how to use gpio simulator uart on nrf9160 - soft uart

[fatalfeel]

The nrf9160 can use 3 uart

I want to have one more uart

How to use gpio simulator uart, how to do?

[fatalfeel]

source code here

http://fatalfeel.blogspot.com/2013/12/nrf9160-soft-uart-simulator-gpio-to-uart.html

//one line using, must under 4800
Init_SoftUart(0xe, 0xf, 4800); //done~