144 lines
5.8 KiB
ReStructuredText
144 lines
5.8 KiB
ReStructuredText
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===============
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Microchip SAM34
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===============
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Microchip SAM3U
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---------------
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This port uses the `Microchip <http://www.atmel.com/>`__
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SAM3U-EK development board that features the SAM3U4E MCU. This port uses
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a GNU arm-nuttx-elf or arm-nuttx-eabi toolchain\* under either Linux or
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Cygwin (with native Windows GNU tools or Cygwin-based GNU tools).
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**Development Environments:** 1) Linux with native Linux GNU toolchain,
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2) Cygwin/MSYS with Cygwin GNU toolchain, 3) Cygwin/MSYS with Windows
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native toolchain (CodeSourcery or devkitARM), or 4) Native Windows. A
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DIY toolchain for inux or Cygwin is provided by the NuttX
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`buildroot <https://bitbucket.org/nuttx/buildroot/downloads/>`__
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package.
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Microchip SAM3X
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---------------
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There are two SAM3X boards supported:
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#. The `Arduino <http://arduino.cc//>`__ Due development board that
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features the ATSAM3X8E MCU running at 84MHz. See the `Arduino
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Due <http://arduino.cc/en/Main/arduinoBoardDue>`__ page for more
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information.
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#. The Mikroelektronika `Flip&Click
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SAM3X <https://www.mikroe.com/flip-n-click-sam3x>`__ development
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board. This board is an Arduino Due *work-alike* with additional
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support for 4 mikroBUS Click boards.
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**Development Environments:** See the Microchip SAM3U discussion
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`above. <#at91sam3u>`__
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Microchip SAM4L
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---------------
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This port uses the Microchip SAM4L Xplained Pro development
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board. This board features the ATSAM4LC4C MCU running at 48MHz with
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256KB of FLASH and 32KB of internal SRAM.
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**STATUS:** As of this writing, the basic port is code complete and a
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fully verified configuration exists for the NuttShell
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:ref:`NSH <nsh>`). The first
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fully functional SAM4L Xplained Pro port was released in NuttX-6.28.
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Support for the SAM4L Xplained modules was added in NuttX-6.29:
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- Support for the SPI-based SD card on the I/O1 module.
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- Driver for the LED1 segment LCD module.
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- Support for the UG-2832HSWEG04 OLED on the SAM4L Xplained Pro's OLED1
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module
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Refer to the NuttX board
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`README <https://github.com/apache/nuttx/blob/master/boards/arm/sam34/sam4l-xplained/README.txt>`__
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file for further information.
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**Memory Usage**. The ATSAM4LC4C comes in a 100-pin package and has
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256KB FLASH and 32KB of SRAM. Below is the current memory usage for the
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NSH configuration (June 9, 2013). This is *not* a minimal
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implementation, but a full-featured NSH configuration.
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Static memory usage can be shown with ``size`` command:
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NuttX, the NSH application, and GCC libraries use 42.6KB of FLASH
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leaving 213.4B of FLASH (83.4%) free from additional application
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development. Static SRAM usage is about 2.3KB (<7%) and leaves 29.7KB
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(92.7%) available for heap at runtime.
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SRAM usage at run-time can be shown with the NSH ``free`` command. This
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runtime memory usage includes the static memory usage *plus* all dynamic
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memory allocation for things like stacks and I/O buffers:
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You can see that 22.8KB (71.1%) of the SRAM heap is still available for
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further application development while NSH is running.
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Microchip SAM4CM
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----------------
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General architectural support was provided for SAM4CM
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family in NuttX 7.3 This was *architecture-only* support, meaning that
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support for the boards with these chips is available, but no support for
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any publicly available boards was included. The SAM4CM port should be
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compatible with most of the SAM3/4 drivers (like HSMCI, DMAC, etc.) but
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those have not be verified on hardware as of this writing. This support
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was contributed in part by Max Neklyudov.
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**Microchip SAM4CMP-DB**. Support for the SAM4CMP-DB board was contributed
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to NuttX by Masayuki Ishikawa in NuttX-7.19. The SAM4CM is a dual-CPU
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part and SMP was included for the ARMv7-M and SAM3/4 families. The
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SAM4CMP-DB board support includes an NSH configuration that operates in
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an SMP configuration. Refer to the NuttX board
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`README <https://github.com/apache/nuttx/blob/master/boards/arm/sam34/sam4cmp-db/README.txt>`__
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file for further information.
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Microchip SAM4E
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---------------
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General architectural support was provided for the SAM4E
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family in NuttX 6.32. This was *architecture-only* support, meaning that
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support for the boards with these chips is available, but no support for
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any publicly available boards was included. This support was contributed
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in part by Mitko.
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**Microchip SAM4E-EK**. Board support was added for the SAM4E-EK development
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board in NuttX 7.1. A fully functional NuttShell (NSH) configuration is
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available (see :ref:`NSH <nsh>`). That NSH
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configuration includes networking support and support for an AT25 Serial
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FLASH file system.
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Microchip SAM4S
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---------------
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There are ports to two Microchip SAM4S board:
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- There is a port the Microchip SAM4S Xplained development board. This
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board features the ATSAM4S16 MCU running at 120MHz with 1MB of FLASH
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and 128KB of internal SRAM.
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- There is also a port to the Microchip SAM4S Xplained *Pro* development
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board. This board features the ATSAM4S32C MCU running at 120MHz with
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2MB of FLASH and 160KB of internal SRAM.
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Microchip SAM4E. General architectural support was provided for the SAM4E
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family in NuttX 6.32. This was *architecture-only* support, meaning that
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support for the boards with these chips is available, but no support for
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any publicly available boards was included. This support was contributed
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in part by Mitko.
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**Microchip SAM4E-EK**. Board support was added for the SAM4E-EK development
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board in NuttX 7.1. A fully functional NuttShell (NSH) configuration is
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available (see :ref:`NSH <nsh>`). That NSH
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configuration includes networking support and support for an AT25 Serial
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FLASH file system.
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**Development Environments:** 1) Linux with native Linux GNU toolchain,
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2) Cygwin/MSYS with Cygwin GNU Cortex-M3 or 4 toolchain, 3) Cygwin/MSYS
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with Windows native GNU Cortex-M3 or M4 toolchain (CodeSourcery or
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devkitARM), or 4) Native Windows. A DIY toolchain for Linux or Cygwin is
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provided by the NuttX
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`buildroot <https://bitbucket.org/nuttx/buildroot/downloads/>`__
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package.
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