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Add ddr pdm mics

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This commit is contained in:
Ed Clarke
2018-10-31 13:25:46 +00:00
parent 35468c7d77
commit 5643d2b675
5 changed files with 157 additions and 22 deletions
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52
examples/xua_lite_example/src/audio_hub.xc
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@@ -5,21 +5,47 @@
#define DEBUG_UNIT XUA_AUDIO_HUB
#define DEBUG_PRINT_ENABLE_XUA_AUDIO_HUB 1
#include "debug_print.h"
#include "mic_array.h"
void mic_array_decimator_set_samprate(const unsigned samplerate, int fir_gain_compen[], int * unsafe fir_coefs[], int mic_decimator_fir_data_array[], mic_array_decimator_conf_common_t *dcc, mic_array_decimator_config_t dc[]);
void setup_audio_gpio(out port p_gpio){
// Reset DAC and disable MUTE
p_gpio <: 0x0;
delay_milliseconds(1);
p_gpio <: 0x1;
delay_milliseconds(1);
}
//Globally declared for 64b alignment
int mic_decimator_fir_data_array[8][THIRD_STAGE_COEFS_PER_STAGE * PDM_MAX_DECIMATION] = {{0}};
mic_array_frame_time_domain mic_audio_frame[2];
[[distributable]]
void AudioHub(server i2s_frame_callback_if i2s,
streaming chanend c_audio_hub,
client i2c_master_if ?i_i2c,
client output_gpio_if dac_reset)
streaming chanend c_audio,
streaming chanend (&?c_ds_output)[1])
{
int32_t samples_out[NUM_USB_CHAN_OUT] = {0};
int32_t samples_in[NUM_USB_CHAN_IN] = {0};
// Reset DAC
dac_reset.output(0);
delay_milliseconds(1);
dac_reset.output(1);
#if XUA_NUM_PDM_MICS > 0
unsigned buffer;
int output[XUA_NUM_PDM_MICS] = {0};
const unsigned decimatorCount = 1; // Supports up to 4 mics
mic_array_decimator_conf_common_t dcc;
int * unsafe fir_coefs[7];
mic_array_decimator_config_t dc[1];
int fir_gain_compen[7];
mic_array_frame_time_domain * unsafe current;
mic_array_decimator_set_samprate(DEFAULT_FREQ, fir_gain_compen, fir_coefs, mic_decimator_fir_data_array[0], &dcc, dc);
mic_array_decimator_configure(c_ds_output, decimatorCount, dc);
mic_array_init_time_domain_frame(c_ds_output, decimatorCount, buffer, mic_audio_frame, dc);
#endif
while (1) {
@@ -42,10 +68,16 @@ void AudioHub(server i2s_frame_callback_if i2s,
case i2s.restart_check() -> i2s_restart_t restart:
restart = I2S_NO_RESTART; // Keep on looping
timer tmr; int t0, t1; tmr :> t0;
for (int i = 0; i < NUM_USB_CHAN_OUT; i++) c_audio_hub :> samples_out[i];
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 :> samples_out[i];
// for (int i = 0; i < NUM_USB_CHAN_IN; i++) c_audio <: samples_in[i];
//tmr :> t1; debug_printf("%d\n", t1 - t0);
//delay_microseconds(10); //Test backpressure tolerance
//delay_microseconds(15); //Test backpressure tolerance
current = mic_array_get_next_time_domain_frame(c_ds_output, decimatorCount, buffer, mic_audio_frame, dc);
unsafe {
samples_out[0] = current->data[0][0];
samples_out[1] = current->data[1][0];
}
break;
}
}