mirror of
https://github.com/supleed2/EIE4-FYP.git
synced 2024-11-09 20:05:49 +00:00
47 lines
1.1 KiB
C++
47 lines
1.1 KiB
C++
|
#include "audio"
|
||
|
|
#include <generated/csr.h>
|
||
|
|
#include <stdint.h>
|
||
|
|
|
||
|
|
#ifdef CSR_AUDIO_BASE
|
||
|
|
// Normalise target frequency from float to (24.4 bit) fixed point
|
||
|
|
static inline uint32_t n_tf(float freq) {
|
||
|
|
return static_cast<uint32_t>(freq * 16.0f);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Set all oscillators to (0Hz, sawtooth)
|
||
|
|
void reset_audio(void) {
|
||
|
|
for (int i = 0; i < 64; i++) {
|
||
|
|
audio_osc_write(i);
|
||
|
|
audio_tf_write(0);
|
||
|
|
audio_wav_write(0);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Set oscillator `osc` to waveform `wave`
|
||
|
|
void set_wave(uint32_t osc, wave_t wave) {
|
||
|
|
audio_osc_write(osc);
|
||
|
|
audio_wav_write(wave);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Set oscillator `osc` to frequency `freq`Hz
|
||
|
|
void set_freq(uint32_t osc, float freq) {
|
||
|
|
audio_osc_write(osc);
|
||
|
|
audio_tf_write(n_tf(freq));
|
||
|
|
}
|
||
|
|
|
||
|
|
// Set oscillator `osc` to waveform `wave` at frequency `freq`Hz
|
||
|
|
void audio(uint32_t osc, wave_t wave, float freq) {
|
||
|
|
audio_osc_write(osc);
|
||
|
|
audio_wav_write(wave);
|
||
|
|
audio_tf_write(n_tf(freq));
|
||
|
|
}
|
||
|
|
|
||
|
|
// Set oscillator `osc` to waveform `wave` at frequency `freq`Hz for `ms` milliseconds
|
||
|
|
void timed_freq(uint32_t osc, float freq, unsigned int ms) {
|
||
|
|
audio_osc_write(osc);
|
||
|
|
audio_tf_write(n_tf(freq));
|
||
|
|
busy_wait(ms);
|
||
|
|
audio_tf_write(0);
|
||
|
|
}
|
||
|
|
#endif
|