NuttXお試しメモ

memo_nuttx.rd

= NuttXお試しメモ
[2021-09-18 19:11]

<<<NuttX
<<<RTOS

== シミュレータ

https://nuttx.apache.org/docs/latest/quickstart/install.html
https://nuttx.apache.org/docs/latest/guides/simulator.html

```
$ sudo apt install \
bison flex gettext texinfo libncurses5-dev libncursesw5-dev \
gperf automake libtool pkg-config build-essential gperf genromfs \
libgmp-dev libmpc-dev libmpfr-dev libisl-dev binutils-dev libelf-dev \
libexpat-dev gcc-multilib g++-multilib picocom u-boot-tools util-linux \
kconfig-frontends gcc-arm-none-eabi binutils-arm-none-eabi
$ mkdir nuttx
$ cd nuttx
$ git clone https://github.com/apache/incubator-nuttx.git nuttx
$ git clone https://github.com/apache/incubator-nuttx-apps apps
$ cd nuttx
$ ./tools/configure.sh sim:nsh
$ make
$ ./nuttx
login: admin
password: Administrator
User Logged-in!

NuttShell (NSH) NuttX-10.1.0
MOTD: username=admin password=Administrator
nsh> help
help usage:  help [-v] [<cmd>]

  .         cd        echo      hexdump   mkfatfs   pwd       source    unset     
  [         cp        exec      kill      mkrd      readlink  test      usleep    
  ?         cmp       exit      losetup   mount     rm        time      xd        
  basename  dirname   false     ln        mv        rmdir     true      
  break     dd        free      ls        poweroff  set       uname     
  cat       df        help      mkdir     ps        sleep     umount    

Builtin Apps:
  hello  nsh    sh     
nsh> mount
  /bin type binfs
  /etc type romfs
  /proc type procfs
  /tmp type vfat
$ pkill nuttx
```

setcapするとTCP/IPが使えるらしい

== ROM/RAM使用量調査

=== 結論

ROM: NuttXの方が50kB程度大きい
RAM: xxx ChibiOS/RTはヒープ用にBSSをコンパイル時に確保する？

=== NuttX

ROM: 94-186 kB
RAM: 2-30 kB

```
$ ./tools/configure.sh -L | grep lpc1768
  lpcxpresso-lpc1768:dhcpd
  lpcxpresso-lpc1768:usbmsc
  lpcxpresso-lpc1768:nx
  lpcxpresso-lpc1768:thttpd
  lpcxpresso-lpc1768:nsh
$ ./tools/configure.sh lpcxpresso-lpc1768:nsh
$ make
$ size nuttx
   text    data     bss     dec     hex filename
 107388     292    9880  117560   1cb38 nuttx
```

```
$ ./tools/configure.sh -L | grep stm32f746g
  stm32f746g-disco:netnsh
  stm32f746g-disco:nxterm
  stm32f746g-disco:nsh
  stm32f746g-disco:fb
  stm32f746g-disco:nxdemo
  stm32f746g-disco:audio
  stm32f746g-disco:lvgl
$ ./tools/configure.sh stm32f746g-disco:nsh
$ make
$ size nuttx
   text    data     bss     dec     hex filename
  95639     112    1964   97715   17db3 nuttx
```

```
$ ./tools/configure.sh -L | grep netnsh | grep stm32
  stm32f746g-disco:netnsh
  stm32f769i-disco:netnsh
  olimex-stm32-e407:netnsh
  viewtool-stm32f107:netnsh
  stm32f4discovery:netnsh
$ ./tools/configure.sh stm32f746g-disco:netnsh
$ make
$ size nuttx
   text    data     bss     dec     hex filename
 190120     508   29936  220564   35d94 nuttx
```

=== ChibiOS/RT

ROM: 6,42-122 kB
RAM: 0.8,8-962 kB

```
$ cd demos/AVR/NIL-ARDUINO-UNO
$ make
$ size `find . -name "*.elf"`
   text    data     bss     dec     hex filename
   6010      96     688    6794    1a8a ./build/ch.elf
```

```
$ cd demos/STM32/NIL-STM32F051-DISCOVERY
$ make
$ size `find . -name "*.elf"`
   text    data     bss     dec     hex filename
  43020     128    8064   51212    c80c ./build/ch.elf
```

```
$ cd demos/STM32/NIL-STM32F746G-DISCOVERY
$ make
$ size `find . -name "*.elf"`
   text    data     bss     dec     hex filename
  44640     128  266704  311472   4c0b0 ./build/ch.elf
$ nm build/ch.elf | sort -n
--snip--
20000960 b wa1Thread1
20001128 b wa_common
20001250 B __bss_end__
20001250 ? __ram3_clear__
20001250 ? __ram3_free__
20001250 ? __ram3_init__
20001250 ? __ram3_noinit__
20010000 A __ram3_end__
20010000 B __ram0_base__
20010000 B __ram1_base__
20010000 D __data_base__
20010000 d es1
20010000 ? __ram1_clear__
20010000 ? __ram1_free__
20010000 ? __ram1_init__
20010000 ? __ram1_noinit__
20010004 d es2
20010008 d gmp1
20010050 d myobj.1
20010054 d pipe1
20010080 B __heap_base__
20010080 D __data_end__
20010080 ? __ram0_clear__
20010080 ? __ram0_free__
20010080 ? __ram0_init__
20010080 ? __ram0_noinit__
20050000 A __ram0_end__
20050000 A __ram2_end__
20050000 B __heap_end__
40024000 B __ram5_base__
40024000 ? __ram5_clear__
40024000 ? __ram5_free__
40024000 ? __ram5_init__
40024000 ? __ram5_noinit__
40025000 A __ram5_end__
```

```
$ git grep STM32F476 demos/
demos/STM32/RT-STM32-LWIP-FATFS-USB-HTTPS/readme.txt:The demo runs on a STM32F476-Discovery board.
$ cd demos/STM32/RT-STM32-LWIP-FATFS-USB-HTTPS
$ make
$ size `find . -name "*.elf"`
   text    data     bss     dec     hex filename
 123896     232  430504  554632   87688 ./build/stm32f769_discovery/ch.elf
 123976     232  299432  423640   676d8 ./build/stm32f746_discovery/ch.elf
 123744     232   65304  189280   2e360 ./build/stm32f107_goldbull/ch.elf
 123084     232  130840  254156   3e0cc ./build/stm32f407_olimex/ch.elf
```