> Spi one does not rely on wiring pi. AFAIK wiringpi does not offer spi support > but I could be wrong.
Hi Ivica, yes it does and it has a C api. It is actually very good and easy to implement. Thanks for all info on the external. I'll check it out as soon as I have a bit of time again… best, Jaime > > > Also, how are you getting the multiple pwm streams? > > I partially rely on wiringpi inside disis_gpio for software pwm on all pins > (I say partially because wiringpi can only create a new thread for software > pwm but does not offer ability to close the thread other than exiting the > program, which is not an option for an environment like pd). So, each opened > pin will have a separate high priority thread that gives you a 1000Hz PWM. > disis_gpio also supports hardware pwm on pin 18 and that one has some kind of > a logarithmic curve and as such behaves distinctly different but I simply did > not want to go into anything higher than 1000Hz as that would choke the cpu. > > HTH > > best, > > J > > > > On Mar 20, 2014, at 1:16 PM, Ivica Ico Bukvic <i...@vt.edu> wrote: > > > On 03/20/2014 12:37 PM, David Medine wrote: > FYI > > There is also a RPi GPIO object for Pd by Miller Puckette here: > http://msp.ucsd.edu/syllabi/206.13w/index.htm > > and the same code with a makefile and build for UDOO here: > https://github.com/cmuartfab/Udoo/tree/dem-rev/puredata/gpio > > I did see the note from garthz about the architecture collisions. I will > attend to this. Anyway, make sure to use the gpio.l_arm version -- just > delete the other two to avoid problems. > > Indeed, disis_gpio is loosely based on gpio. It however also offers things > that gpio (AFAIK) doesn't, like multithreaded pusle-width-modulation > (hardware on pin 18 and software on all pins) with an Arduino-like 0-1023 > range. disis_spi is a completely new beast that allows interfacing with > MCP3008 AD converter and provides up to 8 analog input channels that can > provide high-resolution streams with values 0-1023. So, pd-l2ork externals > essentially look to provide an Arduino-like environment. > > _______________________________________________ > Pd-list@iem.at mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list
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