=============================== Raspberry Pi Pico W =============================== The `Raspberry Pi Pico <https://www.raspberrypi.com/products/raspberry-pi-pico/>`_ is a general purpose board supplied by the Raspberry Pi Foundation. The W variant adds built in WiFi communications. .. figure:: RaspberryPiPicoW.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 * Built in WiFi radio (Infineon CYW43439) 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 ================ LED controlled by GPIO0 of the wireless chip (not the RP2040 processor). Use rp2040_extra_gpio_put(0,value) to control this LED. 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. Wireless Communication ====================== The on board Infineon CYW43439 supports 2.4 GHz WiFi 4 communications (802.11n), WPS3 and SoftAP with up to four clients. Pin Mapping =========== ===== ========== ========== Pin 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 - WiFi controller enable. GPIO24 I/O - WiFi controller data line. GPIO25 Output - WiFi controller chip select line. GPIO29 Output - WiFi controller clock line. ADC3 Input - Analog voltage equal to one third of VSys voltage. Note: ADC3 and GPIO29 share the same pin on the RP2040. If the GPIO25 line is held high (Wifi controller NOT selected) then a voltage equal to one third of the VSys voltage with appear on this line and can be read with ADC3. When the WiFi chip is selected this voltage will be removed so the line can be used as a clock for data exchange with the WiFi controller. Separate pins for the Serial Debug Port (SDB) are available WiFi Controller GPIO ==================== GPIO0 - Output - On board LED. GPIO1 - Output - Power supply control. GPIO2 - Input - High if USB port or Pad 40 supplying power. 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 the wireless chip's GPIO1 (not the RP2040's GPIO1). Configurations ============== audiopack --------- NuttShell configuration (console enabled in UART0, at 115200 bps) with support for NSPlayer audio player. 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. telnet ------ NuttShell configuration (console enabled in UART0, at 115200 bps) with WiFi client mode and both telnet server and client enabled. After loading this configuration use make menuconfig to change the country code in Device Drivers->Wireless Device Support->IEEE 802.11 Device Support and the wireless configuration in Application Configuration->Network Utilities->Network initialization->WAPI Configuration to match your wireless network. 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.