mirror of https://github.com/JorjBauer/aiie.git
45 lines
928 B
C++
45 lines
928 B
C++
#include <Arduino.h>
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#include "teensy-speaker.h"
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#include "globals.h"
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TeensySpeaker::TeensySpeaker(uint8_t pinNum) : PhysicalSpeaker()
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{
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toggleState = false;
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speakerPin = pinNum;
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pinMode(speakerPin, OUTPUT); // analog speaker output, used as digital volume control
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mixerValue = numMixed = 0;
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}
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TeensySpeaker::~TeensySpeaker()
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{
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}
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void TeensySpeaker::toggle(uint32_t c)
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{
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toggleState = !toggleState;
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mixerValue = (toggleState ? 0x1FF : 0x00);
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mixerValue >>= (16-g_volume);
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analogWrite(speakerPin, mixerValue);
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}
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void TeensySpeaker::maintainSpeaker(uint32_t c, uint64_t runtimeInMicros)
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{
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// Nothing to do here. We can't run the speaker async, b/c not
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// enough CPU time. So we run the CPU close to sync and hope that
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// the direct pulsing of the speaker is reasonably close to on-time.
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}
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void TeensySpeaker::beginMixing()
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{
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// unused
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}
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void TeensySpeaker::mixOutput(uint8_t v)
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{
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// unused
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}
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