#----------------------------------------------------------------------
#   SABVABAA Hovercraft Seismic Profiling Gun Control Program
#
#  University of Bergen, Norway
#  Dept. of Earth Science
#
#  Rev  Date          By  Description
# ---------------------------------------------------------------------
#  0.2  Apr 11, 2010  OM  Small modification for use with
#                         USB/Serial adapter.
#  0.1  Jun 08, 2008  OM  Initial version.
#----------------------------------------------------------------------

import time
import serial
import winsound
from sys import exit


#--------------------------------------------------------------------------
#   C O N S T A N T S
#--------------------------------------------------------------------------

VERSION   = "Ver. 0.2  Date: 11 April 2010"
COM_PORT  = 4		# '1' = COM1 -> On the rear of the DELL Latitude D630
                # '4' = COM4 -> USB/SERIAL adapter (check in Control Panel -> System -> Hardware -> ..
  






#------------------------------------------------------------
#             M A I N   P R O G R A M
#------------------------------------------------------------


print '''
==============================================================
            S A B V A B A A   H O V E R C R A F T

                    Echo Sounder logging                  
==============================================================

Terminate program by CTRL-C (may have to wait a bit)
'''
print
print VERSION
print '''
Dept. of Earth Science  -  University of Bergen, Norway 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
'''

#--- Open COM port for GUN control
#--- DTR -> GUN1 -> fire from 0 to 1 state
#--- RTS -> GUN2 -> ---"---

GPS_PORT = -1
ECHO_SOUNDER_PORT = -1


for k in range(20):
    print "Checking COM%d ..." % (k+1),
    
    ValidSerialPort = True
    
    try:
        ser = serial.Serial(k,baudrate=4800, timeout=2)
    except:
        ValidSerialPort = False
    
    
    
    
    if ValidSerialPort:
    
        Data  = ser.readline()
        Data += ser.readline()
        ser.close()
        
        if '$GPGGA' in Data:
            print "OK - GPS!"
            GPS_PORT = k
            
        elif '$SDDPT' in Data:
            print "OK - Echo Sounder!"
            ECHO_SOUNDER_PORT = k
            
        else:              
            print "OK"
    else:
        print
        
    time.sleep(1)



print "Done"

if GPS_PORT >= 0:
    print "GPS on COM%d" % (GPS_PORT + 1)
    
if ECHO_SOUNDER_PORT >= 0:
    print "Echo Sounder on COM%d" % (ECHO_SOUNDER_PORT + 1)   
    

response = raw_input("Type any key to quit ")

exit()



#-------------------------------------    END   OF    PROGRAM     -----









try:
    ser = serial.Serial(COM_PORT-1)     # Subtract one as parameter starts from zero.
except:
    print
    print "++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++"
    print "+++++++++++++++++     E R R O R      +++++++++++++++++++++++++++"
    print "++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++"
    print "Could not open COM%d" % int(COM_PORT)
    print "Check in:"
    print "   Control Panel -> System -> Hardware -> Devices -> Ports"
    print "for correct COM port assignment."
    print "Edit COM_PORT constant in this program accordingly."
    print "++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++"
    exit()




    
ser.setDTR(level=0)

ShotInterval = int(raw_input("Shot interval [s]: "))
print "Shot interval = ", ShotInterval, "s"
print "Shooting in 5 seconds ..."
t = 4
while t > 0:
    print t
    t -= 1
    time.sleep(1)
print
FireAirGun()

#-------------- Loop eternally. Interrupt by CTRL-C
while 1:
    time.sleep(ShotInterval)

    

ser.close()
exit()