Hello On the BeagleBone Black I'm using UART4 for my application.
When I check the UART4 TxD output with the Oscilloscope I'm getting confusing results. Maybe I'm sending the data over UART wrongly, hopefully somebody can help me. At the beginning I do: stty -F /dev/ttyO4 raw afterwards I expect the logic to be standard. With 1 HIGH and 0 LOW <https://lh6.googleusercontent.com/-kVVWwvqvDZU/Uo3cXvsKTeI/AAAAAAAAAHI/LIRoQi5X8rE/s1600/digital.jpg> But when I do it on BBB for 1 (HIGH) i get root@beaglebone:~# echo 1 > /dev/ttyO4 <https://lh4.googleusercontent.com/-v5trXmTEYWc/Uo3dyjCIm1I/AAAAAAAAAHc/uXEREeIlp94/s1600/1.PNG> root@beaglebone:~# echo 0 > /dev/ttyO4 <https://lh6.googleusercontent.com/-XVItYlMGpXc/Uo3d39j5QuI/AAAAAAAAAHk/_2WowMoJLfY/s1600/0.PNG> root@beaglebone:~# echo 110 > /dev/ttyO4 <https://lh6.googleusercontent.com/-kFFTV--jfFY/Uo3f6OBo0GI/AAAAAAAAAHw/LUBluujJ5qk/s1600/110.PNG> root@beaglebone:~# echo 010 > /dev/ttyO4 <https://lh5.googleusercontent.com/-zfLETd-m_b0/Uo3gvu3FA3I/AAAAAAAAAH8/tbWsiQc0CSs/s1600/010.PNG> root@beaglebone:~# echo 11111111 > /dev/ttyO4 <https://lh6.googleusercontent.com/-UlcQo23t8NE/Uo3g5MYUzLI/AAAAAAAAAIE/gVRypKgZnLE/s1600/11111111.PNG> Is it possible to have a normal digital logic as the output of UART? If yes, how to do so. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
