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Progress toward clean SDCC compilation

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@18 42af7a65-404d-4744-a932-0658087f49c3
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patacongo 2007-02-21 21:55:16 +00:00
parent 17ecaed27c
commit b5d671776c
1 changed files with 49 additions and 14 deletions
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63
Documentation/NuttxUserGuide.html
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@ -1806,7 +1806,7 @@ initialization time).
<B>Function Prototype:</B>
<PRE>
#include &lt;wdog.h&gt;
STATUS wd_delete (WDOG_ID wdId);
STATUS wd_delete (WDOG_ID wdog);
</PRE>
<P>
@ -1816,7 +1816,7 @@ has been started.
<P>
<B>Input Parameters:</B>
<UL>
<LI><I>wdId</I>. The watchdog ID to delete. This is actually a
<LI><I>wdog</I>. The watchdog ID to delete. This is actually a
pointer to a watchdog structure.
</UL>
@ -1834,7 +1834,7 @@ it.
<B> POSIX Compatibility:</B> This is a NON-POSIX interface.
VxWorks provides the following comparable interface:
<PRE>
STATUS wdDelete (WDOG_ID wdId);
STATUS wdDelete (WDOG_ID wdog);
</PRE>
<P>
@ -1850,8 +1850,8 @@ before de-allocating it (i.e., never returns ERROR).
<B>Function Prototype:</B>
<PRE>
#include &lt;wdog.h&gt;
STATUS wd_start( WDOG_ID wdId, int delay, wdentry_t wdentry,
int parm1, int parm2, int parm3, int parm4 );
STATUS wd_start( WDOG_ID wdog, int delay, wdentry_t wdentry,
intt argc, ....);
</PRE>
<P>
@ -1867,15 +1867,16 @@ was called.
Watchdog timers execute only once.
<P>
To replace either the timeout delay or the function to be executed,
call wd_start again with the same wdId; only the most recent
call wd_start again with the same wdog; only the most recent
wd_start() on a given watchdog ID has any effect.
<P>
<B>Input Parameters:</B>
<UL>
<LI><I>wdId</I>. Watchdog ID
<LI><I>wdog</I>. Watchdog ID
<LI><I>delay</I>. Delay count in clock ticks
<LI><I>wdentry</I>. Function to call on timeout
<LI><I>parm1..4</I>. Parameters to pass to wdentry
<LI><I>argc</I>. The number of uint32 parameters to pass to wdentry.
<LI><I>...</I>. uint32 size parameters to pass to wdentry
</UL>
<P>
@ -1892,14 +1893,15 @@ restrictions.
<B> POSIX Compatibility:</B> This is a NON-POSIX interface.
VxWorks provides the following comparable interface:
<PRE>
STATUS wdStart (WDOG_ID wdId, int delay, FUNCPTR wdentry, int parameter);
STATUS wdStart (WDOG_ID wdog, int delay, FUNCPTR wdentry, int parameter);
</PRE>
<P>
Differences from the VxWorks interface include:
<UL>
<LI>The present implementation supports four parameters passed
to wdentry; VxWorks supports only a single parameter.
<LI>The present implementation supports multiple parameters passed
to wdentry; VxWorks supports only a single parameter. The maximum
number of parameters is determined by
</UL>
<H3>2.6.4 wd_cancel</H3>
@ -1908,7 +1910,7 @@ to wdentry; VxWorks supports only a single parameter.
<B>Function Prototype:</B>
<PRE>
#include &lt;wdog.h&gt;
STATUS wd_cancel (WDOG_ID wdId);
STATUS wd_cancel (WDOG_ID wdog);
</PRE>
<P>
@ -1918,7 +1920,7 @@ level.
<P>
<B>Input Parameters:</B>
<UL>
<LI><I>wdId</I>. ID of the watchdog to cancel.
<LI><I>wdog</I>. ID of the watchdog to cancel.
</UL>
<P>
@ -1933,7 +1935,7 @@ level.
<B> POSIX Compatibility:</B> This is a NON-POSIX interface.
VxWorks provides the following comparable interface:
<PRE>
STATUS wdCancel (WDOG_ID wdId);
STATUS wdCancel (WDOG_ID wdog);
</PRE>
<HR>
@ -4073,6 +4075,39 @@ notify a task when a message is available on a queue.
int sigev_notify;
};
</PRE>
<H3>3.4.9 Watchdog Data Types</H3>
<p>
When a watchdog expires, the callback function with this
type is called:
</p>
<pre>
typedef void (*wdentry_t)(int argc, ...);
</pre>
<p>
Where argc is the number of uint32 type arguments that follow.
</p>
The arguments are passed as uint32 values.
For systems where the sizeof(pointer) &lt; sizeof(uint32), the
following union defines the alignment of the pointer within the
uint32. For example, the SDCC MCS51 general pointer is
24-bits, but uint32 is 32-bits (of course).
</p>
<pre>
union wdparm_u
{
void *pvarg;
uint32 *dwarg;
};
typedef union wdparm_u wdparm_t;
</pre>
<p>
For most 32-bit systems, pointers and uint32 are the same size
For systems where sizeof(pointer) > sizeof(uint32), we will
have to do some redesign.
</p>
<HR>
<H1>4.0 <A NAME="Problems">Known Problems</A></H1>