BBB - BeagleBone Black I/O (GPIO) Library for C

RE: BBB - BeagleBone Black I/O (GPIO) Library for C

pieps — Sat, 25 Sep 2021 23:08:58 GMT

This library works fine. Very easy to use.

But if iolib_init() is called once .... the analog inputs are blocked on OS level ..... forever.

watch cat /sys/bus/iio/devices/iio:device0/in_voltage0_raw

Every 2.0s: cat /sys/bus/iio/devices/iio:device0/in_voltage0_raw beaglebone: Sat Sep 25 23:04:24 2021

cat: '/sys/bus/iio/devices/iio:device0/in_voltage0_raw': Resource temporarily unavailable

That happens independent of iolib_free();

Up to the next reboot .....

Did not find a way to solve that.

Peter

RE: BBB - BeagleBone Black I/O (GPIO) Library for C

yusmi — Thu, 09 Apr 2020 04:39:37 GMT

Hii I'm using Beaglebone Green, and when I run the example code I have a problem :

debian@beaglebone:~/iofunc$ make

gcc -c -o test_app.o test_app.c

In file included from test_app.c:4:0:

iolib.h:50:13: warning: inline function ‘is_low’ declared but never defined

inline char is_low(char port, char pin);

^~~~~~

iolib.h:49:13: warning: inline function ‘is_high’ declared but never defined

inline char is_high(char port, char pin);

^~~~~~~

iolib.h:48:13: warning: inline function ‘pin_low’ declared but never defined

inline void pin_low(char port, char pin);

^~~~~~~

iolib.h:47:13: warning: inline function ‘pin_high’ declared but never defined

inline void pin_high(char port, char pin);

^~~~~~~~

gcc test_app.o -L. -liofunc -o test_app

test_app.o: In function `main':

test_app.c:(.text+0x22): undefined reference to `is_high'

test_app.c:(.text+0x34): undefined reference to `is_low'

test_app.c:(.text+0x48): undefined reference to `pin_high'

test_app.c:(.text+0x58): undefined reference to `pin_low'

collect2: error: ld returned 1 exit status

Makefile:29: recipe for target 'test_app' failed

make: *** [test_app] Error 1

debian@beaglebone:~/iofunc$

I really really need this help very much and I've been stuck for many weeks.

Thank you.

RE: BBB - BeagleBone Black I/O (GPIO) Library for C

silver2row — Mon, 30 Dec 2019 01:55:29 GMT

Hello,

gcc first.c -liofunc -o first

first.c: In function ‘main’:

first.c:23:18: error: ‘low’ undeclared (first use in this function)

pin_low(9, low);

^~~

first.c:23:18: note: each undeclared identifier is reported only once for each function it appears in

This is what I received while trying to compile the source from your youtube.com video located here: https://youtu.be/DAFuXr5_kMg .

Seth

P.S. I usually am pretty good about getting .c and .cpp programs to run well. Is there something I am missing that you might know about?

RE: BBB - BeagleBone Black I/O (GPIO) Library for C

siru — Tue, 06 Mar 2018 07:40:21 GMT

thanks shabaz...i will try if any dought i will reply to you..

thank you

by>siranjeevi

RE: BBB - BeagleBone Black I/O (GPIO) Library for C

siru — Mon, 05 Mar 2018 09:34:09 GMT

hi..

i have used latest code at this location..i read for README.me file.https://github.com/VegetableAvenger/BBBIOlib. The BBBiolib file is written for build libBBBio.a with #make command, this one not excuted and how to start from location i do know ...present start from BBBiolib/BBBio_lib$sudo make or make all cmd the result is > make: *** No targets specified and no makefile found. Stop. ,can you help me..i m beginner for using this git..pls help me..

thanking you..

RE: BBB - BeagleBone Black I/O (GPIO) Library for C

siru — Mon, 05 Mar 2018 06:16:00 GMT

I HAVE FOLLOW YOUR ANSWER USING NEW CODE FOR BBIOlib/Demo/Demo_LED/LED.c

gcc -c LED.c -o LED.o>no error

gcc LED.o -liofunc -o LED>

gcc LED.c -liofunc -o LED /usr/bin/ld: error: LED uses VFP register arguments, /usr/lib/gcc/arm-linux-gnueabihf/6/../../../libiofunc.a(iolib.o) does not

/usr/bin/ld: failed to merge target specific data of file /usr/lib/gcc/arm-linux-gnueabihf/6/../../../libiofunc.a(iolib.o)

collect2: error: ld returned 1 exit status

how to solve, can you help how get result or any video is avalible pls send link.

thanking you..

siranjeevi

RE: BBB - BeagleBone Black I/O (GPIO) Library for C

siru — Sat, 03 Mar 2018 05:52:57 GMT

old code for iofunc_v2.zip folder>move file libiofunc.a, iolib.c to /usr/lib/ and move file iolib.h, iolib.c to /usr/lib/

compile test_app.c >gcc test_app.c -liofunc.a -o test_app

the result od error:

/usr/bin/ld: cannot find -liofunc.a

collect2: error: ld returned 1 exit status

RE: BBB - BeagleBone Black I/O (GPIO) Library for C

siru — Sat, 03 Mar 2018 05:39:36 GMT

hi..

i have used BBBIOlib/Demo/Demo_LED/LED.c using debian os and compile code for gcc LED.c lBBBio.a -o LED but same error will generate

like:

/usr/bin/ld: cannot find -lBBBio.a

collect2: error: ld returned 1 exit status

RE: BBB - BeagleBone Black I/O (GPIO) Library for C

siru — Fri, 02 Mar 2018 11:59:03 GMT

hi shabaz..thanks for replying..

i have used your git folder ..i have problem for compile time see this is my error:

/usr/bin/ld: cannot find -liofunc

collect2: error: ld returned 1 exit status

how solve..can you help me..

thankuing you

siranjeevi

RE: BBB - BeagleBone Black I/O (GPIO) Library for C

siru — Fri, 02 Mar 2018 07:44:32 GMT

hi,

how to solve for this >>>>>error: main uses VFP register arguments,............

pls help me

siranjeevi

RE: BBB - BeagleBone Black I/O (GPIO) Library for C

siru — Fri, 02 Mar 2018 06:36:08 GMT

I HAVE USED FOR DEBIAN OS ...

RE: BBB - BeagleBone Black I/O (GPIO) Library for C

siru — Fri, 02 Mar 2018 06:35:05 GMT

hi..

i have used this library(/usr/include/>iolib.h) (/usr/lib/>libiofunc.a) into the beaglebone and type the code for nano and save for test_app.c.then compile gcc test_app.c liofunc -o test_app of this file the result is

/usr/bin/ld: error: main uses VFP register arguments, /usr/lib/gcc/arm-linux-gnueabihf/6/../../../libiofunc.a(iolib.o) does not

/usr/bin/ld: failed to merge target specific data of file /usr/lib/gcc/arm-linux-gnueabihf/6/../../../libiofunc.a(iolib.o)

collect2: error: ld returned 1 exit status

pls help me...i want siwtch on GPIO using library for c language..

thanking you

SIRANJEEVI.M

RE: BBB - BeagleBone Black I/O (GPIO) Library for C

Former Member — Tue, 03 May 2016 06:57:00 GMT

Hi friends,

I m using Beaglebone black in android OS , plz help me code for GPIO (read, write & direction set) using memory mapped.

RE: BBB - BeagleBone Black I/O (GPIO) Library for C

Former Member — Sat, 09 Apr 2016 08:40:15 GMT

Hello friends. I'm use BBB in angstrom os.

I'm having a problem with the library from vegetableavenger .

When I do the make for LED GPIO for example an error occurs:

problem show in image file..... [View:/resized-image/__size/620x349/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-f99c13a5-1709-4d1d-a3b9-89bc10aaad25/2654.contentimage_5F00_204288.png:620:349]

RE: BBB - BeagleBone Black I/O (GPIO) Library for C

mhaberler — Sat, 21 Mar 2015 23:22:55 GMT

Hi Shabaz,

great job and very useful for us over at machinekit.io - as we're doing a memory-mapped SPI driver which runs on Xenomai/BB

I assume the current status is in https://github.com/VegetableAvenger/BBBIOlib

any chance you can have a license attached for clarification? (BSD, MIT fine - no GPL-only or GPLv3 if possible)

thanks in advance,

Michael