Mono channels
@@ -8,7 +8,7 @@ use core::f32::consts::PI;
use defmt::{error, info};
use embassy_executor::Spawner;
-use embassy_nrf::i2s::{MckFreq, Mode, Ratio, MODE_MASTER_16000, MODE_MASTER_8000};
+use embassy_nrf::i2s::{MckFreq, Mode, Ratio, MODE_MASTER_16000, MODE_MASTER_8000, Channels};
use embassy_nrf::pac::ficr::info;
use embassy_nrf::{i2s, interrupt};
use {defmt_rtt as _, panic_probe as _};
@@ -37,6 +37,7 @@ async fn main(_spawner: Spawner) {
freq: MckFreq::_32MDiv10,
ratio: Ratio::_256x,
}; // 12500 Hz
+ config.channels = Channels::Left;
let sample_rate = config.mode.sample_rate().expect("I2S Master");
let inv_sample_rate = 1.0 / sample_rate as f32;
@@ -46,25 +47,24 @@ async fn main(_spawner: Spawner) {
let mut i2s = i2s::I2S::new(p.I2S, irq, p.P0_28, p.P0_29, p.P0_31, p.P0_11, p.P0_30, config);
const BUF_SAMPLES: usize = 500;
- const BUF_SIZE: usize = BUF_SAMPLES * 2;
+ const BUF_SIZE: usize = BUF_SAMPLES;
let mut buf = AlignedBuffer([0i16; BUF_SIZE]);
let mut carrier = SineOsc::new();
- carrier.set_frequency(240.0, inv_sample_rate);
+ carrier.set_frequency(16.0, inv_sample_rate);
// let mut modulator = SineOsc::new();
// modulator.set_frequency(0.01, inv_sample_rate);
// modulator.set_amplitude(0.2);
let mut generate = |buf: &mut [i16]| {
- for sample in buf.as_mut().chunks_mut(2) {
+ for sample in buf.as_mut() {
let signal = carrier.generate();
// let modulation = bipolar_to_unipolar(modulator.generate());
// carrier.set_frequency(200.0 + 100.0 * modulation, inv_sample_rate);
// carrier.set_amplitude((modulation);
let value = (i16::MAX as f32 * signal) as i16;
- sample[0] = value;
- sample[1] = value;
+ *sample = value;
}
};
