**** BEGIN LOGGING AT Thu Mar 22 03:00:03 2018 Mar 22 03:00:55 Oh, do i need to get a seperate cape? Mar 22 03:01:03 I don't understand your question Mar 22 03:01:09 it has plenty of gpio Mar 22 03:01:19 if the stepper accepts 3.3v signals, you're fine Mar 22 03:02:27 ha! unfortunately, either is 5vdc or 24vdc Mar 22 03:04:31 then you'll need a level shifter of some sort Mar 22 03:07:09 have a link to a datasheet? Mar 22 03:07:41 how to i post a link? Mar 22 03:07:57 uhh, just paste the link? Mar 22 03:08:50 or the part number, then I'll just google it :P Mar 22 03:08:52 http://www.orientalmotor.com/products/pdfs/opmanuals/HM-60139-6E.pdf Mar 22 03:09:28 pg 23 Mar 22 03:10:13 Similar model, What i have are open loop controller Mar 22 03:11:04 that's a lot of signals Mar 22 03:12:06 ah it's not 5 or 24 vdc, it's 5 to 24 vdc Mar 22 03:12:49 I think? not entirely clear Mar 22 03:13:21 actually, regardless: it expects current source outputs, since it needs to drive an optocoupler Mar 22 03:13:40 so you can definitely not use processor i/o for that directly, even if the voltage were right Mar 22 03:13:59 *maybe* you could abuse the motor outputs of the blue for it Mar 22 03:15:19 ah never mind I see now the "5 to 24" was for other inputs, not for CW/CCW Mar 22 03:16:59 yeah this looks like pretty heavy duty stuff, you'll almost certainly want to use some robust output drivers Mar 22 03:18:04 I having searching any driver for BB Blue, have you come across any? Mar 22 03:18:18 nothing "bb blue" specific about it Mar 22 03:18:58 I don't know any specific part numbers of drivers suitable for this application Mar 22 03:19:13 ok, sound a dead end for me. Mar 22 03:19:19 I suspect a wide variety will do Mar 22 03:20:17 the only way to go is use GPIO? I need only to drive the stepper, feedback will be from Encoder Mar 22 03:20:30 there are plenty of hardware people in here too, so probably if you're patient you can get some advice Mar 22 03:32:46 well like I said earlier you might be able to abuse the motor outputs... they're the only outputs with real drivers that the blue has, and I'm pretty sure they can be controlled like regular gpios Mar 22 03:32:46 they're powered from the battery terminals though Mar 22 03:32:46 so that's a complication Mar 22 03:32:46 and to answer your private message earlier (don't send private messages please): no, you don't want an opto-coupler, in fact the stepper controller already has them **** BEGIN LOGGING AT Thu Mar 22 03:33:06 2018 Mar 22 04:10:49 sorry zmatt, it is not private message, i am unable to join back the same web page Mar 22 04:11:21 what if i use arduino couple with beagle bone black? Mar 22 04:12:06 then you're going to need a level shifter *and* an arduino, instead of just a level shifter Mar 22 04:16:13 https://www.cytron.io/p-ifc-si02?search=stepper%20&description=1 Mar 22 04:17:01 may be I am thinking too much. Mar 22 04:20:09 I don't really understand the problem at this point... you just need a 4-channel (for 2 steppers) level shifter from 3.3v to 5v, able to provide sufficient current to drive the optocouplers of your stepper controller's inputs (I suspect this isn't a major constraint in practice)... all you have to do is pick a component with suitable specs Mar 22 04:21:10 (you could probably even just use four transistors, although that may just be more hassle) Mar 22 04:21:12 Ok. Let me clear my mind and think about it. Thanks Mar 22 04:21:34 3.3v to 5v level shifters are not hard to find Mar 22 04:21:49 I agreed with you. Mar 22 04:22:37 ok, good luck :) Mar 22 04:22:52 Thank you anyway! Mar 22 08:32:24 hello Mar 22 15:53:04 hello. Is it possible to change the signals from the BBB to a LCDCape using DeviceTree? For example: could i swap two data pins? Mar 22 18:55:19 does the beaglebone have another usb port on its pins somewhere? or just the one on the board Mar 22 19:28:23 http://beagleboard.org/support/bone101 no usb Mar 22 22:30:56 hi all Mar 22 22:51:14 anyone interested in checking out why my I2C bus isn't being set to 400 kHz? Mar 23 00:52:18 yassyass: tip: don't ask for people to help you, just ask your concrete question (this part you did right) and provide enough information (this part you didn't). e.g. in this case, explain what you tried to do Mar 23 00:53:00 mattvenn: the am335x has two usb ports. on the beaglebone, one is being used for the usb device port and the other one for the usb host port Mar 23 01:51:48 zmatt: thank you and noted. Mar 23 01:54:20 I2C's 0-2 run at 400kHz,100kHz and 100kHz respectively. I want to change the frequency of the latter two busses to 400kHz as I cannot directly access I2C0. Mar 23 01:56:15 What I have attempted is to modify the am335x-boneblack.dtb device tree file located in /boot/dtbs/4.9.45-ti-r57 and changed the frequency values for I2C-1 and I2C-2 to 400kHz however it does not seem to have taken effect Mar 23 01:59:03 the boot log is copied in here showing that the frequencies were not changed: https://pastebin.com/fgkRkCRv Mar 23 02:29:31 hi Mar 23 02:34:56 wonder if that nick was a prank, or someone who didn't get it **** ENDING LOGGING AT Fri Mar 23 03:00:03 2018