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https://git.vladimir.cc/vladimir/ewsdr.git
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109 lines
3.4 KiB
ObjectPascal
109 lines
3.4 KiB
ObjectPascal
{
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Copyright (C)
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2026 - Uladzimir Karpenka, EW8BAK
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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}
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unit FMRepeater;
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{ FM repeater offset helpers — constants, default offsets, auto-direction logic. }
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{$mode objfpc}{$H+}
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interface
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const
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RPT_NONE = 0;
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RPT_MINUS = 1;
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RPT_PLUS = 2;
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RPT_2M_BEGIN = 144000000.0;
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RPT_2M_END = 148000000.0;
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RPT_70CM_BEGIN = 430000000.0;
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RPT_70CM_END = 440000000.0;
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RPT_DEFAULT_2M = 600000.0; // 0.600 MHz
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RPT_DEFAULT_70CM = 7600000.0; // 7.600 MHz
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// European 2m repeater input segment: auto-enable minus direction
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RPT_AUTO_MINUS_LO = 145600000.0; // 145.600 MHz
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RPT_AUTO_MINUS_HI = 145787500.0; // 145.7875 MHz
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// CTCSS tones (38 standard tones). Здесь (а не в MainForm), чтобы таблица
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// была доступна TRadioController для FDSPEngine.SetTXCTCSS. Имена тонов
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// (CTCSS_NAMES) остаются в MainForm — это UI-метки выпадающего списка.
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CTCSS_COUNT = 38;
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CTCSS_TONES: array[0..CTCSS_COUNT-1] of Double = (
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67.0, 71.9, 74.4, 77.0, 79.7, 82.5, 85.4, 88.5, 91.5, 94.8,
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97.4, 100.0, 103.5, 107.2, 110.9, 114.8, 118.8, 123.0, 127.3, 131.8,
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136.5, 141.3, 146.2, 151.4, 156.7, 162.2, 167.9, 173.8, 179.9, 186.2,
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192.8, 203.5, 210.7, 218.1, 225.7, 233.6, 241.8, 250.3);
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{ Returns default offset (Hz) for the given visible frequency.
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70 cm band → 7.600 MHz; everything else → 0.600 MHz. }
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function RptDefaultOffsetHz(FreqHz: Double): Double;
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{ Returns RPT_MINUS when FreqHz falls in the 2 m auto-minus segment,
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RPT_NONE otherwise. }
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function RptAutoDir(FreqHz: Double): Integer;
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{ Formats OffsetHz as MHz with 3 decimal places, e.g. "0.600". }
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function RptFormatOffset(OffsetHz: Double): string;
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{ Parses a MHz string ("0.600", "7.6", "7,600") to Hz.
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Returns 0 on parse error or out-of-range value. }
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function RptParseOffset(const S: string): Double;
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implementation
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uses SysUtils;
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function RptDefaultOffsetHz(FreqHz: Double): Double;
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begin
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if (FreqHz >= RPT_70CM_BEGIN) and (FreqHz <= RPT_70CM_END) then
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Result := RPT_DEFAULT_70CM
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else
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Result := RPT_DEFAULT_2M;
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end;
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function RptAutoDir(FreqHz: Double): Integer;
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begin
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if (FreqHz >= RPT_AUTO_MINUS_LO) and (FreqHz <= RPT_AUTO_MINUS_HI) then
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Result := RPT_MINUS
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else
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Result := RPT_NONE;
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end;
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function RptFormatOffset(OffsetHz: Double): string;
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begin
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Result := Format('%.3f', [OffsetHz / 1000000.0]);
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end;
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function RptParseOffset(const S: string): Double;
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var
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V: Double;
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Code: Integer;
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Norm: string;
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begin
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Norm := StringReplace(Trim(S), ',', '.', [rfReplaceAll]);
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Val(Norm, V, Code);
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if (Code = 0) and (V > 0.0) and (V <= 100.0) then
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Result := V * 1000000.0
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else
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Result := 0.0;
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end;
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end.
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