On Friday 08 December 2017 21:15:29 andy pugh wrote: > On 9 December 2017 at 01:22, Gene Heskett <[email protected]> wrote: > > setp hm2_5i25.0.gpio.001.invert-output true in my hal file > > Are you sure that is the right GPIO number for the PWM output? The > dmesg text will tell you which GPIO each function is on. It isn't a > 1:1 mapping to parport pins. from that machines dmesg: 2601807.281485] hm2/hm2_5i25.0: 34 I/O Pins used: [2601807.281490] hm2/hm2_5i25.0: IO Pin 000 (P3-01): IOPort [2601807.281495] hm2/hm2_5i25.0: IO Pin 001 (P3-14): PWMGen #0, pin Out0 (PWM or Up) (Output) [2601807.281499] hm2/hm2_5i25.0: IO Pin 002 (P3-02): StepGen #0, pin Step (Output) [2601807.281503] hm2/hm2_5i25.0: IO Pin 003 (P3-15): IOPort [2601807.281507] hm2/hm2_5i25.0: IO Pin 004 (P3-03): StepGen #0, pin Direction (Output)
The kicker is that pin 14 was actually the relay control on this sainsmart bob, and I removed the relay, and jumpered the trace to the relay coil to one of the now unused relay output terminals, also wiring up ground to the relay center, an jumpered the 5 volts to the last relay contact. That bob needed all the grounds I could give it. The net result is that the actual signal waveform at that output is right side up. So I tried to invert_output on gpio.001, which ack the above, should have done it. Failing that, I am in the midst of trading that input for reverse polarity drive to one of Jon's pwmservo amps. But it got late, and I was getting hungry so I came in to find my lady sound asleep. I've eaten but she hasn't and she needs to so I may wake her before I give it up for the rest of the night. Anyway, thats the story so far. Reverseing that drive polarity needs more wires, and the terminals aren't big enough to take all the wires needed, so I've wasted at least an hour trying to make up a daisy chain that will actually fit the terminals without falling out half n hour later as I double check what I've done. Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
