GPIO LED blinker using SYSFS on the Rock64

GPIO LED blinker using SYSFS on the Rock64 - Printable Version

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+--- Thread: GPIO LED blinker using SYSFS on the Rock64 (/showthread.php?tid=4695)

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RE: GPIO LED blinker using SYSFS on the Rock64 - tllim - 07-12-2017

(07-12-2017, 06:25 PM)MarkHaysHarris777 Wrote:
(07-12-2017, 06:10 PM)tllim Wrote: Hi Marcus,

Lets create ROCK64 GPIO tutorial guide in PDF format and post at wiki site.

Yes; I'm actually working on that ! ... I'll let you know when its ready. It will also include the Python and C|C++ methods as well.

Thanks :-)

RE: GPIO LED blinker using SYSFS on the Rock64 - MarkHaysHarris777 - 08-23-2017

I updated my chart; while pin GPIO2_A3 does NOT work as output (it should) the pin DOES work as input !

... this was a surprise !

RE: GPIO LED blinker using SYSFS on the Rock64 - fra87 - 12-28-2017

Hi
First of all thank you for your work. Very helpful!
I'd like to share a modified version of the function to calculate the pin number, with a bit of validation to be sure that the string is ok (I hope it is ok). The function returns -1 if there was any problem with the string

Code:
def GPIO_name2gpio(value):

    value = value.upper()

    if (value[0:4] != 'GPIO') or (value[5] != '_'):

        return -1

    try:

        bank_num = int(value[4:5], 10)

        pad_nam = GPIO_pads[value[6:7]]

        pad_num = int(value[7:], 10)

        if (bank_num < 0) or (bank_num > 3) or (pad_num < 0) or (pad_num > 7):

            return -1;

        return (bank_num * 32) + (pad_nam * 8) + pad_num

    except (ValueError,KeyError):

        return -1

RE: GPIO LED blinker using SYSFS on the Rock64 - dontpostalot - 01-16-2018

I noticed the pin numbers now have an additional offset of 1000 in the latest images (kernel 4.4.103).

RE: GPIO LED blinker using SYSFS on the Rock64 - Leapo - 03-25-2018

Went ahead and wrote a Rock64 GPIO library for Bash: https://github.com/Leapo/Rock64-BashGPIO

Working on porting/re-implementing RPi.GPIO for Python now

RE: GPIO LED blinker using SYSFS on the Rock64 - xalius - 03-26-2018

(03-25-2018, 06:04 PM)Leapo Wrote: Went ahead and wrote a Rock64 GPIO library for Bash: https://github.com/Leapo/Rock64-Utilities

Working on porting/re-implementing RPi.GPIO for Python now

Nice work, can you maybe start a new thread for your RPi.GPIO effort, there are probably some people that would like to contribute...

RE: GPIO LED blinker using SYSFS on the Rock64 - Leapo - 03-26-2018

(03-26-2018, 02:56 AM)xalius Wrote: Nice work, can you maybe start a new thread for your RPi.GPIO effort, there are probably some people that would like to contribute...

I'll fire up a separate thread as soon as I get the first version of the Python module uploaded to github. Shouldn't be too much longer.

I got basic functionality hammered-out and working last night. Check it out, R64.GPIO is already running RPi.GPIO compatible test code:

[Image: Xsa8Izu.png]

RE: GPIO LED blinker using SYSFS on the Rock64 - ulysse132 - 07-03-2018

Hello,

I have issue when trying the code MarkHaysHarris gave :

Code:
ulysse132@rock64:~$ sudo -i

[sudo] password for ulysse132:

root@rock64:~# echo 101 > /sys/class/gpio/export

-bash: echo: write error: Invalid argument

root@rock64:~#

Could you give me a hand to make this work ? I have the same result with echo 60. I didn't try other values because I don't want to make mistakes.

I use armbian 5.42 (stretch).

Thanks for your help !

RE: GPIO LED blinker using SYSFS on the Rock64 - pfeerick - 07-03-2018

(07-03-2018, 11:30 AM)ulysse132 Wrote: Hello,

I have issue when trying the code MarkHaysHarris gave :

Code:
ulysse132@rock64:~$ sudo -i [sudo] password for ulysse132: root@rock64:~# echo 101 > /sys/class/gpio/export -bash: echo: write error: Invalid argument root@rock64:~#

Could you give me a hand to make this work ? I have the same result with echo 60. I didn't try other values because I don't want to make mistakes.

I use armbian 5.42 (stretch).

Thanks for your help !

Export numbers have changed due to kernel updates and the like. I'll double check what the offset is now and let you know.

RE: GPIO LED blinker using SYSFS on the Rock64 - gaggleoxfoggy - 08-03-2018

I'd also like to know more about making this work on Armbian 5.42 stretch. My /sys/class/gpio only lists 5 items, gpiochip1000, 1032, 1064, 1096, 1510. Is this now accessing them as a group? I'm specifically wanting to use them as triggers so that a button press will trigger events in my python app.