sp5wwp

#!/bin/sh
airport=$1	#ICAO airport code
callsign=$2	#repeater/beacon callsign

#Example usage:
#./this.sh EPMO SR5MS
#Set correct sound device in line 43!

curl -s "https://www.aviationweather.gov/metar/data?ids="{$airport}"&format=decoded&date=&hours=0" > metar

sp5wwp

//----------------------funcs----------------------
//write 8-bit register at "long", 16-bit address
void AX5043_WriteRegister16(uint16_t addr, uint8_t val)
{
    addr |= 0xF000;    //MSB set to 1 for writing, 3 further bits has to be set to 1

    uint8_t msg[3]={addr>>8, addr&0xFF, val};

    HAL_GPIO_WritePin(SPI_CS_GPIO_Port, SPI_CS_Pin, 0);
    HAL_SPI_Transmit(&hspi1, msg, 3, 100);

sp5wwp

%-----------------------------------------------------------------------%
% Scalar Quantizer codebook generator for Codec 2
%
% Wojciech Kaczmarski, SP5WWP
% M17 Project, 28/01/2022
%-----------------------------------------------------------------------%

%consts
SPF=160; % 20ms frame at 8kHz = 160 samples per frame

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%---------------------------------------------------------------------------
% This script:
% * loads wave file with the speech corpus
% * extracts LPC coefficients for every 20 ms frame (with 10 ms overlap)
% * converts LPCs to LSFs and builds a training codebook: Nx10 matrix of floats
% * calculates coarse codebook plus additional fine codebooks for split MSVQ
% * dumps codebook data to a text file (codebooks.txt)
%
% In case of convergence error - re-run the script.
%

sp5wwp

%Clear all previous variables etc.
clear; clc;

%The excess bandwidth for our reference square root raised cosine filter is
%set to alpha (a), number of taps is _span*sps+1_
%We set the gain of this filter to 1.0 at the passband
%Next, we calculate raised cosine filter based on our reference taps
%and compute the RMS ISI value
global a;
global span;

sp5wwp

"""
Embedded Python Blocks:

Each time this file is saved, GRC will instantiate the first class it finds
to get ports and parameters of your block. The arguments to __init__  will
be the parameters. All of them are required to have default values!
"""

import numpy as np
from gnuradio import gr

sp5wwp

#!/bin/bash

#----MD380 & Module17----
git clone --recursive https://github.com/OpenRTX/OpenRTX.git

cd OpenRTX

#----meson setup, common for both----
meson setup --cross-file cross_arm.txt build_arm

sp5wwp

clear; clc;

G1=23;         %G_1 polynomial in octal notation
G2=35;         %G_2 -//-
K=5;           %convolutional encoder constraint length
symbols=10000; %test message length in symbols
depth=11;      %bit resolution of the soft decoder
head=20;       %run-up for the root-nyquist filter in symbols
span=8;        %rnyq filter span
sps=10;        %samples per symbol

sp5wwp

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% root-Nyquist (M) filter design                        %
% Source:                                               %
% https://my.ece.utah.edu/~farhang/Nyquist_M_r1.pdf     %
% Edited by Wojciech SP5WWP to work with rcosdesign()   %
%                                                       %
% parameters:                                           %
% N: filter order (filter length = N+1)                 %
% M: number of samples per symbol period                %
% alpha: rolloff factor (range 0 to 1)                  %

sp5wwp

/*
 * M17 baseband interpolator
 *
 * Wojciech Kaczmarski SP5WWP
 * M17 Project, Nov 2022
 */

#include <stdio.h>
#include <stdint.h>
#include <unistd.h>