Alternative dso firmware [Application Software Design Entry]

I would like to use the RS232 ability of the Gabonator alternative firmware (which is truly excellent, although development seems to have ceased some while back :frowning: ). I have searched and searched but not been able to find out how the RS323 signal is actually input into the DS203.



On the page https://github.com/gabonator/DS203, the very first screenshot seems to indicate that the RS232 signal is extracted from the input on channel A and a second signal from channel B. The threshold taken as the ‘zero’ marker “1” and “2” respectively.



This is exactly what I want to do… look at the analog waveform on the oscilloscope, and simultaneously decode it and display the string on the screen!



Other pages allude to cutting open the DS203 and connecting to the ‘genuine’ UART (TX & RX pins on CN7) to achieve RS232 comms.



Anyone done something like what I want to do?

If the input is indeed from one of the analog channels, how do I get to it, and is there an ‘invert’ for signals that appear on the ‘inside’ (logic side) of a level converter (eg:MAX232)?

Is there any information out there on the ‘UART’ function that Gabonator has put in his firmware?



Cheers,

Owen.