Check to see if the parameter "pluto.<whatever>.pwm.is-pdm" is set. If so, try clearing that bit. That sets PDM or "Interleaved" PWM mode, which operates similarly to a step generator - it outputs as high a frequency as possible, to make it easier to average / filter (so you don't need huge caps). Quite useful when you're trying to make a DAC, but not so useful if you actually want fixed-period pulse width modulation.
Of course that may not be the problem either :) - Steve Kirk Wallace wrote: >I received a Pluto today and started playing with it. Thanks to some >help from the IRC (Thank you Skunkworks) I got the driver to load using >LPT1 (378). Although, it loads without the apparent fix (epp_wide=0) now >too. The driver and EMC loads with my PCI parport card, but it it >doesn't respond to AXIS commands, so there is more to troubleshoot. > >I set up the Pluto to drive my Pico PWM amp without feedback, and it >seems to work fine but the large inductors got smelly, Do Not Touch, >hot. I suspect the Pluto PWM frequency (19.5kHz ?) might be the problem >but I don't see any way to change it. > >Briefly looking at the Altera datasheet it looks like the output pins >are good for 25mA? > >I'd appreciate any comments on using Pluto's with PCI cards and how to >keep the Pico amp inductors cool(er). Links to information on working >machines and configurations would be nice too. Thanks. > > > ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
