Hi, If you need someone that knows the the specifics of the BBB, I would recommend the BBB user group here:
https://groups.google.com/forum/#!categories/beagleboard/beaglebone-black They could give better advice on your schematic. Jeff On Thursday, August 9, 2018 at 12:50:40 AM UTC-7, Lang Gu wrote: > > Hi Jeff， > > I read the pinmux.ods file ,it's very useful for me, but i find input GPIO > pin it's not enough. > If I disable EMMC and use that pin ? > I have drawn 2 versions breakout board schematic for BBB: > (1)outputs use 74ls244, inputs use OPTO, (22 outputs 22 inputs) > (2)outputs use 6N137&pc817(tlp521) inputs use OPTO ( 14 high-speed > outputs & 8 normal outputs 22 inputs) > > I want to sent to you.. help me check it。When it's practical，I will open > source in the future。 > Can I send the schematic to your email (*sup...@xylotex.com > <javascript:>)* ? > > 在 2018年8月7日星期二 UTC+8下午11:57:57，Jeff Pollard写道： >> >> Hi, >> >> There is a table here: >> >> >> https://github.com/cdsteinkuehler/beaglebone-black-pinmux/blob/hal_pru_generic/pinmux.ods >> >> that shows how various pins can be assigned. >> >> The pin's drive capability seems to vary from pin to pin on the BBB, >> so you should probably check that to make sure it can drive your led in the >> opto. Or just use a logic buffer to drive the opto. >> >> Jeff >> >> >> On Tuesday, August 7, 2018 at 1:45:43 AM UTC-7, Lang Gu wrote: >>> >>> >>> <https://lh3.googleusercontent.com/-vL3glDwarSs/W2lcL-j567I/AAAAAAAAACo/i7AaeUXFcyQkaQsnMzG4csJXAJv---KEQCLcBGAs/s1600/QQ%25E5%259B%25BE%25E7%2589%258720180807164436.png> >>> Hello machinekit team and everyone >>> >>> I come from China,my english is very poor.So try to say as simple as >>> possible. >>> In China It's no cnc cape available.So i try to make a 5 axis cnc cape >>> for BBB. >>> >>> Someone can tell me if this pin assignment is possible, or if there are >>> any problems? >>> >>> P8 SIGNAL >>> 1 GND >>> 2 GND >>> 3 A_ >>> 4 B_ >>> 5 X_1 >>> 6 X_10 >>> 7 X_100 >>> 8 X-AXIS >>> 9 Y-AXIS >>> 10 Z-AXIS >>> 11 4-AXIS >>> 12 5-AXIS >>> 13 PWM-0 >>> 14 X-MIN >>> 15 X-MAX >>> 16 Y-MIN >>> 17 Y-MAX >>> 18 Z-MIN >>> 19 Z-MAX >>> 20 A-MIN >>> 21 A-HOME >>> 22 B-HOME >>> 23 E-STOP >>> 24 SPINDLE-SPEED >>> 25 Z-PROBE >>> 26 TOOL-SENSOR >>> 27 HDMI >>> 28 HDMI >>> 29 HDMI >>> 30 HDMI >>> 31 HDMI >>> 32 HDMI >>> 33 HDMI >>> 34 HDMI >>> 35 HDMI >>> 36 HDMI >>> 37 HDMI >>> 38 HDMI >>> 39 HDMI >>> 40 HDMI >>> 41 HDMI >>> 42 HDMI >>> 43 HDMI >>> 44 HDMI >>> 45 HDMI >>> 46 HDMI >>> >>> >>> >>> P9 SIGNAL >>> 1 GND >>> 2 GND >>> 3 3.3V >>> 4 3.3V >>> 5 5V >>> 6 5V >>> 7 SYS-5V >>> 8 SYS-5V >>> 9 PWR_BUT >>> 10 SYS_RESETn >>> 11 X-STEP >>> 12 X-DIR >>> 13 Y-STEP >>> 14 PWM-2 >>> 15 Y-DIR >>> 16 Z-STEP >>> 17 Z-DIR >>> 18 A-STEP >>> 19 I2C2_SCL >>> 20 I2C2_SDA >>> 21 A-DIR >>> 22 B-STEP >>> 23 B-DIR >>> 24 6-STEP >>> 25 6-DIR >>> 26 SPINDLE-ON >>> 27 COOLANT >>> 28 OUT3 >>> 29 OUT4 >>> 30 OUT5 >>> 31 OUT6 >>> 32 >>> 33 >>> 34 >>> 35 >>> 36 >>> 37 >>> 38 >>> 39 >>> 40 >>> 41 OUT7 >>> 42 OUT8 >>> 43 GND >>> 44 GND >>> 45 GND >>> 46 GND >>> INPUT & OUTPUT SCH >>> >>> >>> -- website: http://www.machinekit.io blog: http://blog.machinekit.io github: https://github.com/machinekit --- You received this message because you are subscribed to the Google Groups "Machinekit" group. To unsubscribe from this group and stop receiving emails from it, send an email to machinekit+unsubscr...@googlegroups.com. Visit this group at https://groups.google.com/group/machinekit. For more options, visit https://groups.google.com/d/optout.
