Uses build.rs in board directories to set the linker options locally.
The file .cargo/config can't be used for that, as in a workspace the
local .cargo/config is ignored if the build is triggered from the
workspace root.
Current version of probe-run is 0.3.3, which uses defmt 0.3.2.
With a firmware using defmt 0.2, this causes the following error
message:
```
Error: defmt wire format version mismatch: firmware is using 0.2, `probe-run` supports 3
suggestion: `cargo install` a different version of `probe-run` that supports defmt 0.2
```
Therefore, upgrade defmt dependency, and also fix the linker script
in .cargo/config.
* Update BSP README's to use current version number
* Update ws2812-pio and i2c-pio to release 0.3.0
* Bump patch number for BSPs so we can push with correct docs
* Update changelog, readme and version number for HAL 0.5.0 release
* Bump HAL version in BSP deps
* Point ws2812-pio and i2c-pio-rs at hal_0.5.0 branches
* Update changelog with latest commits and release date
* Add the Pimoroni Plasma 2040 board
This PR adds the board support package and a simple example.
The example just blinks the on-board RGB LED.
An example should be added for using the board to control an LED strip.
This should probably use smart-leds with the associated PIO driver.
An example or functionality should be added for the current sensor.
* Rename LED data line from dat to data to match schematic
* Add an example for driving WS2812 LEDs
This is pretty much a copy-paste of the awesome pico_ws2812_led example.
* Remove reference in README to rp-pico
* Remove reference to pico board clock speed
I have removed this in the Plasma 2040 repository and where I copied it from, tiny2040_blinky.
* Remove redundant namespace
* Add self-reference in README to the current board's GitHub README
Fix the erroneous link in the pimoroni-tiny2040 README from which I copied.
