FreeDATA/tnc/helpers.py

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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Fri Dec 25 21:25:14 2020
@author: DJ2LS
"""
import time
import logging
import asyncio
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import crcengine
import static
import data_handler
def get_crc_8(data):
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"""
Author: DJ2LS
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Get the CRC8 of a byte string
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param: data = bytes()
"""
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crc_algorithm = crcengine.new('crc8-ccitt') # load crc8 library
crc_data = crc_algorithm(data)
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crc_data = crc_data.to_bytes(1, byteorder='big')
return crc_data
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def get_crc_16(data):
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"""
Author: DJ2LS
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Get the CRC16 of a byte string
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param: data = bytes()
"""
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crc_algorithm = crcengine.new('crc16-ccitt-false') # load crc16 library
crc_data = crc_algorithm(data)
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crc_data = crc_data.to_bytes(2, byteorder='big')
return crc_data
def watchdog():
"""
Author: DJ2LS
watchdog master function. Frome here we call the watchdogs
"""
while True:
time.sleep(0.01)
data_channel_keep_alive_watchdog()
def data_channel_keep_alive_watchdog():
"""
Author: DJ2LS
"""
if static.ARQ_STATE == 'DATA' and static.TNC_STATE == 'BUSY': # and not static.ARQ_SEND_KEEP_ALIVE:
time.sleep(0.01)
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if static.ARQ_DATA_CHANNEL_LAST_RECEIVED + 30 > time.time():
pass
else:
static.ARQ_DATA_CHANNEL_LAST_RECEIVED = 0
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logging.info("DATA [" + str(static.MYCALLSIGN, 'utf-8') + "]<<T>>[" + str(static.DXCALLSIGN, 'utf-8') + "] [BER." + str(static.BER) + "]")
arq_reset_frame_machine()
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def arq_reset_timeout(state):
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"""
Author: DJ2LS
"""
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static.ARQ_RX_ACK_TIMEOUT = state
static.ARQ_RX_FRAME_TIMEOUT = state
static.ARQ_RX_RPT_TIMEOUT = state
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def arq_reset_ack(state):
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"""
Author: DJ2LS
"""
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static.ARQ_ACK_RECEIVED = state
static.ARQ_RPT_RECEIVED = state
static.ARQ_FRAME_ACK_RECEIVED = state
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def arq_reset_frame_machine():
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"""
Author: DJ2LS
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Reset the frame machine parameters to default,
so we need to call just a function
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"""
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arq_reset_timeout(False)
arq_reset_ack(False)
static.TX_N_RETRIES = 0
static.ARQ_N_SENT_FRAMES = 0
static.ARQ_TX_N_FRAMES_PER_BURST = 0
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static.ARQ_TX_N_CURRENT_ARQ_FRAME = 0
static.ARQ_TX_N_TOTAL_ARQ_FRAMES = 0
static.ARQ_TX_N_CURRENT_ARQ_FRAME = 0
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static.ARQ_RX_N_CURRENT_ARQ_FRAME = 0
static.ARQ_N_ARQ_FRAMES_PER_DATA_FRAME = 0
static.ARQ_FRAME_BOF_RECEIVED = False
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static.ARQ_FRAME_EOF_RECEIVED = False
static.ARQ_RX_BURST_BUFFER = []
static.ARQ_RX_FRAME_BUFFER = []
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static.TNC_STATE = 'IDLE'
static.ARQ_STATE = 'IDLE'
###static.ARQ_CONNECTION_KEEP_ALIVE_RECEIVED = int(time.time()) # we need to reset the counter at this point
###static.ARQ_SEND_KEEP_ALIVE = True
static.CHANNEL_STATE = 'RECEIVING_SIGNALLING'
static.ARQ_READY_FOR_DATA = False
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static.ARQ_START_OF_TRANSMISSION = 0
def calculate_transfer_rate():
if static.ARQ_TX_N_TOTAL_ARQ_FRAMES == 0:
total_n_frames = static.ARQ_N_ARQ_FRAMES_PER_DATA_FRAME
elif static.ARQ_N_ARQ_FRAMES_PER_DATA_FRAME == 0:
total_n_frames = int.from_bytes(static.ARQ_TX_N_TOTAL_ARQ_FRAMES, "big")
total_bytes = (total_n_frames * static.ARQ_PAYLOAD_PER_FRAME)
total_transmission_time = time.time() - static.ARQ_START_OF_TRANSMISSION
burst_bytes = static.ARQ_PAYLOAD_PER_FRAME
burst_transmission_time = time.time() - static.ARQ_START_OF_BURST
static.ARQ_BITS_PER_SECOND_TRANSMISSION = int((total_bytes * 8) / total_transmission_time)
static.ARQ_BYTES_PER_MINUTE_TRANSMISSION = int(((total_bytes) / total_transmission_time) * 60)
static.ARQ_BITS_PER_SECOND_BURST = int((burst_bytes * 8) / burst_transmission_time)
static.ARQ_BYTES_PER_MINUTE_BURST = int(((burst_bytes) / burst_transmission_time) * 60)
return [static.ARQ_BITS_PER_SECOND_TRANSMISSION, static.ARQ_BYTES_PER_MINUTE_TRANSMISSION, static.ARQ_BITS_PER_SECOND_BURST, static.ARQ_BYTES_PER_MINUTE_BURST]
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def add_to_heard_stations(dxcallsign,dxgrid, datatype, snr):
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# check if buffer empty
if len(static.HEARD_STATIONS) == 0:
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static.HEARD_STATIONS.append([dxcallsign,dxgrid, int(time.time()), datatype, snr])
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# if not, we search and update
else:
for i in range(0, len(static.HEARD_STATIONS)):
# update callsign with new timestamp
if static.HEARD_STATIONS[i].count(dxcallsign) > 0:
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static.HEARD_STATIONS[i] = [dxcallsign,dxgrid, int(time.time()), datatype, snr]
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break
# insert if nothing found
if i == len(static.HEARD_STATIONS) - 1:
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static.HEARD_STATIONS.append([dxcallsign,dxgrid, int(time.time()), datatype, snr])
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break
# for idx, item in enumerate(static.HEARD_STATIONS):
# if dxcallsign in item:
# item = [dxcallsign, int(time.time())]
# static.HEARD_STATIONS[idx] = item
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def setup_logging():
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"""
Author: DJ2LS
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Set the custom logging format so we can use colors
# https://stackoverflow.com/questions/384076/how-can-i-color-python-logging-output
# 'DEBUG' : 37, # white
# 'INFO' : 36, # cyan
# 'WARNING' : 33, # yellow
# 'ERROR' : 31, # red
# 'CRITICAL': 41, # white on red bg
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"""
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logging.basicConfig(format='%(asctime)s.%(msecs)03d %(levelname)s:\t%(message)s', datefmt='%H:%M:%S', level=logging.INFO)
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logging.addLevelName(logging.DEBUG, "\033[1;36m%s\033[1;0m" % logging.getLevelName(logging.DEBUG))
logging.addLevelName(logging.INFO, "\033[1;37m%s\033[1;0m" % logging.getLevelName(logging.INFO))
logging.addLevelName(logging.WARNING, "\033[1;33m%s\033[1;0m" % logging.getLevelName(logging.WARNING))
logging.addLevelName(logging.ERROR, "\033[1;31m%s\033[1;0m" % "FAILED")
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#logging.addLevelName( logging.ERROR, "\033[1;31m%s\033[1;0m" % logging.getLevelName(logging.ERROR))
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logging.addLevelName(logging.CRITICAL, "\033[1;41m%s\033[1;0m" % logging.getLevelName(logging.CRITICAL))
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logging.addLevelName(25, "\033[1;32m%s\033[1;0m" % "SUCCESS")
logging.addLevelName(24, "\033[1;34m%s\033[1;0m" % "DATA")
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