Borisbritwa Posted December 19, 2016 Share Posted December 19, 2016 (jessie 3.4.112-sun8i) How to use debug TTL UART(three pins next to the power jack )? Link to comment Share on other sites More sharing options...
martinayotte Posted December 19, 2016 Share Posted December 19, 2016 if you do "cat /proc/cmdline", you will probably see that serial debug is attached as /dev/ttyS0. Link to comment Share on other sites More sharing options...
Borisbritwa Posted December 19, 2016 Author Share Posted December 19, 2016 if you do "cat /proc/cmdline", you will probably see that serial debug is attached as /dev/ttyS0. Yes you are right (as I understand it is configured). Now how can I use it using C language or Python. cat /dev/ttyS0|tee my-data Will it work? Link to comment Share on other sites More sharing options...
martinayotte Posted December 19, 2016 Share Posted December 19, 2016 What do you mean ? Do you wish to send something from your C or Python application to this serial output ? Or you wish to see the debug output from the kernel without using a USB-Serial dongle ? For the first case, simply use normal open()/read()/write()/close() APIs, for Python, you need to install python-serial. For the second case, no need to talk to serial, simply look at dmesg and/or /var/log/syslog. Link to comment Share on other sites More sharing options...
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