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8<title>RTC_SetDateTimeAsync</title>
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14<h1 align="left">RTC_SetDateTimeAsync <img src="../image/NTR.gif" align="middle"><img src="../image/TWL.gif" align="middle"></h1>
15
16<h2>Syntax</h2>
17
18<dl>
19  <dd>
20<CODE>#include &lt;nitro/rtc.h&gt;</CODE><BR>
21  <PRE><CODE><A href="RTCResult.html">RTCResult</A> RTC_SetDateTimeAsync(
22            const <A href="RTCDate.html">RTCDate</A>*    date,
23            const <A href="RTCTime.html">RTCTime</A>*    time,
24            <A href="RTCCallback.html">RTCCallback</A>       callback,
25            void*             arg );</CODE></PRE>
26  </dd>
27
28</dl><h2>Arguments</h2>
29<TABLE border="1" width="100%">
30  <TBODY>
31    <TR>
32      <TD width="300"><em><strong><font face="Courier New">date</font></strong></em></TD>
33      <TD width="700">Pointer to the buffer storing date data.</TD>
34    </TR>
35    <TR>
36      <TD><em><strong><font face="Courier New">time</font></strong></em></TD>
37      <TD>Pointer to the buffer storing time data.</TD>
38    </TR>
39    <TR>
40      <TD><em><strong><font face="Courier New">callback</font></strong></em></TD>
41      <TD>Pointer to the callback function. This callback is called from within the interrupt handler.</TD>
42    </TR>
43    <TR>
44      <TD><em><strong><font face="Courier New">arg</font></strong></em></TD>
45      <TD>Argument to pass to the callback function.</TD>
46    </TR>
47  </TBODY>
48</TABLE>
49
50<h2>Return Values</h2>
51<P>If the request succeeds, it returns 0. If the request fails, it returns a numeric value other than 0.</P>
52
53<H2>Description</H2>
54<P>This function asynchronously writes date and time data to the real-time clock. It sends date and 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 <em><strong><code>result</code></strong></em> argument. If this function fails, no operation is performed and no user callback function is called.</P>
55
56<h2>Note</h2>
57<P><FONT color=red>Do not define parameter values of nonexistent years, months, or days. However, you may specify a day of the week that does not match the actual calendar. This function requires a PXI interrupt for synchronization. Values are written to the variables specified by the <code><em><strong>date</strong></em></code> and <code><em><strong>time</strong></em></code> arguments asynchronously with respect to the function.<FONT color=red>Because applications cannot change the date, use this API only for debugging during development.</FONT></P>
58
59<h2>See Also</h2>
60<P><code><a href="RTC_SetDateTime.html">RTC_SetDateTime</a>, <a href="RTC_GetDateTime.html">RTC_GetDateTime</a>, <a href="RTC_GetDateTimeAsync.html">RTC_GetDateTimeAsync</a>, <a href="RTCResult.html">RTCResult</a>, <a href="RTCDate.html">RTCDate</a>, <a href="RTCTime.html">RTCTime</a>, <a href="RTCCallback.html">RTCCallback</a></code></P>
61
62<H2>Revision History</H2>
63<P>
642005/06/27 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.<BR>
65</P>
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