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73 lines
1.2 KiB
C++
73 lines
1.2 KiB
C++
//
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// FILE: MT8870.cpp
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// AUTHOR: Rob Tillaart
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// VERSION: 0.1.6
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// DATE: 2019-02-11
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// PURPOSE: Arduino library for MT8870 DTMF decoder (breakout)
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// URL: https://github.com/RobTillaart/MT8870
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// https://www.tinytronics.nl/shop/nl/sensoren/geluid/mt8870-dtmf-module
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#include "MT8870.h"
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void MT8870::begin(uint8_t STQ, uint8_t Q1, uint8_t Q2, uint8_t Q3, uint8_t Q4)
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{
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_STQ = STQ;
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_q[0] = Q1;
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_q[1] = Q2;
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_q[2] = Q3;
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_q[3] = Q4;
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for (uint8_t p = 0; p < 4; p++)
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{
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pinMode(_q[p], INPUT); // PULLUP ?
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}
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pinMode(_STQ, INPUT);
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}
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bool MT8870::available()
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{
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return (digitalRead(_STQ) == HIGH);
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}
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char MT8870::read()
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{
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uint8_t n = readRaw();
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if (n < 16) return "D1234567890*#ABC"[n];
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return 255;
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}
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uint8_t MT8870::readRaw()
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{
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_val = 255;
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if (available())
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{
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_val = 0;
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if (digitalRead(_q[0]) == HIGH) _val += 0x01;
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if (digitalRead(_q[1]) == HIGH) _val += 0x02;
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if (digitalRead(_q[2]) == HIGH) _val += 0x04;
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if (digitalRead(_q[3]) == HIGH) _val += 0x08;
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}
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_lastTimeRead = millis();
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return _val;
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}
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uint8_t MT8870::lastRaw()
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{
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return _val;
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};
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uint32_t MT8870::lastTimeRead()
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{
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return _lastTimeRead;
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};
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// -- END OF FILE --
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