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Add the beginning of an STM32 CAN driver 

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4209 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo 2011-12-21 15:50:06 +00:00
parent 35333b9e58
commit 3fced8cf04
1 changed files with 53 additions and 7 deletions
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60
Documentation/NuttxPortingGuide.html
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@ -12,7 +12,7 @@
<h1><big><font color="#3c34ec">
<i>NuttX RTOS Porting Guide</i>
</font></big></h1>
<p>Last Updated: December 19, 2011</p>
<p>Last Updated: December 21, 2011</p>
</td>
</tr>
</table>
@ -127,7 +127,8 @@
<a href="#usbhostdrivers">6.3.9 USB Host-Side Drivers</a><br>
<a href="#usbdevdrivers">6.3.10 USB Device-Side Drivers</a><br>
<a href="#analogdrivers">6.3.11 Analog (ADC/DAC) Drivers</a><br>
<a href="#pwmdrivers">6.3.12 PWM Drivers</a>
<a href="#pwmdrivers">6.3.12 PWM Drivers</a><br>
<a href="#candrivers">6.3.13 CAN Drivers</a>
</ul>
<a href="#pwrmgmt">6.4 Power Management</a>
<ul>
@ -3212,23 +3213,55 @@ extern void up_ledoff(int led);
A &quot;lower half&quot;, platform-specific driver that implements the low-level timer controls to implement the PWM functionality.
</li>
</ol>
<p>
Files supporting PWM can be found in the following locations:
</p>
<ul>
<li>
<li><b>Interface Definition</b>.
The header file for the NuttX PWM driver reside at <code>include/nuttx/pwm.h</code>.
This header file includes both the application level interface to the PWM driver as well as the interface between the &quot;upper half&quot; and &quot;lower half&quot; drivers.
The PWM module uses a standard character driver framework.
However, since the PWM driver is a devices control interface and not a data transfer interface,
the majority of the functionality available to the application is implemented in driver ioctl calls.
</li>
<li>
<li><b>&quot;Upper Half&quot; Driver</b>.
The generic, &quot;upper half&quot; PWM driver resides at <code>drivers/pwm.c</code>.
</li>
<li>
Platform-specific PWM drivers reside in <code>arch/</code><i>&lt;architecture&gt;</i><code>/src/</code><i>&lt;chip&gt;</i> directory for the specific processor <i>&lt;architecture&gt;</i> and for the specific <i>&lt;chip&gt;</i> analog peripheral devices.
<li><b>&quot;Lower Half&quot; Drivers</b>.
Platform-specific PWM drivers reside in <code>arch/</code><i>&lt;architecture&gt;</i><code>/src/</code><i>&lt;chip&gt;</i> directory for the specific processor <i>&lt;architecture&gt;</i> and for the specific <i>&lt;chip&gt;</i> PWM peripheral devices.
</li>
</ul>
<h3><a name="candrivers">6.3.13 CAN Drivers</a></h3>
<p>
NuttX supports only a very low-level CAN driver.
This driver supports only the data exchange and does not include any high-level CAN protocol.
The NuttX CAN driver is split into two parts:
</p>
<ol>
<li>
An &quot;upper half&quot;, generic driver that provides the comman CAN interface to application level code, and
</li>
<li>
A &quot;lower half&quot;, platform-specific driver that implements the low-level timer controls to implement the CAN functionality.
</li>
</ol>
<p>
Files supporting CAN can be found in the following locations:
</p>
<ul>
<li><b>Interface Definition</b>.
The header file for the NuttX CAN driver reside at <code>include/nuttx/can.h</code>.
This header file includes both the application level interface to the CAN driver as well as the interface between the &quot;upper half&quot; and &quot;lower half&quot; drivers.
The CAN module uses a standard character driver framework.
</li>
<li><b>&quot;Upper Half&quot; Driver</b>.
The generic, &quot;upper half&quot; CAN driver resides at <code>drivers/can.c</code>.
</li>
<li><b>&quot;Lower Half&quot; Drivers</b>.
Platform-specific CAN drivers reside in <code>arch/</code><i>&lt;architecture&gt;</i><code>/src/</code><i>&lt;chip&gt;</i> directory for the specific processor <i>&lt;architecture&gt;</i> and for the specific <i>&lt;chip&gt;</i> CAN peripheral devices.
</li>
</ul>
<h2><a name="pwrmgmt">6.4 Power Management</a></h2>
@ -4332,6 +4365,19 @@ build
</li>
</ul>
<h3>CAN driver</h3>
<ul>
<li>
<code>CONFIG_CAN</code>: Enables CAN support
</li>
<li>
<code>CONFIG_CAN_FIFOSIZE</code>: The size of the circular buffer of CAN messages. Default: 8
</li>
<li>
<code>CONFIG_CAN_NPENDINGRTR</code>: The size of the list of pending RTR requests. Default: 4
</li>
</ul>
<h3>SPI driver</h3>
<ul>
<li>