Questions about GPIO
#8
(02-14-2016, 05:49 PM)limitlesscodes Wrote: Hey Pine64 backers! I am having difficulty figuring out how I would use C to take user input, button presses, and light LEDs with the GPIO, I understand C fairly well but have no experience with interfacing with"GPIO." Here is the best program I could think of although I believe there is a much better way to do this:
Code:
/*
*Simple pulsing of GPIO example
*/
#include <stdio.h>
#include <string.h>

FILE *zero, *one;

int main(int argc, char *argv[])
{

zero = fopen("/sys/class/gpio/gpio206/value", "w");
one = fopen("/sys/class/gpio/gpio206/value", "w");

while(1)
{
fputs("0\n", zero);
fflush(zero);
fputs("1\n", one);
fflush(one);
}
}
Also what determines the pin number? Thanks for your help!

You've got the right general idea.  See http://falsinsoft.blogspot.com/2012/11/a...space.html and
http://linux-sunxi.org/GPIO


Messages In This Thread
GPIO ports - by igna09 - 12-31-2015, 04:31 AM
RE: GPIO ports - by o9guy - 12-31-2015, 10:28 AM
RE: GPIO ports - by limitlesscodes - 02-07-2016, 01:56 PM
RE: GPIO ports - by tllim - 02-07-2016, 08:25 PM
RE: GPIO ports - by limitlesscodes - 02-10-2016, 12:25 AM
RE: GPIO ports - by tllim - 02-10-2016, 06:53 PM
Questions about GPIO - by limitlesscodes - 02-14-2016, 05:49 PM
RE: Questions about GPIO - by patrickhwood - 02-14-2016, 07:12 PM
RE: Questions about GPIO - by limitlesscodes - 02-15-2016, 06:05 PM
RE: Questions about GPIO - by limitlesscodes - 02-16-2016, 03:15 PM
RE: Questions about GPIO - by patrickhwood - 02-16-2016, 11:45 PM
RE: Questions about GPIO - by limitlesscodes - 02-17-2016, 03:51 PM

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