how to disable HDMI / eMMc pins in BeagleBone Black

[hcasalnc...@gmail.com]

Hello 

In my project I am needing  to use 30  pins of  the P8 expansion header  and 6 pins of  the P9 expansion header as GPIO only, also I will use all analog pins(P9). I do not  need  to use the HDMI neither eMMc pins . I have been reading information about this  and I believe is necessary to configure the BBB to operate in mode 7. 

How can I do it?

Thanks

Hugo

  

[kpran...@gmail.com]

You can follow up this tutorial to disable the pru in your beaglebone black https://youtu.be/PZSxRHO59AI
Or you can see the 3rd video on the site
http://beagleboard.org/pru .

[kpran...@gmail.com]

Follow the video from 57 min from the first link given above

[devm...@gmail.com]

Hello Hugo,

you can disable with editing the file /boot/uEnv.txt

Check your kernel version before ( uname -r )

For v3.8.x kernel:

#Disable HDMI/eMMC

cape_disable=capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN,BB-BONE-EMMC-2G

#Disable HDMI

cape_disable=capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN

#Disable eMMC

cape_disable=capemgr.disable_partno=BB-BONE-EMMC-2G

For v4.1.x kernel:

#HDMI (Audio/Video) disabled:

dtb=am335x-boneblack-emmc-overlay.dtb

#eMMC disabled:

dtb=am335x-boneblack-hdmi-overlay.dtb

#HDMI Audio/eMMC disabled:

dtb=am335x-boneblack-nhdmi-overlay.dtb

#HDMI (Audio/Video)/eMMC disabled:

dtb=am335x-boneblack-overlay.dtb

For v4.4.x, v4.9.x, v4.14.x and higher kernel:

##Disable auto loading of virtual capes (emmc/video/wireless/adc)

#Disable eMMC

disable_uboot_overlay_emmc=1

#Disable HDMI

disable_uboot_overlay_video=1

#Disable Audio

disable_uboot_overlay_audio=1

#Disable Wireless

disable_uboot_overlay_wireless=1

#Disable ADC

disable_uboot_overlay_adc=1

[Hugo Casal]

Thank you very much

Hugo 

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