mirror of
https://github.com/DJ2LS/FreeDATA
synced 2024-05-14 08:04:33 +00:00
improved states
This commit is contained in:
DJ2LS
GitHub
parent
e32f6b3c3f
commit
c709f8b604
460
arq.py
Normal file
460
arq.py
Normal file
|
|
@ -0,0 +1,460 @@
|
|||
#!/usr/bin/env python3
|
||||
# -*- coding: utf-8 -*-
|
||||
"""
|
||||
Created on Sun Dec 27 20:43:40 2020
|
||||
|
||||
@author: DJ2LS
|
||||
"""
|
||||
|
||||
import logging
|
||||
import threading
|
||||
import time
|
||||
from random import randrange
|
||||
|
||||
import static
|
||||
import modem
|
||||
import helpers
|
||||
import main
|
||||
|
||||
|
||||
modem = modem.RF()
|
||||
|
||||
static.ARQ_PAYLOAD_PER_FRAME = static.FREEDV_DATA_PAYLOAD_PER_FRAME - 3 #6?!
|
||||
static.ARQ_ACK_PAYLOAD_PER_FRAME = 14 - 2#
|
||||
|
||||
#def arq_ack_timeout():
|
||||
# static.ARQ_ACK_TIMEOUT = 1
|
||||
|
||||
#def arq_rpt_timeout():
|
||||
# static.ARQ_RPT_TIMEOUT = True
|
||||
|
||||
def data_received(data_in):
|
||||
|
||||
|
||||
# arqframe = frame_type + \ # 1 [:1] # frame type and current number of arq frame of (current) burst
|
||||
# bytes([static.ARQ_TX_N_FRAMES_PER_BURST]) + \ # 1 [1:2] # total number of arq frames per (current) burst
|
||||
# static.ARQ_N_CURRENT_ARQ_FRAME + \ # 2 [2:4] # current arq frame number
|
||||
# static.ARQ_N_TOTAL_ARQ_FRAMES + \ # 2 [4:6] # total number arq frames
|
||||
# static.ARQ_BURST_PAYLOAD_CRC + \ # 2 [6:8] # arq crc
|
||||
# payload_data # N [8:N] # payload data
|
||||
|
||||
|
||||
|
||||
static.ARQ_N_FRAME = int.from_bytes(bytes(data_in[:1]), "big") - 10 #get number of burst frame
|
||||
static.ARQ_N_RX_FRAMES_PER_BURSTS = int.from_bytes(bytes(data_in[1:2]), "big") #get number of bursts from received frame
|
||||
static.ARQ_RX_N_CURRENT_ARQ_FRAME = int.from_bytes(bytes(data_in[2:4]), "big") #get current number of total frames
|
||||
static.ARQ_N_ARQ_FRAMES_PER_DATA_FRAME = int.from_bytes(bytes(data_in[4:6]), "big") # get get total number of frames
|
||||
static.ARQ_BURST_PAYLOAD_CRC = data_in[6:8]
|
||||
|
||||
|
||||
logging.debug("----------------------------------------------------------------")
|
||||
logging.debug("ARQ_N_FRAME: " + str(static.ARQ_N_FRAME))
|
||||
logging.debug("ARQ_N_RX_FRAMES_PER_BURSTS: " + str(static.ARQ_N_RX_FRAMES_PER_BURSTS))
|
||||
logging.debug("ARQ_RX_N_CURRENT_ARQ_FRAME: " + str(static.ARQ_RX_N_CURRENT_ARQ_FRAME))
|
||||
logging.debug("ARQ_N_ARQ_FRAMES_PER_DATA_FRAME: " + str(static.ARQ_N_ARQ_FRAMES_PER_DATA_FRAME))
|
||||
logging.debug("static.ARQ_BURST_PAYLOAD_CRC: " + str(static.ARQ_BURST_PAYLOAD_CRC))
|
||||
logging.debug("----------------------------------------------------------------")
|
||||
|
||||
|
||||
arq_percent_burst = int((static.ARQ_N_FRAME / static.ARQ_N_RX_FRAMES_PER_BURSTS)*100)
|
||||
arq_percent_frame = int(((static.ARQ_RX_N_CURRENT_ARQ_FRAME)/static.ARQ_N_ARQ_FRAMES_PER_DATA_FRAME)*100)
|
||||
|
||||
logging.info("ARQ | RX | ARQ FRAME [" + str(static.ARQ_N_FRAME) + "/" + str(static.ARQ_N_RX_FRAMES_PER_BURSTS) + "] [" + str(arq_percent_burst).zfill(3) + "%] --- TOTAL [" + str(static.ARQ_RX_N_CURRENT_ARQ_FRAME) + "/" + str(static.ARQ_N_ARQ_FRAMES_PER_DATA_FRAME) + "] [" + str(arq_percent_frame).zfill(3) + "%]" )
|
||||
|
||||
|
||||
|
||||
#allocate ARQ_RX_FRAME_BUFFER as a list with "None" if not already done. This should be done only once per burst!
|
||||
# here we will save the N frame of a data frame to N list position so we can explicit search for it
|
||||
|
||||
try:
|
||||
static.ARQ_RX_FRAME_BUFFER[static.ARQ_RX_N_CURRENT_ARQ_FRAME] = bytes(data_in)
|
||||
|
||||
except IndexError:
|
||||
|
||||
static.ARQ_RX_FRAME_BUFFER = []
|
||||
for i in range(0,static.ARQ_N_ARQ_FRAMES_PER_DATA_FRAME+1):
|
||||
static.ARQ_RX_FRAME_BUFFER.insert(i,None)
|
||||
|
||||
static.ARQ_RX_FRAME_BUFFER[static.ARQ_RX_N_CURRENT_ARQ_FRAME] = bytes(data_in)
|
||||
static.ARQ_FRAME_BOF_RECEIVED = False
|
||||
static.ARQ_FRAME_EOF_RECEIVED = False
|
||||
|
||||
|
||||
try:
|
||||
static.ARQ_RX_BURST_BUFFER[static.ARQ_N_FRAME] = bytes(data_in)
|
||||
|
||||
except IndexError:
|
||||
|
||||
static.ARQ_RX_BURST_BUFFER = []
|
||||
for i in range(0,static.ARQ_N_RX_FRAMES_PER_BURSTS+1):
|
||||
static.ARQ_RX_BURST_BUFFER.insert(i,None)
|
||||
|
||||
static.ARQ_RX_BURST_BUFFER[static.ARQ_N_FRAME] = bytes(data_in)
|
||||
|
||||
#for i in range(len(static.ARQ_RX_BURST_BUFFER)):
|
||||
# print(static.ARQ_RX_BURST_BUFFER[i])
|
||||
|
||||
# - ------------------------- ARQ BURST CHECKER
|
||||
|
||||
# run only if we recieved all ARQ FRAMES per ARQ BURST
|
||||
if static.ARQ_RX_BURST_BUFFER.count(None) == 1: #count nones
|
||||
logging.info("ARQ | TX | BURST ACK")
|
||||
|
||||
#BUILDING ACK FRAME FOR BURST -----------------------------------------------
|
||||
ack_payload = b'BURST_ACK'
|
||||
ack_frame = b'<' + ack_payload # < = 60
|
||||
|
||||
#TRANSMIT ACK FRAME FOR BURST-----------------------------------------------
|
||||
modem.transmit_arq_ack(ack_frame)
|
||||
|
||||
#clear burst buffer
|
||||
static.ARQ_RX_BURST_BUFFER = []
|
||||
|
||||
#if decoded N frames are unequal to expected frames per burst
|
||||
elif static.ARQ_N_FRAME == static.ARQ_N_RX_FRAMES_PER_BURSTS and static.ARQ_RX_BURST_BUFFER.count(None) != 1:
|
||||
|
||||
# --------------- CHECK WHICH BURST FRAMES WE ARE MISSING -------------------------------------------
|
||||
|
||||
missing_frames = b''
|
||||
for burstnumber in range(1,len(static.ARQ_RX_BURST_BUFFER)):
|
||||
|
||||
if static.ARQ_RX_BURST_BUFFER[burstnumber] == None:
|
||||
frame_number = burstnumber.to_bytes(2, byteorder='big')
|
||||
missing_frames += frame_number
|
||||
|
||||
logging.info("ARQ | TX | RPT ARQ FRAMES [" + str(missing_frames) + "]")
|
||||
|
||||
#BUILDING RPT FRAME FOR BURST -----------------------------------------------
|
||||
rpt_payload = missing_frames
|
||||
rpt_frame = b'>' + rpt_payload #> = 63
|
||||
|
||||
#TRANSMIT RPT FRAME FOR BURST-----------------------------------------------
|
||||
modem.transmit_arq_ack(rpt_frame)
|
||||
|
||||
|
||||
|
||||
# ---------------------------- FRAME MACHINE
|
||||
|
||||
# --------------- IF LIST NOT CONTAINS "None" stick everything together
|
||||
complete_data_frame = bytearray()
|
||||
#print("static.ARQ_RX_FRAME_BUFFER.count(None)" + str(static.ARQ_RX_FRAME_BUFFER.count(None)))
|
||||
if static.ARQ_RX_FRAME_BUFFER.count(None) == 1: ## 1 because position 0 of list will alaways be None in our case
|
||||
#print("DECODING FRAME!")
|
||||
for frame in range(1,len(static.ARQ_RX_FRAME_BUFFER)):
|
||||
raw_arq_frame = static.ARQ_RX_FRAME_BUFFER[frame]
|
||||
arq_frame_payload = raw_arq_frame[8:]
|
||||
|
||||
# -------- DETECT IF WE RECEIVED A FRAME HEADER THEN SAVE DATA TO GLOBALS
|
||||
if arq_frame_payload[2:4].startswith(static.FRAME_BOF):
|
||||
static.FRAME_CRC = arq_frame_payload[:2]
|
||||
static.ARQ_FRAME_BOF_RECEIVED = True
|
||||
|
||||
arq_frame_payload = arq_frame_payload.split(static.FRAME_BOF)
|
||||
arq_frame_payload = arq_frame_payload[1]
|
||||
|
||||
# -------- DETECT IF WE RECEIVED A FRAME FOOTER THEN SAVE DATA TO GLOBALS
|
||||
if arq_frame_payload.rstrip(b'\x00').endswith(static.FRAME_EOF):
|
||||
static.ARQ_FRAME_EOF_RECEIVED = True
|
||||
|
||||
arq_frame_payload = arq_frame_payload.split(static.FRAME_EOF)
|
||||
arq_frame_payload = arq_frame_payload[0]
|
||||
|
||||
|
||||
# --------- AFTER WE SEPARATED BOF AND EOF, STICK EVERYTHING TOGETHER
|
||||
complete_data_frame = complete_data_frame + arq_frame_payload
|
||||
|
||||
|
||||
#check if Begin of Frame BOF and End of Frame EOF are received, then start calculating CRC and sticking everything together
|
||||
if static.ARQ_FRAME_BOF_RECEIVED == True and static.ARQ_FRAME_EOF_RECEIVED == True:
|
||||
|
||||
frame_payload_crc = helpers.get_crc_16(complete_data_frame)
|
||||
|
||||
#IF THE FRAME PAYLOAD CRC IS EQUAL TO THE FRAME CRC WHICH IS KNOWN FROM THE HEADER --> SUCCESS
|
||||
if frame_payload_crc == static.FRAME_CRC:
|
||||
logging.info("ARQ | RX | DATA FRAME SUCESSFULLY RECEIVED! - TIME TO PARTY")
|
||||
#append received frame to RX_BUFFER
|
||||
static.RX_BUFFER.append(complete_data_frame)
|
||||
|
||||
#BUILDING ACK FRAME FOR DATA FRAME -----------------------------------------------
|
||||
ack_payload = b'FRAME_ACK'
|
||||
ack_frame = b'='+ ack_payload + bytes(static.FRAME_CRC) # < = 61
|
||||
|
||||
#TRANSMIT ACK FRAME FOR BURST-----------------------------------------------
|
||||
time.sleep(3) #0.5
|
||||
logging.info("ARQ | TX | ARQ DATA FRAME ACK [" + str(static.FRAME_CRC.hex()) +"]")
|
||||
|
||||
modem.transmit_arq_ack(ack_frame)
|
||||
|
||||
# clearing buffers and resetting counters
|
||||
static.ARQ_RX_BURST_BUFFER = []
|
||||
static.ARQ_RX_FRAME_BUFFER = []
|
||||
static.ARQ_FRAME_BOF_RECEIVED = False
|
||||
static.ARQ_FRAME_EOF_RECEIVED = False
|
||||
static.ARQ_N_ARQ_FRAMES_PER_DATA_FRAME = 0
|
||||
|
||||
#print("----------------------------------------------------------------")
|
||||
#print(static.RX_BUFFER[-1])
|
||||
#print("----------------------------------------------------------------")
|
||||
|
||||
else:
|
||||
logging.info("ARQ | RX | DATA FRAME NOT SUCESSFULLY RECEIVED!")
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
def transmit(data_out):
|
||||
|
||||
static.ARQ_PAYLOAD_PER_FRAME = static.FREEDV_DATA_PAYLOAD_PER_FRAME - 8 #3 ohne ARQ_TX_N_FRAMES_PER_BURST
|
||||
frame_header_length = 4
|
||||
|
||||
n_arq_frames_per_data_frame = (len(data_out)+frame_header_length) // static.ARQ_PAYLOAD_PER_FRAME + ((len(data_out)+frame_header_length) % static.ARQ_PAYLOAD_PER_FRAME > 0)
|
||||
|
||||
frame_payload_crc = helpers.get_crc_16(data_out)
|
||||
|
||||
# This is the total frame with frame header, which will be send
|
||||
data_out = frame_payload_crc + static.FRAME_BOF + data_out + static.FRAME_EOF
|
||||
# 2 2 N 2
|
||||
|
||||
# --------------------------------------------- LETS CREATE A BUFFER BY SPLITTING THE FILES INTO PEACES
|
||||
static.TX_BUFFER = [data_out[i:i+static.ARQ_PAYLOAD_PER_FRAME] for i in range(0, len(data_out), static.ARQ_PAYLOAD_PER_FRAME)]
|
||||
static.TX_BUFFER_SIZE = len(static.TX_BUFFER)
|
||||
|
||||
logging.info("ARQ | TX | DATA FRAME --- BYTES: " + str(len(data_out)) + " ARQ FRAMES: " + str(static.TX_BUFFER_SIZE))
|
||||
|
||||
# --------------------------------------------- THIS IS THE MAIN LOOP-----------------------------------------------------------------
|
||||
|
||||
static.ARQ_N_SENT_FRAMES = 0 # SET N SENT FRAMES TO 0 FOR A NEW SENDING CYCLE
|
||||
while static.ARQ_N_SENT_FRAMES <= static.TX_BUFFER_SIZE:
|
||||
|
||||
static.ARQ_TX_N_FRAMES_PER_BURST = get_n_frames_per_burst()
|
||||
|
||||
# ----------- CREATE FRAME TOTAL PAYLOAD TO BE ABLE TO CREATE CRC FOR IT
|
||||
try: # DETECT IF LAST BURST TO PREVENT INDEX ERROR OF BUFFER
|
||||
|
||||
for i in range(static.ARQ_TX_N_FRAMES_PER_BURST): # Loop through TX_BUFFER LIST
|
||||
len(static.TX_BUFFER[static.ARQ_N_SENT_FRAMES + i]) #we calculate the length to trigger a list index error
|
||||
|
||||
except IndexError: # IF LAST BURST DETECTED BUILD CRC WITH LESS FRAMES AND SET static.ARQ_TX_N_FRAMES_PER_BURST TO VALUE OF REST!
|
||||
|
||||
if static.ARQ_N_SENT_FRAMES == 0 and (static.ARQ_TX_N_FRAMES_PER_BURST > static.TX_BUFFER_SIZE): #WE CANT DO MODULO 0 --> CHECK IF FIRST FRAME == LAST FRAME
|
||||
static.ARQ_TX_N_FRAMES_PER_BURST = static.TX_BUFFER_SIZE
|
||||
|
||||
elif static.ARQ_N_SENT_FRAMES == 1 and (static.ARQ_TX_N_FRAMES_PER_BURST > static.TX_BUFFER_SIZE): # MODULO 1 WILL ALWAYS BE 0 --> THIS FIXES IT
|
||||
static.ARQ_TX_N_FRAMES_PER_BURST = static.TX_BUFFER_SIZE - static.ARQ_N_SENT_FRAMES
|
||||
|
||||
else:
|
||||
static.ARQ_TX_N_FRAMES_PER_BURST = (static.TX_BUFFER_SIZE % static.ARQ_N_SENT_FRAMES)
|
||||
|
||||
#--------------------------------------------- N ATTEMPTS TO SEND BURSTS IF ACK RECEPTION FAILS
|
||||
for static.TX_N_RETRIES in range(static.TX_N_MAX_RETRIES):
|
||||
|
||||
|
||||
|
||||
|
||||
if static.ARQ_N_SENT_FRAMES + 1 <= static.TX_BUFFER_SIZE:
|
||||
logging.info("ARQ | TX | F:[" + str(static.ARQ_N_SENT_FRAMES+1) + "-" + str(static.ARQ_N_SENT_FRAMES + static.ARQ_TX_N_FRAMES_PER_BURST) + "] | T:[" + str(static.ARQ_N_SENT_FRAMES) + "/" + str(static.TX_BUFFER_SIZE) + "] [" + str(int(static.ARQ_N_SENT_FRAMES/(static.TX_BUFFER_SIZE)*100)).zfill(3) + "%] | A:[" + str(static.TX_N_RETRIES+1) + "/" + str(static.TX_N_MAX_RETRIES) + "]")
|
||||
|
||||
|
||||
# lets start a thread to transmit nonblocking
|
||||
TRANSMIT_ARQ_BURST_THREAD = threading.Thread(target=modem.transmit_arq_burst, name="TRANSMIT_ARQ_BURST")
|
||||
TRANSMIT_ARQ_BURST_THREAD.start()
|
||||
|
||||
# lets wait during sending. After sending is finished we will continue
|
||||
while static.ARQ_STATE == 'SENDING_DATA':
|
||||
time.sleep(0.01)
|
||||
#print("sending.....")
|
||||
|
||||
|
||||
# --------------------------- START TIMER FOR WAITING FOR ACK ---> IF TIMEOUT REACHED, ACK_TIMEOUT = 1
|
||||
#reset timer and ack state
|
||||
#static.ARQ_FRAME_ACK_RECEIVED = False
|
||||
#static.ARQ_ACK_RECEIVED = False
|
||||
#static.ARQ_RX_ACK_TIMEOUT = False
|
||||
|
||||
|
||||
logging.info("ARQ | RX | WAITING FOR BURST ACK")
|
||||
static.ARQ_STATE = 'RECEIVING_SIGNALLING'
|
||||
|
||||
helpers.arq_reset_timeout(False)
|
||||
helpers.arq_reset_ack(False)
|
||||
|
||||
acktimer = threading.Timer(static.ARQ_RX_ACK_TIMEOUT_SECONDS, helpers.arq_ack_timeout)
|
||||
acktimer.start()
|
||||
|
||||
print(".............................")
|
||||
print("static.ARQ_STATE " + str(static.ARQ_STATE))
|
||||
print("static.ARQ_FRAME_ACK_RECEIVED " + str(static.ARQ_FRAME_ACK_RECEIVED))
|
||||
print("static.ARQ_ACK_RECEIVED " + str(static.ARQ_ACK_RECEIVED))
|
||||
print("static.ARQ_RX_ACK_TIMEOUT " + str(static.ARQ_RX_ACK_TIMEOUT))
|
||||
print("static.ARQ_RPT_RECEIVED " + str(static.ARQ_RPT_RECEIVED))
|
||||
print(".............................")
|
||||
|
||||
# --------------------------- WHILE TIMEOUT NOT REACHED AND NO ACK RECEIVED --> LISTEN
|
||||
while static.ARQ_ACK_RECEIVED != True and static.ARQ_RPT_RECEIVED != True and static.ARQ_FRAME_ACK_RECEIVED != True and static.ARQ_RX_FRAME_TIMEOUT != True and static.ARQ_RX_ACK_TIMEOUT != True:
|
||||
time.sleep(0.01) # lets reduce CPU load a little bit
|
||||
print(static.ARQ_STATE)
|
||||
|
||||
if static.ARQ_RPT_RECEIVED == True:
|
||||
|
||||
logging.info("ARQ | RX | REQUEST FOR REPEATING FRAMES: " + str(static.ARQ_RPT_FRAMES))
|
||||
logging.info("ARQ | TX | SENDING REQUESTED FRAMES: " + str(static.ARQ_RPT_FRAMES))
|
||||
|
||||
TRANSMIT_ARQ_BURST_THREAD = threading.Thread(target=modem.transmit_arq_burst, name="TRANSMIT_ARQ_BURST")
|
||||
TRANSMIT_ARQ_BURST_THREAD.start()
|
||||
|
||||
# lets wait during sending. After sending is finished we will continue
|
||||
while static.ARQ_STATE == 'SENDING_DATA':
|
||||
time.sleep(0.01)
|
||||
|
||||
|
||||
static.ARQ_STATE = 'RECEIVING_SIGNALLING'
|
||||
|
||||
helpers.arq_reset_timeout(False)
|
||||
helpers.arq_reset_ack(False)
|
||||
|
||||
rpttimer = threading.Timer(static.ARQ_RX_RPT_TIMEOUT_SECONDS, helpers.arq_rpt_timeout)
|
||||
rpttimer.start()
|
||||
|
||||
while static.ARQ_ACK_RECEIVED == False and static.ARQ_FRAME_ACK_RECEIVED == False and static.ARQ_RX_RPT_TIMEOUT == False:
|
||||
time.sleep(0.01) # lets reduce CPU load a little bit
|
||||
print(static.ARQ_STATE)
|
||||
|
||||
if static.ARQ_ACK_RECEIVED == True:
|
||||
|
||||
logging.info("ARQ | RX | ACK RECEIVED AFTER FRAME REPEAT")
|
||||
|
||||
helpers.arq_reset_ack(True)
|
||||
static.ARQ_RPT_FRAMES = []
|
||||
|
||||
if static.ARQ_RX_RPT_TIMEOUT == True and static.ARQ_ACK_RECEIVED == False:
|
||||
print("Burst lost....")
|
||||
|
||||
helpers.arq_reset_ack(False)
|
||||
static.ARQ_RPT_FRAMES = []
|
||||
|
||||
#--------------------------------------------------------------------------------------------------------------
|
||||
|
||||
elif static.ARQ_ACK_RECEIVED == 0 and static.ARQ_RX_ACK_TIMEOUT == 1:
|
||||
logging.info("ARQ | RX | ACK TIMEOUT - AND NO ACK!")
|
||||
pass #no break here so we can continue with the next try of repeating the burst
|
||||
|
||||
#--------------- BREAK LOOP IF ACK HAS BEEN RECEIVED
|
||||
elif static.ARQ_ACK_RECEIVED == True:
|
||||
logging.info("ARQ | RX | ACK RECEIVED")
|
||||
#-----------IF ACK RECEIVED, INCREMENT ITERATOR FOR MAIN LOOP TO PROCEED WITH NEXT FRAMES/BURST
|
||||
static.ARQ_N_SENT_FRAMES = static.ARQ_N_SENT_FRAMES + static.ARQ_TX_N_FRAMES_PER_BURST
|
||||
break
|
||||
|
||||
#--------------- BREAK LOOP IF FRAME ACK HAS BEEN RECEIVED EARLIER AS EXPECTED
|
||||
elif static.ARQ_FRAME_ACK_RECEIVED == True:
|
||||
print("----------------------------------------------------------")
|
||||
logging.info("ARQ | RX | EARLY FRAME ACK RECEIVED - STOPPING TX")
|
||||
#static.ARQ_N_SENT_FRAMES = #static.TX_BUFFER_SIZE
|
||||
static.ARQ_N_SENT_FRAMES = static.ARQ_N_SENT_FRAMES + static.ARQ_TX_N_FRAMES_PER_BURST
|
||||
break
|
||||
|
||||
else:
|
||||
print("------------------------------->NO RULE MATCHED!")
|
||||
break
|
||||
|
||||
|
||||
#--------------------------------WAITING AREA FOR FRAME ACKs
|
||||
|
||||
print("static.ARQ_N_SENT_FRAMES " + str(static.ARQ_N_SENT_FRAMES))
|
||||
print("static.TX_BUFFER_SIZE " + str(static.TX_BUFFER_SIZE))
|
||||
print("static.TX_N_RETRIES " + str(static.TX_N_RETRIES))
|
||||
print("static.TX_N_MAX_RETRIES " + str(static.TX_N_MAX_RETRIES))
|
||||
|
||||
print("static.ARQ_STATE " + str(static.ARQ_STATE))
|
||||
print("static.ARQ_FRAME_ACK_RECEIVED " + str(static.ARQ_FRAME_ACK_RECEIVED))
|
||||
print("static.ARQ_RX_FRAME_TIMEOUT " + str(static.ARQ_RX_FRAME_TIMEOUT))
|
||||
print("static.ARQ_ACK_RECEIVED " + str(static.ARQ_ACK_RECEIVED))
|
||||
print("static.ARQ_RX_ACK_TIMEOUT " + str(static.ARQ_RX_ACK_TIMEOUT))
|
||||
print("static.ARQ_RPT_RECEIVED " + str(static.ARQ_RPT_RECEIVED))
|
||||
|
||||
|
||||
frametimer = threading.Timer(static.ARQ_RX_FRAME_TIMEOUT_SECONDS, helpers.arq_frame_timeout)
|
||||
frametimer.start()
|
||||
static.ARQ_STATE = 'RECEIVING_SIGNALLING'
|
||||
|
||||
# wait for frame ACK if we processed the last frame/burst
|
||||
while static.ARQ_FRAME_ACK_RECEIVED == False and static.ARQ_RX_FRAME_TIMEOUT == False and static.ARQ_N_SENT_FRAMES == static.TX_BUFFER_SIZE:
|
||||
time.sleep(0.01) # lets reduce CPU load a little bit
|
||||
#print(static.ARQ_STATE)
|
||||
print("WAITING FOR FRAME ACK")
|
||||
|
||||
|
||||
|
||||
# ----------- if no ACK received and out of retries.....stop frame sending
|
||||
if static.ARQ_ACK_RECEIVED == False and static.ARQ_FRAME_ACK_RECEIVED == False and static.ARQ_RX_ACK_TIMEOUT == True:
|
||||
logging.info("ARQ | TX | NO BURST OR FRAME ACK RECEIVED | DATA SHOULD BE RESEND!")
|
||||
break
|
||||
|
||||
#-------------------------BREAK TX BUFFER LOOP IF ALL PACKETS HAVE BEEN SENT AND WE GOT A FRAME ACK
|
||||
elif static.ARQ_N_SENT_FRAMES == static.TX_BUFFER_SIZE and static.ARQ_FRAME_ACK_RECEIVED == True:
|
||||
logging.info("ARQ | RX | REGULAR FRAME ACK RECEIVED - DATA TRANSMITTED!")
|
||||
break
|
||||
|
||||
else:
|
||||
print("NO MATCHING RULE AT THE END")
|
||||
|
||||
|
||||
# IF TX BUFFER IS EMPTY / ALL FRAMES HAVE BEEN SENT --> HERE WE COULD ADD AN static.VAR for IDLE STATE
|
||||
|
||||
logging.info("ARQ | TX | BUFFER EMPTY")
|
||||
helpers.arq_reset_frame_machine()
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
# BURST MACHINE TO DEFINE N BURSTS PER FRAME ---> LATER WE CAN USE CHANNEL MESSUREMENT TO SET FRAMES PER BURST
|
||||
def get_n_frames_per_burst():
|
||||
|
||||
#n_frames_per_burst = randrange(1,10)
|
||||
n_frames_per_burst = 4
|
||||
return n_frames_per_burst
|
||||
|
||||
|
||||
|
||||
def burst_ack_received():
|
||||
|
||||
logging.info("ARQ | RX | BURST ACK RCVD!")
|
||||
#static.ARQ_RX_ACK_TIMEOUT = True #Force timer to stop waiting
|
||||
static.ARQ_ACK_RECEIVED = True #Force data loops of TNC to stop and continue with next frame
|
||||
|
||||
#static.ARQ_RX_RPT_TIMEOUT = True #Force timer to stop waiting
|
||||
#static.ARQ_RPT_RECEIVED = False
|
||||
#static.ARQ_RPT_FRAMES = []
|
||||
|
||||
|
||||
def frame_ack_received():
|
||||
|
||||
logging.info("ARQ | RX | FRAME ACK RCVD!")
|
||||
#static.ARQ_RX_ACK_TIMEOUT = True #Force timer to stop waiting
|
||||
static.ARQ_FRAME_ACK_RECEIVED = True #Force data loops of TNC to stop and continue with next frame
|
||||
|
||||
#static.ARQ_RX_RPT_TIMEOUT = True #Force timer to stop waiting
|
||||
#static.ARQ_RPT_RECEIVED = False
|
||||
#static.ARQ_RPT_FRAMES = []
|
||||
|
||||
|
||||
def burst_rpt_received(data_in):
|
||||
|
||||
logging.info("ARQ | RX | BURST RPT RCVD!")
|
||||
#static.ARQ_RX_ACK_TIMEOUT = False #Force timer to stop waiting
|
||||
#static.ARQ_ACK_RECEIVED = False #Force data loops of TNC to stop and continue with next frame
|
||||
|
||||
#static.ARQ_RX_RPT_TIMEOUT = True
|
||||
static.ARQ_RPT_RECEIVED = True
|
||||
static.ARQ_RPT_FRAMES = []
|
||||
|
||||
missing_area = bytes(data_in[1:9])
|
||||
|
||||
for i in range(0,6,2):
|
||||
if not missing_area[i:i+2].endswith(b'\x00\x00'):
|
||||
missing = missing_area[i:i+2]
|
||||
static.ARQ_RPT_FRAMES.insert(0,missing)
|
||||
|
||||
355
modem.py
Normal file
355
modem.py
Normal file
|
|
@ -0,0 +1,355 @@
|
|||
#!/usr/bin/env python3
|
||||
# -*- coding: utf-8 -*-
|
||||
"""
|
||||
Created on Wed Dec 23 07:04:24 2020
|
||||
|
||||
@author: DJ2LS
|
||||
"""
|
||||
|
||||
import ctypes
|
||||
from ctypes import *
|
||||
import pathlib
|
||||
import pyaudio
|
||||
import sys
|
||||
import logging
|
||||
import time
|
||||
import threading
|
||||
|
||||
import helpers
|
||||
import static
|
||||
import arq
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
class RF():
|
||||
|
||||
def __init__(self):
|
||||
#-------------------------------------------- LOAD FREEDV
|
||||
libname = pathlib.Path().absolute() / "codec2/build_linux/src/libcodec2.so"
|
||||
self.c_lib = ctypes.CDLL(libname)
|
||||
#--------------------------------------------CREATE PYAUDIO INSTANCE
|
||||
self.p = pyaudio.PyAudio()
|
||||
#--------------------------------------------GET SUPPORTED SAMPLE RATES FROM SOUND DEVICE
|
||||
#static.AUDIO_SAMPLE_RATE_RX = int(self.p.get_device_info_by_index(static.AUDIO_INPUT_DEVICE)['defaultSampleRate'])
|
||||
#static.AUDIO_SAMPLE_RATE_TX = int(self.p.get_device_info_by_index(static.AUDIO_OUTPUT_DEVICE)['defaultSampleRate'])
|
||||
static.AUDIO_SAMPLE_RATE_TX = 8000
|
||||
static.AUDIO_SAMPLE_RATE_RX = 8000
|
||||
#--------------------------------------------OPEN AUDIO CHANNEL RX
|
||||
self.stream_rx = self.p.open(format=pyaudio.paInt16,
|
||||
channels=static.AUDIO_CHANNELS,
|
||||
rate=static.AUDIO_SAMPLE_RATE_RX,
|
||||
frames_per_buffer=static.AUDIO_FRAMES_PER_BUFFER,
|
||||
input=True,
|
||||
input_device_index=static.AUDIO_INPUT_DEVICE,
|
||||
)
|
||||
#--------------------------------------------OPEN AUDIO CHANNEL TX
|
||||
self.stream_tx = self.p.open(format=pyaudio.paInt16,
|
||||
channels=1,
|
||||
rate=static.AUDIO_SAMPLE_RATE_TX,
|
||||
frames_per_buffer=static.AUDIO_FRAMES_PER_BUFFER, #n_nom_modem_samples
|
||||
output=True,
|
||||
output_device_index=static.AUDIO_OUTPUT_DEVICE, #static.AUDIO_OUTPUT_DEVICE
|
||||
)
|
||||
#--------------------------------------------START DECODER THREAD
|
||||
FREEDV_DECODER_THREAD = threading.Thread(target=self.receive, args=[static.FREEDV_DATA_MODE,static.FREEDV_SIGNALLING_MODE], name="FREEDV_DECODER_THREAD")
|
||||
FREEDV_DECODER_THREAD.start()
|
||||
|
||||
#--------------------------------------------------------------------------------------------------------
|
||||
def transmit_arq_ack(self,ack_buffer):
|
||||
#print(ack_buffer)
|
||||
static.ARQ_STATE = 'SENDING_ACK'
|
||||
|
||||
self.c_lib.freedv_open.restype = ctypes.POINTER(ctypes.c_ubyte)
|
||||
freedv = self.c_lib.freedv_open(static.FREEDV_SIGNALLING_MODE)
|
||||
bytes_per_frame = int(self.c_lib.freedv_get_bits_per_modem_frame(freedv)/8)
|
||||
payload_per_frame = bytes_per_frame -2
|
||||
n_nom_modem_samples = self.c_lib.freedv_get_n_nom_modem_samples(freedv)
|
||||
n_tx_modem_samples = self.c_lib.freedv_get_n_tx_modem_samples(freedv)*2 #get n_tx_modem_samples which defines the size of the modulation object
|
||||
|
||||
mod_out = ctypes.c_short * n_tx_modem_samples
|
||||
mod_out = mod_out()
|
||||
mod_out_preamble = ctypes.c_short * (1760*2) #1760 for mode 10,11,12 #4000 for mode 9
|
||||
mod_out_preamble = mod_out_preamble()
|
||||
|
||||
buffer = bytearray(payload_per_frame) # use this if CRC16 checksum is required ( DATA1-3)
|
||||
buffer[:len(ack_buffer)] = ack_buffer # set buffersize to length of data which will be send
|
||||
|
||||
crc = ctypes.c_ushort(self.c_lib.freedv_gen_crc16(bytes(buffer), payload_per_frame)) # generate CRC16
|
||||
crc = crc.value.to_bytes(2, byteorder='big') # convert crc to 2 byte hex string
|
||||
buffer += crc # append crc16 to buffer
|
||||
data = (ctypes.c_ubyte * bytes_per_frame).from_buffer_copy(buffer)
|
||||
|
||||
preamble_bytes = self.c_lib.freedv_rawdatapreambletx(freedv, mod_out_preamble)
|
||||
self.c_lib.freedv_rawdatatx(freedv,mod_out,data) # modulate DATA and safe it into mod_out pointer
|
||||
txbuffer = bytearray()
|
||||
txbuffer += bytes(mod_out_preamble)
|
||||
txbuffer = txbuffer.rstrip(b'\x00') #lets remove unallocated memory because of wrong buffer :-/
|
||||
txbuffer += bytes(mod_out)
|
||||
txbuffer = txbuffer.rstrip(b'\x00') #lets remove unallocated memory because of wrong buffer :-/
|
||||
|
||||
# -------------- transmit audio twice
|
||||
|
||||
print("SEND SIGNALLING FRAME...................................")
|
||||
print(ack_buffer)
|
||||
self.stream_tx.write(bytes(txbuffer))
|
||||
print("........................................................")
|
||||
self.stream_tx.write(bytes(txbuffer))
|
||||
|
||||
print("...................................DONE!")
|
||||
|
||||
static.ARQ_STATE = 'RECEIVING_DATA'
|
||||
#--------------------------------------------------------------------------------------------------------
|
||||
# GET ARQ BURST FRAME VOM BUFFER AND MODULATE IT
|
||||
def transmit_arq_burst(self):
|
||||
static.ARQ_STATE = 'SENDING_DATA'
|
||||
|
||||
self.c_lib.freedv_open.restype = ctypes.POINTER(ctypes.c_ubyte)
|
||||
freedv = self.c_lib.freedv_open(static.FREEDV_DATA_MODE)
|
||||
static.FREEDV_DATA_BYTES_PER_FRAME = int(self.c_lib.freedv_get_bits_per_modem_frame(freedv)/8)
|
||||
static.FREEDV_DATA_PAYLOAD_PER_FRAME = static.FREEDV_DATA_BYTES_PER_FRAME -2
|
||||
|
||||
n_nom_modem_samples = self.c_lib.freedv_get_n_nom_modem_samples(freedv)
|
||||
n_tx_modem_samples = self.c_lib.freedv_get_n_tx_modem_samples(freedv)*2 #get n_tx_modem_samples which defines the size of the modulation object
|
||||
|
||||
mod_out = ctypes.c_short * n_tx_modem_samples
|
||||
mod_out = mod_out()
|
||||
mod_out_preamble = ctypes.c_short * (n_tx_modem_samples*2) #1760 for mode 10,11,12 #4000 for mode 9
|
||||
mod_out_preamble = mod_out_preamble()
|
||||
|
||||
self.c_lib.freedv_rawdatapreambletx(freedv, mod_out_preamble);
|
||||
txbuffer = bytearray()
|
||||
txbuffer += bytes(mod_out_preamble)
|
||||
txbuffer = txbuffer.rstrip(b'\x00') #lets remove unallocated memory because of wrong buffer :-/
|
||||
|
||||
if static.ARQ_RPT_RECEIVED == False:
|
||||
for n in range(0,static.ARQ_TX_N_FRAMES_PER_BURST):
|
||||
|
||||
#---------------------------BUILD ARQ BURST ---------------------------------------------------------------------
|
||||
frame_type = 10 + n + 1 #static.ARQ_TX_N_FRAMES_PER_BURST
|
||||
frame_type = bytes([frame_type])
|
||||
|
||||
payload_data = bytes(static.TX_BUFFER[static.ARQ_N_SENT_FRAMES + n])
|
||||
|
||||
n_current_arq_frame = static.ARQ_N_SENT_FRAMES + n + 1
|
||||
static.ARQ_TX_N_CURRENT_ARQ_FRAME = n_current_arq_frame.to_bytes(2, byteorder='big')
|
||||
|
||||
n_total_arq_frame = len(static.TX_BUFFER)
|
||||
static.ARQ_TX_N_TOTAL_ARQ_FRAMES = n_total_arq_frame.to_bytes(2, byteorder='big')
|
||||
|
||||
arqframe = frame_type + \
|
||||
bytes([static.ARQ_TX_N_FRAMES_PER_BURST]) + \
|
||||
static.ARQ_TX_N_CURRENT_ARQ_FRAME + \
|
||||
static.ARQ_TX_N_TOTAL_ARQ_FRAMES + \
|
||||
static.DXCALLSIGN_CRC8 + \
|
||||
static.MYCALLSIGN_CRC8 + \
|
||||
payload_data
|
||||
|
||||
#print(arqframe)
|
||||
|
||||
buffer = bytearray(static.FREEDV_DATA_PAYLOAD_PER_FRAME) # create TX buffer
|
||||
buffer[:len(arqframe)] = arqframe # set buffersize to length of data which will be send
|
||||
|
||||
crc = ctypes.c_ushort(self.c_lib.freedv_gen_crc16(bytes(buffer), static.FREEDV_DATA_PAYLOAD_PER_FRAME)) # generate CRC16
|
||||
crc = crc.value.to_bytes(2, byteorder='big') # convert crc to 2 byte hex string
|
||||
buffer += crc # append crc16 to buffer
|
||||
|
||||
data = (ctypes.c_ubyte * static.FREEDV_DATA_BYTES_PER_FRAME).from_buffer_copy(buffer)
|
||||
self.c_lib.freedv_rawdatatx(freedv,mod_out,data) # modulate DATA and safe it into mod_out pointer
|
||||
txbuffer += bytes(mod_out)
|
||||
txbuffer = txbuffer.rstrip(b'\x00') #lets remove unallocated memory because of wrong buffer :-/
|
||||
|
||||
elif static.ARQ_RPT_RECEIVED == True:
|
||||
|
||||
for n in range(0,len(static.ARQ_RPT_FRAMES)):
|
||||
|
||||
missing_frame = int.from_bytes(static.ARQ_RPT_FRAMES[n], "big")
|
||||
|
||||
#---------------------------BUILD ARQ BURST ---------------------------------------------------------------------
|
||||
frame_type = 10 + missing_frame #static.ARQ_TX_N_FRAMES_PER_BURST
|
||||
frame_type = bytes([frame_type])
|
||||
|
||||
payload_data = bytes(static.TX_BUFFER[static.ARQ_N_SENT_FRAMES + missing_frame - 1])
|
||||
|
||||
n_current_arq_frame = static.ARQ_N_SENT_FRAMES + missing_frame
|
||||
static.ARQ_TX_N_CURRENT_ARQ_FRAME = n_current_arq_frame.to_bytes(2, byteorder='big')
|
||||
|
||||
n_total_arq_frame = len(static.TX_BUFFER)
|
||||
static.ARQ_TX_N_TOTAL_ARQ_FRAMES = n_total_arq_frame.to_bytes(2, byteorder='big')
|
||||
|
||||
arqframe = frame_type + \
|
||||
bytes([static.ARQ_TX_N_FRAMES_PER_BURST]) + \
|
||||
static.ARQ_TX_N_CURRENT_ARQ_FRAME + \
|
||||
static.ARQ_TX_N_TOTAL_ARQ_FRAMES + \
|
||||
static.DXCALLSIGN_CRC8 + \
|
||||
static.MYCALLSIGN_CRC8 + \
|
||||
payload_data
|
||||
|
||||
buffer = bytearray(static.FREEDV_DATA_PAYLOAD_PER_FRAME) # create TX buffer
|
||||
buffer[:len(arqframe)] = arqframe # set buffersize to length of data which will be send
|
||||
|
||||
crc = ctypes.c_ushort(self.c_lib.freedv_gen_crc16(bytes(buffer), static.FREEDV_DATA_PAYLOAD_PER_FRAME)) # generate CRC16
|
||||
crc = crc.value.to_bytes(2, byteorder='big') # convert crc to 2 byte hex string
|
||||
buffer += crc # append crc16 to buffer
|
||||
|
||||
data = (ctypes.c_ubyte * static.FREEDV_DATA_BYTES_PER_FRAME).from_buffer_copy(buffer)
|
||||
self.c_lib.freedv_rawdatatx(freedv,mod_out,data) # modulate DATA and safe it into mod_out pointer
|
||||
txbuffer += bytes(mod_out)
|
||||
txbuffer = txbuffer.rstrip(b'\x00') #lets remove unallocated memory because of wrong buffer :-/
|
||||
|
||||
|
||||
# -------------- transmit audio
|
||||
self.stream_tx.write(bytes(txbuffer))
|
||||
#time.sleep(0.5)
|
||||
static.ARQ_STATE = 'IDLE'
|
||||
#static.ARQ_STATE = 'RECEIVING_SIGNALLING'
|
||||
|
||||
#--------------------------------------------------------------------------------------------------------
|
||||
def receive(self,data_mode,signalling_mode):
|
||||
force = False
|
||||
|
||||
self.c_lib.freedv_open.restype = ctypes.POINTER(ctypes.c_ubyte)
|
||||
|
||||
freedv_data = self.c_lib.freedv_open(data_mode)
|
||||
freedv_signalling = self.c_lib.freedv_open(signalling_mode)
|
||||
|
||||
static.FREEDV_DATA_BYTES_PER_FRAME = int(self.c_lib.freedv_get_bits_per_modem_frame(freedv_data)/8)
|
||||
static.FREEDV_DATA_PAYLOAD_PER_FRAME = static.FREEDV_DATA_BYTES_PER_FRAME -2
|
||||
static.FREEDV_SIGNALLING_BYTES_PER_FRAME = int(self.c_lib.freedv_get_bits_per_modem_frame(freedv_signalling)/8)
|
||||
static.FREEDV_SIGNALLING_PAYLOAD_PER_FRAME = static.FREEDV_SIGNALLING_BYTES_PER_FRAME -2
|
||||
|
||||
data_bytes_out = (ctypes.c_ubyte * static.FREEDV_DATA_BYTES_PER_FRAME)
|
||||
data_bytes_out = data_bytes_out() #get pointer from bytes_out
|
||||
|
||||
signalling_bytes_out = (ctypes.c_ubyte * static.FREEDV_SIGNALLING_BYTES_PER_FRAME)
|
||||
signalling_bytes_out = signalling_bytes_out() #get pointer from bytes_out
|
||||
|
||||
# with this we can interrupt receiving
|
||||
while static.FREEDV_RECEIVE == True:
|
||||
time.sleep(0.01)
|
||||
|
||||
# stuck in sync counter
|
||||
stuck_in_sync_counter = 0
|
||||
stuck_in_sync_10_counter = 0
|
||||
#
|
||||
|
||||
while static.ARQ_STATE == 'RECEIVING_DATA':
|
||||
time.sleep(0.01)
|
||||
|
||||
nin = self.c_lib.freedv_nin(freedv_data)
|
||||
nin = int(nin*(static.AUDIO_SAMPLE_RATE_RX/static.MODEM_SAMPLE_RATE))
|
||||
|
||||
data_in = self.stream_rx.read(nin, exception_on_overflow = False)
|
||||
data_in = data_in.rstrip(b'\x00')
|
||||
|
||||
#print(data_in)
|
||||
|
||||
self.c_lib.freedv_rawdatarx.argtype = [ctypes.POINTER(ctypes.c_ubyte), data_bytes_out, data_in] # check if really neccessary
|
||||
nbytes = self.c_lib.freedv_rawdatarx(freedv_data, data_bytes_out, data_in) # demodulate audio
|
||||
print(self.c_lib.freedv_get_rx_status(freedv_data))
|
||||
|
||||
|
||||
#-------------STUCK IN SYNC DETECTOR
|
||||
stuck_in_sync_counter += 1
|
||||
if self.c_lib.freedv_get_rx_status(freedv_data) == 10:
|
||||
stuck_in_sync_10_counter += 1
|
||||
|
||||
|
||||
#print(stuck_in_sync_counter)
|
||||
#if stuck_in_sync_counter == 33 and self.c_lib.freedv_get_rx_status(freedv_data) == 10:
|
||||
# print("stuck in sync #1 --> DOING UNSYNC")
|
||||
# self.c_lib.freedv_set_sync(freedv_data, 0) #FORCE UNSYNC
|
||||
# stuck_in_sync_counter = 0
|
||||
# stuck_in_sync_10_counter = 0
|
||||
# data_in = None
|
||||
|
||||
|
||||
if stuck_in_sync_counter >= 66 and stuck_in_sync_10_counter >= 2:
|
||||
logging.warning("modem stuck in sync")
|
||||
self.c_lib.freedv_set_sync(freedv_data, 0) #FORCE UNSYNC
|
||||
stuck_in_sync_counter = 0
|
||||
stuck_in_sync_10_counter = 0
|
||||
data_in = None
|
||||
#-----------------------------------
|
||||
|
||||
|
||||
if nbytes == static.FREEDV_DATA_BYTES_PER_FRAME:
|
||||
|
||||
# counter reset for stuck in sync counter
|
||||
stuck_in_sync_counter = 0
|
||||
stuck_in_sync_10_counter = 0
|
||||
#
|
||||
|
||||
# CHECK IF FRAMETYPE IS BETWEEN 10 and 50 ------------------------
|
||||
frametype = int.from_bytes(bytes(data_bytes_out[:1]), "big")
|
||||
frame = frametype - 10
|
||||
n_frames_per_burst = int.from_bytes(bytes(data_bytes_out[1:2]), "big")
|
||||
|
||||
if 50 >= frametype >= 10:
|
||||
if frame != 3 or force == True:
|
||||
arq.data_received(bytes(data_bytes_out[:-2])) #send payload data to arq checker without CRC16
|
||||
|
||||
#print("static.ARQ_RX_BURST_BUFFER.count(None) " + str(static.ARQ_RX_BURST_BUFFER.count(None)))
|
||||
if static.ARQ_RX_BURST_BUFFER.count(None) <= 1:
|
||||
print("FULL BURST BUFFER ---> UNSYNC")
|
||||
self.c_lib.freedv_set_sync(freedv_data, 0)
|
||||
|
||||
else:
|
||||
print("---------------------------SIMULATED MISSING FRAME")
|
||||
force = True
|
||||
else:
|
||||
print("MODE: " + str(data_mode) + " DATA: " + str(bytes(data_bytes_out)))
|
||||
|
||||
|
||||
# DO UNSYNC AFTER LAST BURST by checking the frame numbers agains the total frames per burst
|
||||
if frame == n_frames_per_burst:
|
||||
print("LAST FRAME ---> UNSYNC")
|
||||
self.c_lib.freedv_set_sync(freedv_data, 0) #FORCE UNSYNC
|
||||
|
||||
|
||||
|
||||
while static.ARQ_STATE == 'IDLE' or static.ARQ_STATE == 'RECEIVING_SIGNALLING':
|
||||
time.sleep(0.01)
|
||||
|
||||
nin = self.c_lib.freedv_nin(freedv_signalling)
|
||||
nin = int(nin*(static.AUDIO_SAMPLE_RATE_RX/static.MODEM_SAMPLE_RATE))
|
||||
|
||||
data_in = self.stream_rx.read(nin, exception_on_overflow = False)
|
||||
data_in = data_in.rstrip(b'\x00')
|
||||
|
||||
self.c_lib.freedv_rawdatarx.argtype = [ctypes.POINTER(ctypes.c_ubyte), signalling_bytes_out, data_in] # check if really neccessary
|
||||
nbytes = self.c_lib.freedv_rawdatarx(freedv_signalling, signalling_bytes_out, data_in) # demodulate audio
|
||||
|
||||
# CHECK IF FRAME CONTAINS ACK------------------------
|
||||
|
||||
if nbytes == static.FREEDV_SIGNALLING_BYTES_PER_FRAME:
|
||||
self.c_lib.freedv_set_sync(freedv_signalling, 0)
|
||||
frametype = int.from_bytes(bytes(signalling_bytes_out[:1]), "big")
|
||||
|
||||
# BURST ACK
|
||||
if frametype == 60:
|
||||
print("ACK RECEIVED....")
|
||||
arq.burst_ack_received()
|
||||
|
||||
# FRAME ACK
|
||||
elif frametype == 61:
|
||||
print("FRAME ACK RECEIVED....")
|
||||
arq.frame_ack_received()
|
||||
|
||||
# FRAME RPT
|
||||
elif frametype == 62:
|
||||
print("REPEAT REQUEST RECEIVED....")
|
||||
arq.burst_rpt_received(signalling_bytes_out[:-2])
|
||||
|
||||
else:
|
||||
print("OTHER FRAME: " + str(signalling_bytes_out[:-2]))
|
||||
|
||||
|
||||
rxstatus = self.c_lib.freedv_get_rx_status(freedv_signalling)
|
||||
print("ACK-" + str(rxstatus))
|
||||
#print(rxstatus)
|
||||
if nbytes == static.FREEDV_SIGNALLING_BYTES_PER_FRAME or rxstatus == 10:
|
||||
self.c_lib.freedv_set_sync(freedv_signalling, 0) #FORCE UNSYNC
|
||||
|
||||
128
static.py
Normal file
128
static.py
Normal file
|
|
@ -0,0 +1,128 @@
|
|||
#!/usr/bin/env python3
|
||||
# -*- coding: utf-8 -*-
|
||||
"""
|
||||
Created on Wed Dec 23 11:13:57 2020
|
||||
|
||||
@author: DJ2LS
|
||||
"""
|
||||
# ADDITION MESSUREMENT:
|
||||
#AUDIO TIME: 7.451462268829346 #12 # 1 FRAME + PREAMBLE
|
||||
#MODULATION TIME: 0.002051115036010742 #12 # 1 FRAME + PREAMBLE
|
||||
|
||||
#MODULATION TIME: 0.004580974578857422 #12 # 2 FRAME + PREAMBLE
|
||||
#AUDIO TIME: 14.750595331192017 #12 # 2 FRAME + PREAMBLE
|
||||
|
||||
|
||||
MYCALLSIGN = b''
|
||||
MYCALLSIGN_CRC8 = b''
|
||||
|
||||
DXCALLSIGN = b''
|
||||
DXCALLSIGN_CRC8 = b''
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
# FreeDV Defaults
|
||||
FREEDV_RECEIVE = True
|
||||
|
||||
FREEDV_DATA_MODE = 10
|
||||
FREEDV_SIGNALLING_MODE = 14
|
||||
|
||||
FREEDV_DATA_BYTES_PER_FRAME = 0
|
||||
FREEDV_DATA_PAYLOAD_PER_FRAME = 0
|
||||
FREEDV_SIGNALLING_BYTES_PER_FRAME = 0
|
||||
FREEDV_SIGNALLING_PAYLOAD_PER_FRAME = 0
|
||||
|
||||
# Server Defaults
|
||||
HOST = "localhost"
|
||||
PORT = 3000
|
||||
|
||||
|
||||
#AUdio Defaults
|
||||
AUDIO_INPUT_DEVICE = 1
|
||||
AUDIO_OUTPUT_DEVICE = 1
|
||||
#TX_SAMPLE_STATE = None
|
||||
#RX_SAMPLE_STATE = None
|
||||
|
||||
#AUDIO_SAMPLE_RATE_RX = 44100
|
||||
#AUDIO_SAMPLE_RATE_TX = 44100
|
||||
MODEM_SAMPLE_RATE = 8000 #8000
|
||||
AUDIO_FRAMES_PER_BUFFER = 2048
|
||||
AUDIO_CHANNELS = 1
|
||||
|
||||
|
||||
#TNC DEFAULTS
|
||||
# ARQ
|
||||
TX_N_MAX_RETRIES = 3
|
||||
TX_N_RETRIES = 0
|
||||
|
||||
|
||||
|
||||
ARQ_TX_N_FRAMES_PER_BURST = 0
|
||||
ARQ_TX_N_BURSTS = 0
|
||||
|
||||
ARQ_PAYLOAD_PER_FRAME = 0
|
||||
ARQ_ACK_WAITING_FOR_ID = 0
|
||||
ARQ_RX_BURST_BUFFER = []
|
||||
ARQ_RX_FRAME_BUFFER = []
|
||||
ARQ_RX_FRAME_N_BURSTS = 0
|
||||
|
||||
## TX
|
||||
ARQ_TX_N_CURRENT_ARQ_FRAME = 0
|
||||
ARQ_TX_N_TOTAL_ARQ_FRAMES = 0
|
||||
##
|
||||
|
||||
## RX
|
||||
ARQ_N_ARQ_FRAMES_PER_DATA_FRAME = 0 #total number of arq frames per data frame
|
||||
ARQ_RX_N_CURRENT_ARQ_FRAME = 0
|
||||
##
|
||||
|
||||
ARQ_N_RX_ARQ_FRAMES = 0 # total number of received frames
|
||||
|
||||
ARQ_N_RX_FRAMES_PER_BURSTS = 0 # NUMBER OF FRAMES WE ARE WAITING FOR --> GOT DATA FROM RECEIVED FRAME
|
||||
ARQ_ACK_PAYLOAD_PER_FRAME = 0 # PAYLOAD per ACK frame
|
||||
|
||||
ARQ_ACK_RECEIVED = False # set to 1 if ACK received
|
||||
ARQ_RX_ACK_TIMEOUT = False # set to 1 if timeut reached
|
||||
ARQ_RX_ACK_TIMEOUT_SECONDS = 4.0 #timeout for waiting for ACK frames
|
||||
|
||||
|
||||
ARQ_FRAME_ACK_RECEIVED = False # set to 1 if FRAME ACK received
|
||||
ARQ_RX_FRAME_TIMEOUT = False
|
||||
ARQ_RX_FRAME_TIMEOUT_SECONDS = 4.0
|
||||
|
||||
|
||||
ARQ_RX_RPT_TIMEOUT = False
|
||||
ARQ_RX_RPT_TIMEOUT_SECONDS = 4.0
|
||||
ARQ_RPT_RECEIVED = False #indicate if RPT frame has been received
|
||||
ARQ_RPT_FRAMES = [] #buffer for frames which are requested to repeat
|
||||
|
||||
FRAME_CRC = b''
|
||||
FRAME_BOF = b'\xAA\xAA' #here we define 2 bytes for the BOF
|
||||
FRAME_EOF = b'\xFF\xFF' #here we define 2 bytes for the EOF
|
||||
ARQ_FRAME_BOF_RECEIVED = False # status, if we received a BOF of a data frame
|
||||
ARQ_FRAME_EOF_RECEIVED = False # status, if we received a EOF of a data frame
|
||||
|
||||
ARQ_N_SENT_FRAMES = 0 #counter for already sent frames
|
||||
|
||||
|
||||
# ARQ STATES:
|
||||
# IDLE
|
||||
# RECEIVING_DATA
|
||||
# SENDING_DATA
|
||||
# RECEIVING_SIGNALLING
|
||||
# SENDING_ACK
|
||||
# ACK_RECEIVED
|
||||
#
|
||||
#
|
||||
#
|
||||
ARQ_STATE = 'RECEIVING_DATA'
|
||||
|
||||
# ------- TX BUFFER
|
||||
TX_BUFFER_SIZE = 0
|
||||
TX_BUFFER = []
|
||||
# ------- RX BUFFER
|
||||
RX_BUFFER = []
|
||||
RX_BUFFER_SIZE = 0
|
||||
|
||||
Loading…
Reference in a new issue