Re: [beagleboard] User LED forward to GPIO
From: Brandon I Reply-To: Date: Friday, May 9, 2014 at 3:06 PM To: Subject: Re: [beagleboard] User LED forward to GPIO > I use this: https://github.com/nomel/beaglebone/tree/master/led-header > > Makes setting up leds super easy. Just so you know, this will only work for Kernel V3.8 Regards, John > > > On Thursday, May 8, 2014 9:35:31 AM UTC-7, Charles Steinkuehler wrote: >> The way these systems are configured, I don't know if you can do what >> you want without generating a custom device tree. >> >> The leds class has a trigger function and can be tied to various GPIO >> pins, but I believe that conflicts with exporting that same GPIO pin. >> >> If anyone knows of a way to do this without requiring customizing a >> device tree to move GPIO pins from /sys/class/gpio to /sys/class/leds/ >> entries, or if there's a way to have both for the same pin, I'd love to >> hear it! >> >> On 5/8/2014 10:49 AM, Hannes Hörting wrote: >>> > Hello John! >>> > >>> > Thank you! >>> > I`m using Debian and also the universal device tree from >>> > Charles: https://github.com/cdsteinkuehler/beaglebone-universal-io >>> > >>> > Not sure if its there also available? I doesnt find an information about >>> > heartbeat and cpu for user led on the GPIO. >>> > >>> > Thank you! >>> > >>> > >>> > Am Mittwoch, 7. Mai 2014 20:58:10 UTC+2 schrieb john3909: >>>> >> >>>> >> >>>> >> On 5/7/14, 11:32 AM, "Hannes Hörting" > >>>> >> wrote: >>>> >> >>>>> >>> Hello! >>>>> >>> >>>>> >>> Can I forward the User Led to the GPIO? >>>>> >>> I want to build my own Expansion Board and need this LED. >>>>> >>> >>>>> >>> OR is this function already connectet to some GPIO? >>>>> >>> >>>>> >>> Thank you! >>>> >> You can change the GPIO for the User LED by modifying the BBB device >>>> tree. >>>> >> Look at arch/arm/boot/dts/am335x-bone-common.dtsi >>>> >> >>>> >> >>>> >> Regards, >>>> >> John >>>>> >>> >>>>> >>> -- >>>>> >>> 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. >>>> >> >>>> >> >>>> >> >>> > >> >> >> -- >> Charles Steinkuehler >> cha...@steinkuehler.net > > -- > 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. -- 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.
Re: [beagleboard] User LED forward to GPIO
I use this: https://github.com/nomel/beaglebone/tree/master/led-header Makes setting up leds super easy. On Thursday, May 8, 2014 9:35:31 AM UTC-7, Charles Steinkuehler wrote: > > The way these systems are configured, I don't know if you can do what > you want without generating a custom device tree. > > The leds class has a trigger function and can be tied to various GPIO > pins, but I believe that conflicts with exporting that same GPIO pin. > > If anyone knows of a way to do this without requiring customizing a > device tree to move GPIO pins from /sys/class/gpio to /sys/class/leds/ > entries, or if there's a way to have both for the same pin, I'd love to > hear it! > > On 5/8/2014 10:49 AM, Hannes Hörting wrote: > > Hello John! > > > > Thank you! > > I`m using Debian and also the universal device tree from > > Charles: https://github.com/cdsteinkuehler/beaglebone-universal-io > > > > Not sure if its there also available? I doesnt find an information about > > heartbeat and cpu for user led on the GPIO. > > > > Thank you! > > > > > > Am Mittwoch, 7. Mai 2014 20:58:10 UTC+2 schrieb john3909: > >> > >> > >> On 5/7/14, 11:32 AM, "Hannes Hörting" > > >> wrote: > >> > >>> Hello! > >>> > >>> Can I forward the User Led to the GPIO? > >>> I want to build my own Expansion Board and need this LED. > >>> > >>> OR is this function already connectet to some GPIO? > >>> > >>> Thank you! > >> You can change the GPIO for the User LED by modifying the BBB device > tree. > >> Look at arch/arm/boot/dts/am335x-bone-common.dtsi > >> > >> > >> Regards, > >> John > >>> > >>> -- > >>> 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. > >> > >> > >> > > > > > -- > Charles Steinkuehler > cha...@steinkuehler.net > -- 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.
Re: [beagleboard] User LED forward to GPIO
Hi,
on a 3.14 kernel I copied am335x-boneblack.dts and made my own:
am335x-boneblack-res-1.dts
to this I added:
/* --> define custom leds pinmux */
&am33xx_pinmux {
traffic_leds_s0: traffic_leds_s0 {
pinctrl-single,pins = <
0x78 (PIN_OUTPUT_PULLDOWN | MUX_MODE7) /*
.gpio1_28, P9_12 60 $PIN: 30 OUTPUT MODE7 - traffic-1 LED */
0x44 (PIN_OUTPUT_PULLDOWN | MUX_MODE7) /*
.gpio1_17, P9_23 49 $PIN: 17 OUTPUT MODE7 - traffic-2 LED */
0x1A4 (PIN_OUTPUT_PULLDOWN | MUX_MODE7) /*
.gpio3_19, P9_27 115 $PIN: 105 OUTPUT MODE7 - traffic-3 LED */
0x34 (PIN_OUTPUT_PULLDOWN | MUX_MODE7) /*
.gpio1_13, P8_11 45 $PIN: 13 OUTPUT MODE7 - traffic-4 LED */
0x30 (PIN_OUTPUT_PULLDOWN | MUX_MODE7) /*
.gpio1_12, P8_12 44 $PIN: 12 OUTPUT MODE7 - traffic-5 LED */
0x28 (PIN_OUTPUT_PULLDOWN | MUX_MODE7) /*
.gpio0_26, P8_14 26 $PIN: 10 OUTPUT MODE7 - traffic-6 LED */
0x3c (PIN_OUTPUT_PULLDOWN | MUX_MODE7) /*
.gpio1_15, P8_15 47 $PIN 15 OUTPUT MODE7 - traffic-7 LED */
>;
};
};
/* <-- define custom leds pinmux */
and
/* --> define custom leds */
gpio_leds {
pinctrl-names = "default";
pinctrl-0 = <&traffic_leds_s0>;
compatible = "gpio-leds";
led@1 {
label = "trfcl1:red";
gpios = <&gpio1 28 GPIO_ACTIVE_HIGH>;
linux,default-trigger = "heartbeat";
default-state = "on";
};
led@2 {
label = "trfcl1:amber";
gpios = <&gpio1 17 GPIO_ACTIVE_HIGH>;
linux,default-trigger = "heartbeat";
default-state = "on";
};
led@3 {
label = "trfcl1:green";
gpios = <&gpio3 19 GPIO_ACTIVE_HIGH>;
linux,default-trigger = "heartbeat";
default-state = "on";
};
led@4 {
label = "trfcl2:red";
gpios = <&gpio1 13 GPIO_ACTIVE_HIGH>;
linux,default-trigger = "heartbeat";
default-state = "on";
};
led@5 {
label = "trfcl2:amber";
gpios = <&gpio1 12 GPIO_ACTIVE_HIGH>;
linux,default-trigger = "heartbeat";
default-state = "on";
};
led@6 {
label = "trfcl2:green";
gpios = <&gpio0 26 GPIO_ACTIVE_HIGH>;
linux,default-trigger = "heartbeat";
default-state = "on";
};
led@7 {
label = "trfcl3:red";
gpios = <&gpio1 15 GPIO_ACTIVE_HIGH>;
linux,default-trigger = "heartbeat";
default-state = "on";
};
};
/* <-- define custom leds */
Then you need to build this new flat device tree and load it to your board.
Hope this helps,
Robert
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Re: [beagleboard] User LED forward to GPIO
From: faimbs Reply-To: Date: Friday, May 9, 2014 at 10:42 AM To: Subject: Re: [beagleboard] User LED forward to GPIO > Hello John! > > Maybe Charles unterstud what you mean. > > Unfortunately I'm not an expert of DT. So maybe you can explain how I can use > GPIO as usrLED? > > In the am335x-boneblack.dts are GPIO 21 - 24 for usr0 - usr3. But don know if > they are activ and available. > Cannot find these GPIO! I recommend that you always retain the previous responses as I don¹t recall what your original questions was. Anyway, in arch/arm/boot/dts/am335x-bone-common.dtsi, on line 30 you will find the pins used for the LEDs. If you want to move the LEDs to a different GPIO, then this is where you make that change. Regards, John > > Thank you! > > faimbs > -- > 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. -- 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.
Re: [beagleboard] User LED forward to GPIO
Hello John! Maybe Charles unterstud what you mean. Unfortunately I'm not an expert of DT. So maybe you can explain how I can use GPIO as usrLED? In the am335x-boneblack.dts are GPIO 21 - 24 for usr0 - usr3. But don know if they are activ and available. Cannot find these GPIO! Thank you! faimbs -- 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.
Re: [beagleboard] User LED forward to GPIO
On 5/8/14, 9:35 AM, "Charles Steinkuehler"
wrote:
>The way these systems are configured, I don't know if you can do what
>you want without generating a custom device tree.
>
>The leds class has a trigger function and can be tied to various GPIO
>pins, but I believe that conflicts with exporting that same GPIO pin.
>
>If anyone knows of a way to do this without requiring customizing a
>device tree to move GPIO pins from /sys/class/gpio to /sys/class/leds/
>entries, or if there's a way to have both for the same pin, I'd love to
>hear it!
Without the benefit of a DT overlay, I think you are stuck with generating
a customized DT. Rather than modifying the existing DT files, perhaps it
would be better to update am335x-boneblack.dts to include a custom DTS
like this:
‹
/include/ ³am33xs.dtsi²
/include/ ³am335x-bone-common.dtsi²
/include/ ³am335x-custom.dtsi²
&am33xx_pinmux {
etc
‹
Now am335x-custom.dtsi can be used to override any previous DT settings.
It would also be possible to add various cape DT to am335x-custom.dtsi.
Unfortunately DTC cannot detect conflicts and these will only be detected
when the kernel boots.
Regards,
John
>
>On 5/8/2014 10:49 AM, Hannes Hörting wrote:
>> Hello John!
>>
>> Thank you!
>> I`m using Debian and also the universal device tree from
>> Charles: https://github.com/cdsteinkuehler/beaglebone-universal-io
>>
>> Not sure if its there also available? I doesnt find an information
>>about
>> heartbeat and cpu for user led on the GPIO.
>>
>> Thank you!
>>
>>
>> Am Mittwoch, 7. Mai 2014 20:58:10 UTC+2 schrieb john3909:
>>>
>>>
>>> On 5/7/14, 11:32 AM, "Hannes Hörting" >
>>> wrote:
>>>
Hello!
Can I forward the User Led to the GPIO?
I want to build my own Expansion Board and need this LED.
OR is this function already connectet to some GPIO?
Thank you!
>>> You can change the GPIO for the User LED by modifying the BBB device
>>>tree.
>>> Look at arch/arm/boot/dts/am335x-bone-common.dtsi
>>>
>>>
>>> Regards,
>>> John
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>>>
>>>
>>>
>>
>
>
>--
>Charles Steinkuehler
>char...@steinkuehler.net
>
>--
>For more options, visit http://beagleboard.org/discuss
>---
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Re: [beagleboard] User LED forward to GPIO
The way these systems are configured, I don't know if you can do what you want without generating a custom device tree. The leds class has a trigger function and can be tied to various GPIO pins, but I believe that conflicts with exporting that same GPIO pin. If anyone knows of a way to do this without requiring customizing a device tree to move GPIO pins from /sys/class/gpio to /sys/class/leds/ entries, or if there's a way to have both for the same pin, I'd love to hear it! On 5/8/2014 10:49 AM, Hannes Hörting wrote: > Hello John! > > Thank you! > I`m using Debian and also the universal device tree from > Charles: https://github.com/cdsteinkuehler/beaglebone-universal-io > > Not sure if its there also available? I doesnt find an information about > heartbeat and cpu for user led on the GPIO. > > Thank you! > > > Am Mittwoch, 7. Mai 2014 20:58:10 UTC+2 schrieb john3909: >> >> >> On 5/7/14, 11:32 AM, "Hannes Hörting" > >> wrote: >> >>> Hello! >>> >>> Can I forward the User Led to the GPIO? >>> I want to build my own Expansion Board and need this LED. >>> >>> OR is this function already connectet to some GPIO? >>> >>> Thank you! >> You can change the GPIO for the User LED by modifying the BBB device tree. >> Look at arch/arm/boot/dts/am335x-bone-common.dtsi >> >> >> Regards, >> John >>> >>> -- >>> 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. >> >> >> > -- Charles Steinkuehler char...@steinkuehler.net -- 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.
Re: [beagleboard] User LED forward to GPIO
Hello John! Thank you! I`m using Debian and also the universal device tree from Charles: https://github.com/cdsteinkuehler/beaglebone-universal-io Not sure if its there also available? I doesnt find an information about heartbeat and cpu for user led on the GPIO. Thank you! Am Mittwoch, 7. Mai 2014 20:58:10 UTC+2 schrieb john3909: > > > On 5/7/14, 11:32 AM, "Hannes Hörting" > > wrote: > > >Hello! > > > >Can I forward the User Led to the GPIO? > >I want to build my own Expansion Board and need this LED. > > > >OR is this function already connectet to some GPIO? > > > >Thank you! > You can change the GPIO for the User LED by modifying the BBB device tree. > Look at arch/arm/boot/dts/am335x-bone-common.dtsi > > > Regards, > John > > > >-- > >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.
Re: [beagleboard] User LED forward to GPIO
On 5/7/14, 11:32 AM, "Hannes Hörting" wrote: >Hello! > >Can I forward the User Led to the GPIO? >I want to build my own Expansion Board and need this LED. > >OR is this function already connectet to some GPIO? > >Thank you! You can change the GPIO for the User LED by modifying the BBB device tree. Look at arch/arm/boot/dts/am335x-bone-common.dtsi Regards, John > >-- >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. -- 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.
[beagleboard] User LED forward to GPIO
Hello! Can I forward the User Led to the GPIO? I want to build my own Expansion Board and need this LED. OR is this function already connectet to some GPIO? Thank you! -- 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.
