https://devzone.nordicsemi.com/f/nordic-q-a/67876/no-uart-txrdy-interruptHi all, I&#39;m trying to setup an interrupt-driven UART. UART is able to transmit data, but I don&#39;t get the TXRDY interrupt. Below is my minimal initialisation that outputs one character. The TXRDY is interrupt is enabled, so after transmitting a byteen-USTelligent Community 13Mon, 02 Nov 2020 12:38:14 GMThttps://devzone.nordicsemi.com/thread/278057?ContentTypeID=1Mon, 02 Nov 2020 12:38:14 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b907049f-7693-40a6-9b67-c46c9161b5adKenneth<p>For development debugging I suggest to use one of the supported IDE&#39;s:<br /><a href="https://infocenter.nordicsemi.com/topic/ug_getting_started/UG/common/nordic_tools.html">https://infocenter.nordicsemi.com/topic/ug_getting_started/UG/common/nordic_tools.html</a></p> <p>For instance SES provide a free license for development commercial products using nRF devices:<br /><a href="https://license.segger.com/Nordic.cgi">https://license.segger.com/Nordic.cgi</a></p> <p>Tutorial here:<br /><a href="https://www.youtube.com/watch?v=YZouRE_Ol8g&amp;list=PLx_tBuQ_KSqGHmzdEL2GWEOeix-S5rgTV&amp;index=1">https://www.youtube.com/watch?v=YZouRE_Ol8g&amp;list=PLx_tBuQ_KSqGHmzdEL2GWEOeix-S5rgTV&amp;index=1</a></p> <p>The homepage have been updated since it was made, so the first few minutes will look different on today&#39;s nordic homepage.</p> <p>I suggest to look at the nrfx_uart.c if you want to build your own driver, for instance nrfx_uart_init() in specific should show what you are interested in.</p> <p></p> <p></p><div style="clear:both;"></div>