Have you tried looking at the return status of the "system" call. That
may give a clue. Also it may be worth explicitly giving the path for echo:
int status;
status = *system("/bin/echo cape-bone-iio >
/sys/devices/bone_capemgr.9/slots");
*printf("status = %d\n", status);
HTH,
Dave.
On 12/21/2013 10:49 AM, Dhanushka Jayaweera wrote:
im getting nothing.. no errors. but it wont write the file either :(
im pretty new to BBB, its just my 5th day of using it... and I did
some googling, couldn't find a solution yet..
im using *"echo cape-bone-iio > /sys/devices/bone_capemgr.9/slots" *to
create the file for ADC. right now i have to execute the bash command
manually before i execute the c++ file which I wrote to read ADC values
Btw what is "writing the proper text directly to the slots file" ??
im kinda lost
On Saturday, December 21, 2013 10:07:30 PM UTC+5:30, Bas Laarhoven wrote:
On 21-12-2013 17:24, Dhanushka Jayaweera wrote:
both commands work in the terminal
So you know what to do, now find out how to do it :-)
What is the result from the system() call?
-- Bas
BTW: You can also try writing the proper text directly to the
slots file!
On Saturday, December 21, 2013 9:52:27 PM UTC+5:30, Dhanushka
Jayaweera wrote:
well i tried this
*system("echo cape-bone-iio >
/sys/devices/bone_capemgr.9/slots");*
*
*
still the same
On Saturday, December 21, 2013 9:40:04 PM UTC+5:30, Bas
Laarhoven wrote:
On 21-12-2013 17:04, Dhanushka Jayaweera wrote:
hey guys,
I want to add this bash command to my c++ program.
*echo cape-bone-iio > /sys/devices/bone_capemgr.*/slots*
i tried this
*#include<cstdio>*
*#include<cstdlib>*
*#include<unistd.h>*
*using namespace std;*
*int main() {*
* system("echo cape-bone-iio >
/sys/devices/bone_capemgr.*/slots");*
* return 0;*
*}*
but it does not work.
Can someone help me with this?
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Have you verified that the system command does wildcard
expansion?
(Replace the asterisk in the command by the proper number
and verify whether that works)
-- Bas
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