ADSB_Encoder.py 文件源码

def frame_1090es_ppm_modulate(even, odd):
    ppm = [ ]

    for i in range(48):    # pause
        ppm.append( 0 )

    ppm.append( 0xA1 )   # preamble
    ppm.append( 0x40 )

    for i in range(len(even)):
        word16 = numpy.packbits(manchester_encode(~even[i]))
        ppm.append(word16[0])
        ppm.append(word16[1])


    for i in range(100):    # pause
        ppm.append( 0 )

    ppm.append( 0xA1 )   # preamble
    ppm.append( 0x40 )

    for i in range(len(odd)):
        word16 = numpy.packbits(manchester_encode(~odd[i]))
        ppm.append(word16[0])
        ppm.append(word16[1])

    for i in range(48):    # pause
        ppm.append( 0 )

    #print '[{}]'.format(', '.join(hex(x) for x in ppm))

    return bytearray(ppm)