https://devzone.nordicsemi.com/f/nordic-q-a/82298/zephyr-uarte-uart_tx-reports-busy-after-receiving-tx_doneI have an application where I need to periodically write a few KB of data from my nRF to a host computer. Since TXD.MAXCNT tops out at 255 bytes, I&#39;m trying to set up all the writes to keep going until the buffer has been written out. I followed somethingen-USTelligent Community 13Mon, 31 Jan 2022 08:50:54 GMThttps://devzone.nordicsemi.com/thread/350363?ContentTypeID=1Mon, 31 Jan 2022 08:50:54 GMT137ad170-7792-4731-bb38-c0d22fbe4515:446efb71-1dc2-4f28-bb54-ee6a6d37e8a2Susheel Nuguru<p>I have not heard anything from David.&nbsp;</p> <p>David, if you have found the reason for this issue and a workaround, then please do care to update us with the new info.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/350033?ContentTypeID=1Thu, 27 Jan 2022 15:35:39 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7a4f8403-0ab4-4e25-9d1a-cb6e09904ea1sread<p>I have seen what I think is very similar issue. In my case the UART locks up and spins at wait_tx_ready(). Did you find a resolution?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/341704?ContentTypeID=1Thu, 02 Dec 2021 12:59:23 GMT137ad170-7792-4731-bb38-c0d22fbe4515:cde050d7-ccb6-4790-8a5a-871b07dc183eSusheel Nuguru<p>What are the contexts in which you are sending the TX bytes?</p> <p>Based on your limited info, it sounds like a deadlock situation where the uart driver still thinks that the past transaction is still not complete.OR possibly TX is stopped for some reason? Can you please check if there are any errors in the uart register or if TXSTOPPED event occured?</p> <p>If none of them happened then probably it is best if you can help me replicate the problem at my end so that i can try to debug it.</p><div style="clear:both;"></div>