2022-08-17 19:41:50 +02:00
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===============================
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2022-09-05 20:34:58 +02:00
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Raspberry Pi Pico W
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2022-08-17 19:41:50 +02:00
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===============================
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The `Raspberry Pi Pico <https://www.raspberrypi.com/products/raspberry-pi-pico/>`_ is a general purpose board supplied by
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the Raspberry Pi Foundation. The W variant adds built in WiFi communications.
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.. figure:: RaspberryPiPicoW.png
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:align: center
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Features
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========
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* RP2040 microcontroller chip
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* Dual-core ARM Cortex M0+ processor, flexible clock running up to 133 MHz
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* 264kB of SRAM, and 2MB of on-board Flash memory
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* Castellated module allows soldering direct to carrier boards
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* USB 1.1 Host and Device support
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* Low-power sleep and dormant modes
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* Drag & drop programming using mass storage over USB
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* 26 multi-function GPIO pins
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* 2× SPI, 2× I2C, 2× UART, 3× 12-bit ADC, 16× controllable PWM channels
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* Accurate clock and timer on-chip
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* Temperature sensor
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* Accelerated floating point libraries on-chip
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* 8 × Programmable IO (PIO) state machines for custom peripheral support
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* Built in WiFi radio (Infineon CYW43439)
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Serial Console
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==============
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By default a serial console appears on pins 1 (TX GPIO0) and pin 2
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(RX GPIO1). This console runs a 115200-8N1.
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The board can be configured to use the USB connection as the serial console.
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Buttons and LEDs
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================
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LED controlled by GPIO0 of the wireless chip (not the RP2040 processor).
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2022-09-05 20:34:58 +02:00
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Use rp2040_extra_gpio_put(0,value) to control this LED.
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2022-08-17 19:41:50 +02:00
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A BOOTSEL button, which if held down when power is first
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applied to the board, will cause the RP2040 to boot into programming
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mode and appear as a storage device to a computer connected via USB.
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Saving a .UF2 file to this device will replace the Flash ROM contents
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on the RP2040.
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Wireless Communication
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======================
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The on board Infineon CYW43439 supports 2.4 GHz WiFi 4 communications
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(802.11n), WPS3 and SoftAP with up to four clients.
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Pin Mapping
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===========
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===== ========== ==========
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Pin Signal Notes
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===== ========== ==========
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1 GPIO0 Default TX for UART0 serial console
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2 GPIO1 Default RX for UART1 serial console
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3 Ground
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4 GPIO2
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5 GPIO3
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6 GPIO4
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7 GPIO5
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8 Ground
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9 GPIO6
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10 GPIO7
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11 GPIO8
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12 GPIO9
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13 Ground
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14 GPIO10
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15 GPIO11
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16 GPIO12
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17 GPIO13
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18 Ground
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19 GPIO14
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20 GPIO15
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21 GPIO16
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22 GPIO17
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23 Ground
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24 GPIO18
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25 GPIO19
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26 GPIO20
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27 GPIO21
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28 Ground
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29 GPIO22
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30 Run
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31 GPIO26 ADC0
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32 GPIO27 ADC1
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33 AGND Analog Ground
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34 GPIO28 ADC2
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35 ADC_VREF
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36 3V3 Power output to peripherals
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37 3V3_EN Pull to ground to turn off.
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38 Ground
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39 VSYS +5V Supply to board
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40 VBUS Connected to USB +5V
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===== ========== ==========
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Other RP2040 Pins
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=================
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GPIO23 Output - WiFi controller enable.
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GPIO24 I/O - WiFi controller data line.
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GPIO25 Output - WiFi controller chip select line.
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GPIO29 Output - WiFi controller clock line.
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ADC3 Input - Analog voltage equal to one third of VSys voltage.
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Note: ADC3 and GPIO29 share the same pin on the RP2040. If the
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GPIO25 line is held high (Wifi controller NOT selected) then a voltage
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equal to one third of the VSys voltage with appear on this line and
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can be read with ADC3. When the WiFi chip is selected this voltage
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will be removed so the line can be used as a clock for data exchange
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with the WiFi controller.
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Separate pins for the Serial Debug Port (SDB) are available
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WiFi Controller GPIO
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====================
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GPIO0 - Output - On board LED.
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GPIO1 - Output - Power supply control.
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GPIO2 - Input - High if USB port or Pad 40 supplying power.
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Power Supply
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============
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The Raspberry Pi Pico can be powered via the USB connector,
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or by supplying +5V to pin 39. The board had a diode that prevents
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power from pin 39 from flowing back to the USB socket, although
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the socket can be power via pin 30.
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The Raspberry Pi Pico chip run on 3.3 volts. This is supplied
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by an onboard voltage regulator. This regulator can be disabled
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by pulling pin 37 to ground.
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The regulator can run in two modes. By default the regulator runs
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in PFM mode which provides the best efficiency, but may be
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switched to PWM mode for improved ripple by outputting a one
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on the wireless chip's GPIO1 (not the RP2040's GPIO1).
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Configurations
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==============
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audiopack
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---------
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NuttShell configuration (console enabled in UART0, at 115200 bps) with
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support for NSPlayer audio player.
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composite
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---------
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NuttShell configuration (console enabled in UART0, at 115200 bps) with support for
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CDC/ACM with MSC USB composite driver.
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displaypack
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-----------
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NuttShell configuration (console enabled in USB Port, at 115200 bps) supporting
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ST7789 video display.
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enc28j60
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--------
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NuttShell configuration (console enabled in UART0, at 115200 bps) with support for
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NC28J60.
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lcd1602
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-------
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NuttShell configuration (console enabled in UART0, at 115200 bps) with support for
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LCD1602.
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nsh
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---
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Basic NuttShell configuration (console enabled in UART0, at 115200 bps).
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2022-09-05 20:34:58 +02:00
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nsh-flash
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---------
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Basic NuttShell configuration (console enabled in UART0, at 115200 bps
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with SMART flash filesystem.
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2022-08-17 19:41:50 +02:00
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nshsram
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-------
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NuttShell configuration (console enabled in UART0, at 115200 bps) with interrupt
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vectors in RAM.
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smp
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---
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Basic NuttShell configuration (console enabled in UART0, at 115200 bps) with
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both ARM cores enabled.
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spisd
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-----
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NuttShell configuration (console enabled in UART0, at 115200 bps) with SPI configured.
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ssd1306
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-------
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NuttShell configuration (console enabled in UART0, at 115200 bps) with support for
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ssd1306.
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st7735
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------
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NuttShell configuration (console enabled in UART0, at 115200 bps) with support for
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st7735.
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usbmsc
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------
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NuttShell configuration (console enabled in UART0, at 115200 bps) with support for
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usbmsc.
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usbnsh
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------
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Basic NuttShell configuration (console enabled in USB Port, at 115200 bps).
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waveshare-lcd-1.14
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------------------
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NuttShell configuration (console enabled in UART0, at 115200 bps) with support for
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st7789.
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waveshare-lcd-1.3
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-----------------
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NuttShell configuration (console enabled in UART0, at 115200 bps) with support for
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usbmsc.
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