UART debugging

Started by Akshaykulkarniak 3 months ago2 replieslatest reply 3 months ago28 views

Hi there , I was debugging UART in a LTE module running on openlinux I could get the data signals when I probe between TX <-> RX ( with ground connected)  ( The frame format was correct ) but when i probe it by connecting it to only TX ( with ground connected ) I don't get the data signals on the oscilloscope . Please let me know the actual behavior of the UART ? Is this behavior correct or wrong ?

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Reply by tagconnectFebruary 19, 2019

Try looking on RX? 

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Reply by AkshaykulkarniakFebruary 20, 2019

Hi there , I don't get the data signal on oscilloscope if I connect the probe only to TX or RX . but if I connect TX & RX ( loopback ) and probe in-between them I get the data signals and are perfect.