https://groups.google.com/forum/#!searchin/beagleboard/peter$20hurley$20bother/beagleboard/GC0rKe6rM0g/lrHWS_e2_poJ
I have not tested this code my self, but Marlon said it worked fine for him, and the code is so very simple I do not see why It would not work . . . code is at the gist link below. Hi Marlon, > > On 07/09/2015 07:30 PM, Peter Hurley wrote:> Using the BOTHER method of > setting a custom baud rate is roughly > > outlined in the stackoverflow link noted by William. > > > > I hacked up a quick test to set this baud rate in an i/o validation > > test jig and confirmed with a scope the signal period of ~173.6 us > > I understand that was probably too much information :) > So I forked the github gist from the stackoverflow answer and cleaned it > up. > > Here's what you need to do to get this working. At the console prompt on > your beaglebone: > > $ # install compiler, include files, basic libraries, etc. > $ sudo apt-get install build-essential > > $ # get source file from github for program that allows you to set any > baud in linux > $ wget > https://gist.githubusercontent.com/peterhurley/fbace59b55d87306a5b8/raw/220cfc2cb1f2bf03ce662fe387362c3cc21b65d7/anybaud.c > > $ # compile program > $ gcc -o anybaud anybaud.c > > $ # run program, but substitute your tty device name > $ ./anybaud /dev/ttyS4 5760 > > > Regards, > Peter Hurley On Tue, Jul 5, 2016 at 1:27 AM, <[email protected]> wrote: > Hi, > > I have a BeagleBone Black (rev. C) that runs Debian distro (3.8.13-bone70 > Linux Kernel version), and I want to communicate via *UART *with some > device that's using *1.5Mbaud* (*1500000 *baud). > > Since the serial communication Linux API (*termios.h*) don't provide such > higher values, I'm using the *stty *utility. > This tool allows me to set some higher baud values like: *1000000*, > *1500000*, *2000000*, *2500000*, etc. > > The problem is that when I set the baud rate on some UART-associated port > at *1500000 *baud (via *stty*), it will actually get ~*1754385 *baud (*568 > *nanoseconds per bit, measured using an scope). > Q1: Why is this happening? > Q2: How can I set the exact *1500000 *baud? (+- *~5%* variation would be > fine). > Thanks. > > -- > 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]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/6f1caa9d-e1b6-4de1-818b-ea327f784452%40googlegroups.com > <https://groups.google.com/d/msgid/beagleboard/6f1caa9d-e1b6-4de1-818b-ea327f784452%40googlegroups.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- 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]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CALHSORoNRjCVuRWdiqk2iMRL6HQFndkiSoni6v3BDQvjCP2ouQ%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
