https://devzone.nordicsemi.com/f/nordic-q-a/70565/how-to-use-gpio-analog-a-uartI&#39;m use freeRTOS by the nrf52832.But it only 1 channel uart,I need to two channels uart。if analog uart by GPIO,need to us delay.How to generate us delay？en-USTelligent Community 13Mon, 18 Jan 2021 15:11:50 GMThttps://devzone.nordicsemi.com/thread/289831?ContentTypeID=1Mon, 18 Jan 2021 15:11:50 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4bbdb081-40c0-4a12-acf8-b24477f85114ovrebekk<p>Hi&nbsp;</p> <p>If I understand you correctly you want to implement a second UART in software?</p> <p>What kind of baudrate do you need for the second UART, and do you need both TX and RX or only one of the two?</p> <p>Best regards<br />Torbjørn</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/289608?ContentTypeID=1Mon, 18 Jan 2021 04:07:15 GMT137ad170-7792-4731-bb38-c0d22fbe4515:895df78f-97d2-4fa9-acc3-582494a630a7Nguyen Hoan Hoang<p>usec delay is too short to affect anything. &nbsp;By the time you setup the timer for your delay, you already used up 100+ usec. &nbsp;Timer delay is only useful for long delays in range of msec+.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/289596?ContentTypeID=1Mon, 18 Jan 2021 00:27:56 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0b8f50fa-38d9-4a5c-a3aa-3b1652341940shark<p>I mean is GPIO analog a uart。if use &ldquo;nop&rdquo; delay，BLE function will be influnences，BLE will be disability。How to use timer analog uart in freeRTOS？</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/289575?ContentTypeID=1Sun, 17 Jan 2021 15:20:43 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c1e7fb6a-34d5-41ef-9b01-eda042fcb17aNguyen Hoan Hoang<p>try this&nbsp;<a href="https://github.com/IOsonata/IOsonata/blob/master/ARM/include/idelay.h">https://github.com/IOsonata/IOsonata/blob/master/ARM/include/idelay.h</a></p><div style="clear:both;"></div>