#!/usr/bin/env python3

# Copyright (c) 2019, NVIDIA CORPORATION. All rights reserved.
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
# and/or sell copies of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
# DEALINGS IN THE SOFTWARE.

import argparse
from Jetson import board
import sys


def main():
    parser = argparse.ArgumentParser(
        "Display configuration for Jetson 40-pin expansion header")
    parser.add_argument("-p", "--pin", help="Pin number")
    args = parser.parse_args()

    jetson = board.Board()
    pincount = jetson.header.pin_count()

    if args.pin is not None:
        pin = int(args.pin)

        if pin < 1 or pin > pincount:
            raise IndexError("Invalid Pin number!")

        print(jetson.header.pin_get_label(pin))
    else:
        for index in range(pincount):
            label = jetson.header.pin_get_label(index + 1)
            print("%2d: %s" % (index + 1, label))


if __name__ == '__main__':
    main()
