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--- proiecte:nuttx-sparrow [2018/11/22 22:42]
razvan.barbascu created
+++ proiecte:nuttx-sparrow [2018/11/22 23:47] (current)
razvan.barbascu [Setup]
@@ Line 5: / Line 5: @@
 ===== Hardware =====
-If you are not familiar with Sparrow you can find more about it [[:sparrow_v4_en|Sparrow Wireless Sensor Node]]
+If you are not familiar with Sparrow you can find more about it here: [[:sparrow_v4_en|Sparrow Wireless Sensor Node]].
 ===== NuttX =====
+[[http://nuttx.org/|Nuttx]] is n RTOS with an emphasis on standards compliance and small footprint. Scalable from 8-bit to 32-bit micro controller environments, the primary governing standards in NuttX are Posix and ANSI standards.
+Nuttx is very flexible when it comes to communication protocols.
+It support a large range of protocols from low power ones like 6LoWPAN for radio network drivers (IEEE 802.15.4 MAC and generic packet radios), Radio Network Drivers: IEEE 802.15.4 MAC, Generic Packet Radio, Bluetooth LE. But also more advanced protocols like IEEE 802.11 FullMac, IPv4, IPv6, TCP/IP, UDP, ARP, ICMP, ICMPv6, IGMPv2 (client) stacks.
+Memory allocation on this RTOS is grouped into standard heap memory allocation, granule allocator, shared memory, and dynamically sized, per-process heaps. Depending on what platform you chose to run Nuttx, you can adapt this memory allocator to use the appropriate amount of memory.
+This RTOS is made to be portable and works most of the ARM processors, 8-bit Atmel architecture and more. It also has a large number of drivers already implemented, but it has not yet been ported to the Sparrow's microcontroller, ATmega128RFA1.
+When it comes to multi-threading and scheduling, Nuttx is the most advanced one, having implemented a few scheduling algorithms like FIFO, round-robin, and “sporadic” scheduling.
+NuttX uses a flash aware file system which handles all the operations with the memory and makes it transparent to the user. It is a filesystem that has been designed to work primary with small, serial NOR type flash parts that are 1M byte to 16M byte in size (though this is not a limitation). The filesystem operates by segmenting the flash (or flash partition) into “logical sectors” of equal size and then managing them (allocating, mapping, chaining, releasing, etc.) to build files and directories.
+Nuttx also provides an optional small, scalable, bash-like shell with rich feature set and small footprint used for debugging, configuration and launching applications.
 ===== Setup =====
+<code bash Install Packets>
+sudo apt-get install build-essential git texinfo libgmp-dev libmpfr-dev libmpc-dev libncurses5-dev bison flex gettext gperf libtool autoconf pkg-config libftdi-dev libusb-1.0-0-dev zlib1g zlib1g-dev python-yaml gcc-avr avr-libc avrdude
+</code>
+<code bash Install NuttX Tools>
+clone tools repo: https://github.com/jodersky/nuttx/tree/master/misc/tools
+cd tools/kconfig-frontends
+./configure --enable-mconf
+LD_RUN_PATH=/usr/local/lib
+make
+make install
+</code>
+<code bash Get NuttX for Sparrow>
+git clone git@bitbucket.org:vanbarbascu/nuttx_sparrow.git
+cd nuttx_sparrow
+</code>
+<code bash Configure and Build>
+LD_LIBRARY_PATH=/usr/local/lib/ tools/configure.sh -l -a apps sparrow_4.1/nsh
+make
+</code>
+<code bash Flash to board>
+tools/flash.sh --port /dev/ttyUSB0
+</code>
+Connecting to the serial port gives us the NuttxShell.
+<code >
+screen /dev/ttyUSB0
+</code>
 ===== Bibliography =====
+[[http://www.nuttx.org/Documentation/NuttxPortingGuide.html#Introduction|NuttX porting guide]]
+[[https://clkdiv8.com/wiki/doku.php|Sparrow Wireless Sensor Node]]

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