mirror of https://github.com/JorjBauer/aiie.git
34 lines
868 B
C++
34 lines
868 B
C++
#include <Arduino.h>
|
|
#include "teensy-speaker.h"
|
|
|
|
extern int16_t g_volume;
|
|
|
|
TeensySpeaker::TeensySpeaker(uint8_t pinNum) : PhysicalSpeaker()
|
|
{
|
|
speakerState = false;
|
|
speakerPin = pinNum;
|
|
pinMode(speakerPin, OUTPUT); // analog speaker output, used as digital volume control
|
|
nextTransitionAt = 0;
|
|
}
|
|
|
|
TeensySpeaker::~TeensySpeaker()
|
|
{
|
|
}
|
|
|
|
void TeensySpeaker::toggleAtCycle(uint32_t c)
|
|
{
|
|
// FIXME: could tell here if we dropped something - is nextTransitionAt already set? If so, we missed a toggle :(
|
|
nextTransitionAt = c;
|
|
}
|
|
|
|
void TeensySpeaker::maintainSpeaker(uint32_t c)
|
|
{
|
|
if (nextTransitionAt && c >= nextTransitionAt) {
|
|
nextTransitionAt = 0;
|
|
|
|
speakerState = !speakerState;
|
|
// FIXME: glad it's DAC0 and all, but... how does that relate to the pin passed in the constructor?
|
|
analogWriteDAC0(speakerState ? g_volume : 0); // max: 4095
|
|
}
|
|
}
|