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SAM4L: Extend interrupt support for the larger number of NVIC interrupts of the SAM4L

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Gregory Nutt 2013-06-09 13:00:38 -06:00
parent 23be751f2d
commit 8d3a536815
1 changed files with 54 additions and 3 deletions
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<h1><big><font color="#3c34ec"><i>NuttX RTOS</i></font></big></h1>
<p>Last Updated: May 29, 2013</p>
<p>Last Updated: June 9, 2013</p>
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<li><a href="#arm926ejs">ARM926EJS</a> (3) </li>
<li><a href="#armcortexm0">ARM Cortex-M0/M0+</a> (2)</li>
<li><a href="#armcortexm3">ARM Cortex-M3</a> (19)</li>
<li><a href="#armcortexm4">ARM Cortex-M4</a> (7)</li>
<li><a href="#armcortexm4">ARM Cortex-M4</a> (8)</li>
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<li>Atmel AVR
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<li><a href="#avrat90usbxxx">AVR AT90USB64x and AT90USB6128x</a> <small>(8-bit AVR)</small></li>
<li><a href="#at32uc3bxxx">AVR32 AT32UC3BXXX</a> <small>(32-bit AVR32)</small></li>
<li><a href="#at91sam3u">Atmel AT91SAM3U</a> <small>(ARM Cortex-M3)</small></li>
<li><a href="#at91sam4l">Atmel AT91SAM4L</a> <small>(ARM Cortex-M4)</small></li>
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<li>Freescale
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<p>
<b>STATUS:</b>
As of this writing, the basic port is code complete and fully verified configurations exit for the basic NuttX OS test and for the NuttShell <a href="http://www.nuttx.org/Documentation/NuttShell.html">NSH</a>).
As of this writing, the basic port is code complete and fully verified configurations exist for the basic NuttX OS test and for the NuttShell <a href="http://www.nuttx.org/Documentation/NuttShell.html">NSH</a>).
The first fully functional LM4F120 LaunchPad port was released in NuttX-6.27.
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<p>
<a name="at91sam4l"><b>Atmel AT91SAM4L</b>.</a>
This port uses the Atmel SAM4L Xplained Pro development board.
This board features the ATSAM4LC4C MCU with 256KB of FLASH and 32KB of internal SRAM.
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<ul>
<p>
<b>STATUS:</b>
As of this writing, the basic port is code complete and fully verified configurations exist for the basic NuttX OS test and for the NuttShell <a href="http://www.nuttx.org/Documentation/NuttShell.html">NSH</a>).
The first fully functional LM4F120 LaunchPad port was released in NuttX-6.28.
</p>
<p>
<b>Memory Usage</b>.
The ATSAM4LC4C comes in a 61004-pin package and has 256KB FLASH and 32KB of SRAM.
Below is the current memory usage for the NSH configuration (June 9, 2013).
This is <i>not</i> a minimal implementation, but a full-featured NSH configuration.
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<p>
Static memory usage can be shown with <code>size</code> command:
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<ul><pre>
$ size nuttx
text data bss dec hex filename
43572 122 2380 46074 b3fa nuttx
</pre></ul>
<p>
NuttX, the NSH application, and GCC libraries use 42.6KB of FLASH leaving 213.4B of FLASH (83.4%) free from additional application development.
Static SRAM usage is about 2.3KB (&lt;7%) and leaves 29.7KB (92.7%) available for heap at runtime.
</p>
SRAM usage at run-time can be shown with the NSH <code>free</code> command.
This runtime memory usage includes the static memory usage <i>plus</i> all dynamic memory allocation for things like stacks and I/O buffers:
<ul><pre>
NuttShell (NSH) NuttX-6.28
nsh> free
total used free largest
Mem: 29232 5920 23312 23312
</pre></ul>
<p>
You can see that 22.8KB (71.1%) of the SRAM heap is staill available for further application development while NSH is running.
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