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Diffstat (limited to 'nuttx/Documentation')
| -rw-r--r-- | nuttx/Documentation/NuttxPortingGuide.html | 36 |
1 files changed, 33 insertions, 3 deletions
diff --git a/nuttx/Documentation/NuttxPortingGuide.html b/nuttx/Documentation/NuttxPortingGuide.html index 64bf3568a..008a414a2 100644 --- a/nuttx/Documentation/NuttxPortingGuide.html +++ b/nuttx/Documentation/NuttxPortingGuide.html @@ -12,7 +12,7 @@ <h1><big><font color="#3c34ec"> <i>NuttX RTOS Porting Guide</i> </font></big></h1> - <p>Last Updated: March 23, 2011</p> + <p>Last Updated: April 13, 2011</p> </td> </tr> </table> @@ -129,7 +129,8 @@ <a href="#analogdrivers">6.3.11 Analog (ADC/DAC) Drivers</a><br> <a href="#pwmdrivers">6.3.12 PWM Drivers</a><br> <a href="#candrivers">6.3.13 CAN Drivers</a><br> - <a href="#quadencoder">6.3.14 Quadrature Encoder Drivers</a> + <a href="#quadencoder">6.3.14 Quadrature Encoder Drivers</a><br> + <a href="#wdogdriver">6.3.15 Watchdog Timer Drivers</a> </ul> <a href="#pwrmgmt">6.4 Power Management</a> <ul> @@ -3261,7 +3262,7 @@ extern void up_ledoff(int led); <h3><a name="quadencoder">6.3.14 Quadrature Encoder Drivers</a></h3> <p> - NuttX supports only a low-level, two-part Quadrature Driver driver. + NuttX supports a low-level, two-part Quadrature Encoder driver. </p> <ol> <li> @@ -3288,6 +3289,35 @@ extern void up_ledoff(int led); </li> </ul> +<h3><a name="wdogdriver">6.3.15 Watchdog Timer Drivers</a></h3> +<p> + NuttX supports a low-level, two-part watchdog timer driver. +</p> +<ol> + <li> + An "upper half", generic driver that provides the comman watchdog timer interface to application level code, and + </li> + <li> + A "lower half", platform-specific driver that implements the low-level timer controls to implement the watchdog timer functionality. + </li> +</ol> +<p> + Files supporting the watchdog timer can be found in the following locations: +</p> +<ul> + <li><b>Interface Definition</b>. + The header file for the NuttX watchdog timer driver reside at <code>include/nuttx/watchdog.h</code>. + This header file includes both the application level interface to the watchdog timer driver as well as the interface between the "upper half" and "lower half" drivers. + The watchdog timer driver uses a standard character driver framework. + </li> + <li><b>"Upper Half" Driver</b>. + The generic, "upper half" watchdog timer driver resides at <code>drivers/watchdog.c</code>. + </li> + <li><b>"Lower Half" Drivers</b>. + Platform-specific watchdog timer drivers reside in <code>arch/</code><i><architecture></i><code>/src/</code><i><chip></i> directory for the specific processor <i><architecture></i> and for the specific <i><chip></i> watchdog timer peripheral devices. + </li> +</ul> + <h2><a name="pwrmgmt">6.4 Power Management</a></h2> <h3><a name="pmoverview">6.4.1 Overview</a></h3> |