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Fix STM32L15X vector definitions; Fix STM32L-Discovery LED controls. The NSH configuration is now fully functional on the STM32L-Discovery board.

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Gregory Nutt 2013-05-21 11:25:30 -06:00
parent 7c5c34237c
commit a5251ec2ef
1 changed files with 66 additions and 3 deletions
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Documentation/NuttX.html
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@ -8,7 +8,7 @@
<tr align="center" bgcolor="#e4e4e4">
<td>
<h1><big><font color="#3c34ec"><i>NuttX RTOS</i></font></big></h1>
<p>Last Updated: May 6, 2013</p>
<p>Last Updated: May 21, 2013</p>
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</table>
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<li><a href="#arm920t">ARM920T</a> (1) </li>
<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> (17)</li>
<li><a href="#armcortexm3">ARM Cortex-M3</a> (18)</li>
<li><a href="#armcortexm4">ARM Cortex-M4</a> (7)</li>
</ul>
<li>Atmel AVR
@ -1906,7 +1906,7 @@ $ size 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 (&lt;4%) and leaves 13.8KB (86%) available for heap at runtime.
Static SRAM usage is about 1.2KB (&lt;4%) and leaves 14.8KB (86%) available for heap at runtime.
SRAM usage at run-time can be shown with the NSH <code>free</code> command:
</p>
<ul><pre>
@ -2093,6 +2093,69 @@ nsh>
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<td><br></td>
<td><hr></td>
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<td><br></td>
<td>
<p>
<b>STMicro STM32L152 (STM32L &quot;EnergyLite&quot; Line)</b>.
This is a port of NuttX to the STMicro STM32L-Discovery development board.
The STM32L-Discovery board is based on the STM32L152RBT6 MCU (128KB FLASH and 16KB of SRAM).
</p>
<ul>
<p>
The STM32L-Discovery and 32L152CDISCOVERY kits are functionally equivalent.
The difference is the internal Flash memory size (STM32L152RBT6 with 128 Kbytes or STM32L152RCT6 with 256 Kbytes).
Both boards feature:
</p>
<ul>
<li>An ST-LINK/V2 embedded debug tool interface,</li>
<li>LCD (24 segments, 4 commons),</li>
<li>LEDs,</li>
<li>Pushbuttons,</li>
<li>A linear touch sensor, and</li>
<li>Four touchkeys.</li>
</ul>
<p>
<b>STATUS</b>.
Initial support for the STM32L-Discovery was released in NuttX-6.28.
This initial support is very minimal:
There is a configuration using the NuttShell (<a href="NuttShell.html">NSH</a>) that might be the basis for an application development.
As of this writing, more device drivers are needed to make this a more complete port.
</p>
<p>
<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 STM32L152RBT6 demonstrates the scalability of NuttX. The STM32L152RBT6 comes in a 64-pin package and has 128KB FLASH and 16KB of SRAM.
</p>
<p>
Static memory usage can be shown with <code>size</code> command:
</p>
<ul><pre>
$ size nuttx
text data bss dec hex filename
39664 132 1124 40920 9fd8 nuttx
</pre></ul>
<p>
NuttX, the NSH application, and GCC libraries use 38.7KB of FLASH leaving 89.3B of FLASH (70%) free from additional application development.
Static SRAM usage is about 1.2KB (&lt;4%) and leaves 14.8KB (86%) available for heap at runtime.
</p>
SRAM usage at run-time can be shown with the NSH <code>free</code> command:
<ul><pre>
NuttShell (NSH) NuttX-6.27
nsh> free
total used free largest
Mem: 14096 3928 10168 10168
nsh>
</pre></ul>
<p>
You can see that 9.9KB (62%) of SRAM heap is staill available for further application development while NSH is running.
</p>
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<td><hr></td>