>
> >>> fd = open('/dev/ppi0','w')
> >>> fcntl.ioctl(fd.fileno(),'PPISCTRL',10000000)
> Traceback (most recent call last):
> File "<stdin>", line 1, in ?
> TypeError: an integer is required
>
> i guess i'm failing to properly define the int i need for the 8byte
> value ineed to send the port to set pins high /low
Python doesn't know about PPISCTRL - it has no way of knowing all
"secret", OS-specific constants for ioctl-calls.
So, you need to figure out the numeric value of that constant .- look it
up in the appropriate header-file.
Then, you do have the next problem with passing that 10000000 value of
yours. ioctl expects strings or buffers as parameters which contain a
byte-representation of the value you want to set. This is an snippet I
use to read the event device capabilities under linnux:
buf = array.array('c', [' ' for i in xrange(EV_MAX / 8 + 1)])
fcntl.ioctl(self._fd, EVIOCGBIT(0, len(buf)), buf, True)
caps = struct.unpack("I", buf)[0]
HTH,
Diez
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