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