https://devzone.nordicsemi.com/f/nordic-q-a/86030/twim-can-t-exit-when-sda-is-lowDear , When i use the demo of &quot;.\SDK\nRF5_SDK_17.0.2_d674dde\examples\peripheral\twi_scanner\pca10040\blank\arm5_no_packs&quot;, Some exception occured . The sdk enters dead lock. The function of &quot;twim_xfer&quot; can&#39;t exit the loop of &quot;transmission_finisheden-USTelligent Community 13Tue, 22 Mar 2022 09:18:09 GMThttps://devzone.nordicsemi.com/thread/359310?ContentTypeID=1Tue, 22 Mar 2022 09:18:09 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4def5c49-f6a1-484f-b3bf-3ea3be0b07afJared<p>From which of them does it never returns? Can you use the debugger and see how far the program reaches in the function before it stops?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/359249?ContentTypeID=1Tue, 22 Mar 2022 01:31:41 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1a17f078-daab-413f-aa01-b8989a4af213yellan<p>Hi Jared,</p> <p>It enters infinitely loop,no return value.</p> <p></p> <p>best regards</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/359085?ContentTypeID=1Mon, 21 Mar 2022 11:30:19 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a99328c6-ae62-4de7-83ae-29d87f472318Jared<p>Hi,</p> <p>What value is&nbsp;returned by&nbsp;<span>nrf_drv_twi_tx() and&nbsp;nrf_drv_twi_rx()</span></p> <p><span>regards</span></p> <p><span>Jared&nbsp;</span></p><div style="clear:both;"></div>