Hi Oleg, This audio tones uses same MML used by Microsoft in QBasic in the 80's
More info: https://acassis.wordpress.com/2016/08/16/playing-gorilla-bas-tune-on-nuttx/ This driver is a port of the audio tone created by PX4 project (I think there it was a C++ application). There are many ringtone formats, maybe an improvement to this driver is replacing the MML format with Ringing Tone Text Transfer Language (RTTTL). If you want to do that, please let me know and I'll help you. BR, Alan On 5/26/23, Oleg <ev.m...@gmail.com> wrote: > Hi all, > > While playing with generating audio tones (thanks for the manual > <https://www.youtube.com/watch?v=3U6OZaGnYcc>, Alan!), I wonder what I need > to write to /dev/tone to get constant signal, 100% PWM on the audio pin, > that is beep of maximum volume? > > --- > With best regards, Oleg. >
