def get_current_ctrl(self):
"""
It gets the current control. It is only a wrapper of the setCtrl
method of zCtrl; user can use directly that method
"""
try:
fd_num = os.open(self.cur_ctrl, os.O_RDONLY)
bin_ctrl = os.read(fd_num, 512)
os.close(fd_num)
except:
raise
else:
ctrl = ZioCtrl()
ctrl.unpack_to_ctrl(bin_ctrl)
return ctrl
def read_ctrl(self):
"""
If the control char device is open and it is readable, then it reads
the control structure. Every time it internally store the control; it
will be used as default when no control is provided
"""
if self.__fdc == None or not self.is_ctrl_readable():
return None
# Read the control
bin_ctrl = os.read(self.__fdc, 512)
ctrl = ZioCtrl()
self.lastctrl = ctrl
ctrl.unpack_to_ctrl(bin_ctrl)
return ctrl
