From 07de5cd579218be7ae0820a23c9931123d1afbb7 Mon Sep 17 00:00:00 2001
From: TT <edy555@gmail.com>
Date: Sat, 7 Sep 2019 13:13:25 +0900
Subject: [PATCH] enhancement: adjust delay

---
 main.c   |  8 ++++++--
 si5351.c | 10 ++++++++--
 2 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/main.c b/main.c
index 7a933b3..23ccda4 100644
--- a/main.c
+++ b/main.c
@@ -269,6 +269,8 @@ const int8_t gain_table[] = {
   95  // 1400MHz ~
 };
 
+#define DELAY_GAIN_CHANGE 10
+
 static int
 adjust_gain(int newfreq)
 {
@@ -277,7 +279,7 @@ adjust_gain(int newfreq)
   int old_order = frequency / FREQ_HARMONICS;
   if (new_order != old_order) {
     tlv320aic3204_set_gain(gain_table[new_order], gain_table[new_order]);
-    delay += 10;
+    delay += DELAY_GAIN_CHANGE;
   }
   return delay;
 }
@@ -655,6 +657,8 @@ ensure_edit_config(void)
   cal_status = 0;
 }
 
+#define DELAY_CHANNEL_CHANGE 1
+
 // main loop for measurement
 bool sweep(bool break_on_operation)
 {
@@ -672,7 +676,7 @@ bool sweep(bool break_on_operation)
     (*sample_func)(measured[0][i]);
 
     tlv320aic3204_select_in1(); // CH1:TRANSMISSION
-    wait_dsp(delay);
+    wait_dsp(delay + DELAY_CHANNEL_CHANGE);
 
     /* calculate transmission coeficient */
     (*sample_func)(measured[1][i]);
diff --git a/si5351.c b/si5351.c
index 49de637..76ee744 100644
--- a/si5351.c
+++ b/si5351.c
@@ -296,6 +296,10 @@ si5351_set_frequency(int channel, int freq, uint8_t drive_strength)
 
 int current_band = -1;
 
+#define DELAY_NORMAL 2
+#define DELAY_BANDCHANGE 1
+#define DELAY_LOWBAND 1
+
 /*
  * configure output as follows:
  * CLK0: frequency + offset
@@ -307,7 +311,7 @@ int
 si5351_set_frequency_with_offset(uint32_t freq, int offset, uint8_t drive_strength)
 {
   int band;
-  int delay = 3;
+  int delay = DELAY_NORMAL;
   uint32_t ofreq = freq + offset;
   uint32_t rdiv = SI5351_R_DIV_1;
   if (freq >= config.harmonic_freq_threshold * 3) {
@@ -389,8 +393,10 @@ si5351_set_frequency_with_offset(uint32_t freq, int offset, uint8_t drive_streng
 #if 1
     si5351_enable_output();
 #endif
-    delay += 10;
+    delay += DELAY_BANDCHANGE;
   }
+  if (band == 0)
+    delay += DELAY_LOWBAND;
 
   current_band = band;
   return delay;