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Fixes #1696

Additional pin definitions for Pimoroni Tiny 2040, including using the Green LED element of the RGB LED as the default LED.

There are only 12 external header pins for GPIO, including 4 ADC pins, so there are less options for assigning pins than on a generic Pico RP2040. In particular, there can only be one SPI, and it can't have an SS pin but I've defined GPIO17, as on the pico, because the definition is used in generic / common.h.

BOOTSEL on the Pimoroni Tiny 2040 is connected to GPIO23. I don't know if that has any consequences for implementing reading from BOOTSEL for this board. That may need to be revisited, but it doesn't appear to involve any changes to pins_arduino.h.

Move to a patched ArduinoCore-API revision.

Fixes #1691

No functional changes, just for completeness.

For some reason `program ... reset" causes OpenOCD to leave the chip in a
state where the 2nd core does not come up properly, leading to problems in
FreeRTOS and others.

Use a separate reset sequence after programming to work around the issue.

Fixes #1687

Fixes #1682

Make the HID report wait up to 500ms for an existing one to go out
before giving up sending a report.

Fixes #1683

Fixes #1066

Implements a simple TDM mode for the I2S output object.

Fixes #1676

Fixes #1604.  Supports 2MB and 8MB revs

Major toolchain update including:
* GCC 12.3
* GDB 12
* OpenOCD 0.12
* Picotool 1.1.2

* Fix MDNS infinite recursion

* Remove legacy Picoprobe

Fixes #1313
Fixes #1650

Fixes  #1656

Setting a pin to the current value is a no-op, not fatal.

Fixes #1652

fixed typo in license.rst

Fixes #1619

Requiring the auto-discovery tool and serial monitor if they have not already been included by other boards (namely if AVR cores have been uninstalled in the IDE).

If another packet comes in between freeing `_rx_buf` and setting `_rx_buf` to 0, that new packet could get put into the same memory address and get concatenated to itself, which leads to an infinite loop.
New solution assigns a temp pointer, sets `rx_buf` to 0, then frees the memory, which guarantees `_rx_buf` always points to valid data.

Fixes #1620

Board documentation can be found here:
https://silicognition.com/Products/rp2040-shim/Signed-off-by: Patrick Van Oosterwijck <patrick@silicognition.com>

The `_idedata` has been changed to `__idedata` in newer PlatformIO core versions per https://github.com/platformio/platformio-core/commit/158aabbdf23ed1ff8f5e3f01fb4ef1723a78d3bb. This change has broken the logic to expand out the `-iprefix PATH @INCLUDEFILE` argument into its individual include paths, causing Intellisense breakages on some VSCode systems and other IDEs that didn't handle these arguments correctly or in which the path was corrupted.

When we swap the Wire objects, we need the i2c0 IRQ shim to call
Wire1.onIRQ, not the usual Wire.onIRQ.  Same for i2c1 IRQ shim.

Fixes #1607

Thanks to @pietglas for finding and fixing.  See #1590 for more info.

See #1590

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