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Tidy up mic integration task

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This commit is contained in:
Ross Owen
2015-10-30 11:52:23 +00:00
parent 37752f979c
commit 9e7274d3d3
1 changed files with 32 additions and 39 deletions
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71
module_usb_audio/pdm_mics/pcm_pdm_mic.xc
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@@ -1,4 +1,9 @@
/* This file includes an integration of lib_array_mic into USB Audio */
#include "devicedefines.h"
#if (NUM_PDM_MICS > 0)
/* This file includes an example integration of lib_array_mic into USB Audio */
#include <platform.h>
#include <xs1.h>
@@ -8,58 +13,43 @@
#include <string.h>
#include <xclib.h>
#include <stdint.h>
#include "devicedefines.h"
#include "fir_decimator.h"
#include "mic_array.h"
#include "mic_array_board_support.h"
#define FORM_BEAM 1
#if 1
/* Hardware resources */
in port p_pdm_clk = PORT_PDM_CLK;
in buffered port:32 p_pdm_mics = PORT_PDM_DATA;
in port p_mclk = PORT_PDM_MCLK;
clock pdmclk = on tile[PDM_TILE]: XS1_CLKBLK_3;
in port p_mclk = PORT_PDM_MCLK;
clock mclk = on tile[PDM_TILE]: XS1_CLKBLK_1;
clock pdmclk = on tile[PDM_TILE]: XS1_CLKBLK_3;
void user_pdm_process(frame_audio *audio)
{
static unsigned gain = 8*4096*8;
for(unsigned i=0;i<7;i++)
{
unsigned output = audio->data[i][0];
audio->data[i][0] = ((uint64_t)output*gain)>>8;
}
}
/* User hooks */
unsafe void user_pdm_process(frame_audio * unsafe audio, int output[]);
void user_pdm_init();
void pdm_process(streaming chanend c_ds_output_0, streaming chanend c_ds_output_1, chanend c_audio)
{
unsigned buffer = 1; //buffer index
frame_audio audio[2]; //double buffered
unsigned buffer = 1; // Buffer index
frame_audio audio[2]; // Double buffered
memset(audio, sizeof(frame_audio), 0);
int output[NUM_PDM_MICS];
user_pdm_init();
decimator_init_audio_frame(c_ds_output_0, c_ds_output_1, buffer, audio);
unsafe
while(1)
{
while(1)
frame_audio * unsafe current = decimator_get_next_audio_frame(c_ds_output_0, c_ds_output_1, buffer, audio);
unsafe
{
frame_audio * current = decimator_get_next_audio_frame(c_ds_output_0, c_ds_output_1, buffer, audio);
user_pdm_process(current);
/* Send out the individual mics */
for(unsigned i=0;i<7;i++)
user_pdm_process(current, output);
for(int i = 0; i < NUM_PDM_MICS; i++)
{
unsigned output = current->data[i][0];
c_audio <: output;
c_audio <: output[i];
}
c_audio <: 0;
}
}
}
@@ -67,7 +57,13 @@ void pdm_process(streaming chanend c_ds_output_0, streaming chanend c_ds_output_
#define DF 1
#define OUTPUT_SAMPLE_RATE (48000/DF)
#define MASTER_CLOCK_FREQUENCY 24576000
#if MAX_FREQ != 48000
#error NOT CURRENTLY SUPPORTED
#endif
#if MIN_FREQ != 48000
#error NOT CURRENTLY SUPPORTED
#endif
//TODO make these not global
int data_0[4*COEFS_PER_PHASE*DF] = {0};
@@ -79,11 +75,9 @@ void pcm_pdm_mic(chanend c_pcm_out)
streaming chan c_ds_output_0, c_ds_output_1;
streaming chan c_buffer_mic0, c_buffer_mic1;
configure_clock_src(mclk, p_mclk);
configure_clock_src_divide(pdmclk, p_mclk, 2);
configure_port_clock_output(p_pdm_clk, pdmclk);
configure_in_port(p_pdm_mics, pdmclk);
start_clock(mclk);
start_clock(pdmclk);
unsafe
@@ -98,7 +92,6 @@ void pcm_pdm_mic(chanend c_pcm_out)
decimate_to_pcm_4ch(c_4x_pdm_mic_1, c_ds_output_1, dc1);
pdm_process(c_ds_output_0, c_ds_output_1, c_pcm_out);
}
}
}