RP2040 Scorpio Feather

Overview

The Adafruit RP2040 Scorpio Feather [1] board is based on the RP2040 microcontroller from Raspberry Pi Ltd. It has 8 outputs for external RGB LEDs (Neopixels), and a Stemma QT connector for easy sensor usage. It is compatible with the Feather board form factor, and has a USB type C connector.

Hardware

Microcontroller Raspberry Pi RP2040, with a max frequency of 133 MHz
Dual ARM Cortex M0+ cores
264 kByte SRAM
8 Mbyte QSPI flash
25 GPIO pins
4 ADC pins
I2C
SPI
UART
USB type C connector
Reset and boot buttons
On-board Red LED
On-board RGB LED (Neopixel)
Stemma QT I2C connector (also known as Qwiic)
Built-in lithium ion battery charger
8 external neopixel outputs

Default Zephyr Peripheral Mapping

Description	Pin	Default pin mux	Comment
Boot button	GPIO7		Alias sw0

Feather header:

Label	Pin	Default pin mux	Also used in
A0	GPIO26	ADC0
A1	GPIO27	ADC1
A2	GPIO28	ADC2
A3	GPIO29	ADC3
24	GPIO24
25	GPIO25
SCK	GPIO14	SPI1 SCK
MO	GPIO15	SPI1 MOSI
MI	GPIO8	SPI1 MISO
R	GPIO1	UART0 RX
T	GPIO0	UART0 TX
4	GPIO4	PIO0	On-board Neopixel
D	GPIO2	I2C1 SDA	Stemma QT
C	GPIO3	I2C1 SCL	Stemma QT
5	GPIO5
6	GPIO6
9	GPIO9
10	GPIO10
11	GPIO11
12	GPIO12
13	GPIO13		Red user LED

Stemma QT I2C connector (pins also available in the Feather header):

Label	Pin	Default pin mux
SDA	GPIO2	I2C1 SDA
SCL	GPIO3	I2C1 SCL

External Neopixel header:

Label	Pin	Default pin mux
0	GPIO16	PIO1
1	GPIO17
2	GPIO18
3	GPIO19
4	GPIO20
5	GPIO21
6	GPIO22
7	GPIO23

Supported Features

The adafruit_feather_scorpio_rp2040 board supports the hardware features listed below.

on-chip / on-board: Feature integrated in the SoC / present on the board.
2 / 2: Number of instances that are enabled / disabled.
Click on the label to see the first instance of this feature in the board/SoC DTS files.
vnd,foo: Compatible string for the Devicetree binding matching the feature.
Click on the link to view the binding documentation.

`adafruit_feather_scorpio_rp2040/rp2040` target

Type	Location	Description	Compatible
CPU	on-chip	ARM Cortex-M0+ CPU2	`arm,cortex-m0+`
ADC	on-chip	Raspberry Pi Pico ADC1	`raspberrypi,pico-adc`
Clock control	on-chip	Raspberry Pi Pico clock controller node1	`raspberrypi,pico-clock-controller`
	on-chip	The representation of Raspberry Pi Pico’s clock11 2	`raspberrypi,pico-clock`
	on-chip	The representation of Raspberry Pi Pico’s PLL2	`raspberrypi,pico-pll`
	on-chip	The representation of Raspberry Pi Pico ring oscillator1	`raspberrypi,pico-rosc`
	on-chip	The representation of Raspberry Pi Pico external oscillator1	`raspberrypi,pico-xosc`
Counter	on-chip	Raspberry Pi Pico timer1	`raspberrypi,pico-timer`
DMA	on-chip	Raspberry Pi Pico DMA1	`raspberrypi,pico-dma`
Flash controller	on-chip	Raspberry Pi Pico flash controller1	`raspberrypi,pico-flash-controller`
GPIO & Headers	on-chip	Raspberry Pi Pico GPIO1	`raspberrypi,pico-gpio`
	on-chip	Raspberry Pi Pico GPIO Port1	`raspberrypi,pico-gpio-port`
	on-board	GPIO pins exposed on Adafruit Feather headers1	`adafruit-feather-header`
	on-board	STEMMA QT is a 4-pin JST-SH connector for I2C devices1	`stemma-qt-connector`
I2C	on-chip	Raspberry Pi Pico I2C1 1	`raspberrypi,pico-i2c`
Input	on-board	Group of GPIO-bound input keys1	`gpio-keys`
Interrupt controller	on-chip	ARMv6-M NVIC (Nested Vectored Interrupt Controller) controller1	`arm,v6m-nvic`
LED	on-board	Group of GPIO-controlled LEDs1	`gpio-leds`
LED strip	on-board	The pio node configured for ws28122	`worldsemi,ws2812-rpi_pico-pio`
Miscellaneous	on-chip	Raspberry Pi Pico PIO2	`raspberrypi,pico-pio`
MTD	on-chip	Flash node1	`soc-nv-flash`
MTD	on-board	Fixed partitions of a flash (or other non-volatile storage) memory1	`fixed-partitions`
Pin control	on-chip	Raspberry Pi Pico Pin Controller1	`raspberrypi,pico-pinctrl`
PWM	on-chip	Raspberry Pi Pico PWM1	`raspberrypi,pico-pwm`
Regulator	on-chip	Raspberry Pi Pico core supply regurator1	`raspberrypi,core-supply-regulator`
Reset controller	on-chip	Raspberry Pi Pico Reset Controller1	`raspberrypi,pico-reset`
RTC	on-chip	Raspberry Pi Pico RTC1	`raspberrypi,pico-rtc`
Sensors	on-chip	Raspberry Pi Pico family temperature sensor node1	`raspberrypi,pico-temp`
Serial controller	on-chip	Raspberry Pi Pico UART1 1	`raspberrypi,pico-uart`
SPI	on-chip	Raspberry Pi Pico SPI1 1	`raspberrypi,pico-spi`
SRAM	on-chip	Generic on-chip SRAM1	`mmio-sram`
Timer	on-chip	ARMv6-M System Tick1	`arm,armv6m-systick`
USB	on-chip	Raspberry Pi Pico USB Device Controller1	`raspberrypi,pico-usbd`
Watchdog	on-chip	Raspberry Pi Pico Watchdog1	`raspberrypi,pico-watchdog`

Programming and Debugging

The adafruit_feather_scorpio_rp2040 board supports the runners and associated west commands listed below.

	flash	debug	attach	rtt	debugserver
blackmagicprobe	✅	✅	✅
jlink	✅	✅	✅	✅	✅
openocd	✅	✅ (default)	✅	✅	✅
pyocd	✅	✅	✅	✅	✅
uf2	✅ (default)

By default programming is done via the USB connector. Press and hold the BOOT button, and then press the RST button, and the device will appear as a USB mass storage unit. Building your application will result in a build/zephyr/zephyr.uf2 file. Drag and drop the file to the USB mass storage unit, and the board will be reprogrammed.

It is also possible to program and debug the board via the SWDIO and SWCLK pins. Then a separate programming hardware tool is required, and for example the openocd software is used. Typically the OPENOCD and OPENOCD_DEFAULT_PATH values should be set when building, and the --runner openocd argument should be used when flashing. For more details on programming RP2040-based boards, see Programming and Debugging.

Flashing

To run the Blinky sample:

# From the root of the zephyr repository
west build -b adafruit_feather_scorpio_rp2040 samples/basic/blinky/
west flash

Try also the LED strip, Input dump, Hello World and Analog-to-Digital Converter (ADC) with devicetree samples.

The Button sample might show spurious button presses, as the button is connected to a line also used for the QSPI memory.

The use of the Stemma QT I2C connector is demonstrated using the Generic Light Sensor Polling sample and a separate shield:

# From the root of the zephyr repository
west build -b adafruit_feather_scorpio_rp2040 --shield adafruit_veml7700 samples/sensor/light_polling/
west flash

As example usage of external Neopixels via the board edge header, the devicetree describes a string of Neopixels connected to output 0. You need to adapt the number of pixels given in the external_ws2812 node to the actual number of pixels in your external light-strip. You must also change the aliases attribute from led-strip = &onboard_ws2812; to led-strip = &external_ws2812;. Then use the LED strip sample.

It is possible to enable Neopixel drivers for the other external output pins, by adjusting the devicetree file in a similar manner.