Better solutiom of prev fixes (reload si5351 settings on sweep begin)

main.c

@@ -804,18 +804,11 @@ bool sweep(bool break_on_operation)
   // blink LED while scanning
   palClearPad(GPIOC, GPIOC_LED);
   // Power stabilization after LED off, also align timings on i == 0
-
-  // !!!!! Don`t understand why si5351 non stable on band 2 then change from band 3
-  // It fixed if set before one band 1 frequency
-  // Possibly problem in gain, call only si5351_set_frequency_with_offset not work
-  // Also it allow align sweep timings
-  set_frequency(50000000);
-  DSP_START(1);DSP_WAIT_READY;
   for (i = 0; i < sweep_points; i++) {         // 5300
     if (frequencies[i] == 0) break;
     delay = set_frequency(frequencies[i]);     // 700
     tlv320aic3204_select(0);                   // 60 CH0:REFLECT, reset and begin measure
-    DSP_START(delay);                          // 1900
+    DSP_START(delay+((i==0)?1:0));             // 1900
     //================================================
     // Place some code thats need execute while delay
     //================================================

si5351.c

@@ -380,13 +380,16 @@ si5351_set_frequency_with_offset(uint32_t freq, uint8_t drive_strength){
   int delay = DELAY_NORMAL;
   if (freq == current_freq)
     return delay;
+  else if (current_freq > freq)  // Reset band on sweep begin (if set range 150-600, fix error then 600 MHz band 2 or 3 go back)
+    current_band = 0;
+  current_freq = freq;
   uint32_t ofreq = freq + current_offset;
   uint32_t mul = 1, omul = 1;
   uint32_t rdiv = SI5351_R_DIV_1;
   uint32_t fdiv;
-  // Fix possible uncorrect input
+  // Fix possible incorrect input
   drive_strength&=SI5351_CLK_DRIVE_STRENGTH_MASK;
-  current_freq = freq;
+
   if (freq >= config.harmonic_freq_threshold * 7U) {
      mul =  9;
     omul = 11;