Am 15.07.2013 um 15:27 schrieb Klemen Dovrtel <klemen_dovr...@yahoo.com>:
> Hello everybody, > > I have the linuxcnc beaglebone black up and running. I tested same simple hal > setup with led blinking and it works fine. I am impressed :) > > I set the base-thread to 1000000 ns (1ms) - this is what i found in other BB > hal configurations which were already loaded on the sd card. Is there a > latency test that i can run on the beaglebone board - i am not using GUI, so > i can not test the latency with the axis GUI? Is this 1000000 ns the number i > should use? Please see the xenomai wiki for details; also the linuxcnc wiki has some information on this (look for 'dohell') you can always point the DISPLAY environment variable to some other X server which has access open (see xhost) and run GUI this way if you want to see the linuxcnc latency-test at work > What other hardware is already supported beside gpio. Can i use i2c, adc, > etc. Are there hal modules already written for this? How can i compile my own > hal modules - i assume the compiler is not supplied with the sd card? You can use the existing drivers like adc and others from a user HAL component, as Charles has done for temperature readout into HAL pins - see his configs This should work for other drivers as well AS LONG AS YOU DONT REQUIRE THEM TO BE REALTIME - note any read(2)/write(2) system calls will usually kill RT performance if you require RT from an existing peripheral , you have essentially only the option to disable the driver, map the driver registers into userland, and 'do it yourself' through register manipulation; this is what hal_bb_gpio does. The trick is similar for other drivers; addresses vary according to hardware. An RT-capable HAL SPI driver for the BB would be a welcome contribution; see the raspberry SPI driver by Gemi Orcullo (picnc on code.google.com) for inspiration. > Is there common beagle bone resource page somewhere - I could not find it at > linuxcnc web site? as of now, I'd say Charles' blog and some beaglebone wiki entries are all we have - Michael > > Best Regards > Klemen > ------------------------------------------------------------------------------ > See everything from the browser to the database with AppDynamics > Get end-to-end visibility with application monitoring from AppDynamics > Isolate bottlenecks and diagnose root cause in seconds. > Start your free trial of AppDynamics Pro today! > http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.clktrk > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ See everything from the browser to the database with AppDynamics Get end-to-end visibility with application monitoring from AppDynamics Isolate bottlenecks and diagnose root cause in seconds. Start your free trial of AppDynamics Pro today! http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
