https://devzone.nordicsemi.com/f/nordic-q-a/121317/spi-sent-but-no-signal-receivedspim2、ncs2.6.1 I used SPIM2 to send the string &quot;Hello, SPIM!&quot; and receive data of the same length. However, on the logic analyzer, I can only see the transmitted signals, and there are no received signals。 int zhd_spim_init ( void ) { #en-USTelligent Community 13Tue, 13 May 2025 09:27:03 GMThttps://devzone.nordicsemi.com/thread/535064?ContentTypeID=1Tue, 13 May 2025 09:27:03 GMT137ad170-7792-4731-bb38-c0d22fbe4515:61e0ea83-2fd0-4152-a394-35520f2c7128Kenneth<p>Hi,</p> <p>Afaik that is not possible no. All communication in SPI is bidirectional.</p> <p>Kenneth</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/535061?ContentTypeID=1Tue, 13 May 2025 09:25:56 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3385cac1-1272-4761-bae4-542acbe7ddd5albert<p>Thank you for letting me know all this. How can I configure SPI to receive only after transmission, in half-duplex mode, instead of increasing the receive buffer to 26?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/535021?ContentTypeID=1Tue, 13 May 2025 07:26:22 GMT137ad170-7792-4731-bb38-c0d22fbe4515:69c63e87-07a6-4f09-9ede-f0d8afe9096dKenneth<p>MISO and MOSI are in parallel, so if you need additional 13bytes from slave, then you need to set the rx buffer to 26.</p> <p>Kenneth</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/534992?ContentTypeID=1Tue, 13 May 2025 02:23:49 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c28e69f3-423b-4d8e-824c-5e8def40121falbert<p>All the SPI pins are connected to a logic analyzer: MISO, MOSI, CS, and CLK. The first 13 bytes are sent from the master to the slave. Shouldn&#39;t there be 13 bytes of clock signals generated by the master afterward to receive data from the slave?</p> <p><img style="max-height:240px;max-width:320px;" src="https://devzone.nordicsemi.com/resized-image/__size/640x480/__key/communityserver-discussions-components-files/4/pastedimage1747103023511v1.png" alt=" " /></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/534880?ContentTypeID=1Mon, 12 May 2025 12:17:08 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b00eb1d6-762c-4018-9fbb-0f55c1c25541Kenneth[quote user=""]<div><div><span><img style="max-height:240px;max-width:320px;cursor:zoom-in;" src="https://devzone.nordicsemi.com/resized-image/__size/640x480/__key/communityserver-discussions-components-files/4/7242.pastedimage1746703621307v1.png" alt=" " /></span></div> </div> I think that even if the slave doesn&#39;t respond, the master should still generate 13 bytes worth of clock signals.[/quote] <p>But it&#39;s 13 bytes there, each ascii is 1byte.</p> <p>Kenneth</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/534876?ContentTypeID=1Mon, 12 May 2025 12:13:01 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3ecbd37a-bb6d-41fc-b279-17fc2dade04dKenneth<p>So what is connected to MISO?</p> <p>Kenneth</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/534844?ContentTypeID=1Mon, 12 May 2025 10:45:47 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e8f33ad3-3fc0-4b46-9e8c-5af898a4f40aalbert<p><img style="max-height:240px;max-width:320px;" src="https://devzone.nordicsemi.com/resized-image/__size/640x480/__key/communityserver-discussions-components-files/4/pastedimage1747046738543v1.png" alt=" " /></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/534777?ContentTypeID=1Mon, 12 May 2025 01:52:52 GMT137ad170-7792-4731-bb38-c0d22fbe4515:99212fe9-fd42-4256-ac14-58a84e5a3ca9albert<p>only connected to a logic analyzer.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/534636?ContentTypeID=1Fri, 09 May 2025 11:26:07 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6370e100-834c-4622-82bf-ee09d73dab3dtesc<p>Hi,</p> <p>What is your setup, are you connecting back to the same device as a loopback, or do you connect to an external device (and if so which one?)</p> <p>Regards,<br />Terje</p><div style="clear:both;"></div>