Added measuring of minimum sweep times

nanovna.h

@@ -631,7 +631,7 @@ void reset_settings(int m);
 enum { S_OFF=0, S_ON=1, S_AUTO_OFF=2, S_AUTO_ON=3 };
 
 #ifdef __FAST_SWEEP__
-#define MINIMUM_SWEEP_TIME  3000U    // Minimum sweep time on zero span in uS
+#define MINIMUM_SWEEP_TIME  2000U    // Minimum sweep time on zero span in uS
 #else
 #define MINIMUM_SWEEP_TIME  15000U   // Minimum sweep time on zero span in uS
 #endif
@@ -859,6 +859,7 @@ void SI4432_SetReference(int freq);
 #define START_PROFILE   systime_t time = chVTGetSystemTimeX();
 #define RESTART_PROFILE   time = chVTGetSystemTimeX();
 #define STOP_PROFILE    {char string_buf[12];plot_printf(string_buf, sizeof string_buf, "T:%06d", chVTGetSystemTimeX() - time);ili9341_drawstringV(string_buf, 1, 180);}
+#define DELTA_TIME (time = chVTGetSystemTimeX() - time)
 // Macros for convert define value to string
 #define STR1(x)  #x
 #define define_to_STR(x)  STR1(x)

sa_core.c

@@ -156,6 +156,12 @@ void reset_settings(int m)
   dirty = true;
 }
 
+static uint32_t extra_vbw_step_time = 0;
+static uint32_t etra_repeat_time = 0;
+static uint32_t minimum_zero_span_sweep_time = 0;
+static uint32_t minimum_sweep_time = 0;
+
+
 uint32_t calc_min_sweep_time_us(void)         // Calculate minimum sweep time in uS needed just because of the delays for the RSSI to become stable
 {
   float t;
@@ -825,7 +831,12 @@ float temppeakLevel;
 int temppeakIndex;
 static unsigned long old_freq[4] = { 0, 0, 0, 0 };
 static unsigned long real_old_freq[4] = { 0, 0, 0, 0 };
+volatile int t;
 
+//static uint32_t extra_vbw_step_time = 0;
+//static uint32_t etra_repeat_time = 0;
+//static uint32_t minimum_zero_span_sweep_time = 0;
+//static uint32_t minimum_sweep_time = 0;
 
 void setupSA(void)
 {
@@ -841,6 +852,15 @@ void setupSA(void)
   SI4432_Transmit(0);
   PE4302_init();
   PE4302_Write_Byte(0);
+
+  setting.sweep_time_us = 0;
+  START_PROFILE
+  SI4432_Fill(0,200);
+  int t1 = DELTA_TIME;
+  RESTART_PROFILE
+  SI4432_Fill(0,0);
+  int t2 = DELTA_TIME;
+  t = (t2 - t1) * 100 * 290 / 200;
 }
 extern int SI4432_frequency_changed;
 extern int SI4432_offset_changed;

si4432.c

@@ -404,7 +404,7 @@ void SI4432_Fill(int s, int start)
     t = 0;
 
   SPI2_CLK_LOW;
-  int i = 0;
+  int i = start;
   do {
     palClearPad(GPIOC, sel);
     shiftOut( 0x26 );
@@ -414,7 +414,7 @@ void SI4432_Fill(int s, int start)
     if (t)
       my_microsecond_delay(t);
   } while(1);
-  buf_index = start;
+  buf_index = start; // Is used to skip 1st entry during level triggering
   buf_read = true;
 }
 #endif