#!/usr/bin/python
import array, fcntl, os
from time import sleep
# test program to Shutdown or Restart Pi using buttons on 4D Systems 4DPi displays
#LCD4DPI_GET_KEYS = -2147202303
_IOC_NRBITS
_IOC_TYPEBITS
_IOC_SIZEBITS
_IOC_DIRBITS
_IOC_DIRMASK
_IOC_NRMASK
_IOC_TYPEMASK
= 8
= 8
= 14
= 2
_IOC_NRSHIFT =
_IOC_TYPESHIFT
_IOC_SIZESHIFT
_IOC_DIRSHIFT
= (1 << _IOC_DIRBITS) - 1
= (1 << _IOC_NRBITS) - 1
= (1 << _IOC_TYPEBITS ) - 1
0
= _IOC_NRSHIFT+_IOC_NRBITS
= _IOC_TYPESHIFT+_IOC_TYPEBITS
= _IOC_SIZESHIFT+_IOC_SIZEBITS
_IOC_NONE = 0
_IOC_WRITE = 1
_IOC_READ = 2
def _IOC(dir, type, nr, size):
# print 'dirshift {}, typeshift {}, nrshift {}, sizeshift
{}'.format(_IOC_DIRSHIFT, _IOC_TYPESHIFT, _IOC_NRSHIFT, _IOC_SIZESHIFT)
ioc = (dir << _IOC_DIRSHIFT ) | (type << _IOC_TYPESHIFT ) | (nr << _IOC_NRSHIFT )
| (size << _IOC_SIZESHIFT)
if ioc > 2147483647: ioc -= 4294967296
return ioc
#def _IO(type, nr):
# return _IOC(_IOC_NONE, type, nr, 0)
def _IOR(type,nr,size):
return _IOC(_IOC_READ, type, nr, size)
#def _IOW(type,nr,size):
# return _IOC(_IOC_WRITE, type, nr, sizeof(size))
LCD4DPI_GET_KEYS = _IOR(ord('K'), 1, 4)
#print 'ssd {} {:12} {:0>8x} {:0>32b}'.format(ssd1289, hex(ssd1289), ssd1289,
ssd1289)
buf = array.array('h',[0])
with open('/dev/fb1', 'rw') as fd:
while True:
fcntl.ioctl(fd, LCD4DPI_GET_KEYS, buf, 1) # execute ioctl call to read the keys
keys = buf[0]
if not keys & 0b00001:
break
if not keys & 0b10000:
os.system("sudo shutdown -h now")
break
if not keys & 0b01000:
os.system("sudo reboot")
break;
sleep(0.1)