[beagleboard] Re: gpio configuration
Hi I am new to the BBB but I will try to help you, I am running Debian Version 8.7 so perhaps something has changed... Are you sure you have HDMI disabled as these pins are used by the HDMI? I found the show-pins pearl script very useful in tracking down pin-mux issues. https://github.com/mvduin/bbb-pin-utils Below is a snip of its output. Any pin that is not in mode 7 is not accessible as a GPIO If you run this scrip it will tell you what mode the pin is in and what is claiming it. So my first step would be to determine the pin mode and work form there. Hope this helps Regards Tom P8.45 / hdmi / sysboot 0 40 fast rx down 7 gpio 2.06 << lo P8_45 (pinmux_P8_45_default_pin) P8.46 / hdmi / sysboot 1 41 fast rx down 7 gpio 2.07 << lo P8_46 (pinmux_P8_46_default_pin) P8.43 / hdmi / sysboot 2 42 fast rx down 7 gpio 2.08 << lo P8_43 (pinmux_P8_43_default_pin) P8.44 / hdmi / sysboot 3 43 fast rx down 7 gpio 2.09 << lo P8_44 (pinmux_P8_44_default_pin) P8.41 / hdmi / sysboot 4 44 fast rx down 7 gpio 2.10 << lo P8_41 (pinmux_P8_41_default_pin) P8.42 / hdmi / sysboot 5 45 fast rx 7 gpio 2.11 lo >> P8_42 (pinmux_P8_42_gpio_pin) P8.39 / hdmi / sysboot 6 46 fast rx 7 gpio 2.12 hi >> P8_39 (pinmux_P8_39_gpio_pin) P8.40 / hdmi / sysboot 7 47 fast rx down 7 gpio 2.13 << lo P8_40 (pinmux_P8_40_default_pin) P8.37 / hdmi / sysboot 8 48 fastdown 4 uart 5 txd ocp/P8_37_pinmux (pinmux_P8_37_uart_pin) P8.38 / hdmi / sysboot 9 49 fast rx down 4 uart 5 rxd ocp/P8_38_pinmux (pinmux_P8_38_uart_pin) P8.36 / hdmi / sysboot 10 50 fast rx down 7 gpio 2.16 << lo P8_36 (pinmux_P8_36_default_pin) P8.34 / hdmi / sysboot 11 51 fast rx down 7 gpio 2.17 << lo P8_34 (pinmux_P8_34_default_pin) P8.35 / hdmi / sysboot 12 52 fast rx 7 gpio 0.08 lo >> P8_35 (pinmux_P8_35_gpio_pin) P8.33 / hdmi / sysboot 13 53 fast rx down 7 gpio 0.09 << hi P8_33 (pinmux_P8_33_default_pin) P8.31 / hdmi / sysboot 14 54 fast rx down 7 gpio 0.10 << lo P8_31 (pinmux_P8_31_default_pin) P8.32 / hdmi / sysboot 15 55 fast rx down 7 gpio 0.11 << hi P8_32 (pinmux_P8_32_default_pin) On Tuesday, February 20, 2018 at 7:49:18 AM UTC, madhuri depuru wrote: > > Hello, > > i am working over beagle bone black. i have got a new board for which i > have downloaded a new debian image of version 9.3 from beagleboard.org > > the image is getting uploaded into my beaglebone.but it has a new gpio > directory structure as shown below. > > export gpio12 gpio20 gpio3 gpio45 gpio5 gpio65 gpio7 unexport > gpio112 gpio13 gpio22 gpio30 gpio46 gpio50 gpio66 gpiochip0 > gpio114 gpio14 gpio23 gpio31 gpio47 gpio51 gpio67 gpiochip32 > gpio115 gpio15 gpio26 gpio4 gpio48 gpio60 gpio68 gpiochip64 > gpio116 gpio2 gpio27 gpio44 gpio49 gpio61 gpio69 gpiochip96 > > but my application requires gpio 70 - 80 which are not present in new > debian version. my old beaglebone black is of debian versio 7.9 and my old > gpio directory structure was > > export gpio44 gpio65 gpio70 gpio75 gpio8 gpio88 gpiochip64 > gpio10 gpio45 gpio66 gpio71 gpio76 gpio80 gpio89 gpiochip96 > gpio11 gpio46 gpio67 gpio72 gpio77 gpio81 gpio9 unexport > gpio23 gpio47 gpio68 gpio73 gpio78 gpio86 gpiochip0 > gpio27 gpio61 gpio69 gpio74 gpio79 gpio87 gpiochip32 > > can anyone please tell me how can i get gpio 70-80 > -- 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. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/e3ff3681-3ce2-4918-89b5-ed1754dfefed%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[beagleboard] Re: GPIO configuration on device Tree[Beagle Board]
Same for me i'm trying to remap the default I/O on the beaglebone with my
custom kernel i've just compile :
I need to modify the default configuration of pinmuxing on the BBB. To do
so i'm trying to modify the am335x-boneblack.dts before recompiling the
kernel. But that file is very awkward. I've only found information about
overlay, but i need this by default not with overlay.
This is for example the pinmuxing I use to define TOR I/O with an overlay
DT:
pinctrl_test: pinctrl_test_0_pins {
pinctrl-single,pins = <
0x078 0x07 /* P9_12 OUTPUT | MODE7 | PULLDOWN */
0x048 0x07 /* P9_14 OUTPUT | MODE7 | PULLDOWN */
0x040 0x07 /* P9_15 OUTPUT | MODE7 | PULLDOWN */
0x04c 0x07 /* P9_16 OUTPUT | MODE7 | PULLDOWN */
0x15c 0x07 /* P9_17 OUTPUT | MODE7 | PULLDOWN */
0x158 0x07 /* P9_18 OUTPUT | MODE7 | PULLDOWN */
0x044 0x07 /* P9_23 OUTPUT | MODE7 | PULLDOWN */
0x1ac 0x07 /* P9_25 OUTPUT | MODE7 | PULLDOWN */
0x030 0x27 /* P8_12 INPUT | MODE7 | PULLDOWN */
0x024 0x27 /* P8_13 INPUT | MODE7 | PULLDOWN */
0x028 0x27 /* P8_14 INPUT | MODE7 | PULLDOWN */
0x03c 0x27 /* P8_15 INPUT | MODE7 | PULLDOWN */
0x038 0x27 /* P8_16 INPUT | MODE7 | PULLDOWN */
0x02c 0x27 /* P8_17 INPUT | MODE7 | PULLDOWN */
0x08c 0x27 /* P8_18 INPUT | MODE7 | PULLDOWN */
0x020 0x27 /* P8_19 INPUT | MODE7 | PULLDOWN */
>;
};
What's the correct syntax to edit the main DT and register pin for TOR I/O,
ANA... The aim after that, is to develop driver to be able to read/write at
high speed (using register) on the different input/output.
Thanks.
Le lundi 17 août 2015 09:17:21 UTC+2, Mehmet Özgür Bayhan a écrit :
>
> Hi. I am using Robert C. Nelson's kernel on my Beagle Board Rev-C
>
> I want to use mmc2 ports as GPIO.
>
> There is 8 pins in mmc and the default configuration in device tree is =
>
>
>>
>>
>>
>>
>>
>>
>> *mmc2: mmc@480b4000 { compatible = "ti,omap3-hsmmc"; reg = <0x480b4000
>> 0x200>; interrupts = <86>; ti,hwmods = "mmc2"; dmas = <&sdma 47>, <&sdma
>> 48>; dma-names = "tx", "rx";};*
>
>
> but disbled default in omap3-beagle.dts. So how should i use these ports
> as GPIO(not as mmc2) and pull them HIGH and direction > out during sturtup?
>
> I am a newbie, I've tried many things but still can't solve.
>
> Any help could be great.
>
> Thanks.
>
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