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Basic hook up of audio to buffer (without FIFO) - output audible!

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This commit is contained in:
Ed Clarke
2018-10-26 14:16:17 +01:00
parent 1db927601a
commit 2405b2f4f1
5 changed files with 44 additions and 33 deletions
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20
examples/xua_lite_example/src/audio_hub.xc
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@@ -9,12 +9,12 @@
[[distributable]]
void AudioHub(server i2s_frame_callback_if i2s,
chanend c_aud,
chanend c_audio_hub,
client i2c_master_if ?i_i2c,
client output_gpio_if dac_reset)
{
int32_t samples[8] = {0}; // Array used for looping back samples
int32_t samples_out[NUM_USB_CHAN_OUT] = {0};
int32_t samples_in[NUM_USB_CHAN_IN] = {0};
// Set reset DAC
dac_reset.output(0);
@@ -29,19 +29,21 @@ void AudioHub(server i2s_frame_callback_if i2s,
i2s_config.mclk_bclk_ratio = (MCLK_48/DEFAULT_FREQ)/64;
debug_printf("I2S init\n");
break;
break;
case i2s.receive(size_t n_chans, int32_t in_samps[n_chans]):
for (int i = 0; i < n_chans; i++) samples[i] = in_samps[i]; // copy samples
break;
for (int i = 0; i < n_chans; i++) samples_in[i] = in_samps[i];
break;
case i2s.send(size_t n_chans, int32_t out_samps[n_chans]):
for (int i = 0; i < n_chans; i++) out_samps[i] = samples[i]; // copy samples
break;
for (int i = 0; i < n_chans; i++) out_samps[i] = samples_out[i];
break;
case i2s.restart_check() -> i2s_restart_t restart:
restart = I2S_NO_RESTART; // Keep on looping
break;
for (int i = 0; i < NUM_USB_CHAN_IN; i++) c_audio_hub <: samples_in[i];
for (int i = 0; i < NUM_USB_CHAN_OUT; i++) c_audio_hub :> samples_out[i];
break;
}
}
}