gen_fq_hop_v202.py

freq_hopping = [
 [ 0x27, 0x1B, 0x39, 0x28, 0x24, 0x22, 0x2E, 0x36,
   0x19, 0x21, 0x29, 0x14, 0x1E, 0x12, 0x2D, 0x18 ], #  00
 [ 0x2E, 0x33, 0x25, 0x38, 0x19, 0x12, 0x18, 0x16,
   0x2A, 0x1C, 0x1F, 0x37, 0x2F, 0x23, 0x34, 0x10 ], #  01
 [ 0x11, 0x1A, 0x35, 0x24, 0x28, 0x18, 0x25, 0x2A,
   0x32, 0x2C, 0x14, 0x27, 0x36, 0x34, 0x1C, 0x17 ], #  02
 [ 0x22, 0x27, 0x17, 0x39, 0x34, 0x28, 0x2B, 0x1D,
   0x18, 0x2A, 0x21, 0x38, 0x10, 0x26, 0x20, 0x1F ]  #  03
]


def gen_fh(tx_id):
    sum = tx_id[0] + tx_id[1] + tx_id[2]
    # Base row is defined by lowest 2 bits
    fh_row = freq_hopping[sum & 0x03]
    # Higher 3 bits define increment to corresponding row
    increment = (sum & 0x1e) >> 2
    rf_channels = []
    for i in range(16):
        val = fh_row[i] + increment
        # Strange avoidance of channels divisible by 16
        if val & 0x0f: val -= 3
        rf_channels.append(val)
    return rf_channels


def main():
   print " ".join(map(lambda x: "%02x" % x, gen_fh([0x43, 0x3A, 0x01])))

main()