halfbrain, If you're using angstrom or debian, you can disable the emmc by adding this to the optargs in uEnv.txt on the usb mass storage partition: capemgr.disable_partno=BB-BONE-EMMC-2G
If you're not using hdmi, you can free up those too: capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN,BB-BONE-EMMC-2G On Saturday, August 23, 2014 1:11:22 AM UTC-7, halfbrain wrote: > > Would be nice if you could explain how to disable eMMC on debian. I ran > out of GPIO's in my project. Tried to use P9_19 and P9_20 (both I2C's) in > the device tree overlay but since i did that the overlay doesn't work > correctly anymore. > > Am Sonntag, 18. Mai 2014 22:19:16 UTC+2 schrieb john3909: >> >> >> From: Dhruv Vyas <dhruv....@gmail.com> >> Reply-To: <beagl...@googlegroups.com> >> Date: Sunday, May 18, 2014 at 2:42 AM >> To: <beagl...@googlegroups.com> >> Subject: [beagleboard] Can "allocated pins" on BBB be used as GPIOs ? >> >> Hello, >> >> I recently started working on my BBB A6A. I went through necessary >> getting started guides and it works like a charm. Now as a part of my >> project, I need to use some of the GPIOs on P8/P9 header. While googling >> how to use them as a GPIO, and how to set pinmux and etc, I went through >> this guide. >> http://derekmolloy.ie/gpios-on-the-beaglebone-black-using-device-tree-overlays/ >> >> and he explained everything very clearly. >> >> Now my question is : is there any way i can use allocated pins as GPIOs >> other than available pins ? If yes, how ? If no, why ? >> >> For example, P9_19 and P9_20 are Allocated to (Group: pinmux_i2c2_pins) >> and hence it can not be used as GPIOs ? >> >> If pins are also connected to circuitry on the board that cannot be >> disabled then you cannot use those pins for GPIO. For example, pins used >> for the eMMC can be used for GPIO as long as eMMC is disabled. Same for LCD >> pins, but then you cannot use LCD or HDMI. I2C2 isn’t connected to other >> circuity on the board so you can use it for GPIO. >> >> Regards, >> John >> >> >> >> Thanks. >> >> >> >> -- >> For more options, visit http://beagleboard.org/discuss >> --- >> You received this message because you are subscribed to the Google Groups >> "BeagleBoard" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to beagleboard...@googlegroups.com. >> For more options, visit https://groups.google.com/d/optout. >> >> -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
