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Open a character device
Hai, We created character device in dev/ folder.
from normal c application to open device in this folder we use open() system call, read the data from that using read().
my question is from Qt how can I open the device and read the data from that device?
I tired using QFile, but it is not opened.
can any one give some example regarding this
Thanks in advance
Is there possibly a permissions problem with the device you created? Is it readable by the user which is running the app?
Can you show a snippet of your code where you're trying to open and read from the device?
QFile *file = new QFile("/dev/fp");
qDebug()<<"file not opened\n";
this is tested on desktop, but my application is in embedded development board
How about the file permissions on /dev/fp are they reasonable for the user?
its not readable.
Do you need to chmod a+r /dev/fp then?
we have already root privileges in dev folder. but when i open from qt its not opened that file any thing different?