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<?xml-stylesheet type="text/xsl" href="https://devzone.nordicsemi.com/cfs-file/__key/system/syndication/rss.xsl" media="screen"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Radio test with nrf21540</title><link>https://devzone.nordicsemi.com/f/nordic-q-a/68539/radio-test-with-nrf21540</link><description>Hi, 
 
 I using the nrf52840 EVB(pca10056), there&amp;#39;s no nrf21540 connect, but in our design we will using the nrf52840 + nrf21540. 
 And I build the radio test example with pca10112(nrf52840 + nrf21540). 
 Then I send the start_tx_modulated_carrier command</description><dc:language>en-US</dc:language><generator>Telligent Community 13</generator><lastBuildDate>Fri, 20 Nov 2020 13:14:15 GMT</lastBuildDate><atom:link rel="self" type="application/rss+xml" href="https://devzone.nordicsemi.com/f/nordic-q-a/68539/radio-test-with-nrf21540" /><item><title>RE: Radio test with nrf21540</title><link>https://devzone.nordicsemi.com/thread/281109?ContentTypeID=1</link><pubDate>Fri, 20 Nov 2020 13:14:15 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:c6949778-327c-418a-94be-9b5452a19cb6</guid><dc:creator>H&amp;#229;kon Alseth</dc:creator><description>&lt;p&gt;Hi,&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
[quote user=""]I using the nrf52840 EVB(pca10056), there&amp;#39;s no nrf21540 connect, but in our design we will using the&amp;nbsp;&lt;span&gt;nrf52840&amp;nbsp;+ nrf21540.&lt;/span&gt;[/quote]
&lt;p&gt;&amp;nbsp;Without having the nRF21540 attached, the firmware will be stuck when trying to communicate with it.&lt;/p&gt;
&lt;p&gt;Here&amp;#39;s the stack trace when running this project on the nRF52840-DK without a nRF21540 attached:&lt;/p&gt;
&lt;p&gt;&lt;pre class="ui-code" data-mode="text"&gt;(gdb) bt
#0  is_device_on () at ../../../../../../components/drivers_ext/nrf21540/nrf21540.c:555
#1  nrf21540_power_down (user_trigger_event=user_trigger_event@entry=0x0, mode=mode@entry=NRF21540_EXEC_MODE_BLOCKING) at ../../../../../../components/drivers_ext/nrf21540/nrf21540.c:555
#2  0x00009362 in radio_disable () at ../../../radio_test.c:296
#3  RADIO_IRQHandler () at ../../../radio_test.c:677
#4  &amp;lt;signal handler called&amp;gt;
#5  nrf_queue_generic_pop (p_queue=&amp;lt;optimized out&amp;gt;, p_element=0x2003feac, just_peek=&amp;lt;optimized out&amp;gt;) at ../../../../../../components/libraries/queue/nrf_queue.c:281
#6  0x00000000 in ?? ()
&lt;/pre&gt;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;Kind regards,&lt;/p&gt;
&lt;p&gt;Håkon&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item></channel></rss>