
in its context.
Note: If `schedule()` is called from a preempting IRQ, when memory
allocation is not allowed and the callback to be passed to `schedule()` is
a bound method, passing this directly will fail. This is because creating a
reference to a bound method causes memory allocation. A solution is to
create a reference to the method in the class constructor and to pass that
reference to `schedule()`. This is discussed in detail here
:ref:`reference documentation <isr_rules>` under "Creation of Python
objects".
There is a finite queue to hold the scheduled functions and `schedule()`
will raise a `RuntimeError` if the queue is full.
"""
...
def stack_use() -> int:
"""
Return an integer representing the current amount of stack that is being
used. The absolute value of this is not particularly useful, rather it
should be used to compute differences in stack usage at different points.
"""
...
def heap_unlock() -> int:
"""
Lock or unlock the heap. When locked no memory allocation can occur and a
`MemoryError` will be raised if any heap allocation is attempted.
`heap_locked()` returns a true value if the heap is currently locked.
These functions can be nested, ie `heap_lock()` can be called multiple times
in a row and the lock-depth will increase, and then `heap_unlock()` must be
called the same number of times to make the heap available again.
Both `heap_unlock()` and `heap_locked()` return the current lock depth
(after unlocking for the former) as a non-negative integer, with 0 meaning
the heap is not locked.
If the REPL becomes active with the heap locked then it will be forcefully
unlocked.
Note: `heap_locked()` is not enabled on most ports by default,
requires ``MICROPY_PY_MICROPYTHON_HEAP_LOCKED``.
"""
def const(expr: Const_T, /) -> Const_T:
"""
Used to declare that the expression is a constant so that the compiler can
optimise it. The use of this function should be as follows::
from micropython import const
CONST_X = const(123)
CONST_Y = const(2 * CONST_X + 1)
Constants declared this way are still accessible as global variables from
outside the module they are declared in. On the other hand, if a constant
begins with an underscore then it is hidden, it is not available as a global
variable, and does not take up any memory during execution.
This `const` function is recognised directly by the MicroPython parser and is
provided as part of the :mod:`micropython` module mainly so that scripts can be
written which run under both CPython and MicroPython, by following the above
pattern.
"""
...
def heap_lock() -> int:
"""
Lock or unlock the heap. When locked no memory allocation can occur and a
`MemoryError` will be raised if any heap allocation is attempted.
`heap_locked()` returns a true value if the heap is currently locked.
These functions can be nested, ie `heap_lock()` can be called multiple times
in a row and the lock-depth will increase, and then `heap_unlock()` must be
called the same number of times to make the heap available again.
Both `heap_unlock()` and `heap_locked()` return the current lock depth
(after unlocking for the former) as a non-negative integer, with 0 meaning
the heap is not locked.
If the REPL becomes active with the heap locked then it will be forcefully
unlocked.
Note: `heap_locked()` is not enabled on most ports by default,
requires ``MICROPY_PY_MICROPYTHON_HEAP_LOCKED``.
"""
def alloc_emergency_exception_buf(size: int, /) -> None:
"""
Allocate *size* bytes of RAM for the emergency exception buffer (a good
size is around 100 bytes). The buffer is used to create exceptions in cases
when normal RAM allocation would fail (eg within an interrupt handler) and
therefore give useful traceback information in these situations.
A good way to use this function is to put it at the start of your main script
(eg ``boot.py`` or ``main.py``) and then the emergency exception buffer will be active
for all the code following it.
"""
...
class RingIO:
def readinto(self, buf, nbytes: Optional[Any] = None) -> int:
"""
Read available bytes into the provided ``buf``. If ``nbytes`` is
specified then read at most that many bytes. Otherwise, read at
most ``len(buf)`` bytes.
Return value: Integer count of the number of bytes read into ``buf``.
"""
...
def write(self, buf) -> int:
"""
Non-blocking write of bytes from ``buf`` into the ringbuffer, limited
by the available space in the ringbuffer.
Return value: Integer count of bytes written.
"""
...
def readline(self, nbytes: Optional[Any] = None) -> bytes:
"""
Read a line, ending in a newline character or return if one exists in
the buffer, else return available bytes in buffer. If ``nbytes`` is
specified then read at most that many bytes.
Return value: a bytes object containing the line read.
"""
...
def any(self) -> int:
"""
Returns an integer counting the number of characters that can be read.
"""
...
def read(self, nbytes: Optional[Any] = None) -> bytes:
"""
Read available characters. This is a non-blocking function. If ``nbytes``
is specified then read at most that many bytes, otherwise read as much
data as possible.
Return value: a bytes object containing the bytes read. Will be
zero-length bytes object if no data is available.
"""
...
def close(self) -> Incomplete:
"""
No-op provided as part of standard `stream` interface. Has no effect
on data in the ringbuffer.
"""
...
def __init__(self, size) -> None: ...
# decorators
@mp_available() # force merge
def viper(_func: Callable[_Param, _Ret], /) -> Callable[_Param, _Ret]:
"""
The Viper code emitter is not fully compliant. It supports special Viper native data types in pursuit of performance.
Integer processing is non-compliant because it uses machine words: arithmetic on 32 bit hardware is performed modulo 2**32.
Like the Native emitter Viper produces machine instructions but further optimisations are performed, substantially increasing
performance especially for integer arithmetic and bit manipulations.
See: https://docs.micropython.org/en/latest/reference/speed_python.html?highlight=viper#the-native-code-emitter
"""
...
@mp_available() # force merge
def native(_func: Callable[_Param, _Ret], /) -> Callable[_Param, _Ret]:
"""
This causes the MicroPython compiler to emit native CPU opcodes rather than bytecode.
It covers the bulk of the MicroPython functionality, so most functions will require no adaptation.
See: https://docs.micropython.org/en/latest/reference/speed_python.html#the-native-code-emitter
"""
...
@mp_available(macro="MICROPY_EMIT_INLINE_THUMB") # force merge
def asm_thumb(_func: Callable[_Param, _Ret], /) -> Callable[_Param, _Ret]:
"""
This decorator is used to mark a function as containing inline assembler code.
The assembler code is written is a subset of the ARM Thumb-2 instruction set, and is executed on the target CPU.
Availability: Only on specific boards where MICROPY_EMIT_INLINE_THUMB is defined.
See: https://docs.micropython.org/en/latest/reference/asm_thumb2_index.html
"""
...
@mp_available(port="esp8266") # force merge
def asm_xtensa(_func: Callable[_Param, _Ret], /) -> Callable[_Param, _Ret]:
"""
This decorator is used to mark a function as containing inline assembler code for the esp8266.
The assembler code is written in the Xtensa instruction set, and is executed on the target CPU.
Availability: Only on eps8266 boards.
"""
...
# See :
# - https://github.com/orgs/micropython/discussions/12965
# - https://github.com/micropython/micropython/pull/16731