2022-07-01 22:23:35 +02:00
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========
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rp2040
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========
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The rp2040 is a dual core chip produced by the RaspberryPi Foundation that
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is based on ARM Cortex-M0+.
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Peripheral Support
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==================
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The following list indicates peripherals currently supported in NuttX:
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============== =====
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Peripheral Notes
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============== =====
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GPIO See Supported Boards documentation for available pins.
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UART GPIO 0 (UART0 TX) and GPIO 1 (UART0 RX) are used for the console.
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I2C
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SPI
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DMAC
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PWM
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USB
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PIO RP2040 Programmable I/O
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IRQs
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DMA
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ws2812 Smart pixels (e.g. Neopixel)
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Flash ROM Boot
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SRAM Boot If Pico SDK is available a nuttx.uf2 file will be created
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BMP180 Requires I2C0
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INA219 Requires I2C0
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============== =====
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The Pico Display Pack (ST7789 LCD) and Pico Audio Pack (PCM5100A I2S DAC) are
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also available.
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Installation
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============
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1. Download Raspberry Pi Pico SDK::
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git clone -b 1.1.2 https://github.com/raspberrypi/pico-sdk.git
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2. Set PICO_SDK_PATH environment variable::
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export PICO_SDK_PATH=<absolute_path_to_pico-sdk_directory>
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3. Download NuttX and the companion applications. These must both be
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contained in the same directory::
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2022-11-22 19:59:48 +01:00
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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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2022-07-01 22:23:35 +02:00
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Building NuttX
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==============
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1. Change to NuttX directory::
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cd nuttx
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2. Select a configuration. The available configurations
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can be listed with the command::
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./tools/configure.sh -L
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3. Load the selected configuration.::
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make distclean
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./tools/configure.sh <selected_configuration>
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4. Modify the configuration as needed (optional)::
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make menuconfig
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5. Build NuttX::
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make
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Programming
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============
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Programming using BOOTSEL
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-------------------------
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Connect board to USB port while pressing BOOTSEL.
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The board will be detected as USB Mass Storage Device.
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Then copy "nuttx.uf2" into the device.
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(Same manner as the standard Pico SDK applications installation.)
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Programming using SDB
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---------------------
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Most (but no all) RP2040 boards provide a serial (SDB) debug port.
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The "nuttx" ELF file can be uploaded with an appropriate SDB programmer
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module and companion software.
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Running NuttX
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=============
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Most builds provide access to the console via UART0. To access this
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GPIO 0 and 1 pins must be connected to the device such as USB-serial converter.
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The `usbnsh` configuration provides the console access by USB CDC/ACM serial
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devcice. The console is available by using a terminal software on the USB host.
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Supported Boards
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================
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.. toctree::
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:glob:
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:maxdepth: 1
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boards/*/*
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