Hi,<br><br>so do you think what may cause this situation happened?<br>( the output just stopped after "<span class="e" id="q_114f60f25d7260ce_3"><strong>Backed PXA serial</strong></span>" as i mentioned in last letter )
<br><br>the system crash ? or the linux kernel just output messages by different way (ex: not through RS232 or it use different UART setting) ?<br><br>thanks for your suggestions.<br><br><br><div><span class="gmail_quote">
2007/9/12, Jorge Torres <<a href="mailto:jorge.torres.maldonado@gmail.com">jorge.torres.maldonado@gmail.com</a>>:</span><blockquote class="gmail_quote" style="margin-top: 0; margin-right: 0; margin-bottom: 0; margin-left: 0; margin-left: 0.80ex; border-left-color: #cccccc; border-left-width: 1px; border-left-style: solid; padding-left: 1ex">
<div>Hi Kashin,</div><div> </div><div>Printk is used for outputs inside the Linux kernel in an interrupt context and process context, meaning that it will allways happen, which is not the case of printf.</div><div> </div>
<div>Cheers,</div><div> </div><div>Jorge<br><br> </div><div><div><span class="e" id="q_114f60f25d7260ce_1"><span class="gmail_quote">On 9/11/07, <b class="gmail_sendername">kashin Lin</b> <<a href="mailto:kashin08@gmail.com" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">
kashin08@gmail.com</a>> wrote:</span> </span></div><blockquote class="gmail_quote" style="padding-left: 1ex; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0.80ex; border-left-color: #cccccc; border-left-width: 1px; border-left-style: solid">
<div><span class="e" id="q_114f60f25d7260ce_3">i build okl4 for my pxa270 develop board and upload the image on it.<br>but the ouput messages just stop appearing as following: <br><br><strong>OKL4 - (provider: Open Kernel Labs) built on Sep 4 2007 03:31:16 using gcc version
3.4.4.<br>init_spaceids:125: Init spaceids 256 spaces<br><br>*****************************************<br>* Iguana system, Copyright 1996-2006 * <br>* ERTOS - National ICT Australia *<br>*****************************************
<br><br>vbase is 0x1302000, vend is 0xcfffffff<br>addr is 0x1302000, vbase is 0x1302000<br>PXA25X OS Timer driver starting...<br>PXA25X wrap handler installed <br>Using FFUART.<br>Backed PXA serial</strong><br><br>the stop timming seems to be at the beginning of Wombat which
<br>use "printk" as it output function. <br>( the function for ouputing the message i got (above) seems to be "printf" ). <br><br>so i think there are two posible causes:<br>1. "prink" use the different way to ouput (comparing to "printf" )or
<br> Wombat re-configure UART, so the full system is working but<br> i can't see the ouput messages. <br> ( the required setting to connect my develop board by RS232 is 9600 8 n 1)<br><br>2. the system is really stopping due to some reasons...
<br><br>so how can i recognize which one is the actual cause of this situation? <br>will option 1 occur?<br>(i'm not sure the difference between printk & printf's implementation )<br><br></span></div>_______________________________________________
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