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nuttx/configs/spresense
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Gregory Nutt abf6965c24 Squashed commit of the following: 
libs/:  Remove references to CONFIG_DISABLE_SIGNALS.  Signals can no longer be disabled.
    syscall/:  Remove references to CONFIG_DISABLE_SIGNALS.  Signals can no longer be disabled.
    wireless/:  Remove references to CONFIG_DISABLE_SIGNALS.  Signals can no longer be disabled.
    Documentation/:  Remove references to CONFIG_DISABLE_SIGNALS.  Signals can no longer be disabled.
    include/:  Remove references to CONFIG_DISABLE_SIGNALS.  Signals can no longer be disabled.
    drivers/:  Remove references to CONFIG_DISABLE_SIGNALS.  Signals can no longer be disabled.
    sched/:  Remove references to CONFIG_DISABLE_SIGNALS.  Signals can no longer be disabled.
    configs:  Remove references to CONFIG_DISABLE_SIGNALS.  Signals can no longer be disabled.
    arch/xtensa:  Remove references to CONFIG_DISABLE_SIGNALS.  Signals can no longer be disabled.
    arch/z80:  Remove references to CONFIG_DISABLE_SIGNALS.  Signals can no longer be disabled.
    arch/x86:  Remove references to CONFIG_DISABLE_SIGNALS.  Signals can no longer be disabled.
    arch/renesas and arch/risc-v:  Remove references to CONFIG_DISABLE_SIGNALS.  Signals can no longer be disabled.
    arch/or1k:  Remove all references to CONFIG_DISABLE_SIGNALS.  Signals are always enabled.
    arch/misoc:  Remove all references to CONFIG_DISABLE_SIGNALS.  Signals are always enabled.
    arch/mips:  Remove all references to CONFIG_DISABLE_SIGNALS.  Signals are always enabled.
    arch/avr:  Remove all references to CONFIG_DISABLE_SIGNALS.  Signals are always enabled.
    arch/arm:  Remove all references to CONFIG_DISABLE_SIGNALS.  Signals are always enabled.
2019-04-29 14:52:05 -06:00
..
include
nsh
scripts
src
Kconfig
README.txt

README.txt

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README
======

Spresense is a compact development board based on Sony’s power-efficient
multicore microcontroller CXD5602. It allows developers to create IoT
applications in a very short time and is supported by the Arduino IDE as well
as the more advanced NuttX based SDK.

- Integrated GPS
  The embedded GNSS with support for GPS, QZSS and GLONASS enables applications
  where tracking is required.
- Hi-res audio output and multi mic inputs
  Advanced 192kHz/24 bit audio codec and amplifier for audio output, and
  support for up to 8 mic input channels.
- Multicore microcontroller
  Spresense is powered by Sony's CXD5602 microcontroller (ARM® Cortex®-M4F × 6
  cores), with a clock speed of 156 MHz.

Refer to https://developer.sony.com/develop/spresense/ for further information
about this board.