80 lines
1.9 KiB
C++
80 lines
1.9 KiB
C++
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#include "Waveforms.h"
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#define PWM_BIT_WIDTH 8
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#define PWM_PIN 5 // PWM-Pin für DAC0 auf dem Arduino Nano 328
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uint8_t wf_wave0 = 0;
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uint8_t wf_pos = 0;
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uint16_t wf_freq = 0;
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unsigned long wf_sample_us = 0;
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unsigned long wf_prevMicros = 0;
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bool wf_outputEnabled = true; // Variable to control waveform output state
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void initWaveformGenerator()
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{
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pinMode(PWM_PIN, OUTPUT);
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setWaveform(WAVEFORM_SINUS);
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// Call the function to set default frequency, here you might want to specify a default frequency
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setWaveformFrequency(WAVEFORM_DEFAULT_FREQ_HZ);
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}
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void setWaveform(uint8_t waveform0)
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{
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if (waveform0 >= 0 and waveform0 < WAVEFORM_MAXWAVEFORM_NUM)
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{
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// Set default waveforms
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wf_wave0 = waveform0;
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} else {
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wf_wave0 = WAVEFORM_SINUS;
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}
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}
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void setWaveformFrequency(uint16_t frequency)
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{
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if (frequency >= 1 and frequency < 8000)
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{
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wf_freq = frequency;
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} else {
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wf_freq = WAVEFORM_DEFAULT_FREQ_HZ;
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}
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wf_sample_us = 1000000UL / ((unsigned long)wf_freq * WAVEFORM_MAX_SAMPLES_NUM);
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}
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void enableWaveformOutput()
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{
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wf_outputEnabled = true;
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}
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void disableWaveformOutput()
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{
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wf_outputEnabled = false;
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}
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void pollWaveformGenerator()
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{
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if (wf_outputEnabled)
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{
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unsigned long currentMicros = micros(); // Aktuelle Zeit abrufen
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if (currentMicros - wf_prevMicros >= wf_sample_us)
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{
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wf_prevMicros = currentMicros;
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uint16_t sample = map(waveformsTable[wf_wave0][wf_pos], 0, 0xfff, 0, (1 << PWM_BIT_WIDTH)-1);
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sample = constrain(sample, 0, (1 << PWM_BIT_WIDTH)-1);
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analogWrite(PWM_PIN, sample); // write the selected waveform on DAC0
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// analogWrite(PWM_PIN, 128); // write the selected waveform on DAC0
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wf_pos++;
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if (wf_pos == WAVEFORM_MAX_SAMPLES_NUM) // Reset the counter to repeat the wave
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wf_pos = 0;
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}
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} else {
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analogWrite(PWM_PIN, 0);
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}
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}
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