How to use GPIO analog a uart?

[shark]

I'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？

[Nguyen Hoan Hoang]

try this https://github.com/IOsonata/IOsonata/blob/master/ARM/include/idelay.h

[shark]

I mean is GPIO analog a uart。if use “nop” delay，BLE function will be influnences，BLE will be disability。How to use timer analog uart in freeRTOS？

[Nguyen Hoan Hoang]

usec delay is too short to affect anything.  By the time you setup the timer for your delay, you already used up 100+ usec.  Timer delay is only useful for long delays in range of msec+.

[ovrebekk]

Hi 

If I understand you correctly you want to implement a second UART in software?

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?

Best regards
Torbjørn