use float to calc gamma, cleanup

dsp.c

@@ -73,7 +73,7 @@ hilbert_transform(void)
   }
 }
 
-void calclate_gamma(void)
+void calclate_gamma(float *gamma)
 #if 0
 {
   __SIMD32_TYPE *r = __SIMD32_CONST(refiq_buf);
@@ -103,23 +103,23 @@ void calclate_gamma(void)
   int16_t *r = refiq_buf;
   int16_t *s = samp_buf;
   int len = SAMPLE_LEN/5;
-  double acc_r = 0;
+  float acc_r = 0;
-  double acc_i = 0;
+  float acc_i = 0;
-  double acc_ref = 0;
+  float acc_ref = 0;
   int i;
-  double rn;
+  float rn;
 
   for (i = 0; i < len; i++) {
     int16_t s0 = *s++;
     int16_t rr = *r++;
     int16_t ri = *r++;
-    acc_r += (double)(s0 * rr);
+    acc_r += (float)(s0 * rr);
-    acc_i += (double)(s0 * ri);
+    acc_i += (float)(s0 * ri);
-    acc_ref += (double)rr*rr + (double)ri*ri;
+    acc_ref += (float)rr*rr + (float)ri*ri;
   }
   rn = sqrtf(acc_ref / len);
-  gamma_real = 16 * acc_r / rn / len;
+  gamma[0] = 16 * acc_r / rn / len;
-  gamma_imag = 16 * acc_i / rn / len;
+  gamma[1] = 16 * acc_i / rn / len;
 }
 #endif
 

ili9431.c

@@ -1,3 +1,4 @@
+#include <math.h>
 #include "ch.h"
 #include "hal.h"
 #include "nanovna.h"
@@ -451,7 +452,7 @@ draw_on_strut(int v0, int v1, int color)
 
 void sweep_plot(int32_t freq, int first)
 {
-  float value = 10 - log10f(gamma_real*gamma_real + gamma_imag*gamma_imag);
+  float value = 11 - log10f(measured[0]*measured[0] + measured[1]*measured[1]);
   int curr_x = ((float)WIDTH * (freq - fstart) / (fend - fstart));
   value *= 29;
 

main.c

@@ -8,6 +8,7 @@
 #include <shell.h>
 #include <stdlib.h>
 #include <string.h>
+#include <math.h>
 
 RTCDateTime timespec;
 
@@ -82,6 +83,7 @@ resume_sweep(void)
 
 static void cmd_pause(BaseSequentialStream *chp, int argc, char *argv[])
 {
+    (void)chp;
     (void)argc;
     (void)argv;
     pause_sweep();
@@ -89,6 +91,7 @@ static void cmd_pause(BaseSequentialStream *chp, int argc, char *argv[])
 
 static void cmd_resume(BaseSequentialStream *chp, int argc, char *argv[])
 {
+    (void)chp;
     (void)argc;
     (void)argv;
     resume_sweep();
@@ -210,8 +213,7 @@ volatile int16_t wait_count = 0;
 int16_t dump_selection = 0;
 
 int16_t dsp_disabled = FALSE;
-int32_t gamma_real;
+float measured[4];
-int32_t gamma_imag;
 
 
 
@@ -241,14 +243,6 @@ void i2s_end_callback(I2SDriver *i2sp, size_t offset, size_t n)
     --wait_count;
   }
 
-#if 0
-  if (request_calcgamma > 0) {
-    if (request_calcgamma == 1)
-      calclate_gamma();
-    --request_calcgamma;
-  }
-#endif
-
 #if PORT_SUPPORTS_RT
   cnt_e = port_rt_get_counter_value();
   stat.interval_cycles = cnt_s - stat.last_counter_value;
@@ -304,10 +298,10 @@ static void cmd_gamma(BaseSequentialStream *chp, int argc, char *argv[])
   while (wait_count)
     ;
   dsp_disabled = TRUE;
-  calclate_gamma();
+  calclate_gamma(&measured[0]);
   dsp_disabled = FALSE;
 
-  chprintf(chp, "%d %d\r\n", gamma_real, gamma_imag);
+  chprintf(chp, "%d %d %d %d\r\n", measured[0], measured[1], measured[2], measured[3]);
 }
 
 
@@ -318,7 +312,7 @@ int16_t sweep_points = 101;
 static void cmd_scan(BaseSequentialStream *chp, int argc, char *argv[])
 {
   int i;
-  int32_t freq, cur_freq, step;
+  int32_t freq, step;
   int delay;
   (void)argc;
   (void)argv;
@@ -329,7 +323,6 @@ static void cmd_scan(BaseSequentialStream *chp, int argc, char *argv[])
   delay = set_frequency(freq);
   delay += 2;
   for (i = 0; i < sweep_points; i++) {
-    cur_freq = freq;
     freq = freq + step;
     wait_count = delay;
     while (wait_count)
@@ -338,11 +331,11 @@ static void cmd_scan(BaseSequentialStream *chp, int argc, char *argv[])
     __disable_irq();
     delay = set_frequency(freq);
     palClearPad(GPIOC, GPIOC_LED);
-    calclate_gamma();
+    calclate_gamma(&measured[0]);
     palSetPad(GPIOC, GPIOC_LED);
     //dsp_disabled = FALSE;
     __enable_irq();
-    chprintf(chp, "%d %d %d\r\n", cur_freq, gamma_real, gamma_imag);
+    chprintf(chp, "%d %d %d %d\r\n", measured[0], measured[1], measured[2], measured[3]);
   }
 }
 
@@ -361,16 +354,14 @@ void scan_lcd(void)
     cur_freq = freq;
     freq = freq + step;
     wait_count = delay;
+    tlv320aic3204_select_in3();
     while (wait_count)
       ;
     palClearPad(GPIOC, GPIOC_LED);
-    //dsp_disabled = TRUE;
     __disable_irq();
     delay = set_frequency(freq);
-    calclate_gamma();
+    calclate_gamma(&measured[0]);
-    //dsp_disabled = FALSE;
     __enable_irq();
-    //chprintf(chp, "%d %d %d\r\n", cur_freq, gamma_real, gamma_imag);
     sweep_plot(cur_freq, first);
     first = FALSE;
     palSetPad(GPIOC, GPIOC_LED);
@@ -380,6 +371,7 @@ void scan_lcd(void)
 
 static void cmd_scan_lcd(BaseSequentialStream *chp, int argc, char *argv[])
 {
+  (void)chp;
   (void)argc;
   (void)argv;
   pause_sweep();
@@ -424,6 +416,7 @@ static void cmd_sweep(BaseSequentialStream *chp, int argc, char *argv[])
 static void cmd_test(BaseSequentialStream *chp, int argc, char *argv[])
 {
   int i;
+  (void)chp;
   (void)argc;
   (void)argv;
 
@@ -505,8 +498,8 @@ static void cmd_stat(BaseSequentialStream *chp, int argc, char *argv[])
     acc0 += (p[i] - ave0)*(p[i] - ave0);
     acc1 += (p[i+1] - ave1)*(p[i+1] - ave1);
   }
-  stat.rms[0] = sqrt(acc0 / count);
+  stat.rms[0] = sqrtf(acc0 / count);
-  stat.rms[1] = sqrt(acc1 / count);
+  stat.rms[1] = sqrtf(acc1 / count);
   stat.ave[0] = ave0;
   stat.ave[1] = ave1;
 

nanovna.h

@@ -37,11 +37,10 @@ extern int16_t samp_buf[];
 //extern int16_t refq_buf[];
 extern int16_t refiq_buf[];
 
-extern int32_t gamma_real;
+extern float measured[4];
-extern int32_t gamma_imag;
 
 void dsp_process(int16_t *src, size_t len);
-void calclate_gamma(void);
+void calclate_gamma(float *gamma);
 
 int si5351_set_frequency_with_offset(int freq, int offset, uint8_t drive_strength);
 
@@ -49,7 +48,7 @@ void ili9341_init(void);
 void ili9341_test(int mode);
 
 void sweep_plot(int32_t freq, int first);
-void sweep_tail();
+void sweep_tail(void);
 
 extern const uint16_t x5x7_bits [];
 extern const uint32_t numfont20x24[][24];

si5351.c

@@ -296,8 +296,10 @@ si5351_set_frequency_with_offset(int freq, int offset, uint8_t drive_strength)
     band = 2;
   }
 
+#if 0
   if (current_band != band)
     si5351_disable_output();
+#endif
 
   switch (band) {
   case 0:
@@ -335,11 +337,13 @@ si5351_set_frequency_with_offset(int freq, int offset, uint8_t drive_strength)
     break;
   }
 
-  if (current_band != band) {
   si5351_reset_pll();
+#if 0
+  if (current_band != band) {
     si5351_enable_output();
     delay += 5;
   }
+#endif
   current_band = band;
   return delay;
 }