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Add most formatting-only commits to this file so that when used with
git blame, these commits are excluded and the output shows only the
interesting bits.

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

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

Fixes issue #6863.
Signed-off-by: Damien George <damien@micropython.org>

This brings the port's configuration closer to the stm32 and esp32 ports.
Signed-off-by: Damien George <damien@micropython.org>

Fixes #6991.

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

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

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

The default pins can be optionally configured by a board.

Fixes issue #6974.
Signed-off-by: Damien George <damien@micropython.org>

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

When UART is used for REPL and the MCU frequency is changed, the UART
has to be re-initialised.  Besides that the UART may have to be recreated
after a frequency change, but with USB REPL this is not a problem.

Thanks to @HermannSW for spotting and providing the change.

Using the standard machine.freq().

The safe ranges tested were 10 and 12-270MHz, at which USB REPL still
worked.  Requested settings can be checked with the script:
pico-sdk/src/rp2_common/hardware_clocks/scripts/vcocalc.py.  At frequencies
like 300MHz the script still signaled OK, but USB did not work any more.

sm.get(buf) was waiting for one item more than the length of the supplied
buffer.  Even if this item was not stored, sm_get would block trying to get
an item from the RX fifo.

As part of the fix, the edge case for a zero length buffer was moved up to
the section where the function arguments are handled.  In case of a zero
length buffer, sm.get() now returns immediately that buffer.

The bitmasks supplied for initialization of out/set/sideset were only 8 bit
instead of 32.  This resulted in an error, that not more than 8 consecutive
pins would get initialized.

Fixes issue #6933.

Usage as in the other ports:

    keyword "invert"
    constants: INV_TX and INV_RX

Sample: uart = UART(1, invert=UART.INV_TX | UART.INV_RX)

Allows interfacing with SD cards, for example.

From a version numbering point of view this is a downgrade (2.17.0 ->
2.16.x).  However the latest commit for version 2.17.0 is from March 2019
and no further minor release happened after 2.17.0.  This version is EOL.
2.16.x though is still actively maintained as a long term release, hence
security and stability fixes are still being backported, including
compatibility with upcoming compiler releases.

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

Fixes issue #6342.

This allows the user to enable wake-up sources using the EWUP bits, on F7
MCUs.

Disabling the wake-up sources while clearing the wake-up flags follows the
reference manual and ST examples.

state.reset_mode is updated by `MICROPY_BOARD_BEFORE_SOFT_RESET_LOOP` but
not passed to `init_flash_fs`, and so factory reset is not executed on
boards that do not have a bootloader.  This bug was introduced by
4c3976bb

Fixes #6903.

For STM32WB MCUs, EXTI offset addresses were not parsed due to the
appearance of "[31:0]" in a comment in the .h file.

A corrupt filesystem may lead to a request for a block which is out of
range of the block device limits.  Return an error instead of passing the
request down to the lower layer.

Two of the defaults have also changed in this commit:

- MICROPY_HW_RFCORE_BLE_LSE_SOURCE changed from 1 to 0, which configures
  the LsSource to be LSE (needed due to errata 2.2.1).

- MICROPY_HW_RFCORE_BLE_VITERBI_MODE changed from 0 to 1, which enables
  Viterbi mode, following all the ST examples.
Signed-off-by: Damien George <damien@micropython.org>

Instead of raising a ZeroDivisionError, this tool now just skips any
elements in the DFU file that have zero size.
Signed-off-by: Damien George <damien@micropython.org>

These ports already have uzlib enabled so this additional ubinascii.crc32
function only costs about 90 bytes of flash.
Signed-off-by: Damien George <damien@micropython.org>

Fixes issue #6942.
Signed-off-by: Damien George <damien@micropython.org>

This allows a port to specify a custom qstrdefsport.h file, the same as the
QSTR_DEFS variable in a Makefile.
Signed-off-by: Damien George <damien@micropython.org>

And also MICROPY_PY_QSTRDEFS to MICROPY_QSTRDEFS_PY.  These variables are
all related.
Signed-off-by: Damien George <damien@micropython.org>

Signed-off-by: iTitou <moiandme@gmail.com>

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

Add LPUART1 as a standard UART.  No low power features are supported, yet.
LPUART1 is enabled as the next available UART after the standard U(S)ARTs:

    STM32WB:      LPUART1 = UART(2)
    STM32L0:      LPUART1 = UART(6)
    STM32L4:      LPUART1 = UART(6)
    STM32H7:      LPUART1 = UART(9)

On all ports: LPUART1 = machine.UART('LP1')

LPUART1 is enabled by defining MICROPY_HW_LPUART1_TX and
MICROPY_HW_LPUART1_RX in mpconfigboard.h.
Signed-off-by: Chris Mason <c.mason@inchipdesign.com.au>