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    <title>LPCXpresso IDEのトピックLPC1768 ISP systick timer problem</title>
    <link>https://community.nxp.com/t5/LPCXpresso-IDE/LPC1768-ISP-systick-timer-problem/m-p/538943#M6307</link>
    <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;STRONG&gt;Content originally posted in LPCWare by Andre Schoeman on Mon May 20 17:33:23 MST 2013&lt;/STRONG&gt;&lt;BR /&gt;&lt;SPAN&gt;Hi&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt; &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;I'm using a LPC1768 and LPCXpresso,&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;I'm using the Systick timer as a system base time.&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt; &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;My application works when I debug using a Reb Probe + debugger and it still runs after the debugger has been removed.&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt; &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;If I download this same code via the internal ISP or via the RDB1768cmsis_usb_bootloader then the sys tick timer fails to run.&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt; &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;In both cases I can see the application start to run as I have UART3 sending (interrupt driven) debug information to a terminal.&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt; &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;Any suggestions? &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt; &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;Thanks&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;Andre&lt;/SPAN&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
    <pubDate>Thu, 16 Jun 2016 00:25:09 GMT</pubDate>
    <dc:creator>lpcware</dc:creator>
    <dc:date>2016-06-16T00:25:09Z</dc:date>
    <item>
      <title>LPC1768 ISP systick timer problem</title>
      <link>https://community.nxp.com/t5/LPCXpresso-IDE/LPC1768-ISP-systick-timer-problem/m-p/538943#M6307</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;STRONG&gt;Content originally posted in LPCWare by Andre Schoeman on Mon May 20 17:33:23 MST 2013&lt;/STRONG&gt;&lt;BR /&gt;&lt;SPAN&gt;Hi&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt; &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;I'm using a LPC1768 and LPCXpresso,&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;I'm using the Systick timer as a system base time.&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt; &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;My application works when I debug using a Reb Probe + debugger and it still runs after the debugger has been removed.&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt; &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;If I download this same code via the internal ISP or via the RDB1768cmsis_usb_bootloader then the sys tick timer fails to run.&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt; &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;In both cases I can see the application start to run as I have UART3 sending (interrupt driven) debug information to a terminal.&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt; &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;Any suggestions? &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt; &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;Thanks&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;Andre&lt;/SPAN&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Thu, 16 Jun 2016 00:25:09 GMT</pubDate>
      <guid>https://community.nxp.com/t5/LPCXpresso-IDE/LPC1768-ISP-systick-timer-problem/m-p/538943#M6307</guid>
      <dc:creator>lpcware</dc:creator>
      <dc:date>2016-06-16T00:25:09Z</dc:date>
    </item>
    <item>
      <title>Re: LPC1768 ISP systick timer problem</title>
      <link>https://community.nxp.com/t5/LPCXpresso-IDE/LPC1768-ISP-systick-timer-problem/m-p/538944#M6308</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;STRONG&gt;Content originally posted in LPCWare by Andre Schoeman on Mon May 20 19:08:49 MST 2013&lt;/STRONG&gt;&lt;BR /&gt;&lt;SPAN&gt;Hi&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt; &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;I may have solved the problem,&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;I think it was a timer delay variable that should have been volatile.&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;The code now runs under both bootloaders.&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt; &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;Thanks&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;Andre&lt;/SPAN&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Thu, 16 Jun 2016 00:25:10 GMT</pubDate>
      <guid>https://community.nxp.com/t5/LPCXpresso-IDE/LPC1768-ISP-systick-timer-problem/m-p/538944#M6308</guid>
      <dc:creator>lpcware</dc:creator>
      <dc:date>2016-06-16T00:25:10Z</dc:date>
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