Pimoroni Tiny 2040

Board Overview

Pimoroni Tiny 2040

Name:

tiny2040

Vendor:

Pimoroni Ltd.

Architecture:

arm

SoC:

rp2040

Browse board sources

Overview

The Pimoroni Tiny 2040 [1] board is based on the RP2040 microcontroller from Raspberry Pi Ltd. The board has two 8-pin headers and 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

• 8 GPIO pins

• 4 ADC pins

• I2C

• SPI

• UART

• USB type C connector

• Reset and boot buttons

• RGB user LED (red, green and blue controlled individually)

Default Zephyr Peripheral Mapping

Description	Pin	Comments
Red LED	GPIO18	Alias led0
Green LED	GPIO19	Alias led1
Blue LED	GPIO20	Alias led2
BOOT button	GPIO23	Alias sw0

GPIO header:

Label	Pin	Default pin mux
0	GPIO0	UART0 TX
1	GPIO1	UART0 RX
2	GPIO2	I2C1 SDA
3	GPIO3	I2C1 SCL
4	GPIO4
5	GPIO5
6	GPIO6
7	GPIO7
A0	GPIO26	ADC0
A1	GPIO27	ADC1
A2	GPIO28	ADC2
A3	GPIO29	ADC3

See also schematic [2].

Supported Features

The tiny2040 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.

tiny2040/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 clock112	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
I2C	on-chip	Raspberry Pi Pico I2C11	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
Miscellaneous	on-chip	Raspberry Pi Pico PIO2	raspberrypi,pico-pio
MTD	on-chip	Flash node1	soc-nv-flash
	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 UART11	raspberrypi,pico-uart
SPI	on-chip	Raspberry Pi Pico SPI2	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 tiny2040 board supports the runners and associated west commands listed below.

	flash	debug	rtt	attach	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 tiny2040 samples/basic/blinky/
west flash

Note that the red, green and blue parts of the RGB LED are controlled individually by GPIO pins. By default the red color is blinking when running the sample. The sample does not configure the GPIO pins for the green and blue parts, which is why these might show a dim light. See the implementation for the Blinky how the configuration is done, if you would like to control the other colors.

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

References

[1]

https://shop.pimoroni.com/products/tiny-2040

[2]

https://cdn.shopify.com/s/files/1/0174/1800/files/Tiny2040_PIM558_schematic.pdf