From 6e0814e0a9db1393aafc1d4167036290783625c7 Mon Sep 17 00:00:00 2001 From: DJ2LS <75909252+DJ2LS@users.noreply.github.com> Date: Sat, 12 Dec 2020 20:18:48 +0100 Subject: [PATCH 01/11] Update README.md --- README.md | 40 +++++++++++++++++++++++++++++++++++++++- 1 file changed, 39 insertions(+), 1 deletion(-) diff --git a/README.md b/README.md index 336f9203..f474dd20 100644 --- a/README.md +++ b/README.md @@ -1 +1,39 @@ -# FreeDV-Socket-TNC \ No newline at end of file +# FreeDV-Socket-TNC +My first attempt to learn more about FreeDV and how to create a TNC which gets data from a TCP/IP Socket. + +## Setup +``` +sudo apt install portaudio19-dev +``` + + +## Run +``` +./__main__.py --rx-sound-device 2 --tx-sound-device 2 --port 3000 +``` + +## Parameters +--rx-sound-device <1> +--tx-sound-device <1> +--port <3000> + +To list all audio devices run +``` +./__main__.py --list-audio-devices +``` + + +## Socket Commands + +BC: Send a simple broadcast + + + + +## Credits + +David Rowe and the FreeDV team for developing the modem and libraries +FreeDV Codec 2 : https://github.com/drowe67/codec2 + + +This software has been heavily inspired by https://github.com/xssfox/freedv-tnc/ From 82f2d8e8755cc31e112a803199d38d75792e1f93 Mon Sep 17 00:00:00 2001 From: DJ2LS <75909252+DJ2LS@users.noreply.github.com> Date: Sun, 13 Dec 2020 17:20:58 +0100 Subject: [PATCH 02/11] Update README.md --- README.md | 1 + 1 file changed, 1 insertion(+) diff --git a/README.md b/README.md index f474dd20..d739f647 100644 --- a/README.md +++ b/README.md @@ -4,6 +4,7 @@ My first attempt to learn more about FreeDV and how to create a TNC which gets d ## Setup ``` sudo apt install portaudio19-dev +pip3 install crcengine ``` From ea3cc9d9d985bcd8c2350a9a8af31fef589a81d2 Mon Sep 17 00:00:00 2001 From: DJ2LS <75909252+DJ2LS@users.noreply.github.com> Date: Tue, 22 Dec 2020 22:05:34 +0100 Subject: [PATCH 03/11] Update README.md --- README.md | 33 +-------------------------------- 1 file changed, 1 insertion(+), 32 deletions(-) diff --git a/README.md b/README.md index d739f647..bc20e873 100644 --- a/README.md +++ b/README.md @@ -1,36 +1,5 @@ # FreeDV-Socket-TNC -My first attempt to learn more about FreeDV and how to create a TNC which gets data from a TCP/IP Socket. - -## Setup -``` -sudo apt install portaudio19-dev -pip3 install crcengine -``` - - -## Run -``` -./__main__.py --rx-sound-device 2 --tx-sound-device 2 --port 3000 -``` - -## Parameters ---rx-sound-device <1> ---tx-sound-device <1> ---port <3000> - -To list all audio devices run -``` -./__main__.py --list-audio-devices -``` - - -## Socket Commands - -BC: Send a simple broadcast - - - - +My first attempt to learn more about FreeDV and how to create a TNC which gets data from a TCP/IP ## Credits David Rowe and the FreeDV team for developing the modem and libraries From 286ce2fc2a34f05474c876eca4ccc8c8e7da78db Mon Sep 17 00:00:00 2001 From: DJ2LS <75909252+DJ2LS@users.noreply.github.com> Date: Tue, 22 Dec 2020 22:06:32 +0100 Subject: [PATCH 04/11] Update README.md --- README.md | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/README.md b/README.md index bc20e873..85df4770 100644 --- a/README.md +++ b/README.md @@ -1,5 +1,6 @@ # FreeDV-Socket-TNC -My first attempt to learn more about FreeDV and how to create a TNC which gets data from a TCP/IP +My first attempt to learn more about FreeDV and how to create a TNC which gets data from a TCP/IP socket + ## Credits David Rowe and the FreeDV team for developing the modem and libraries From 8f23bd12950332aaa9b871c7548455958fcaa6df Mon Sep 17 00:00:00 2001 From: DJ2LS <75909252+DJ2LS@users.noreply.github.com> Date: Fri, 15 Jan 2021 08:56:07 +0100 Subject: [PATCH 05/11] Changed project name --- README.md | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/README.md b/README.md index 85df4770..5beef0a2 100644 --- a/README.md +++ b/README.md @@ -1,5 +1,6 @@ -# FreeDV-Socket-TNC -My first attempt to learn more about FreeDV and how to create a TNC which gets data from a TCP/IP socket +# FreeDV-JATE +##FreeDV- Just Another TNC Experiment +###My first attempt to learn more about FreeDV and how to create a TNC which gets data from a TCP/IP socket ## Credits From c665a40c9e753d48b6edc6d8b7307b7fb10e02e8 Mon Sep 17 00:00:00 2001 From: DJ2LS <75909252+DJ2LS@users.noreply.github.com> Date: Fri, 15 Jan 2021 08:56:24 +0100 Subject: [PATCH 06/11] Changed project name --- README.md | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/README.md b/README.md index 5beef0a2..44f97e7f 100644 --- a/README.md +++ b/README.md @@ -1,6 +1,6 @@ # FreeDV-JATE -##FreeDV- Just Another TNC Experiment -###My first attempt to learn more about FreeDV and how to create a TNC which gets data from a TCP/IP socket +## FreeDV- Just Another TNC Experiment +### My first attempt to learn more about FreeDV and how to create a TNC which gets data from a TCP/IP socket ## Credits From e32f6b3c3f13a5a6848492990bd1ffdb791306b6 Mon Sep 17 00:00:00 2001 From: DJ2LS <75909252+DJ2LS@users.noreply.github.com> Date: Fri, 15 Jan 2021 08:56:54 +0100 Subject: [PATCH 07/11] Update README.md --- README.md | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/README.md b/README.md index 44f97e7f..df6f3fa0 100644 --- a/README.md +++ b/README.md @@ -1,6 +1,7 @@ # FreeDV-JATE -## FreeDV- Just Another TNC Experiment -### My first attempt to learn more about FreeDV and how to create a TNC which gets data from a TCP/IP socket +## Just Another TNC Experiment + +My first attempt to learn more about FreeDV and how to create a TNC which gets data from a TCP/IP socket ## Credits From c709f8b60440d9d8e6637bf1080c6ed89260297f Mon Sep 17 00:00:00 2001 From: DJ2LS <75909252+DJ2LS@users.noreply.github.com> Date: Wed, 10 Feb 2021 15:05:21 +0100 Subject: [PATCH 08/11] improved states --- arq.py | 460 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ modem.py | 355 +++++++++++++++++++++++++++++++++++++++++ static.py | 128 +++++++++++++++ 3 files changed, 943 insertions(+) create mode 100644 arq.py create mode 100644 modem.py create mode 100644 static.py diff --git a/arq.py b/arq.py new file mode 100644 index 00000000..ef60befd --- /dev/null +++ b/arq.py @@ -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) + diff --git a/modem.py b/modem.py new file mode 100644 index 00000000..71191378 --- /dev/null +++ b/modem.py @@ -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 + diff --git a/static.py b/static.py new file mode 100644 index 00000000..0eb4d840 --- /dev/null +++ b/static.py @@ -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 + From d81d1e49e5f8bebca85f4e7c63afbff6c1e5db9b Mon Sep 17 00:00:00 2001 From: DJ2LS <75909252+DJ2LS@users.noreply.github.com> Date: Wed, 10 Feb 2021 15:05:35 +0100 Subject: [PATCH 09/11] Delete arq.py --- arq.py | 460 --------------------------------------------------------- 1 file changed, 460 deletions(-) delete mode 100644 arq.py diff --git a/arq.py b/arq.py deleted file mode 100644 index ef60befd..00000000 --- a/arq.py +++ /dev/null @@ -1,460 +0,0 @@ -#!/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) - From 6ad66452c72175a08343f311a25a2b1bfcb77229 Mon Sep 17 00:00:00 2001 From: DJ2LS <75909252+DJ2LS@users.noreply.github.com> Date: Wed, 10 Feb 2021 15:05:41 +0100 Subject: [PATCH 10/11] Delete modem.py --- modem.py | 355 ------------------------------------------------------- 1 file changed, 355 deletions(-) delete mode 100644 modem.py diff --git a/modem.py b/modem.py deleted file mode 100644 index 71191378..00000000 --- a/modem.py +++ /dev/null @@ -1,355 +0,0 @@ -#!/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 - From 75027330d09a5921c8188ad1887867e540110866 Mon Sep 17 00:00:00 2001 From: DJ2LS <75909252+DJ2LS@users.noreply.github.com> Date: Wed, 10 Feb 2021 15:05:47 +0100 Subject: [PATCH 11/11] Delete static.py --- static.py | 128 ------------------------------------------------------ 1 file changed, 128 deletions(-) delete mode 100644 static.py diff --git a/static.py b/static.py deleted file mode 100644 index 0eb4d840..00000000 --- a/static.py +++ /dev/null @@ -1,128 +0,0 @@ -#!/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 -