From: c vw <dl1ycf@darc.de>
Date: Wed, 10 Apr 2019 13:16:46 +0000 (+0200)
Subject: some improvements
X-Git-Url: https://git.rkrishnan.org/pf/content/frontends/%3C?a=commitdiff_plain;h=208e42af50f36fd418045c5b3acd72f2e7f7eaae;p=pihpsdr.git
some improvements
---
diff --git a/hpsdrsim.c b/hpsdrsim.c
index 55882c7..bbac2cd 100755
--- a/hpsdrsim.c
+++ b/hpsdrsim.c
@@ -1,3 +1,38 @@
+/*
+ * HPSDR simulator, (C) Christoph van Wuellen, April 2019
+ *
+ * This program simulates a HPSDR board.
+ * If an SDR program such as phipsdr "connects" with this program, it
+ * writes to stdout what goes on. This is great for debugging.
+ *
+ * In addition, I have built in the following features:
+ *
+ * This device has three ADCs, which "see" the following input
+ *
+ * ADC1: ADC noise (16-bit ADC) plus a 800 Hz signal at -100dBm
+ * ADC2: upon RX or with sample rate != 48000: ADC noise (16-bit ADC) plus a 2000 Hz signal at - 80dBm
+ * ADC2: upon TX with sample rate=48000: TX feedback signal with some distortion. This signal is modulated
+ * according to the "TX drive" and "TX ATT" settings.
+ * ADC3: TX signal with a peak value of 0.4 (irrespective of TX drive level)
+ *
+ * Upon RX, the two "signals" to ADC1 and ADC2 are amplified or attenuated
+ * according to the preamp/attenuator settings.
+ *
+ * Upon TX, ADC2 "sees" the TX signal with some distortion. This signal
+ * is attenuated according to the TX att setting.
+ *
+ * The default association:
+ * RX1: ADC1
+ * RX2: ADC2
+ * RX3: ADC2
+ * RX4: ADC3
+ *
+ * RX5 to RX8: no signal
+ *
+ * This is the setting for PURESIGNAL with HERMES boards. The ADC settings can be changed by the
+ * SDR program. For Orion2 boards (Anan7000 etc), we should connect RX4 with ADC2 and RX5 with ADC3.
+ *
+ */
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
@@ -53,12 +88,9 @@ int txdrive = 0;
int txatt = 0;
int sidetone_volume = -1;
int cw_internal = -1;
-int rx1_att = -1;
+int rx_att[2] = {-1,-1};
int rx1_attE = -1;
-int rx1_preamp = -1;
-int rx2_preamp = -1;
-int rx3_preamp = -1;
-int rx4_preamp = -1;
+int rx_preamp[4] = {-1,-1,-1,-1};
int MerTxATT0 = -1;
int MerTxATT1 = -1;
int MetisDB9 = -1;
@@ -72,25 +104,13 @@ int ptt=-1;
int att=-1;
int TX_class_E = -1;
int OpenCollectorOutputs=-1;
-long tx_freq_1=-1;
-long rx_freq_1=-1;
-long rx_freq_2=-1;
-long rx_freq_3=-1;
-long rx_freq_4=-1;
-long rx_freq_5=-1;
-long rx_freq_6=-1;
-long rx_freq_7=-1;
+long tx_freq=-1;
+long rx_freq[7] = {-1,-1,-1,-1,-1,-1,-1};
int hermes_config=-1;
int alex_lpf=-1;
int alex_hpf=-1;
int c25_ext_board_i2c_data=-1;
-int rx1_adc=-1;
-int rx2_adc=-1;
-int rx3_adc=-1;
-int rx4_adc=-1;
-int rx5_adc=-1;
-int rx6_adc=-1;
-int rx7_adc=-1;
+int rx_adc[7]={0,1,1,2,-1,-1,-1};
int cw_hang = -1;
int cw_reversed = -1;
int cw_speed = -1;
@@ -99,12 +119,14 @@ int cw_weight = -1;
int cw_spacing = -1;
int cw_delay = -1;
int CommonMercuryFreq = -1;
-int rx2_att = -1;
int freq=-1;
+// floating-point represeners of TX att, RX att, and RX preamp settings
+
double txdrv_dbl = 1.0;
double txatt_dbl = 1.0;
+double rxatt_dbl[4] = {1.0, 1.0, 1.0, 1.0}; // this reflects both ATT and PREAMP
int sock_ep2;
@@ -562,42 +584,42 @@ void process_ep2(uint8_t *frame)
case 2:
case 3:
- chk_data(frame[4] | (frame[3] << 8) | (frame[2] << 16) | (frame[1] << 24), tx_freq_1,"TX FREQ");
+ chk_data(frame[4] | (frame[3] << 8) | (frame[2] << 16) | (frame[1] << 24), tx_freq,"TX FREQ");
break;
case 4:
case 5:
- chk_data(frame[4] | (frame[3] << 8) | (frame[2] << 16) | (frame[1] << 24), rx_freq_1,"RX FREQ1");
+ chk_data(frame[4] | (frame[3] << 8) | (frame[2] << 16) | (frame[1] << 24), rx_freq[0],"RX FREQ1");
break;
case 6:
case 7:
- chk_data(frame[4] | (frame[3] << 8) | (frame[2] << 16) | (frame[1] << 24), rx_freq_2,"RX FREQ2");
+ chk_data(frame[4] | (frame[3] << 8) | (frame[2] << 16) | (frame[1] << 24), rx_freq[1],"RX FREQ2");
break;
case 8:
case 9:
- chk_data(frame[4] | (frame[3] << 8) | (frame[2] << 16) | (frame[1] << 24), rx_freq_3,"RX FREQ3");
+ chk_data(frame[4] | (frame[3] << 8) | (frame[2] << 16) | (frame[1] << 24), rx_freq[2],"RX FREQ3");
break;
case 10:
case 11:
- chk_data(frame[4] | (frame[3] << 8) | (frame[2] << 16) | (frame[1] << 24), rx_freq_4,"RX FREQ4");
+ chk_data(frame[4] | (frame[3] << 8) | (frame[2] << 16) | (frame[1] << 24), rx_freq[3],"RX FREQ4");
break;
case 12:
case 13:
- chk_data(frame[4] | (frame[3] << 8) | (frame[2] << 16) | (frame[1] << 24), rx_freq_5,"RX FREQ5");
+ chk_data(frame[4] | (frame[3] << 8) | (frame[2] << 16) | (frame[1] << 24), rx_freq[4],"RX FREQ5");
break;
case 14:
case 15:
- chk_data(frame[4] | (frame[3] << 8) | (frame[2] << 16) | (frame[1] << 24), rx_freq_6,"RX FREQ6");
+ chk_data(frame[4] | (frame[3] << 8) | (frame[2] << 16) | (frame[1] << 24), rx_freq[5],"RX FREQ6");
break;
case 16:
case 17:
- chk_data(frame[4] | (frame[3] << 8) | (frame[2] << 16) | (frame[1] << 24), rx_freq_7,"RX FREQ7");
+ chk_data(frame[4] | (frame[3] << 8) | (frame[2] << 16) | (frame[1] << 24), rx_freq[6],"RX FREQ7");
break;
case 18:
@@ -612,10 +634,10 @@ void process_ep2(uint8_t *frame)
case 20:
case 21:
- chk_data((frame[1] & 0x01) >> 0, rx1_preamp, "RX1 preamp");
- chk_data((frame[1] & 0x02) >> 1, rx2_preamp, "RX2 preamp");
- chk_data((frame[1] & 0x04) >> 2, rx3_preamp, "RX3 preamp");
- chk_data((frame[1] & 0x08) >> 3, rx4_preamp, "RX4 preamp");
+ chk_data((frame[1] & 0x01) >> 0, rx_preamp[0], "ADC1 preamp");
+ chk_data((frame[1] & 0x02) >> 1, rx_preamp[1], "ADC2 preamp");
+ chk_data((frame[1] & 0x04) >> 2, rx_preamp[2], "ADC3 preamp");
+ chk_data((frame[1] & 0x08) >> 3, rx_preamp[3], "ADC4 preamp");
chk_data((frame[1] & 0x10) >> 4, tip_ring , "TIP/Ring");
chk_data((frame[1] & 0x20) >> 5, MicBias , "MicBias");
chk_data((frame[1] & 0x40) >> 6, MicPTT , "MicPTT");
@@ -628,19 +650,27 @@ void process_ep2(uint8_t *frame)
chk_data((frame[3] & 0x0F) >> 0, MetisDB9 , "MetisDB9");
chk_data((frame[3] & 0x10) >> 4, MerTxATT1 , "Mercury Att on TX/1");
- chk_data((frame[4] & 0x1F) >> 0, rx1_att, "RX1 ATT");
+ chk_data((frame[4] & 0x1F) >> 0, rx_att[0], "RX1 ATT");
chk_data((frame[4] & 0x20) >> 5, rx1_attE, "RX1 ATT enable");
+ // Set RX amplification factors. Assume 20 dB preamps
+ rxatt_dbl[0]=pow(10.0, -0.05*(rx_att[0]-20*rx_preamp[0]));
+ rxatt_dbl[1]=pow(10.0, -0.05*(rx_att[1]-20*rx_preamp[1]));
+ rxatt_dbl[2]=pow(10.0, (double) rx_preamp[2]);
+ rxatt_dbl[3]=pow(10.0, (double) rx_preamp[3]);
break;
case 22:
case 23:
- chk_data(frame[1] & 0x1f, rx2_att,"RX2 ATT");
+ chk_data(frame[1] & 0x1f, rx_att[1],"RX2 ATT");
chk_data((frame[2] >> 6) & 1, cw_reversed, "CW REV");
chk_data(frame[3] & 63, cw_speed, "CW SPEED");
chk_data((frame[3] >> 6) & 3, cw_mode, "CW MODE");
chk_data(frame[4] & 127, cw_weight,"CW WEIGHT");
chk_data((frame[4] >> 7) & 1, cw_spacing, "CW SPACING");
+
+ // Set RX amplification factors. Assume 20 dB preamps
+ rxatt_dbl[1]=pow(10.0, -0.05*(rx_att[1]-20*rx_preamp[1]));
break;
case 24:
@@ -652,13 +682,13 @@ void process_ep2(uint8_t *frame)
case 28:
case 29:
- chk_data((frame[1] & 0x03) >> 0, rx1_adc, "RX1 ADC");
- chk_data((frame[1] & 0x0C) >> 2, rx2_adc, "RX2 ADC");
- chk_data((frame[1] & 0x30) >> 4, rx3_adc, "RX3 ADC");
- chk_data((frame[1] & 0xC0) >> 6, rx4_adc, "RX4 ADC");
- chk_data((frame[2] & 0x03) >> 0, rx5_adc, "RX5 ADC");
- chk_data((frame[2] & 0x0C) >> 2, rx6_adc, "RX6 ADC");
- chk_data((frame[2] & 0x30) >> 4, rx7_adc, "RX7 ADC");
+ chk_data((frame[1] & 0x03) >> 0, rx_adc[0], "RX1 ADC");
+ chk_data((frame[1] & 0x0C) >> 2, rx_adc[1], "RX2 ADC");
+ chk_data((frame[1] & 0x30) >> 4, rx_adc[2], "RX3 ADC");
+ chk_data((frame[1] & 0xC0) >> 6, rx_adc[3], "RX4 ADC");
+ chk_data((frame[2] & 0x03) >> 0, rx_adc[4], "RX5 ADC");
+ chk_data((frame[2] & 0x0C) >> 2, rx_adc[5], "RX6 ADC");
+ chk_data((frame[2] & 0x30) >> 4, rx_adc[6], "RX7 ADC");
chk_data((frame[3] & 0x1f), txatt, "TX ATT");
txatt_dbl=pow(10.0, -0.05*(double) txatt);
break;
@@ -677,15 +707,6 @@ void process_ep2(uint8_t *frame)
chk_data((frame[3] << 4) | (frame[4] & 255), freq, "SIDE TONE FREQ");
break;
}
-
-#ifdef DEBUG_EP2
- fprintf(stderr, "DEBUG_EP2: Frames after switch case statement:\n");
- fprintf(stderr, "DEBUG_EP2: frame[0]: %d\n", frame[0]);
- fprintf(stderr, "DEBUG_EP2: frame[1]: %d\n", frame[1]);
- fprintf(stderr, "DEBUG_EP2: frame[2]: %d\n", frame[2]);
- fprintf(stderr, "DEBUG_EP2: frame[3]: %d\n", frame[3]);
- fprintf(stderr, "DEBUG_EP2: frame[4]: %d\n", frame[4]);
-#endif
}
//
@@ -697,12 +718,10 @@ void process_ep2(uint8_t *frame)
static double noiseItab[LENNOISE];
static double noiseQtab[LENNOISE];
-static double T1000Itab[384];
-static double T1000Qtab[384];
+static double T0800Itab[480];
+static double T0800Qtab[480];
static double T2000Itab[192];
static double T2000Qtab[192];
-static double T4000Itab[96];
-static double T4000Qtab[96];
void *handler_ep6(void *arg)
{
@@ -730,9 +749,8 @@ void *handler_ep6(void *arg)
#endif
int wait;
int noiseIQpt;
- int len4000,pt4000;
int len2000,pt2000;
- int len1000,pt1000;
+ int len0800,pt0800;
double run,inc;
double i1,i2,q1,q2;
@@ -763,37 +781,28 @@ void *handler_ep6(void *arg)
}
noiseIQpt=0;
//
- // b) a 4000, 2000, and 1000 Hz tone in upper side band
+ // b) some tones in the upper side band (one wave)
//
- len4000=12 << rate; // we must make one sine wave
- len2000=24 << rate; // we must make one sine wave
- len1000=48 << rate; // we must make one sine wave
+ len2000=24 << rate;
+ len0800=60 << rate;
- inc = 6.283185307179586476925287 / (double) len4000;
- run = 0.0;
- for (i=0; i<len4000; i++) {
- T4000Qtab[i]=0.1*cos(run);
- T4000Itab[i]=0.1*sin(run);
- run += inc;
- }
inc = 6.283185307179586476925287 / (double) len2000;
run = 0.0;
for (i=0; i<len2000; i++) {
- T2000Qtab[i]=0.1*cos(run);
- T2000Itab[i]=0.1*sin(run);
+ T2000Qtab[i]=cos(run);
+ T2000Itab[i]=sin(run);
run += inc;
}
- inc = 6.283185307179586476925287 / (double) len1000;
+ inc = 6.283185307179586476925287 / (double) len0800;
run = 0.0;
- for (i=0; i<len1000; i++) {
- T1000Qtab[i]=0.1*cos(run);
- T1000Itab[i]=0.1*sin(run);
+ for (i=0; i<len0800; i++) {
+ T0800Qtab[i]=cos(run);
+ T0800Itab[i]=sin(run);
run += inc;
}
- pt4000=0;
pt2000=0;
- pt1000=0;
+ pt0800=0;
clock_gettime(CLOCK_MONOTONIC, &delay);
@@ -819,144 +828,96 @@ void *handler_ep6(void *arg)
for (i = 0; i < 2; ++i)
{
- pointer = buffer + i * 516 - i % 2 * 4 + 8;
- memcpy(pointer, header + header_offset, 8);
-
- header_offset = header_offset >= 32 ? 0 : header_offset + 8;
-
- //
- // TODO: HERMES: Copy TX samples back to RX4, and distorted TX samples to RX3
- // This allows for testing PURESIGNAL.
- // METIS: TX to RX2, distorted TX to RX1
- // ANGELIA: TX to RX5, distroted TX to RX4 (also for ORION and ORION2)
- //
- pointer += 8;
- memset(pointer, 0, 504);
- for (j=0; j<n; j++) {
- //
- // RX1 samples: noise
- //
- sample= noiseItab[noiseIQpt] * 8388607.0;
- *pointer++ = (sample >> 16) & 0xFF;
- *pointer++ = (sample >> 8) & 0xFF;
- *pointer++ = (sample >> 0) & 0xFF;
- sample=noiseQtab[noiseIQpt] * 8388607.0;
- *pointer++ = (sample >> 16) & 0xFF;
- *pointer++ = (sample >> 8) & 0xFF;
- *pointer++ = (sample >> 0) & 0xFF;
- if (receivers > 1) {
- //
- // RX2 samples:
- // If transmitting AND samplerate == 48000: RX feedback; else tone 2000
- //
- if (rate == 0 && ptt) {
- // We add some third-order distortion
- i1=isample[rxptr]*txdrv_dbl;
- q1=qsample[rxptr]*txdrv_dbl;
- i2=i1*i1;
- q2=q1*q1;
- sample= txatt_dbl*i1*(IM3a+IM3b*i2+IM3b*q2) * 8388607.0;
- *pointer++ = (sample >> 16) & 0xFF;
- *pointer++ = (sample >> 8) & 0xFF;
- *pointer++ = (sample >> 0) & 0xFF;
- sample= txatt_dbl*q1*(IM3a+IM3b*q2+IM3b*i2) * 8388607.0;
- *pointer++ = (sample >> 16) & 0xFF;
- *pointer++ = (sample >> 8) & 0xFF;
- *pointer++ = (sample >> 0) & 0xFF;
- } else {
- sample=T4000Itab[pt4000] * 8388607.0;
- *pointer++ = (sample >> 16) & 0xFF;
- *pointer++ = (sample >> 8) & 0xFF;
- *pointer++ = (sample >> 0) & 0xFF;
- sample=T4000Qtab[pt4000] * 8388607.0;
- *pointer++ = (sample >> 16) & 0xFF;
- *pointer++ = (sample >> 8) & 0xFF;
- *pointer++ = (sample >> 0) & 0xFF;
- }
- }
- if (receivers > 2) {
- //
- // RX3 samples: same as RX2
- //
- if (rate == 0 && ptt) {
- // We add some third-order distortion
- i1=isample[rxptr]*txdrv_dbl;
- q1=qsample[rxptr]*txdrv_dbl;
- i2=i1*i1;
- q2=q1*q1;
- sample= txatt_dbl*i1*(IM3a+IM3b*i2+IM3b*q2) * 8388607.0;
- *pointer++ = (sample >> 16) & 0xFF;
- *pointer++ = (sample >> 8) & 0xFF;
- *pointer++ = (sample >> 0) & 0xFF;
- sample= txatt_dbl*q1*(IM3a+IM3b*q2+IM3b*i2) * 8388607.0;
- *pointer++ = (sample >> 16) & 0xFF;
- *pointer++ = (sample >> 8) & 0xFF;
- *pointer++ = (sample >> 0) & 0xFF;
- } else {
- sample=T4000Itab[pt4000] * 8388607.0;
- *pointer++ = (sample >> 16) & 0xFF;
- *pointer++ = (sample >> 8) & 0xFF;
- *pointer++ = (sample >> 0) & 0xFF;
- sample=T4000Qtab[pt4000] * 8388607.0;
- *pointer++ = (sample >> 16) & 0xFF;
- *pointer++ = (sample >> 8) & 0xFF;
- *pointer++ = (sample >> 0) & 0xFF;
+ pointer = buffer + i * 516 - i % 2 * 4 + 8;
+ memcpy(pointer, header + header_offset, 8);
+
+ header_offset = header_offset >= 32 ? 0 : header_offset + 8;
+
+ pointer += 8;
+ memset(pointer, 0, 504);
+ for (j=0; j<n; j++) {
+ for (k=0; k< receivers; k++) {
+ switch (rx_adc[k]) {
+ case 0:
+ //
+ // ADC1 samples: noise + weak 800 Hz tone
+ //
+ sample= noiseItab[noiseIQpt] * 8388607.0;
+ sample += T0800Itab[pt0800] * 83.886070 *rxatt_dbl[0]; // 100 dB below peak
+ *pointer++ = (sample >> 16) & 0xFF;
+ *pointer++ = (sample >> 8) & 0xFF;
+ *pointer++ = (sample >> 0) & 0xFF;
+ sample=noiseQtab[noiseIQpt] * 8388607.0;
+ sample += T0800Qtab[pt0800] * 83.886070 *rxatt_dbl[0]; // 100 dB below peak
+ *pointer++ = (sample >> 16) & 0xFF;
+ *pointer++ = (sample >> 8) & 0xFF;
+ *pointer++ = (sample >> 0) & 0xFF;
+ break;
+ case 1:
+ if (rate == 0 && ptt) {
+ //
+ // Distorted (feed-back) TX signal
+ // Note we first add distortion, then adjust level
+ // Therefore we first multiply with txdrv_dbl, then
+ // distort, and then attenuate with txatt_dbl.
+ //
+ i1=isample[rxptr]*txdrv_dbl;
+ q1=qsample[rxptr]*txdrv_dbl;
+ i2=i1*i1;
+ q2=q1*q1;
+ sample= txatt_dbl*i1*(IM3a+IM3b*i2+IM3b*q2) * 8388607.0;
+ *pointer++ = (sample >> 16) & 0xFF;
+ *pointer++ = (sample >> 8) & 0xFF;
+ *pointer++ = (sample >> 0) & 0xFF;
+ sample= txatt_dbl*q1*(IM3a+IM3b*q2+IM3b*i2) * 8388607.0;
+ *pointer++ = (sample >> 16) & 0xFF;
+ *pointer++ = (sample >> 8) & 0xFF;
+ *pointer++ = (sample >> 0) & 0xFF;
+ } else {
+ //
+ // ADC2 samples: noise + weak 2000 Hz tone
+ //
+ sample= noiseItab[noiseIQpt] * 8388607.0;
+ sample += T2000Itab[pt2000] * 838.86070 * rxatt_dbl[1]; // 80 dB below peak
+ *pointer++ = (sample >> 16) & 0xFF;
+ *pointer++ = (sample >> 8) & 0xFF;
+ *pointer++ = (sample >> 0) & 0xFF;
+ sample=noiseQtab[noiseIQpt] * 8388607.0;
+ sample += T2000Qtab[pt2000] * 838.86070 * rxatt_dbl[1]; // 80 dB below peak
+ *pointer++ = (sample >> 16) & 0xFF;
+ *pointer++ = (sample >> 8) & 0xFF;
+ *pointer++ = (sample >> 0) & 0xFF;
+ }
+ break;
+ case 2:
+ //
+ // ADC3 samples: TX signal with HWPeak = 0.4
+ //
+ if (rate == 0) {
+ sample= isample[rxptr] * 0.400 * 8388607.0;
+ *pointer++ = (sample >> 16) & 0xFF;
+ *pointer++ = (sample >> 8) & 0xFF;
+ *pointer++ = (sample >> 0) & 0xFF;
+ sample= qsample[rxptr] * 0.400 * 8388607.0;
+ *pointer++ = (sample >> 16) & 0xFF;
+ *pointer++ = (sample >> 8) & 0xFF;
+ *pointer++ = (sample >> 0) & 0xFF;
+ } else {
+ pointer +=6;
+ }
+ break;
+ default:
+ pointer +=6;
}
- }
- if (receivers > 3) {
- //
- // RX4 samples:
- // If transmitting AND samplerate == 48000: TX feedback; else tone 1000
- // TX feedback has level independent of txdrv, the value of 0.4 is
- // typically used for GetPk
- //
- if (rate == 0 && ptt) {
- // Original TX signal
- sample= isample[rxptr] * 0.400 * 8388607.0;
- *pointer++ = (sample >> 16) & 0xFF;
- *pointer++ = (sample >> 8) & 0xFF;
- *pointer++ = (sample >> 0) & 0xFF;
- sample= qsample[rxptr] * 0.400 * 8388607.0;
- *pointer++ = (sample >> 16) & 0xFF;
- *pointer++ = (sample >> 8) & 0xFF;
- *pointer++ = (sample >> 0) & 0xFF;
- } else {
- sample=T1000Itab[pt1000] * 0.400 * 8388607.0;
- *pointer++ = (sample >> 16) & 0xFF;
- *pointer++ = (sample >> 8) & 0xFF;
- *pointer++ = (sample >> 0) & 0xFF;
- sample=T1000Qtab[pt1000] * 0.400 * 8388607.0;
- *pointer++ = (sample >> 16) & 0xFF;
- *pointer++ = (sample >> 8) & 0xFF;
- *pointer++ = (sample >> 0) & 0xFF;
- }
- }
- if (size >26) {
- // RX5 samples: silence
- pointer += 6;
- }
- if (size >32) {
- // RX6 samples: silence
- pointer += 6;
- }
- if (size >38) {
- // RX7 samples: silence
- pointer += 6;
- }
- if (size >44) {
- // RX8 samples: silence
- pointer += 6;
- }
- // Microphone samples: silence
- pointer += 2;
- rxptr++; if (rxptr >= RTXLEN) rxptr=0;
- noiseIQpt++; if (noiseIQpt == LENNOISE) noiseIQpt=rand() / NOISEDIV;
- pt4000++; if (pt4000 == len4000) pt4000=0;
- pt2000++; if (pt2000 == len2000) pt2000=0;
- pt1000++; if (pt1000 == len1000) pt1000=0;
- }
+ }
+ // Microphone samples: silence
+ pointer += 2;
+ rxptr++; if (rxptr >= RTXLEN) rxptr=0;
+ noiseIQpt++; if (noiseIQpt == LENNOISE) noiseIQpt=rand() / NOISEDIV;
+ pt2000++; if (pt2000 == len2000) pt2000=0;
+ pt0800++; if (pt0800 == len0800) pt0800=0;
+ }
}
-
//
// Wait until the time has passed for all these samples
//