237 lines
5.4 KiB
ReStructuredText
237 lines
5.4 KiB
ReStructuredText
===============================
|
||
Raspberry Pi Pico
|
||
===============================
|
||
|
||
The `Raspberry Pi Pico <https://www.raspberrypi.com/products/raspberry-pi-pico/>`_ is a general purpose board supplied by
|
||
the Raspberry Pi Foundation.
|
||
|
||
.. figure:: RaspberryPiPico.png
|
||
:align: center
|
||
|
||
Features
|
||
========
|
||
|
||
* RP2040 microcontroller chip
|
||
* Dual-core ARM Cortex M0+ processor, flexible clock running up to 133 MHz
|
||
* 264kB of SRAM, and 2MB of on-board Flash memory
|
||
* Castellated module allows soldering direct to carrier boards
|
||
* USB 1.1 Host and Device support
|
||
* Low-power sleep and dormant modes
|
||
* Drag & drop programming using mass storage over USB
|
||
* 26 multi-function GPIO pins
|
||
* 2× SPI, 2× I2C, 2× UART, 3× 12-bit ADC, 16× controllable PWM channels
|
||
* Accurate clock and timer on-chip
|
||
* Temperature sensor
|
||
* Accelerated floating point libraries on-chip
|
||
* 8 × Programmable IO (PIO) state machines for custom peripheral support
|
||
|
||
Serial Console
|
||
==============
|
||
|
||
By default a serial console appears on pins 1 (TX GPIO0) and pin 2
|
||
(RX GPIO1). This console runs a 115200-8N1.
|
||
|
||
The board can be configured to use the USB connection as the serial console.
|
||
|
||
Buttons and LEDs
|
||
================
|
||
|
||
User LED controlled by GPIO25.
|
||
|
||
A BOOTSEL button, which if held down when power is first
|
||
applied to the board, will cause the RP2040 to boot into programming
|
||
mode and appear as a storage device to a computer connected via USB .
|
||
Saving a .UF2 file to this device will replace the Flash ROM contents
|
||
on the RP2040.
|
||
|
||
Pin Mapping
|
||
===========
|
||
Pads numbered anticlockwise from USB connector.
|
||
|
||
===== ========== ==========
|
||
Pad Signal Notes
|
||
===== ========== ==========
|
||
1 GPIO0 Default TX for UART0 serial console
|
||
2 GPIO1 Default RX for UART1 serial console
|
||
3 Ground
|
||
4 GPIO2
|
||
5 GPIO3
|
||
6 GPIO4
|
||
7 GPIO5
|
||
8 Ground
|
||
9 GPIO6
|
||
10 GPIO7
|
||
11 GPIO8
|
||
12 GPIO9
|
||
13 Ground
|
||
14 GPIO10
|
||
15 GPIO11
|
||
16 GPIO12
|
||
17 GPIO13
|
||
18 Ground
|
||
19 GPIO14
|
||
20 GPIO15
|
||
21 GPIO16
|
||
22 GPIO17
|
||
23 Ground
|
||
24 GPIO18
|
||
25 GPIO19
|
||
26 GPIO20
|
||
27 GPIO21
|
||
28 Ground
|
||
29 GPIO22
|
||
30 Run
|
||
31 GPIO26 ADC0
|
||
32 GPIO27 ADC1
|
||
33 AGND Analog Ground
|
||
34 GPIO28 ADC2
|
||
35 ADC_VREF
|
||
36 3V3 Power output to peripherals
|
||
37 3V3_EN Pull to ground to turn off.
|
||
38 Ground
|
||
39 VSYS +5V Supply to board
|
||
40 VBUS Connected to USB +5V
|
||
===== ========== ==========
|
||
|
||
Other RP2040 Pins
|
||
=================
|
||
|
||
GPIO23 Output - Power supply control.
|
||
GPIO24 Input - High if USB port or Pad 40 supplying power.
|
||
GPIO25 Output - On board LED.
|
||
ADC3 Input - Analog voltage equal to one third of VSys voltage.
|
||
|
||
Separate pins for the Serial Debug Port (SDB) are available
|
||
|
||
Power Supply
|
||
============
|
||
|
||
The Raspberry Pi Pico can be powered via the USB connector,
|
||
or by supplying +5V to pin 39. The board had a diode that prevents
|
||
power from pin 39 from flowing back to the USB socket, although
|
||
the socket can be power via pin 30.
|
||
|
||
The Raspberry Pi Pico chip run on 3.3 volts. This is supplied
|
||
by an onboard voltage regulator. This regulator can be disabled
|
||
by pulling pin 37 to ground.
|
||
|
||
The regulator can run in two modes. By default the regulator runs
|
||
in PFM mode which provides the best efficiency, but may be
|
||
switched to PWM mode for improved ripple by outputting a one
|
||
on GPIO23.
|
||
|
||
Configurations
|
||
==============
|
||
|
||
audiopack
|
||
---------
|
||
|
||
NuttShell configuration (console enabled in UART0, at 115200 bps) with
|
||
support for NXPlayer audio player.
|
||
|
||
bmp280
|
||
------
|
||
|
||
NuttShell configuration (console enabled in USB Port, at 115200 bps) with support for Bosch BMP280 sensor:
|
||
|
||
.. code-block:: console
|
||
|
||
nsh> bmp280
|
||
Absolute pressure [hPa] = 1008.460022
|
||
Temperature [C] = 21.809999
|
||
nsh>
|
||
|
||
composite
|
||
---------
|
||
|
||
NuttShell configuration (console enabled in UART0, at 115200 bps) with support for
|
||
CDC/ACM with MSC USB composite driver.
|
||
|
||
displaypack
|
||
-----------
|
||
|
||
NuttShell configuration (console enabled in USB Port, at 115200 bps) supporting
|
||
ST7789 video display.
|
||
|
||
enc28j60
|
||
--------
|
||
|
||
NuttShell configuration (console enabled in UART0, at 115200 bps) with support for
|
||
NC28J60.
|
||
|
||
lcd1602
|
||
-------
|
||
|
||
NuttShell configuration (console enabled in UART0, at 115200 bps) with support for
|
||
LCD1602.
|
||
|
||
nsh
|
||
---
|
||
|
||
Basic NuttShell configuration (console enabled in UART0, at 115200 bps).
|
||
|
||
nsh-flash
|
||
---------
|
||
|
||
Basic NuttShell configuration (console enabled in UART0, at 115200 bps
|
||
with SMART flash filesystem.
|
||
|
||
nshsram
|
||
-------
|
||
|
||
NuttShell configuration (console enabled in UART0, at 115200 bps) with interrupt
|
||
vectors in RAM.
|
||
|
||
smp
|
||
---
|
||
|
||
Basic NuttShell configuration (console enabled in UART0, at 115200 bps) with
|
||
both ARM cores enabled.
|
||
|
||
spisd
|
||
-----
|
||
|
||
NuttShell configuration (console enabled in UART0, at 115200 bps) with SPI configured.
|
||
|
||
ssd1306
|
||
-------
|
||
|
||
NuttShell configuration (console enabled in UART0, at 115200 bps) with support for
|
||
ssd1306.
|
||
|
||
st7735
|
||
------
|
||
|
||
NuttShell configuration (console enabled in UART0, at 115200 bps) with support for
|
||
st7735.
|
||
|
||
usbmsc
|
||
------
|
||
|
||
NuttShell configuration (console enabled in UART0, at 115200 bps) with support for
|
||
usbmsc.
|
||
|
||
usbnsh
|
||
------
|
||
|
||
Basic NuttShell configuration (console enabled in USB Port, at 115200 bps).
|
||
|
||
waveshare-lcd-1.14
|
||
------------------
|
||
|
||
NuttShell configuration (console enabled in UART0, at 115200 bps) with support for
|
||
st7789.
|
||
|
||
waveshare-lcd-1.3
|
||
-----------------
|
||
|
||
NuttShell configuration (console enabled in UART0, at 115200 bps) with support for
|
||
usbmsc.
|
||
|
||
|
||
README.txt
|
||
==========
|
||
|
||
.. include:: README.txt
|
||
:literal:
|