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antenna_analyzer_vna.ino
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/**
* Panoramic antenna analyzer based on AD9850 clock
* generator, AD8302 phase/amplitude detector and
* pcd8544 Nokia 5110 display
**/
#include <Adafruit_GFX.h>
#include <Adafruit_PCD8544.h>
#include <AD9850.h>
#include <Rotary.h>
#include <SimpleTimer.h>
#include <EEPROM.h>
#include "Wire.h"
/* --------------------------------------------------------------------------*/
//#define DEBUG_SERIAL
//#define USE_SMITH_CHART
#define BANDS_CNT 12
// AD9850 pins
#define PIN_GEN_RESET 2
#define PIN_GEN_CLK 8
#define PIN_GEN_UD 9
#define PIN_GEN_DATA 10
// analog read pins
#define PIN_SWR_AMP 0
#define PIN_SWR_PHS 1
// rotary encoder pins
#define PIN_ROTARY_CLK A4
#define PIN_ROTARY_DATA A3
#define PIN_ROTARY_BTN A2
// screen pins
#define PIN_PCD_CLK 7
#define PIN_PCD_DIN 6
#define PIN_PCD_DC 5
#define PIN_PCD_CS 4
#define PIN_PCD_RST 3
// EEPROM addresses
#define EEPROM_CONTRAST 0
// swr related parameters
#define SWR_MAX 9999
#define SWR_SCREEN_CONTRAST 60
#define SWR_SCREEN_HEIGHT 48
#define SWR_SCREEN_WIDTH 84
#define SWR_SCREEN_CHAR 8
#define SWR_LIST_SIZE SWR_SCREEN_WIDTH
#define SWR_GRAPH_HEIGHT (SWR_SCREEN_HEIGHT - SWR_SCREEN_CHAR)
#define SWR_MAX_VALUE 4
#define SWR_Z_MAX_OHM 100
#define SWR_Z_MIN_OHM 0
#define SWR_GRID_COUNT_X 12
#define SWR_GRID_STEP_X SWR_LIST_SIZE / SWR_GRID_COUNT_X
#define SWR_GRID_PAD_X ((SWR_LIST_SIZE - 1) % SWR_GRID_STEP_X) / 2
#define SWR_GRID_COUNT_Y SWR_MAX_VALUE
#define SWR_GRID_STEP_Y SWR_GRAPH_HEIGHT / SWR_GRID_COUNT_Y
#define SWR_GRID_SMITH 5
// generator related
#define FREQ_STEP_INC 5000
#define FREQ_STEP_MAX 1000000
#define FREQ_MAX 75000000
#define FREQ_DELAY_MS 5
// adc converter
#define ADC_ITER_CNT 16
#define ADC_DB_RES 60.0 / 1024.0
#define ADC_DB_CENTER 1024 / 2
#define ADC_DB_OFFSET (-30.0)
#define ADC_DEG_RES 180.0 / 1024.0
// utils
#define DEG_TO_RAD(deg) (deg * 3.14159 / 180.0)
#define TO_KHZ(freq) (freq / 1000)
#define VALID_RANGE(freq) (freq < FREQ_MAX)
/* --------------------------------------------------------------------------*/
enum MAIN_SCREEN_STATE
{
S_MAIN_SCREEN = 0,
S_GRAPH_SWR,
S_GRAPH_SWR_AUTO,
S_GRAPH_Z,
S_GRAPH_Z_AUTO,
S_GRAPH_SMITH,
S_GRAPH_SMITH_AUTO,
S_SETTINGS
};
enum SETTINGS_SCREEN_STATE
{
S_SETTINGS_STEP = 0,
S_SETTINGS_CONTRAST,
S_SETTINGS_CAL_50OHM,
S_SETTINGS_CAL_OPEN,
S_SETTINGS_CAL_SHORT,
S_SETTINGS_CAL_DEFAULT
};
/* --------------------------------------------------------------------------*/
// HF band related data
struct band_t
{
uint32_t freq;
uint32_t freq_step;
char *band_name;
// TODO, automatic calibration through settings
int16_t adc_amp_cal_open;
int16_t adc_amp_cal_50ohm;
int16_t adc_phs_cal_open;
int16_t adc_phs_cal_short;
};
// one swr measurement point
struct measurement_t
{
uint32_t freq_khz;
// read from adc
int16_t amp; // amplitude
int16_t phs; // phase
// adjusted by calibration
int16_t amp_adj;
int16_t phs_adj;
float rl_db; // return loss, S11
float phi_deg; // phase shift angle
float rho;
float rs; // real impedance part
float xs; // complex impedance part
float swr;
float z; // impedance vector length
};
/* --------------------------------------------------------------------------*/
// band state
int16_t g_active_band_index = 0;
struct band_t g_active_band;
const struct band_t g_bands[BANDS_CNT] PROGMEM = {
{ 1800000, 10000, "TOP", 782, 550, 345, 1013 },
{ 3500000, 10000, "80m", 808, 490, 120, 1010 },
{ 5350000, 20000, "60m", 812, 495, 70, 1002 },
{ 7100000, 20000, "40m", 814, 495, 51, 995 },
{ 10110000, 25000, "30m", 814, 497, 42, 985 },
{ 14100000, 25000, "20m", 814, 517, 38, 949 },
{ 18100000, 25000, "17m", 814, 531, 44, 918 },
{ 21070000, 25000, "15m", 814, 537, 50, 933 },
{ 24900000, 25000, "12m", 800, 547, 55, 910 },
{ 27000000, 50000, "11m", 811, 568, 60, 904 },
{ 28100000, 50000, "10m", 811, 573, 60, 898 },
{ 50100000, 100000, "6m ", 800, 550, 170, 800 }
};
// swr measurement state
float g_swr_min;
uint32_t g_freq_min;
struct measurement_t g_pt;
int16_t g_amp_list[SWR_LIST_SIZE];
int16_t g_phs_list[SWR_LIST_SIZE];
#ifdef USE_SMITH_CHART
const float g_smith_grid[SWR_GRID_SMITH] = {0.2, 0.5, 1.0, 2.0, 5.0};
#endif
// UI state
uint8_t g_contrast = SWR_SCREEN_CONTRAST;
bool g_do_update = true;
MAIN_SCREEN_STATE g_screen_state = S_MAIN_SCREEN;
// UI state, settings
bool g_settings_selected = false;
SETTINGS_SCREEN_STATE g_settings_screen_state = S_SETTINGS_STEP;
// peripherals
SimpleTimer g_timer;
Rotary g_rotary = Rotary(PIN_ROTARY_CLK, PIN_ROTARY_DATA, PIN_ROTARY_BTN);
Adafruit_PCD8544 g_disp = Adafruit_PCD8544(PIN_PCD_CLK, PIN_PCD_DIN,
PIN_PCD_DC, PIN_PCD_CS,
PIN_PCD_RST);
/* --------------------------------------------------------------------------*/
void setup()
{
#ifdef DEBUG_SERIAL
Serial.begin(9600);
#endif
reflectometer_initialize();
generator_initialize();
swr_list_clear();
band_select(g_active_band_index);
// periodic execution
g_timer.setInterval(500, process_display_swr);
g_timer.setInterval(100, process_rotary_button);
g_timer.setInterval(1, process_rotary);
//attachInterrupt(digitalPinToInterrupt(PIN_ROTARY_BTN), process_rotary_button, CHANGE);
//attachInterrupt(digitalPinToInterrupt(PIN_ROTARY_CLK), process_rotary, CHANGE);
screen_initialize();
}
/* --------------------------------------------------------------------------*/
void reflectometer_initialize()
{
// from AD8302 gain/phase detector
analogReference(EXTERNAL) ;
analogRead(PIN_SWR_AMP);
analogRead(PIN_SWR_PHS);
}
/* --------------------------------------------------------------------------*/
void generator_initialize()
{
DDS.begin(PIN_GEN_CLK, PIN_GEN_UD, PIN_GEN_DATA, PIN_GEN_RESET);
}
void generator_set_frequency(uint32_t freq)
{
DDS.setfreq(freq, 0);
delay(FREQ_DELAY_MS);
}
/* --------------------------------------------------------------------------*/
void screen_initialize()
{
g_disp.begin();
screen_load_settings();
g_disp.display();
}
void screen_rotate_contrast(int8_t dir)
{
g_contrast += dir;
g_disp.setContrast(g_contrast);
}
void screen_load_settings()
{
EEPROM.get(EEPROM_CONTRAST, g_contrast);
if (g_contrast == 0 || g_contrast == 255)
{
g_contrast = SWR_SCREEN_CONTRAST;
EEPROM.put(EEPROM_CONTRAST, g_contrast);
}
g_disp.setContrast(g_contrast);
}
void screen_save_settings()
{
uint8_t contrast;
EEPROM.get(EEPROM_CONTRAST, contrast);
if (contrast != g_contrast)
{
EEPROM.put(EEPROM_CONTRAST, g_contrast);
}
}
/* --------------------------------------------------------------------------*/
void swr_list_clear()
{
for (uint8_t i = 0; i < SWR_LIST_SIZE; i++)
{
g_amp_list[i] = 0;
g_phs_list[i] = 0;
}
}
void swr_list_shift_right()
{
for (uint8_t i = SWR_LIST_SIZE - 2; i != 0; i--)
{
g_amp_list[i + 1] = g_amp_list[i];
g_phs_list[i + 1] = g_phs_list[i];
}
}
void swr_list_shift_left()
{
for (uint8_t i = 0; i < SWR_LIST_SIZE - 2; i++)
{
g_amp_list[i] = g_amp_list[i + 1];
g_phs_list[i] = g_phs_list[i + 1];
}
}
void swr_list_store_center(int amp, int phs)
{
g_amp_list[SWR_LIST_SIZE / 2] = amp;
g_phs_list[SWR_LIST_SIZE / 2] = phs;
}
void swr_list_grid_draw()
{
// center marker
g_disp.drawFastVLine(SWR_LIST_SIZE / 2, SWR_SCREEN_CHAR, SWR_SCREEN_CHAR / 2, BLACK);
// grid
for (uint8_t x = 0; x <= SWR_LIST_SIZE; x += SWR_GRID_STEP_X)
{
for (uint8_t y = 0; y <= SWR_GRAPH_HEIGHT - SWR_GRID_STEP_Y; y += SWR_GRID_STEP_Y)
{
g_disp.drawPixel(x + SWR_GRID_PAD_X, SWR_GRAPH_HEIGHT - y + 1, BLACK);
}
}
}
/* --------------------------------------------------------------------------*/
// NOTE, experimental, just for fun, does not look good on small screen
#ifdef USE_SMITH_CHART
// http://paulbourke.net/geometry/circlesphere/tvoght.c
int circle_circle_intersection(float x0, float y0, float r0,
float x1, float y1, float r1,
float *xi, float *yi,
float *xi_prime, float *yi_prime)
{
float a, dx, dy, d, h, rx, ry;
float x2, y2;
dx = x1 - x0;
dy = y1 - y0;
//d = sqrt((dy*dy) + (dx*dx));
d = hypot(dx,dy); // Suggested by Keith Briggs
if (d > (r0 + r1))
{
return 0;
}
if (d < fabs(r0 - r1))
{
return 0;
}
a = ((r0*r0) - (r1*r1) + (d*d)) / (2.0 * d) ;
x2 = x0 + (dx * a/d);
y2 = y0 + (dy * a/d);
h = sqrt((r0*r0) - (a*a));
rx = -dy * (h/d);
ry = dx * (h/d);
*xi = x2 + rx;
*xi_prime = x2 - rx;
*yi = y2 + ry;
*yi_prime = y2 - ry;
return 1;
}
void swr_list_smith_grid_draw()
{
g_disp.drawLine(0, SWR_SCREEN_HEIGHT / 2,
SWR_SCREEN_WIDTH, SWR_SCREEN_HEIGHT / 2, BLACK);
// R circles: r = 1 / (R + 1); p = (R / (R + 1), 0);
for (uint8_t i = 0; i < SWR_GRID_SMITH; i++)
{
float r = 1.0 / (g_smith_grid[i] + 1.0);
float x = g_smith_grid[i] / (g_smith_grid[i] + 1.0);
g_disp.drawCircle(
SWR_SCREEN_WIDTH / 2 * x + SWR_SCREEN_WIDTH / 2,
SWR_SCREEN_HEIGHT / 2,
SWR_SCREEN_WIDTH / 2 * r,
BLACK);
}
// X circles: r = 1 / X; p = (1, 1 / X);
for (uint8_t i = 0; i < SWR_GRID_SMITH; i++)
{
float r = 1.0 / g_smith_grid[i];
float y = 1.0 / g_smith_grid[i];
g_disp.drawCircle(
SWR_SCREEN_WIDTH,
SWR_SCREEN_WIDTH / 2 * y + SWR_SCREEN_HEIGHT / 2,
SWR_SCREEN_WIDTH / 2 * r,
BLACK);
g_disp.drawCircle(
SWR_SCREEN_WIDTH,
-SWR_SCREEN_WIDTH / 2 * y + SWR_SCREEN_HEIGHT / 2,
SWR_SCREEN_WIDTH / 2 * r,
BLACK);
}
}
void swr_smith_pt_from_z(float rs, float xs, uint8_t &x, uint8_t &y)
{
float rs_r = 1.0 / (rs / 50.0 + 1.0);
float rs_x = (rs / 50.0) / (rs / 50.0 + 1.0);
if (xs == 0)
{
x = SWR_SCREEN_WIDTH / 2;
y = SWR_SCREEN_HEIGHT / 2;
return;
}
float xs_r = 1.0 / (xs / 50.0);
float xs_y = 1.0 / (xs / 50.0);
float sect_x1, sect_y1, sect_x2, sect_y2;
bool is_found = circle_circle_intersection(rs_x, 0, rs_r, 0, xs_y, xs_r,
§_x1, §_y1, §_x2, §_y2);
x = SWR_SCREEN_WIDTH / 2 * sect_x1 + SWR_SCREEN_WIDTH / 2;
y = SWR_SCREEN_WIDTH / 2 * sect_y1 + SWR_SCREEN_HEIGHT / 2;
}
void swr_list_smith_draw()
{
uint8_t x, y, prev_x, prev_y;
for (uint8_t i = 0; i < SWR_LIST_SIZE; i++)
{
g_pt.amp = g_amp_list[i];
g_pt.phs = g_phs_list[i];
swr_calculate();
swr_smith_pt_from_z(g_pt.rs, g_pt.xs, x, y);
if (i > 0)
{
g_disp.drawLine(prev_x, prev_y, x, y, BLACK);
}
prev_x = x;
prev_y = y;
}
}
#endif // USE_SMITH_CHART
/* --------------------------------------------------------------------------*/
uint8_t swr_screen_normalize(float swr)
{
float swr_norm = swr - 1;
if (swr_norm > SWR_MAX_VALUE)
{
swr_norm = SWR_MAX_VALUE;
}
return swr_norm * (float)SWR_GRAPH_HEIGHT / (float)SWR_MAX_VALUE;
}
uint8_t swr_screen_z_normalize(float z)
{
float z_norm = z;
if (z < SWR_Z_MIN_OHM)
{
z_norm = SWR_Z_MIN_OHM;
}
if (z > SWR_Z_MAX_OHM)
{
z_norm = SWR_Z_MAX_OHM;
}
z_norm -= SWR_Z_MIN_OHM;
return z_norm * (float)SWR_GRAPH_HEIGHT / (float)(SWR_Z_MAX_OHM - SWR_Z_MIN_OHM);
}
void swr_list_draw()
{
for (uint8_t i = 0; i < SWR_LIST_SIZE; i++)
{
g_pt.amp = g_amp_list[i];
g_pt.phs = g_phs_list[i];
swr_calculate();
uint8_t swr_norm = swr_screen_normalize(g_pt.swr);
g_disp.drawFastVLine(i, SWR_SCREEN_HEIGHT - swr_norm, swr_norm, BLACK);
}
}
void swr_list_z_draw()
{
uint8_t prev_rs;
uint8_t prev_xs;
for (uint8_t i = 0; i < SWR_LIST_SIZE; i++)
{
g_pt.amp = g_amp_list[i];
g_pt.phs = g_phs_list[i];
swr_calculate();
uint8_t rs = swr_screen_z_normalize(g_pt.rs);
uint8_t xs = swr_screen_z_normalize(g_pt.xs);
if (i > 0)
{
g_disp.drawLine(i - 1, SWR_SCREEN_HEIGHT - prev_rs,
i, SWR_SCREEN_HEIGHT - rs, BLACK);
g_disp.drawLine(i - 1, SWR_SCREEN_HEIGHT - prev_xs,
i, SWR_SCREEN_HEIGHT - xs, BLACK);
}
prev_rs = rs;
prev_xs = xs;
}
}
void swr_list_sweep_and_fill()
{
uint32_t freq_hz = g_active_band.freq - g_active_band.freq_step * SWR_LIST_SIZE / 2;
for (uint8_t i = 0; i < SWR_LIST_SIZE; i++)
{
if (VALID_RANGE(freq_hz))
{
generator_set_frequency(freq_hz);
process_rotary();
process_rotary_button();
swr_measure();
swr_calculate();
swr_update_minimum_swr(g_pt.swr, TO_KHZ(freq_hz));
}
g_amp_list[i] = g_pt.amp;
g_phs_list[i] = g_pt.phs;
freq_hz += g_active_band.freq_step;
} // amp/phs list
generator_set_frequency(g_active_band.freq);
}
void swr_update_minimum_swr(float swr, uint32_t freq_khz)
{
if (swr < g_swr_min)
{
g_swr_min = swr;
g_freq_min = freq_khz;
}
}
uint16_t swr_phs_cal_adjust(uint16_t phs)
{
int16_t phs_cal_diff = g_active_band.adc_phs_cal_short - g_active_band.adc_phs_cal_open;
int32_t phs_result = (long)abs((int)phs - g_active_band.adc_phs_cal_open) * 1024 / phs_cal_diff;
if (phs_result <= 0)
{
phs_result = 1;
}
return phs_result;
}
uint16_t swr_amp_cal_adjust(uint16_t amp)
{
int16_t amp_cal_diff = g_active_band.adc_amp_cal_open - g_active_band.adc_amp_cal_50ohm;
int32_t amp_result = (long)abs((int)amp - g_active_band.adc_amp_cal_open) * ADC_DB_CENTER / amp_cal_diff + ADC_DB_CENTER;
if (amp_result <= ADC_DB_CENTER)
{
amp_result = ADC_DB_CENTER + 1;
}
return amp_result;
}
/* --------------------------------------------------------------------------*/
void swr_measure()
{
g_pt.freq_khz = TO_KHZ(g_active_band.freq);
g_pt.amp = 0;
g_pt.phs = 0;
for (uint8_t i = 0; i < ADC_ITER_CNT; i++)
{
g_pt.amp += analogRead(PIN_SWR_AMP);
g_pt.phs += analogRead(PIN_SWR_PHS);
}
g_pt.amp /= ADC_ITER_CNT;
g_pt.phs /= ADC_ITER_CNT;
}
void swr_calculate()
{
g_pt.amp_adj = swr_amp_cal_adjust(g_pt.amp);
g_pt.phs_adj = swr_phs_cal_adjust(g_pt.phs);
g_pt.rl_db = fabs(((float)g_pt.amp_adj * ADC_DB_RES) + ADC_DB_OFFSET);
g_pt.phi_deg = ((float)g_pt.phs_adj * ADC_DEG_RES);
g_pt.rho = pow(10.0, g_pt.rl_db / -20.0);
float re = g_pt.rho * cos(DEG_TO_RAD(g_pt.phi_deg));
float im = g_pt.rho * sin(DEG_TO_RAD(g_pt.phi_deg));
float denominator = ((1 - re) * (1 - re) + (im * im));
g_pt.rs = fabs((1 - (re * re) - (im * im)) / denominator) * 50.0;
g_pt.xs = fabs(2.0 * im) / denominator * 50.0;
g_pt.z = sqrt(g_pt.rs * g_pt.rs + g_pt.xs * g_pt.xs);
g_pt.swr = fabs(1.0 + g_pt.rho) / (1.001 - g_pt.rho);
g_pt.rl_db *= -1;
}
void swr_print_info()
{
g_disp.print(g_active_band.band_name); g_disp.print(F(": "));
g_disp.print(g_pt.freq_khz); g_disp.println(F(" k"));
g_disp.print(F("SWR: ")); g_disp.println(g_pt.swr);
g_disp.print(F("S11: ") );g_disp.print(g_pt.rl_db);
g_disp.println(F("dB"));
g_disp.print(F("Z:")); g_disp.println(g_pt.z);
g_disp.print(F("R:")); g_disp.print((uint16_t)g_pt.rs);
g_disp.print(F("+j")); g_disp.println((uint16_t)g_pt.xs);
g_disp.print(F("p:")); g_disp.print((uint16_t)g_pt.phi_deg);
g_disp.print(F(" ")); g_disp.print(g_pt.phs);
g_disp.print(F("/")); g_disp.println(g_pt.amp);
}
/* --------------------------------------------------------------------------*/
void band_select_next()
{
g_active_band_index += 1;
if (g_active_band_index >= BANDS_CNT)
{
g_active_band_index = 0;
}
band_select(g_active_band_index);
}
void band_select(uint8_t index)
{
if (index < BANDS_CNT)
{
memcpy_PF((void*)&g_active_band, (uint_farptr_t)&g_bands[index], sizeof(g_bands[index]));
swr_list_clear();
g_swr_min = SWR_MAX;
g_freq_min = TO_KHZ(g_active_band.freq);
generator_set_frequency(g_active_band.freq);
}
}
void band_rotate_frequency(int8_t dir)
{
g_active_band.freq += dir * g_active_band.freq_step;
if (g_active_band.freq > FREQ_MAX)
{
g_active_band.freq = FREQ_MAX;
}
generator_set_frequency(g_active_band.freq);
}
void band_rotate_step(int8_t dir)
{
g_active_band.freq_step += dir * FREQ_STEP_INC;
if (g_active_band.freq_step > FREQ_STEP_MAX)
{
if (dir < 0)
g_active_band.freq_step = 0;
if (dir > 0)
g_active_band.freq_step = FREQ_STEP_MAX;
}
}
/* --------------------------------------------------------------------------*/
void settings_draw()
{
if (g_settings_selected)
{
g_disp.print(F("*"));
}
switch (g_settings_screen_state)
{
case S_SETTINGS_STEP:
g_disp.println(F("<FREQ STEP>\n"));
g_disp.print(F("STEP: "));
g_disp.print(TO_KHZ(g_active_band.freq_step));
g_disp.println(F(" kHz"));
break;
case S_SETTINGS_CONTRAST:
g_disp.println(F("<CONTRAST>\n"));
g_disp.print(F("CONTRAST: "));
g_disp.println(g_contrast);
break;
case S_SETTINGS_CAL_50OHM:
g_disp.println(F("<CAL 50 OHM>\n"));
break;
case S_SETTINGS_CAL_OPEN:
g_disp.println(F("<CAL OPEN>\n"));
break;
case S_SETTINGS_CAL_SHORT:
g_disp.println(F("<CAL SHORT>\n"));
break;
case S_SETTINGS_CAL_DEFAULT:
g_disp.println(F("<CAL DEFAULT>\n"));
break;
default:
break;
} // settings screen
}
void settings_select_next_screen()
{
switch (g_settings_screen_state)
{
case S_SETTINGS_STEP:
g_settings_screen_state = S_SETTINGS_CONTRAST;
break;
case S_SETTINGS_CONTRAST:
g_settings_screen_state = S_SETTINGS_CAL_50OHM;
break;
case S_SETTINGS_CAL_50OHM:
g_settings_screen_state = S_SETTINGS_CAL_OPEN;
break;
case S_SETTINGS_CAL_OPEN:
g_settings_screen_state = S_SETTINGS_CAL_SHORT;
break;
case S_SETTINGS_CAL_SHORT:
g_settings_screen_state = S_SETTINGS_CAL_DEFAULT;
break;
case S_SETTINGS_CAL_DEFAULT:
g_settings_screen_state = S_SETTINGS_STEP;
break;
default:
break;
}
}
void settings_select_prev_screen()
{
switch (g_settings_screen_state)
{
case S_SETTINGS_STEP:
g_settings_screen_state = S_SETTINGS_CAL_DEFAULT;
break;
case S_SETTINGS_CONTRAST:
g_settings_screen_state = S_SETTINGS_STEP;
break;
case S_SETTINGS_CAL_50OHM:
g_settings_screen_state = S_SETTINGS_CONTRAST;
break;
case S_SETTINGS_CAL_OPEN:
g_settings_screen_state = S_SETTINGS_CAL_50OHM;
break;
case S_SETTINGS_CAL_SHORT:
g_settings_screen_state = S_SETTINGS_CAL_OPEN;
break;
case S_SETTINGS_CAL_DEFAULT:
g_settings_screen_state = S_SETTINGS_CAL_SHORT;
break;
default:
break;
}
}
void settings_rotate_screen(int8_t dir)
{
if (dir == 1)
{
settings_select_next_screen();
}
else
{
settings_select_prev_screen();
}
}
void settings_save()
{
screen_save_settings();
}
void settings_rotate(int8_t dir)
{
if (g_settings_selected)
{
switch (g_settings_screen_state)
{
case S_SETTINGS_STEP:
band_rotate_step(dir);
break;
case S_SETTINGS_CONTRAST:
screen_rotate_contrast(dir);
break;
case S_SETTINGS_CAL_50OHM:
break;
case S_SETTINGS_CAL_OPEN:
break;
case S_SETTINGS_CAL_SHORT:
break;
case S_SETTINGS_CAL_DEFAULT:
break;
default:
break;
}
}
else
{
settings_rotate_screen(dir);
}
}
void settings_process_button()
{
if (g_settings_selected)
{
settings_save();
g_settings_selected = false;
}
else
{
g_settings_selected = true;
}
}
/* --------------------------------------------------------------------------*/
void screen_select_next()
{
switch (g_screen_state)
{
case S_MAIN_SCREEN:
g_screen_state = S_GRAPH_SWR;
break;
case S_GRAPH_SWR:
g_screen_state = S_GRAPH_SWR_AUTO;
swr_list_sweep_and_fill();
break;
case S_GRAPH_SWR_AUTO:
g_screen_state = S_GRAPH_Z;
break;
case S_GRAPH_Z:
g_screen_state = S_GRAPH_Z_AUTO;
break;
case S_GRAPH_Z_AUTO:
#ifdef USE_SMITH_CHART
g_screen_state = S_GRAPH_SMITH;
#else
g_screen_state = S_SETTINGS;
#endif
break;
#ifdef USE_SMITH_CHART
case S_GRAPH_SMITH:
g_screen_state = S_GRAPH_SMITH_AUTO;
break;
case S_GRAPH_SMITH_AUTO:
g_screen_state = S_SETTINGS;
break;
#endif
case S_SETTINGS:
g_screen_state = S_MAIN_SCREEN;
break;
default:
break;
}
}
/* --------------------------------------------------------------------------*/
void process_rotary()
{
uint8_t rotary_state = g_rotary.process();
if (rotary_state)
{
int8_t dir = (rotary_state == DIR_CW) ? -1 : 1;
switch (g_screen_state)
{
case S_GRAPH_SWR_AUTO:
case S_GRAPH_Z_AUTO:
case S_GRAPH_SMITH_AUTO:
band_rotate_frequency(dir);
break;
case S_MAIN_SCREEN:
case S_GRAPH_SWR:
case S_GRAPH_Z:
case S_GRAPH_SMITH:
band_rotate_frequency(dir);
if (rotary_state == DIR_CW)
swr_list_shift_right();
else
swr_list_shift_left();
break;
case S_SETTINGS:
settings_rotate(dir);
break;
} // screen state
g_do_update = true;
} // rotary changed
}
void process_rotary_button()
{
uint8_t rotary_btn_state = g_rotary.process_button();
switch (rotary_btn_state)
{
case BTN_RELEASED:
switch (g_screen_state)
{
case S_SETTINGS:
settings_process_button();
break;
default:
band_select_next();