989809b82c
Added chip tags to the rp2350 board family. Signed-off-by: Matteo Golin <matteo.golin@gmail.com>
174 lines
4.3 KiB
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174 lines
4.3 KiB
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==========================
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Seeed Studio XIAO RP2350
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==========================
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.. tags:: chip:rp2350
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The `Seeed Studio XIAO RP2350 <https://wiki.seeedstudio.com/getting-started-xiao-rp2350/>`_ is a general purpose board supplied by
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Seeed Studio and it is compatible with the Rapiberry RP2350 ecosystem, sharing the same MCU as Rapiberry Pi Pico 2.
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.. figure:: xiao-rp2350.jpg
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:align: center
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Features
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========
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* Raspberry Pi RP2350, ARM® Dual Cortex-M33 @ 150MHz, FPU
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* 520kB SRAM, 2MB Flash
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* Security: OTP, Secure Boot, Arm TrustZone
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* USB Type-C interface
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* 19 Pins:3x Analog,19x Digital, 2x I²C, 2x UART, 2x SPI, All PWM
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* 1 user LED, 1 power LED，1 RGB LED (WS2812)
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* 1 RESET button, 1 BOOT button
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Serial Console
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==============
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By default, a serial console appears on pins 6 (TX GPIO) and pin 7
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(RX GPIO). 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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User LED
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========
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The USER LED, the yellow LED on the XIAO RP2350, is connected to GPIO25/D19
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according to the schematic diagram. The USER LED will light up when set to
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a low level and turn off when set to a high level.
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Buttons
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=======
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The RESET and BOOT buttons can be used to enter bootloader mode by press and
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hold BOOT buttons and then press and release RESET button. Then, the board will
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enumerate as a storage device to a computer connected via USB. Saving a .UF2
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file to this device will replace the Flash ROM contents on the RP2350.
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Pin Mapping
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===========
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Pads numbered anticlockwise from USB connector.
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===== ========== ==========
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Pad Signal Notes
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===== ========== ==========
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0 GPIO26 D0/A0
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1 GPIO27 D1/A1
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2 GPIO28 D2/A2
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3 GPIO5 D3/A3
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4 GPIO6 D4/SDA
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5 GPIO7 D5/SCL
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6 GPIO0 D6/Default TX for UART0 serial console
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7 GPIO1 D7/Default RX for UART0 serial console
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8 GPIO2 D8/SCK
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9 GPIO4 D9/MISO
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10 GPIO3 D10/MOSI
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11 3V3 Power output to peripherals
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12 Ground
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13 VIN +5V Supply to board
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===== ========== ==========
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Power Supply
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============
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The working voltage of the MCU is 3.3V. Voltage input connected to
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general I/O pins may cause chip damage if it’s higher than 3.3V.
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Installation
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============
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1. Configure and build NuttX:
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.. code-block:: console
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$ git clone https://github.com/apache/nuttx.git nuttx
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$ git clone https://github.com/apache/nuttx-apps.git apps
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$ cd nuttx
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$ make distclean
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$ ./tools/configure.sh xiao-rp2350:nsh
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$ make V=1
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2. Connect the Seeed Studio XIAO RP2350, and enter bootloader mode, once
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the board is detected as a USB Mass Storage Device, copy “nuttx.uf2” into
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the device.
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3. To access the console, TX and RX pins must be connected to the
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device such as USB-serial converter.
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Configurations
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==============
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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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usbnsh
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------
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Basic NuttShell configuration using CDC/ACM serial (console enabled in USB Port,
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at 115200 bps).
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combo
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-----
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This configuration enabled NuttShell via Serial and enabled led, gpio and
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ws2812 examples:
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Testing leds:
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.. code-block:: console
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$nsh> leds
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leds_main: Starting the led_daemon
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leds_main: led_daemon started
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led_daemon (pid# 3): Running
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led_daemon: Opening /dev/userleds
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led_daemon: Supported LEDs 0x01
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led_daemon: LED set 0x01
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nsh> led_daemon: LED set 0x00
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led_daemon: LED set 0x01
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led_daemon: LED set 0x00
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led_daemon: LED set 0x01
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led_daemon: LED set 0x00
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Testing gpios:
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======== ====== ==========
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PIN/GPIO Mode Device
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======== ====== ==========
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D0/P0.02 Input /dev/gpio0
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D2/P0.28 Output /dev/gpio1
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D1/P0.03 Input /dev/gpio2
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======== ====== ==========
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.. code-block:: console
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nsh> gpio -w 1 /dev/gpio26
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Driver: /dev/gpio26
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Interrupt pin: Value=0
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Verify: Value=0
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nsh> gpio /dev/gpio27
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Driver: /dev/gpio27
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Input pin: Value=0
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nsh> gpio /dev/gpio27
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Driver: /dev/gpio27
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Input pin: Value=1
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nsh> gpio -o 1 /dev/gpio28
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Driver: /dev/gpio28
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Output pin: Value=0
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Writing: Value=1
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Verify: Value=1
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nsh> gpio -o 0 /dev/gpio28
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Driver: /dev/gpio28
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Output pin: Value=1
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Writing: Value=0
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Verify: Value=0
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Testing ws2812:
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.. code-block:: console
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$nsh> ws2812
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