halfbrain, I forgot to mention, you should tie the eMMC cmd and clock pins low on P8.20 and P8.21, as suggested by the wiki: http://elinux.org/Beagleboard:BeagleBoneBlack#Onboard_eMMC
On Wednesday, September 3, 2014 12:58:09 PM UTC-7, Brandon I wrote: > > 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.
