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7<title>RTC_SetTimeAsync</title>
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11<h1 align="left">RTC_SetTimeAsync <img src="../image/NTR.gif" align="middle"><img src="../image/TWL.gif" align="middle"></h1>
12<h2>Syntax</h2>
13<dl>
14  <dd>
15<CODE>#include &lt;nitro/rtc.h&gt;</CODE><BR>
16  <PRE><CODE><A href="RTCResult.html">RTCResult</A> RTC_SetTimeAsync(
17            const <A href="RTCTime.html">RTCTime</A>*    time,
18            <A href="RTCCallback.html">RTCCallback</A>       callback,
19            void*             arg );</CODE></PRE>
20  </dd>
21</dl><h2>Arguments</h2>
22<TABLE border="1" width="100%">
23  <TBODY>
24    <TR>
25      <TD width="300"><CODE>time</CODE></TD>
26      <TD width="700">Pointer to the buffer storing time data.</TD>
27    </TR>
28    <TR>
29      <TD><CODE>callback</CODE></TD>
30      <TD>Pointer to the callback function. This callback is called from within the interrupt handler.</TD>
31    </TR>
32    <TR>
33      <TD><CODE>arg</CODE></TD>
34      <TD>Argument to pass to the callback function.</TD>
35    </TR>
36  </TBODY>
37</TABLE>
38<h2>Return Values</h2>
39<P>If the request succeeds, it returns 0. If the request fails, it returns a numeric value other than 0.</P>
40<H2>Description</H2>
41<P>Asynchronously writes time data to the real-time clock. It sends time data to ARM7 and returns the process result without waiting for a response from the processor. To get the result from the processor, you must use the <code>result</code> argument. If this function fails, no operation is performed and no user callback function is called.</P>
42<h2>Note</h2>
43<P><FONT color=red>Do not define parameter values of nonexistent times. Values are set to the RTC as specified by the <code>time</code> argument asynchronously. Do not use this variable for anything else until a user callback function confirms the completion of this asynchronous operation. Because applications cannot change the date, use this API only for debugging during development.</FONT></P>
44<h2>See Also</h2>
45<P><a href="RTC_SetTime.html"><CODE>RTC_SetTime</CODE></a><br> <a href="RTC_GetTime.html"><CODE>RTC_GetTime</CODE></a><br> <a href="RTC_GetTimeAsync.html"><CODE>RTC_GetTimeAsync</CODE></a><br> <a href="RTCResult.html"><CODE>RTCResult</CODE></a><br> <a href="RTCTime.html"><CODE>RTCTime</CODE></a><br> <a href="RTCCallback.html"><CODE>RTCCallback</CODE></a></P>
46<H2>Revision History</H2>
47<P>
482005/06/27 Added additional text indicating that callbacks are called from interrupt handlers. <br> 2004/07/01 Updated descriptions to standardize the time notation.<BR> 2004/05/18 Initial version.
49</P>
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