I know that Linux gives out a 9-bit 2's compliment data out of the /dev/input/mice. I also know that you can get that data via /dev/hidraw0 where hidraw is your USB device giving out raw data from the HID. I know the data sent is the delta of the movement (displacement) rather than position. By the by I can also view gibberish data via the "cat /dev/input/mice". My question is :
Can you please tell me by using the Python language how can I read this data? I really rather get that data as in simple integers. But it has proven hard. The real problem is reading the damn data. Is there a way to read bits and do bit arithmetic? ( Currently i'm not worrying over root user related issues. Please assume the script is run in root.)
(My main reference was http://www.computer-engineering.org/ps2mouse/)
I'm on a basic device and not having access to X or ... so event.py doesn't works.
So here's my simpler decode code part to interpret from "deprecated" '/dev/input/mice':
import struct
file = open( "/dev/input/mice", "rb" );
def getMouseEvent():
buf = file.read(3);
button = ord( buf[0] );
bLeft = button & 0x1;
bMiddle = ( button & 0x4 ) > 0;
bRight = ( button & 0x2 ) > 0;
x,y = struct.unpack( "bb", buf[1:] );
print ("L:%d, M: %d, R: %d, x: %d, y: %d\n" % (bLeft,bMiddle,bRight, x, y) );
# return stuffs
while( 1 ):
getMouseEvent();
file.close();