nuttx/boards/arm/rp2040/raspberrypi-pico
Jiuzhu Dong 59eb4fa8d6 fs: delete NFILE_DESCRIPTORS for allocating dynamically
Change-Id: Id06d215063796d222b9792d25ab2d6742167729f
Signed-off-by: Jiuzhu Dong <dongjiuzhu1@xiaomi.com>
2021-03-17 06:46:42 -07:00
..
configs fs: delete NFILE_DESCRIPTORS for allocating dynamically 2021-03-17 06:46:42 -07:00
include boards/raspberrypi-pico: Support SPI and SD card 2021-03-08 17:06:07 +09:00
scripts
src boards/raspberrypi-pico: Pico Display Pack (ST7789 LCD) support 2021-03-16 06:35:04 -03:00
Kconfig boards/raspberrypi-pico: Support ENC28J60 SPI ethernet board 2021-03-11 19:31:17 -03:00
README.txt boards/raspberrypi-pico: Pico Display Pack (ST7789 LCD) support 2021-03-16 06:35:04 -03:00

README
======

This directory contains the port of NuttX to the Raspberry Pi Pico.
See https://www.raspberrypi.org/products/raspberry-pi-pico/ for information
about Raspberry Pi Pico.

Currently only the following devices are suppored.

  Supported:
  - UART  (console port)
    - GPIO 0 (UART0 TX) and GPIO 1 (UART0 RX) are used for the console.
  - I2C
  - SPI
  - DMAC
  - Flash ROM Boot
  - SRAM Boot
    - If Pico SDK is available, nuttx.uf2 file which can be used in
      BOOTSEL mode will be created.
  - BMP180 sensor at I2C0 (don't forget to define I2C0 GPIOs at "I2C0 GPIO pin assign" in Board Selection menu)
  - INA219 sensor / module (don't forget to define I2C0 GPIOs at "I2C0 GPIO pin assign" in Board Selection menu)
  - Pico Display Pack (ST7789 LCD)
    - RGB leds and buttons are not supported yet.

  Not supported:
  - All other devices

Installation
============

1. Download Raspberry Pi Pico SDK

  $ git clone -b master https://github.com/raspberrypi/pico-sdk.git

2. Set PICO_SDK_PATH environment variable

  $ export PICO_SDK_PATH=<absolute_path_to_pico-sdk_directory>

3. Configure and build NuttX

  $ git clone https://github.com/apache/incubator-nuttx.git nuttx
  $ git clone https://github.com/apache/incubator-nuttx-apps.git apps
  $ cd nuttx
  $ make distclean
  $ ./tools/configure.sh raspberrypi-pico:nsh
  $ make V=1

4. Connect Raspberry Pi Pico board to USB port while pressing BOOTSEL.
   The board will be detected as USB Mass Storage Device.
   Then copy "nuttx.uf2" into the device.
   (Same manner as the standard Pico SDK applications installation.)

5. To access the console, GPIO 0 and 1 pins must be connected to the
   device such as USB-serial converter.

Defconfigs
==========

- nsh
    Minimum configuration with NuttShell

- nshsram
    Load NuttX binary to SRAM
  
- smp
    Enable SMP mode. Both Core 0 and Core 1 are used by NuttX.

- ssd1306
    SSD1306 OLED display (I2C) test configuration
    Connection:
       SSD1306       Raspberry Pi Pico
           GND ----- GND            (Pin 3 or 38 or ...)
           VCC ----- 3V3 OUT        (Pin 36)
           SDA ----- GP4 (I2C0 SDA) (Pin 6)
           SCL ----- GP5 (I2C0 SCL) (Pin 7)

- spisd
    SD card support (SPI connection)
    Connection:
      SD card slot   Raspberry Pi Pico
       DAT2          (NC)
       DAT3/CS ----- GP17 (SPI0 CSn) (Pin 22)
       CMD /DI ----- GP19 (SPI0 TX)  (Pin 25)
       VDD     ----- 3V3 OUT         (Pin 36)
       CLK/SCK ----- GP18 (SPI0 SCK) (Pin 24)
       VSS     ----- GND             (Pin 3 or 38 or ...)
       DAT0/DO ----- GP16 (SPI0 RX)  (Pin 21)
       DAT1          (NC)
    * Card hot swapping is not supported.

- enc28j60
    ENC28J60 SPI ethernet controller support
      - IP address is configured by DHCP.
      - DNS address is 8.8.8.8 (CONFIG_NETINIT_DNSIPADDR)
      - NTP client is enabled.
    Connection:
      ENC28J60       Raspberry Pi Pico
           GND ----- GND             (Pin 3 or 38 or ...)
           3.3 ----- 3V3 OUT         (Pin 36)
            SI ----- GP15 (SPI1 TX)  (Pin 20)
           SCK ----- GP14 (SPI1 SCK) (Pin 19)
            CS ----- GP13 (SPI1 CSn) (Pin 17)
            SO ----- GP12 (SPI1 RX)  (Pin 16)
           INT ----- GP11            (Pin 15)
         RESET ----- GP10            (Pin 14)

- displaypack
    Pico Display Pack support
    See the following page for connection:
      https://shop.pimoroni.com/products/pico-display-pack

License exceptions
==================

The following files are originated from the files in Pico SDK.
So, the files are licensed under 3-Clause BSD same as Pico SDK.

- arch/arm/src/rp2040/rp2040_clock.c
- arch/arm/src/rp2040/rp2040_pll.c
- arch/arm/src/rp2040/rp2040_xosc.c
  - These are created by referring the Pico SDK clock initialization.

- arch/arm/src/rp2040/hardware/*.h
  - These are generated from rp2040.svd originally provided in Pico SDK.