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    <title>LPC Microcontrollers中的主题 why gpio read interrupt status function unavailable ?</title>
    <link>https://community.nxp.com/t5/LPC-Microcontrollers/why-gpio-read-interrupt-status-function-unavailable/m-p/544455#M12894</link>
    <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;STRONG&gt;Content originally posted in LPCWare by clarkzh on Thu Sep 25 06:58:08 MST 2014&lt;/STRONG&gt;&lt;BR /&gt;&lt;SPAN&gt;in latetest expresso version example i see&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;/**&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt; * @briefHandle interrupt from GPIO pin or GPIO pin mapped to PININT&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt; * @returnNothing&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt; */&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;void PININT_IRQ_HANDLER(void)&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;{&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;/* Clear interrupt */&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;Chip_GPIO_ClearInts(LPC_GPIO, tmp, (1 &amp;lt;&amp;lt; GPIO_PININT));&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;}&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;but i think the GPIO INT status might not be triggered by that pin. it should be checked first. like in previes vesion &lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;see&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;void PIOINT0_IRQHandler(void)&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;{&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;&amp;nbsp; uint32_t regVal;&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;&amp;nbsp; gpio0_counter++;&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;&amp;nbsp; regVal = GPIOIntStatus( PORT0, 1 );&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;&amp;nbsp; if ( regVal )&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;&amp;nbsp; {&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;p0_1_counter++;&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;GPIOIntClear( PORT0, 1 );&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;&amp;nbsp; }&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;&amp;nbsp; return;&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;}&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;i can not find similar function in expresso vesion example&amp;nbsp; like :GPIOIntStatus( PORT0, 1 );&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;it is just abundant from this version . why? i need to read some reg to check which pin trigger the interrupt.&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
    <pubDate>Wed, 15 Jun 2016 19:46:56 GMT</pubDate>
    <dc:creator>lpcware</dc:creator>
    <dc:date>2016-06-15T19:46:56Z</dc:date>
    <item>
      <title>why gpio read interrupt status function unavailable ?</title>
      <link>https://community.nxp.com/t5/LPC-Microcontrollers/why-gpio-read-interrupt-status-function-unavailable/m-p/544455#M12894</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;STRONG&gt;Content originally posted in LPCWare by clarkzh on Thu Sep 25 06:58:08 MST 2014&lt;/STRONG&gt;&lt;BR /&gt;&lt;SPAN&gt;in latetest expresso version example i see&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;/**&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt; * @briefHandle interrupt from GPIO pin or GPIO pin mapped to PININT&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt; * @returnNothing&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt; */&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;void PININT_IRQ_HANDLER(void)&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;{&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;/* Clear interrupt */&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;Chip_GPIO_ClearInts(LPC_GPIO, tmp, (1 &amp;lt;&amp;lt; GPIO_PININT));&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;}&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;but i think the GPIO INT status might not be triggered by that pin. it should be checked first. like in previes vesion &lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;see&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;void PIOINT0_IRQHandler(void)&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;{&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;&amp;nbsp; uint32_t regVal;&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;&amp;nbsp; gpio0_counter++;&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;&amp;nbsp; regVal = GPIOIntStatus( PORT0, 1 );&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;&amp;nbsp; if ( regVal )&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;&amp;nbsp; {&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;p0_1_counter++;&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;GPIOIntClear( PORT0, 1 );&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;&amp;nbsp; }&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;&amp;nbsp; return;&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;}&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;i can not find similar function in expresso vesion example&amp;nbsp; like :GPIOIntStatus( PORT0, 1 );&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;it is just abundant from this version . why? i need to read some reg to check which pin trigger the interrupt.&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Wed, 15 Jun 2016 19:46:56 GMT</pubDate>
      <guid>https://community.nxp.com/t5/LPC-Microcontrollers/why-gpio-read-interrupt-status-function-unavailable/m-p/544455#M12894</guid>
      <dc:creator>lpcware</dc:creator>
      <dc:date>2016-06-15T19:46:56Z</dc:date>
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