288 lines
8.4 KiB
Plaintext
288 lines
8.4 KiB
Plaintext
#include <xscope.h>
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#include <platform.h>
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#include <xs1.h>
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#include <stdlib.h>
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#include "beam.h"
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#include <print.h>
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#include <stdio.h>
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#include <string.h>
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#include <xclib.h>
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#include "static_constants.h"
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#include "debug_print.h"
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#if 1
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on tile[0]: in port p_pdm_clk = XS1_PORT_1E;
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on tile[0]: in buffered port:8 p_pdm_mics = XS1_PORT_8B;
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in port p_mclk = on tile[0]: XS1_PORT_1F;
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clock mclk = on tile[0]: XS1_CLKBLK_1;
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clock pdmclk = on tile[0]: XS1_CLKBLK_3;
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// LEDs
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out port p_led0to7 = on tile[0]: XS1_PORT_8C;
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out port p_led8 = on tile[0]: XS1_PORT_1K;
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out port p_led9 = on tile[0]: XS1_PORT_1L;
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out port p_led10to12 = on tile[0]: XS1_PORT_8D;
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out port p_leds_oen = on tile[0]: XS1_PORT_1P;
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// Buttons
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in port p_buttons = on tile[0]: XS1_PORT_4A;
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enum buttons
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{
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BUTTON_A=1<<0,
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BUTTON_B=1<<1,
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BUTTON_C=1<<2,
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BUTTON_D=1<<3
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};
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#define BUTTON_PRESSED(but_mask, old_val, new_val) (((old_val) & (but_mask)) == (but_mask) && ((new_val) & (but_mask)) == 0)
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#define BUTTON_DEBOUNCE_DELAY (20000000)
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#define LED_ON 0xFFFF
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void buttons_and_leds(chanend c)
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{
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int button_val;
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int buttons_active = 1;
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unsigned buttons_timeout;
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unsigned time;
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unsigned glow_time;
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timer button_tmr;
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timer leds_tmr;
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timer glow_tmr;
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const int pwm_cycle = 100000; // The period in 100Mhz timer ticks of the pwm
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const int pwm_res = 256; // The resolution of the pwm
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const int pwm_delay = pwm_cycle / pwm_res; // The period between updates to the port output
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int count = 0; // The count that tracks where we are in the pwm cycle
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int period = 1 * 1000 * 1000 * 100 * 15; // period from off to on = 1s;
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unsigned res = 300; // increment the brightness in this
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// number of steps
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int delay = period / res; // how long to wait between updates
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// int delay = 1 * 1000 * 1000 * 100;
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int dir = 1;
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int on_led = 0;
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p_leds_oen <: 1;
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p_leds_oen <: 0;
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// This array stores the pwm levels for the leds
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int level[13] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
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for (int i=0; i < 13; i++) {
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level[i] = level[i] / (0xFFFF / pwm_res);
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}
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p_buttons :> button_val;
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leds_tmr :> time;
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glow_tmr :> glow_time;
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int only_one_mic = 1;
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p_led0to7 <:~0;
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p_led8 <:~0;
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p_led9 <:~0;
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//p_led10to12 <:~0;
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// p_leds_oen <:~0;
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p_led10to12 <: ~((only_one_mic&0x1)<<2);
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level[0] = 0xff;
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while (1) {
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select
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{
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case buttons_active => p_buttons when pinsneq(button_val) :> unsigned new_button_val:
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if BUTTON_PRESSED(BUTTON_A, button_val, new_button_val) {
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debug_printf("Button A\n");
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only_one_mic = 1-only_one_mic;
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only_one_mic? printstrln("one"):printstrln("all");
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p_led10to12 <: ~((only_one_mic&0x1)<<2);
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c <: 0;
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buttons_active = 0;
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}
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if BUTTON_PRESSED(BUTTON_B, button_val, new_button_val) {
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debug_printf("Button B\n");
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only_one_mic = 1-only_one_mic;
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only_one_mic? printstrln("one"):printstrln("all");
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p_led10to12 <: ~((only_one_mic&0x1)<<2);
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c <: 0;
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buttons_active = 0;
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}
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if BUTTON_PRESSED(BUTTON_C, button_val, new_button_val) {
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debug_printf("Button C\n");
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only_one_mic = 1-only_one_mic;
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only_one_mic? printstrln("one"):printstrln("all");
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p_led10to12 <: ~((only_one_mic&0x1)<<2);
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c <: 0;
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buttons_active = 0;
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}
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if BUTTON_PRESSED(BUTTON_D, button_val, new_button_val) {
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debug_printf("Button D\n");
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only_one_mic = 1-only_one_mic;
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only_one_mic? printstrln("one"):printstrln("all");
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p_led10to12 <: ~((only_one_mic&0x1)<<2);
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c <: 0;
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buttons_active = 0;
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}
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if (!buttons_active)
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{
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button_tmr :> buttons_timeout;
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buttons_timeout += BUTTON_DEBOUNCE_DELAY;
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}
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button_val = new_button_val;
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break;
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case !buttons_active => button_tmr when timerafter(buttons_timeout) :> void:
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buttons_active = 1;
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p_buttons :> button_val;
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break;
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}
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}
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}
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typedef struct {
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unsigned ch_a;
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unsigned ch_b;
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} double_packed_audio;
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typedef struct {
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double_packed_audio data[4][1<<FRAME_SIZE_LOG2];
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} synchronised_audio;
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static int dc_offset_removal(int sample, int &prex_x, int &prev_y){
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int r = prev_y- (prev_y>>5) + (sample - prex_x);
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prex_x = sample;
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prev_y = r;
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return r;
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}
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void example(streaming chanend c_ds_output_0, streaming chanend c_ds_output_1, streaming chanend c_pcm_out, chanend cc)
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{
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unsigned buffer = 1; //buffer index
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synchronised_audio audio[2]; //double buffered
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memset(audio, sizeof(synchronised_audio), 2);
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int prev_x[7] = {0};
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int prev_y[7] = {0};
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int max = 0;
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unsafe
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{
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c_ds_output_0 <: (synchronised_audio * unsafe)audio[0].data[0];
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c_ds_output_1 <: (synchronised_audio * unsafe)audio[0].data[2];
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int only_one_mic=1;
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while(1)
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{
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schkct(c_ds_output_0, 8);
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schkct(c_ds_output_1, 8);
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c_ds_output_0 <: (synchronised_audio * unsafe)audio[buffer].data[0];
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c_ds_output_1 <: (synchronised_audio * unsafe)audio[buffer].data[2];
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buffer = 1 - buffer;
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// audio[buffer] is good to go
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int a = dc_offset_removal( audio[buffer].data[0][0].ch_b, prev_x[0], prev_y[0]);
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int b = dc_offset_removal( audio[buffer].data[1][0].ch_a, prev_x[1], prev_y[1]);
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int c = dc_offset_removal( audio[buffer].data[1][0].ch_b, prev_x[2], prev_y[2]);
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int d = dc_offset_removal( audio[buffer].data[2][0].ch_a, prev_x[3], prev_y[3]);
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int e = dc_offset_removal( audio[buffer].data[2][0].ch_b, prev_x[4], prev_y[4]);
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int f = dc_offset_removal( audio[buffer].data[3][0].ch_a, prev_x[5], prev_y[5]);
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int g = dc_offset_removal( audio[buffer].data[3][0].ch_b, prev_x[6], prev_y[6]);
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// printf("%x %x %x %x %x %x %x\n", a, b, c, d, e, f, g);
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unsigned v = a*a;
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select {
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case cc:> int:{
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only_one_mic = 1-only_one_mic;
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break;
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}
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default:break;
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}
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if((-a) > max) max = (-a);
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if(a > max) max = a;
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int output;
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if(only_one_mic){
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output = a<<(clz(max)-1);
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} else {
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if((-a) > max) max = (-a);
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if(a > max) max = a;
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if((-b) > max) max = (-b);
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if(b > max) max = b;
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if((-c) > max) max = (-c);
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if(c > max) max = c;
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if((-d) > max) max = (-d);
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if(d > max) max = d;
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if((-e) > max) max = (-e);
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if(e > max) max = e;
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if((-f) > max) max = (-f);
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if(f > max) max = f;
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output = a+b+c+d+e+f+g+g;
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output >>=3;
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output = output<<(clz(max)-1);
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}
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max = max - (max>>17);
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c_pcm_out :> unsigned req;
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c_pcm_out <: output;
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c_pcm_out <: output;
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}
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}
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}
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void pcm_pdm_mic(streaming chanend c_pcm_out)
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{
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streaming chan c_multi_channel_pdm, c_sync, c_4x_pdm_mic_0, c_4x_pdm_mic_1;
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streaming chan c_ds_output_0, c_ds_output_1;
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streaming chan c_buffer_mic0, c_buffer_mic1;
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unsigned long long shared_memory[2] = {0};
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configure_clock_src(mclk, p_mclk);
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configure_clock_src_divide(pdmclk, p_mclk, 2);
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configure_port_clock_output(p_pdm_clk, pdmclk);
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configure_in_port(p_pdm_mics, pdmclk);
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start_clock(mclk);
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start_clock(pdmclk);
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chan c;
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par {
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buttons_and_leds(c);
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unsafe
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{
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unsigned long long * unsafe p_shared_memory = shared_memory;
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par
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{
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//Input stage
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pdm_first_stage(p_pdm_mics, p_shared_memory,
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PDM_BUFFER_LENGTH_LOG2, c_sync,
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c_4x_pdm_mic_0, c_4x_pdm_mic_1);
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pdm_to_pcm_4x(c_4x_pdm_mic_0, c_ds_output_0);
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pdm_to_pcm_4x(c_4x_pdm_mic_1, c_ds_output_1);
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example(c_ds_output_0, c_ds_output_1, c_pcm_out, c);
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}
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}
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}
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}
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#endif
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