Python code to start & stop Bluetooth carrier TX for bt_mfg_test app

mbt_tone.py

#!/anaconda3/bin/python

import serial
import sys
import ctypes

def tone(ser, frequency, power, onoff = True):
    if (frequency < 2402) or (frequency > 2480):
        print("Frequency must be between 2402-2480 Mhz")
    if type(frequency) != int:
        print("Frequency must be an integer")
    
    cmd = [0x01, 0x014, 0xfc, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]
    
    if onoff:
        cmd[4] = 0
    else:
        cmd[4] = 1
    
    cmd[5] = frequency-2400
    cmd[6] = 0
    cmd[7] = 0
    if onoff:
        cmd[8] = 8
    else:
        cmd[8] = 0
        
    cmd[9] = ctypes.c_uint8( power ).value
    
    ser.write(cmd)
    res = ser.read(7)
    print(res)
    
def tone_all_off(ser):
    cmd = [ int(x,16) for x in "01 14 fc 07 01 02 00 00 00 00 00".split(" ") ]
    ser.write(cmd)
    res = ser.read(7)
    print(res)

def main():
    if len(sys.argv) != 5:
        print("Bad arguments")
        print("Usage:   mbt_tone <COMxx|/dev/...> <onoff> <frequency> <power>")
        sys.exit(-1)

    COMPORT = sys.argv[1]
    onoff = int(sys.argv[2])
    frequency = int(sys.argv[3])
    power = int(sys.argv[4])

    print("Opening serial...")
    try:
        ser = serial.Serial(port = "/dev/tty.usbserial-A12TT9R4", baudrate = 115200, rtscts = False, timeout=1)
    except Exception:
        print("Error:")
        print(Exception)
        sys.exit(-1)

    if frequency == 0:
        tone_all_off(ser)
    else:
        tone( ser, frequency, power, int(onoff) )


if __name__ == "__main__":
    main()