nRF52840 software UART didn't go well

[FelixSung]

HI, I am trying to develop a project with multiple UART facilities, and I have put the code from the following link in my project.

 nRF52 Software Serial library similar to Arduino software serial 

However, the software UART didn't work well when I tried to put some strings on putty, which showed garbled messages 

settings were as followed:

baud rate: 9600 

development broad: nRF52840

SDK: 17.1.0

  

I don't know how to deal with the problem; are there any suggestions from your side?

Thank you for your help, best regards

[Susheel Nuguru]

It looks like the baud rate the peripheral is transmitting is not matching the baudrate your terminal is listening. I have seen this garbage output more than I should and everytime it turns out to be the baudrate issue. Check your baudrate set in UART peripheral and also check the baudrate with which your sertial terminal is listening to the uart communication.

[FelixSung]

I set both of the baud rate to 9600, but the problem still occurred.

[Susheel Nuguru]

What data are you expecting on the terminal? Are you expecting to receive ascii characters or HEX data? If you receive hex data, then the valid output will still look like garbage on the serial emulator which converts your hex data to ascii.

[hmolesworth]

You also use a spare PWM for an accurate high-speed uart, have a look at this pwm-sequence post for working code I wrote

[FelixSung]

I just copy and paste the code from here

nRF52 Software Serial library similar to Arduino software serial 

and I expected to see ascii char from a to z