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| author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2013-03-01 19:10:02 +0000 |
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| committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2013-03-01 19:10:02 +0000 |
| commit | 7b9858c44c827799d2d4c898fc081b907bce7b49 (patch) | |
| tree | 1764a99eb1971176a2b242949ec23c742b46dd83 /nuttx/Documentation/NuttX.html | |
| parent | 632648b224dfcefbf70347d7fb3a60d8f6e7fad4 (diff) | |
| download | nuttx-7b9858c44c827799d2d4c898fc081b907bce7b49.tar.gz nuttx-7b9858c44c827799d2d4c898fc081b907bce7b49.tar.bz2 nuttx-7b9858c44c827799d2d4c898fc081b907bce7b49.zip | |
Add a configuration to begin development of an LM4F120 LaunchPad port
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5692 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/Documentation/NuttX.html')
| -rw-r--r-- | nuttx/Documentation/NuttX.html | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/nuttx/Documentation/NuttX.html b/nuttx/Documentation/NuttX.html index e7fa65981..435540f44 100644 --- a/nuttx/Documentation/NuttX.html +++ b/nuttx/Documentation/NuttX.html @@ -2017,16 +2017,33 @@ svn checkout -r5595 http://svn.code.sf.net/p/nuttx/code/trunk nuttx-code As of this writing, more device drivers are needed to make this a more complete port. </p> <p> - For a full-featured RTOS such as NuttX, providing support in a usable and meaningful way within the tiny memories of the NUC120 demonstrates the scalability of NuttX (128KB FLASH and 16KB of SRAM in a 48-pin package). - When running the NSH configuration (a full up application), there is still more than 9KB or SRAM available: + <b>Memory Usage</b>. + For a full-featured RTOS such as NuttX, providing support in a usable and meaningful way within the tiny memories of the NUC120 demonstrates the scalability of NuttX. The NUC120LE2AN comes in a 48-pin package and has 128KB FLASH and 16KB of SRAM. + When running the NSH configuration (itself a full up application), there is still more than 90KB of FLASH and 10KB or SRAM available for further application development). + </p> + <p> + Static memory usage can be shown with <code>size</code> command: + </p> + <ul><pre> +$ size nuttx + text data bss dec hex filename + 35037 106 1092 36235 8d8b nuttx +</pre></ul> + <p> + NuttX, the NSH application, and GCC libraries use 34.2KB of FLASH leaving 93.8KB of FLASH (72%) free from additional application development. + Static SRAM usage is about 1.2KB (<4%) and leaves 13.8KB (86%) available for heap at runtime. + SRAM usage at run-time can be shown with the NSH <code>free</code> command: </p> <ul><pre> NuttShell (NSH) NuttX-6.26 nsh> free total used free largest -Mem: 13344 3944 9400 9400 +Mem: 14160 3944 10216 10216 nsh> - </ul> +</pre></ul> + <p> + You can see that 10.0KB (62%) is available for further application development. + </p> <p> <b>Development Environments:</b> 1) Linux with native Linux GNU toolchain, 2) Cygwin/MSYS with Cygwin GNU toolchain, 3) Cygwin/MSYS |