import serial

port = serial.Serial("/dev/ttyAMA0", baudrate=9600, timeout=3.0)

#serial strings
#select audio
a = "0ACS\r\n"
#select video
v = "0VCS\r\n"
#select both
av = "0AVS\r\n"


# define output variable
def outputSelect(command):
    command = "0CO" + command + "\r\n"
    port.write(command)
#    print command
    
# define input variable
def inputSelect(command):
    command = "0CI" + command + "\r\n"
    port.write(command)
#    print command

print "VAMS 0808 ssh interface V1.0 created by luke and matt :)"
print "for a list of commands, type '?'"
while True:
    command = raw_input ("select output channel: ")
    if command == "a":
        port.write(a)
        print "audio selected"
    elif command == "v":
        port.write(v)
        print "video selected"
    elif command == "av":
        port.write(av)
        print "audio & video selected"
#select output channel
    elif int(command) >0 and int(command) <9:
        outputSelect(command)
#        print "output win"
#select input channel
        inp = raw_input ("now select input channel: ")
        if int(inp) >0 and int(inp) <9:
            inputSelect(inp)
#            print "input win"
    elif command == "?":
        print "here are a list of commands:"
        print "a = select audio"
        print "v = select video"
        print "av = select audio and video"
        print "o = output"
        print "i = input"
    else:
        print "you've entered an invalid command."
        print "for a list of commands, type '?'"