From e4693349cf862f8c609a0a7586b24d703486fff9 Mon Sep 17 00:00:00 2001
From: jaseg <git-bigdata-wsl-arch@jaseg.de>
Date: Fri, 6 Mar 2020 11:54:33 +0100
Subject: Correlator seems to be working

---
 controller/fw/src/dsss_demod.c | 25 +++++++++++++------------
 1 file changed, 13 insertions(+), 12 deletions(-)

(limited to 'controller/fw/src')

diff --git a/controller/fw/src/dsss_demod.c b/controller/fw/src/dsss_demod.c
index 7a2e0cc..7feb41b 100644
--- a/controller/fw/src/dsss_demod.c
+++ b/controller/fw/src/dsss_demod.c
@@ -32,6 +32,7 @@ void dsss_demod_step(struct dsss_demod_state *st, float new_value) {
 //#define DEBUG_PRINT(...) ((void)0)
 //#define DEBUG_PRINTN(...) ((void)0)
     bool debug = sim_pos % DSSS_CORRELATION_LENGTH == DSSS_CORRELATION_LENGTH-1;
+    //bool debug = sim_pos > 1000;
     if (debug) DEBUG_PRINT("Iteration %zd", sim_pos);
     //const float peak_group_threshold = 0.05 * DSSS_CORRELATION_LENGTH;
     //const float hole_patching_threshold = 0.01 * DSSS_CORRELATION_LENGTH;
@@ -42,12 +43,16 @@ void dsss_demod_step(struct dsss_demod_state *st, float new_value) {
 
     /* use new, incremented wpos for gold_correlate_step as first element of old data in ring buffer */
     for (size_t i=0; i<DSSS_GOLD_CODE_COUNT; i++)
-        st->correlation[i][st->correlation_wpos] = gold_correlate_step(i, st->signal, st->signal_wpos, debug);
+        st->correlation[i][st->correlation_wpos] = gold_correlate_step(i, st->signal, st->signal_wpos, false);
     /* debug */
     if (debug) {
+        DEBUG_PRINTN("                 [");
+        for (size_t i=0; i<DSSS_GOLD_CODE_COUNT; i++)
+            DEBUG_PRINTN("%8d  ", i);
+        DEBUG_PRINTN("]\n");
         DEBUG_PRINTN("    correlation: [");
         for (size_t i=0; i<DSSS_GOLD_CODE_COUNT; i++)
-            DEBUG_PRINTN("%f, ", st->correlation[i][st->correlation_wpos]);
+            DEBUG_PRINTN("%8.5f, ", st->correlation[i][st->correlation_wpos]);
         DEBUG_PRINTN("]\n");
     }
     /* end */
@@ -57,24 +62,20 @@ void dsss_demod_step(struct dsss_demod_state *st, float new_value) {
     for (size_t i=0; i<DSSS_GOLD_CODE_COUNT; i++)
         cwt[i] = cwt_convolve_step(st->correlation[i], st->correlation_wpos);
     /* debug */
-    /*
-    if (debug) DEBUG_PRINTN("    cwt: [");
+    if (debug) DEBUG_PRINTN("    cwt:         [");
     for (size_t i=0; i<DSSS_GOLD_CODE_COUNT; i++)
-        if (debug) DEBUG_PRINTN("%f, ", cwt[i]);
+        if (debug) DEBUG_PRINTN("%8.5f, ", cwt[i]);
     if (debug) DEBUG_PRINTN("]\n");
-    */
     /* end */
 
     float avg[DSSS_GOLD_CODE_COUNT];
     for (size_t i=0; i<DSSS_GOLD_CODE_COUNT; i++)
         avg[i] = run_iir(fabs(cwt[i]), ARRAY_LENGTH(cwt_filter_bq), cwt_filter_bq, st->cwt_filter[i].st);
     /* debug */
-    /*
-    DEBUG_PRINTN("    avg: [");
+    if (debug) DEBUG_PRINTN("    avg:         [");
     for (size_t i=0; i<DSSS_GOLD_CODE_COUNT; i++)
-        DEBUG_PRINTN("%f, ", avg[i]);
-    DEBUG_PRINTN("]\n");
-    */
+        if (debug) DEBUG_PRINTN("%8.5f, ", avg[i]);
+    if (debug) DEBUG_PRINTN("]\n");
     /* end */
 
     float max_val = st->group.max;
@@ -150,7 +151,7 @@ float cwt_convolve_step(const float v[DSSS_WAVELET_LUT_SIZE], size_t offx) {
         sum += v[(offx + j) % DSSS_WAVELET_LUT_SIZE] * dsss_cwt_wavelet_table[j];
         //DEBUG_PRINT("        j=%d v=%f w=%f", j, v[(offx + j) % DSSS_WAVELET_LUT_SIZE], dsss_cwt_wavelet_table[j]);
     }
-    return sum / DSSS_WAVELET_LUT_SIZE;
+    return sum;
 }
 
 /* Compute last element of correlation for input [a] and hard-coded gold sequences.
-- 
cgit