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sort of demo code

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Andrew Stanford-Jason
2015-09-22 15:30:31 +01:00
parent 71f55b183b
commit 62d2d1d5be
1 changed files with 185 additions and 23 deletions
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208
module_usb_audio/pcm_pdm_mic.xc
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@@ -8,6 +8,8 @@
#include <string.h> #include <string.h>
#include <xclib.h> #include <xclib.h>
#include "static_constants.h" #include "static_constants.h"
#include "debug_print.h"
#if 1 #if 1
on tile[0]: in port p_pdm_clk = XS1_PORT_1E; on tile[0]: in port p_pdm_clk = XS1_PORT_1E;
on tile[0]: in buffered port:8 p_pdm_mics = XS1_PORT_8B; on tile[0]: in buffered port:8 p_pdm_mics = XS1_PORT_8B;
@@ -15,7 +17,129 @@ in port p_mclk = on tile[0]: XS1_PORT_1F;
clock mclk = on tile[0]: XS1_CLKBLK_1; clock mclk = on tile[0]: XS1_CLKBLK_1;
clock pdmclk = on tile[0]: XS1_CLKBLK_3; clock pdmclk = on tile[0]: XS1_CLKBLK_3;
in port p_buttons = on tile[0]: XS1_PORT_4C;
// LEDs
out port p_led0to7 = on tile[0]: XS1_PORT_8C;
out port p_led8 = on tile[0]: XS1_PORT_1K;
out port p_led9 = on tile[0]: XS1_PORT_1L;
out port p_led10to12 = on tile[0]: XS1_PORT_8D;
out port p_leds_oen = on tile[0]: XS1_PORT_1P;
// Buttons
in port p_buttons = on tile[0]: XS1_PORT_4A;
enum buttons
{
BUTTON_A=1<<0,
BUTTON_B=1<<1,
BUTTON_C=1<<2,
BUTTON_D=1<<3
};
#define BUTTON_PRESSED(but_mask, old_val, new_val) (((old_val) & (but_mask)) == (but_mask) && ((new_val) & (but_mask)) == 0)
#define BUTTON_DEBOUNCE_DELAY (20000000)
#define LED_ON 0xFFFF
void buttons_and_leds(chanend c)
{
int button_val;
int buttons_active = 1;
unsigned buttons_timeout;
unsigned time;
unsigned glow_time;
timer button_tmr;
timer leds_tmr;
timer glow_tmr;
const int pwm_cycle = 100000; // The period in 100Mhz timer ticks of the pwm
const int pwm_res = 256; // The resolution of the pwm
const int pwm_delay = pwm_cycle / pwm_res; // The period between updates to the port output
int count = 0; // The count that tracks where we are in the pwm cycle
int period = 1 * 1000 * 1000 * 100 * 15; // period from off to on = 1s;
unsigned res = 300; // increment the brightness in this
// number of steps
int delay = period / res; // how long to wait between updates
// int delay = 1 * 1000 * 1000 * 100;
int dir = 1;
int on_led = 0;
p_leds_oen <: 1;
p_leds_oen <: 0;
// This array stores the pwm levels for the leds
int level[13] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
for (int i=0; i < 13; i++) {
level[i] = level[i] / (0xFFFF / pwm_res);
}
p_buttons :> button_val;
leds_tmr :> time;
glow_tmr :> glow_time;
int only_one_mic = 1;
p_led0to7 <:~0;
p_led8 <:~0;
p_led9 <:~0;
//p_led10to12 <:~0;
// p_leds_oen <:~0;
p_led10to12 <: ~((only_one_mic&0x1)<<2);
level[0] = 0xff;
while (1) {
select
{
case buttons_active => p_buttons when pinsneq(button_val) :> unsigned new_button_val:
if BUTTON_PRESSED(BUTTON_A, button_val, new_button_val) {
debug_printf("Button A\n");
only_one_mic = 1-only_one_mic;
only_one_mic? printstrln("one"):printstrln("all");
p_led10to12 <: ~((only_one_mic&0x1)<<2);
c <: 0;
buttons_active = 0;
}
if BUTTON_PRESSED(BUTTON_B, button_val, new_button_val) {
debug_printf("Button B\n");
only_one_mic = 1-only_one_mic;
only_one_mic? printstrln("one"):printstrln("all");
p_led10to12 <: ~((only_one_mic&0x1)<<2);
c <: 0;
buttons_active = 0;
}
if BUTTON_PRESSED(BUTTON_C, button_val, new_button_val) {
debug_printf("Button C\n");
only_one_mic = 1-only_one_mic;
only_one_mic? printstrln("one"):printstrln("all");
p_led10to12 <: ~((only_one_mic&0x1)<<2);
c <: 0;
buttons_active = 0;
}
if BUTTON_PRESSED(BUTTON_D, button_val, new_button_val) {
debug_printf("Button D\n");
only_one_mic = 1-only_one_mic;
only_one_mic? printstrln("one"):printstrln("all");
p_led10to12 <: ~((only_one_mic&0x1)<<2);
c <: 0;
buttons_active = 0;
}
if (!buttons_active)
{
button_tmr :> buttons_timeout;
buttons_timeout += BUTTON_DEBOUNCE_DELAY;
}
button_val = new_button_val;
break;
case !buttons_active => button_tmr when timerafter(buttons_timeout) :> void:
buttons_active = 1;
p_buttons :> button_val;
break;
}
}
}
typedef struct { typedef struct {
unsigned ch_a; unsigned ch_a;
@@ -34,7 +158,7 @@ static int dc_offset_removal(int sample, int &prex_x, int &prev_y){
return r; return r;
} }
void example(streaming chanend c_ds_output_0, streaming chanend c_ds_output_1, streaming chanend c_pcm_out) void example(streaming chanend c_ds_output_0, streaming chanend c_ds_output_1, streaming chanend c_pcm_out, chanend cc)
{ {
@@ -52,6 +176,7 @@ void example(streaming chanend c_ds_output_0, streaming chanend c_ds_output_1, s
c_ds_output_0 <: (synchronised_audio * unsafe)audio[0].data[0]; c_ds_output_0 <: (synchronised_audio * unsafe)audio[0].data[0];
c_ds_output_1 <: (synchronised_audio * unsafe)audio[0].data[2]; c_ds_output_1 <: (synchronised_audio * unsafe)audio[0].data[2];
int only_one_mic=1;
while(1) while(1)
{ {
@@ -65,24 +190,55 @@ void example(streaming chanend c_ds_output_0, streaming chanend c_ds_output_1, s
// audio[buffer] is good to go // audio[buffer] is good to go
int a = dc_offset_removal( audio[buffer].data[1][0].ch_a, prev_x[0], prev_y[0]); int a = dc_offset_removal( audio[buffer].data[0][0].ch_b, prev_x[0], prev_y[0]);
int b = dc_offset_removal( audio[buffer].data[1][0].ch_b, prev_x[1], prev_y[1]); int b = dc_offset_removal( audio[buffer].data[1][0].ch_a, prev_x[1], prev_y[1]);
int c = dc_offset_removal( audio[buffer].data[1][0].ch_b, prev_x[2], prev_y[2]);
int d = dc_offset_removal( audio[buffer].data[2][0].ch_a, prev_x[3], prev_y[3]);
int e = dc_offset_removal( audio[buffer].data[2][0].ch_b, prev_x[4], prev_y[4]);
int f = dc_offset_removal( audio[buffer].data[3][0].ch_a, prev_x[5], prev_y[5]);
int g = dc_offset_removal( audio[buffer].data[3][0].ch_b, prev_x[6], prev_y[6]);
//xscope_int(0,a); // printf("%x %x %x %x %x %x %x\n", a, b, c, d, e, f, g);
//xscope_int(1,b);
unsigned v = a*a;
select {
case cc:> int:{
only_one_mic = 1-only_one_mic;
break;
}
default:break;
}
if((-a) > max) max = (-a); if((-a) > max) max = (-a);
if(a > max) max = a; if(a > max) max = a;
if((-b) > max) max = (-b); int output;
if(b > max) max = b; if(only_one_mic){
int output_a = a<<(clz(max)-1); output = a<<(clz(max)-1);
int output_b = b<<(clz(max)-1); } else {
if((-a) > max) max = (-a);
if(a > max) max = a;
if((-b) > max) max = (-b);
if(b > max) max = b;
if((-c) > max) max = (-c);
if(c > max) max = c;
if((-d) > max) max = (-d);
if(d > max) max = d;
if((-e) > max) max = (-e);
if(e > max) max = e;
if((-f) > max) max = (-f);
if(f > max) max = f;
output = a+b+c+d+e+f+g+g;
output >>=3;
output = output<<(clz(max)-1);
}
max = max - (max>>17); max = max - (max>>17);
c_pcm_out :> unsigned req; c_pcm_out :> unsigned req;
c_pcm_out <: output_a; c_pcm_out <: output;
c_pcm_out <: output_b; c_pcm_out <: output;
} }
} }
} }
@@ -102,23 +258,29 @@ void pcm_pdm_mic(streaming chanend c_pcm_out)
start_clock(mclk); start_clock(mclk);
start_clock(pdmclk); start_clock(pdmclk);
unsafe chan c;
{ par {
unsigned long long * unsafe p_shared_memory = shared_memory; buttons_and_leds(c);
par
unsafe
{ {
unsigned long long * unsafe p_shared_memory = shared_memory;
par
{
//Input stage //Input stage
pdm_first_stage(p_pdm_mics, p_shared_memory, pdm_first_stage(p_pdm_mics, p_shared_memory,
PDM_BUFFER_LENGTH_LOG2, c_sync, PDM_BUFFER_LENGTH_LOG2, c_sync,
c_4x_pdm_mic_0, c_4x_pdm_mic_1); c_4x_pdm_mic_0, c_4x_pdm_mic_1);
pdm_to_pcm_4x(c_4x_pdm_mic_0, c_ds_output_0); pdm_to_pcm_4x(c_4x_pdm_mic_0, c_ds_output_0);
pdm_to_pcm_4x(c_4x_pdm_mic_1, c_ds_output_1); pdm_to_pcm_4x(c_4x_pdm_mic_1, c_ds_output_1);
example(c_ds_output_0, c_ds_output_1, c_pcm_out); example(c_ds_output_0, c_ds_output_1, c_pcm_out, c);
}
} }
} }
} }