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main.c
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/*
* Copyright (c) 2016-2017, TAKAHASHI Tomohiro (TTRFTECH) edy555@gmail.com
* All rights reserved.
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3, or (at your option)
* any later version.
*
* The software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#include "ch.h"
#include "hal.h"
#include "usbcfg.h"
#include "si5351.h"
#include "nanovna.h"
#include "fft.h"
#include <chprintf.h>
#include <string.h>
#include <math.h>
/*
* Shell settings
*/
// If need run shell as thread (use more amount of memory fore stack), after
// enable this need reduce spi_buffer size, by default shell run in main thread
// #define VNA_SHELL_THREAD
static BaseSequentialStream *shell_stream = (BaseSequentialStream *)&SDU1;
// Shell new line
#define VNA_SHELL_NEWLINE_STR "\r\n"
// Shell command promt
#define VNA_SHELL_PROMPT_STR "ch> "
// Shell max arguments
#define VNA_SHELL_MAX_ARGUMENTS 4
// Shell max command line size
#define VNA_SHELL_MAX_LENGTH 48
// Shell command functions prototypes
typedef void (*vna_shellcmd_t)(int argc, char *argv[]);
#define VNA_SHELL_FUNCTION(command_name) \
static void command_name(int argc, char *argv[])
// Shell command line buffer, args, nargs, and function ptr
static char shell_line[VNA_SHELL_MAX_LENGTH];
static char *shell_args[VNA_SHELL_MAX_ARGUMENTS + 1];
static uint16_t shell_nargs;
static volatile vna_shellcmd_t shell_function = 0;
//#define ENABLED_DUMP
// Allow get threads debug info
//#define ENABLE_THREADS_COMMAND
// RTC time not used
//#define ENABLE_TIME_COMMAND
// Enable vbat_offset command, allow change battery voltage correction in config
#define ENABLE_VBAT_OFFSET_COMMAND
// Info about NanoVNA, need fore soft
#define ENABLE_INFO_COMMAND
// Enable color command, allow change config color for traces, grid, menu
#define ENABLE_COLOR_COMMAND
static void apply_error_term_at(int i);
static void apply_edelay_at(int i);
static void cal_interpolate(int s);
static void update_frequencies(void);
static void set_frequencies(uint32_t start, uint32_t stop, uint16_t points);
static bool sweep(bool break_on_operation);
static void transform_domain(void);
#define DRIVE_STRENGTH_AUTO (-1)
#define FREQ_HARMONICS (config.harmonic_freq_threshold)
#define IS_HARMONIC_MODE(f) ((f) > FREQ_HARMONICS)
// Obsolete, always use interpolate
#define cal_auto_interpolate TRUE
static int8_t drive_strength = DRIVE_STRENGTH_AUTO;
int8_t sweep_mode = SWEEP_ENABLE;
volatile uint8_t redraw_request = 0; // contains REDRAW_XXX flags
// Version text, displayed in Config->Version menu, also send by info command
const char *info_about[]={
BOARD_NAME,
"2016-2020 Copyright @edy555",
"Licensed under GPL. See: https://github.com/ttrftech/NanoVNA",
"Version: " VERSION,
"Build Time: " __DATE__ " - " __TIME__,
"Kernel: " CH_KERNEL_VERSION,
"Compiler: " PORT_COMPILER_NAME,
"Architecture: " PORT_ARCHITECTURE_NAME " Core Variant: " PORT_CORE_VARIANT_NAME,
"Port Info: " PORT_INFO,
"Platform: " PLATFORM_NAME,
0 // sentinel
};
static THD_WORKING_AREA(waThread1, 640);
static THD_FUNCTION(Thread1, arg)
{
(void)arg;
chRegSetThreadName("sweep");
while (1) {
bool completed = false;
if (sweep_mode&(SWEEP_ENABLE|SWEEP_ONCE)) {
completed = sweep(true);
sweep_mode&=~SWEEP_ONCE;
} else {
__WFI();
}
// Run Shell command in sweep thread
if (shell_function) {
shell_function(shell_nargs - 1, &shell_args[1]);
shell_function = 0;
osalThreadSleepMilliseconds(10);
continue;
}
// Process UI inputs
ui_process();
// Process collected data, calculate trace coordinates and plot only if scan
// completed
if (sweep_mode & SWEEP_ENABLE && completed) {
if ((domain_mode & DOMAIN_MODE) == DOMAIN_TIME) transform_domain();
// Prepare draw graphics, cache all lines, mark screen cells for redraw
plot_into_index(measured);
redraw_request |= REDRAW_CELLS | REDRAW_BATTERY;
if (uistat.marker_tracking) {
int i = marker_search();
if (i != -1 && active_marker != -1) {
markers[active_marker].index = i;
redraw_request |= REDRAW_MARKER;
}
}
}
// plot trace and other indications as raster
draw_all(completed); // flush markmap only if scan completed to prevent
// remaining traces
}
}
static inline void
pause_sweep(void)
{
sweep_mode &= ~SWEEP_ENABLE;
}
static inline void
resume_sweep(void)
{
sweep_mode |= SWEEP_ENABLE;
}
void
toggle_sweep(void)
{
sweep_mode ^= SWEEP_ENABLE;
}
static float
bessel0(float x)
{
const float eps = 0.0001;
float ret = 0;
float term = 1;
float m = 0;
while (term > eps * ret) {
ret += term;
++m;
term *= (x*x) / (4*m*m);
}
return ret;
}
static float
kaiser_window(float k, float n, float beta)
{
if (beta == 0.0) return 1.0;
float r = (2 * k) / (n - 1) - 1;
return bessel0(beta * sqrt(1 - r * r)) / bessel0(beta);
}
static void
transform_domain(void)
{
// use spi_buffer as temporary buffer
// and calculate ifft for time domain
float* tmp = (float*)spi_buffer;
uint8_t window_size = POINTS_COUNT, offset = 0;
uint8_t is_lowpass = FALSE;
switch (domain_mode & TD_FUNC) {
case TD_FUNC_BANDPASS:
offset = 0;
window_size = POINTS_COUNT;
break;
case TD_FUNC_LOWPASS_IMPULSE:
case TD_FUNC_LOWPASS_STEP:
is_lowpass = TRUE;
offset = POINTS_COUNT;
window_size = POINTS_COUNT * 2;
break;
}
float beta = 0.0;
switch (domain_mode & TD_WINDOW) {
case TD_WINDOW_MINIMUM:
beta = 0.0; // this is rectangular
break;
case TD_WINDOW_NORMAL:
beta = 6.0;
break;
case TD_WINDOW_MAXIMUM:
beta = 13;
break;
}
for (int ch = 0; ch < 2; ch++) {
memcpy(tmp, measured[ch], sizeof(measured[0]));
for (int i = 0; i < POINTS_COUNT; i++) {
float w = kaiser_window(i + offset, window_size, beta);
tmp[i * 2 + 0] *= w;
tmp[i * 2 + 1] *= w;
}
for (int i = POINTS_COUNT; i < FFT_SIZE; i++) {
tmp[i * 2 + 0] = 0.0;
tmp[i * 2 + 1] = 0.0;
}
if (is_lowpass) {
for (int i = 1; i < POINTS_COUNT; i++) {
tmp[(FFT_SIZE - i) * 2 + 0] = tmp[i * 2 + 0];
tmp[(FFT_SIZE - i) * 2 + 1] = -tmp[i * 2 + 1];
}
}
fft256_inverse((float(*)[2])tmp);
memcpy(measured[ch], tmp, sizeof(measured[0]));
for (int i = 0; i < POINTS_COUNT; i++) {
measured[ch][i][0] /= (float)FFT_SIZE;
if (is_lowpass) {
measured[ch][i][1] = 0.0;
} else {
measured[ch][i][1] /= (float)FFT_SIZE;
}
}
if ((domain_mode & TD_FUNC) == TD_FUNC_LOWPASS_STEP) {
for (int i = 1; i < POINTS_COUNT; i++) {
measured[ch][i][0] += measured[ch][i - 1][0];
}
}
}
}
// Shell commands output
static int shell_printf(const char *fmt, ...)
{
va_list ap;
int formatted_bytes;
va_start(ap, fmt);
formatted_bytes = chvprintf(shell_stream, fmt, ap);
va_end(ap);
return formatted_bytes;
}
VNA_SHELL_FUNCTION(cmd_pause)
{
(void)argc;
(void)argv;
pause_sweep();
}
VNA_SHELL_FUNCTION(cmd_resume)
{
(void)argc;
(void)argv;
// restore frequencies array and cal
update_frequencies();
if (cal_auto_interpolate && (cal_status & CALSTAT_APPLY))
cal_interpolate(lastsaveid);
resume_sweep();
}
VNA_SHELL_FUNCTION(cmd_reset)
{
(void)argc;
(void)argv;
if (argc == 1) {
if (strcmp(argv[0], "dfu") == 0) {
shell_printf("Performing reset to DFU mode\r\n");
enter_dfu();
return;
}
}
shell_printf("Performing reset\r\n");
rccEnableWWDG(FALSE);
WWDG->CFR = 0x60;
WWDG->CR = 0xff;
/* wait forever */
while (1)
;
}
const int8_t gain_table[] = {
0, // 0 ~ 300MHz
40, // 300 ~ 600MHz
50, // 600 ~ 900MHz
75, // 900 ~ 1200MHz
85, // 1200 ~ 1500MHz
95, // 1500MHz ~
95, // 1800MHz ~
95, // 2100MHz ~
95 // 2400MHz ~
};
#define DELAY_GAIN_CHANGE 2
static int
adjust_gain(uint32_t newfreq)
{
int new_order = newfreq / FREQ_HARMONICS;
int old_order = si5351_get_frequency() / FREQ_HARMONICS;
if (new_order != old_order) {
tlv320aic3204_set_gain(gain_table[new_order], gain_table[new_order]);
return DELAY_GAIN_CHANGE;
}
return 0;
}
int set_frequency(uint32_t freq)
{
int delay = adjust_gain(freq);
int8_t ds = drive_strength;
if (ds == DRIVE_STRENGTH_AUTO) {
ds = freq > FREQ_HARMONICS ? SI5351_CLK_DRIVE_STRENGTH_8MA : SI5351_CLK_DRIVE_STRENGTH_2MA;
}
delay += si5351_set_frequency(freq, ds);
return delay;
}
// Use macro, std isdigit more big
#define _isdigit(c) (c >= '0' && c <= '9')
// Rewrite universal standart str to value functions to more compact
//
// Convert string to int32
static int32_t my_atoi(const char *p)
{
int32_t value = 0;
uint32_t c;
bool neg = false;
if (*p == '-') {neg = true; p++;}
if (*p == '+') p++;
while ((c = *p++ - '0') < 10)
value = value * 10 + c;
return neg ? -value : value;
}
// Convert string to uint32
// 0x - for hex radix
// 0o - for oct radix
// 0b - for bin radix
// default dec radix
uint32_t my_atoui(const char *p)
{
uint32_t value = 0, radix = 10, c;
if (*p == '+') p++;
if (*p == '0') {
switch (p[1]) {
case 'x': radix = 16; break;
case 'o': radix = 8; break;
case 'b': radix = 2; break;
default: goto calculate;
}
p+=2;
}
calculate:
while (1) {
c = *p++ - '0';
// c = to_upper(*p) - 'A' + 10
if (c >= 'A' - '0') c = (c&(~0x20)) - ('A' - '0') + 10;
if (c >= radix) return value;
value = value * radix + c;
}
}
double
my_atof(const char *p)
{
int neg = FALSE;
if (*p == '-')
neg = TRUE;
if (*p == '-' || *p == '+')
p++;
double x = my_atoi(p);
while (_isdigit((int)*p))
p++;
if (*p == '.') {
double d = 1.0f;
p++;
while (_isdigit((int)*p)) {
d /= 10;
x += d * (*p - '0');
p++;
}
}
if (*p == 'e' || *p == 'E') {
p++;
int exp = my_atoi(p);
while (exp > 0) {
x *= 10;
exp--;
}
while (exp < 0) {
x /= 10;
exp++;
}
}
if (neg)
x = -x;
return x;
}
//
// Function used for search substring v in list
// Example need search parameter "center" in "start|stop|center|span|cw" getStringIndex return 2
// If not found return -1
// Used for easy parse command arguments
static int get_str_index(char *v, const char *list)
{
int i = 0;
while (1) {
char *p = v;
while (1) {
char c = *list;
if (c == '|') c = 0;
if (c == *p++) {
// Found, return index
if (c == 0) return i;
list++; // Compare next symbol
continue;
}
break; // Not equal, break
}
// Set new substring ptr
while (1) {
// End of string, not found
if (*list == 0) return -1;
if (*list++ == '|') break;
}
i++;
}
return -1;
}
VNA_SHELL_FUNCTION(cmd_offset)
{
if (argc != 1) {
shell_printf("usage: offset {frequency offset(Hz)}\r\n");
return;
}
si5351_set_frequency_offset(my_atoi(argv[0]));
}
VNA_SHELL_FUNCTION(cmd_freq)
{
if (argc != 1) {
goto usage;
}
uint32_t freq = my_atoui(argv[0]);
pause_sweep();
set_frequency(freq);
return;
usage:
shell_printf("usage: freq {frequency(Hz)}\r\n");
}
VNA_SHELL_FUNCTION(cmd_power)
{
if (argc != 1) {
shell_printf("usage: power {0-3|-1}\r\n");
return;
}
drive_strength = my_atoi(argv[0]);
// set_frequency(frequency);
}
#ifdef ENABLE_TIME_COMMAND
#if HAL_USE_RTC == FALSE
#error "Error cmd_time require define HAL_USE_RTC = TRUE in halconf.h"
#endif
VNA_SHELL_FUNCTION(cmd_time)
{
RTCDateTime timespec;
(void)argc;
(void)argv;
rtcGetTime(&RTCD1, ×pec);
shell_printf("%d/%d/%d %d\r\n", timespec.year+1980, timespec.month, timespec.day, timespec.millisecond);
}
#endif
VNA_SHELL_FUNCTION(cmd_dac)
{
int value;
if (argc != 1) {
shell_printf("usage: dac {value(0-4095)}\r\n"\
"current value: %d\r\n", config.dac_value);
return;
}
value = my_atoui(argv[0]);
config.dac_value = value;
dacPutChannelX(&DACD2, 0, value);
}
VNA_SHELL_FUNCTION(cmd_threshold)
{
uint32_t value;
if (argc != 1) {
shell_printf("usage: threshold {frequency in harmonic mode}\r\n"\
"current: %d\r\n", config.harmonic_freq_threshold);
return;
}
value = my_atoui(argv[0]);
config.harmonic_freq_threshold = value;
}
VNA_SHELL_FUNCTION(cmd_saveconfig)
{
(void)argc;
(void)argv;
config_save();
shell_printf("Config saved.\r\n");
}
VNA_SHELL_FUNCTION(cmd_clearconfig)
{
if (argc != 1) {
shell_printf("usage: clearconfig {protection key}\r\n");
return;
}
if (strcmp(argv[0], "1234") != 0) {
shell_printf("Key unmatched.\r\n");
return;
}
clear_all_config_prop_data();
shell_printf("Config and all cal data cleared.\r\n"\
"Do reset manually to take effect. Then do touch cal and save.\r\n");
}
static struct {
int16_t rms[2];
int16_t ave[2];
int callback_count;
#if 0
int32_t last_counter_value;
int32_t interval_cycles;
int32_t busy_cycles;
#endif
} stat;
int16_t rx_buffer[AUDIO_BUFFER_LEN * 2];
#ifdef ENABLED_DUMP
int16_t dump_buffer[AUDIO_BUFFER_LEN];
int16_t dump_selection = 0;
#endif
volatile uint8_t wait_count = 0;
volatile uint8_t accumerate_count = 0;
const int8_t bandwidth_accumerate_count[] = {
1, // 1kHz
3, // 300Hz
10, // 100Hz
33, // 30Hz
100 // 10Hz
};
float measured[2][POINTS_COUNT][2];
static inline void
dsp_start(int count)
{
wait_count = count;
accumerate_count = bandwidth_accumerate_count[bandwidth];
reset_dsp_accumerator();
}
static inline void
dsp_wait(void)
{
while (accumerate_count > 0)
__WFI();
}
#ifdef ENABLED_DUMP
static void
duplicate_buffer_to_dump(int16_t *p)
{
if (dump_selection == 1)
p = samp_buf;
else if (dump_selection == 2)
p = ref_buf;
memcpy(dump_buffer, p, sizeof dump_buffer);
}
#endif
void i2s_end_callback(I2SDriver *i2sp, size_t offset, size_t n)
{
#if PORT_SUPPORTS_RT
int32_t cnt_s = port_rt_get_counter_value();
int32_t cnt_e;
#endif
int16_t *p = &rx_buffer[offset];
(void)i2sp;
(void)n;
if (wait_count > 1) {
--wait_count;
} else if (wait_count > 0) {
if (accumerate_count > 0) {
dsp_process(p, n);
accumerate_count--;
}
#ifdef ENABLED_DUMP
duplicate_buffer_to_dump(p);
#endif
}
#if PORT_SUPPORTS_RT
cnt_e = port_rt_get_counter_value();
stat.interval_cycles = cnt_s - stat.last_counter_value;
stat.busy_cycles = cnt_e - cnt_s;
stat.last_counter_value = cnt_s;
#endif
stat.callback_count++;
}
static const I2SConfig i2sconfig = {
NULL, // TX Buffer
rx_buffer, // RX Buffer
AUDIO_BUFFER_LEN * 2,
NULL, // tx callback
i2s_end_callback, // rx callback
0, // i2scfgr
2 // i2spr
};
VNA_SHELL_FUNCTION(cmd_data)
{
int i;
int sel = 0;
float (*array)[2];
if (argc == 1)
sel = my_atoi(argv[0]);
if (sel == 0 || sel == 1)
array = measured[sel];
else if (sel >= 2 && sel < 7)
array = cal_data[sel-2];
else
goto usage;
for (i = 0; i < sweep_points; i++)
shell_printf("%f %f\r\n", array[i][0], array[i][1]);
return;
usage:
shell_printf("usage: data [array]\r\n");
}
#ifdef ENABLED_DUMP
VNA_SHELL_FUNCTION(cmd_dump)
{
int i, j;
int len;
if (argc == 1)
dump_selection = my_atoi(argv[0]);
wait_dsp(3);
len = AUDIO_BUFFER_LEN;
if (dump_selection == 1 || dump_selection == 2)
len /= 2;
for (i = 0; i < len; ) {
for (j = 0; j < 16; j++, i++) {
shell_printf("%04x ", 0xffff & (int)dump_buffer[i]);
}
shell_printf("\r\n");
}
}
#endif
VNA_SHELL_FUNCTION(cmd_capture)
{
// read pixel count at one time (PART*2 bytes required for read buffer)
(void)argc;
(void)argv;
int i, y;
#if SPI_BUFFER_SIZE < (3*320 + 1)
#error "Low size of spi_buffer for cmd_capture"
#endif
// read 2 row pixel time (read buffer limit by 2/3 + 1 from spi_buffer size)
for (y = 0; y < 240; y += 2) {
// use uint16_t spi_buffer[2048] (defined in ili9341) for read buffer
uint8_t *buf = (uint8_t *)spi_buffer;
ili9341_read_memory(0, y, 320, 2, 2 * 320, spi_buffer);
for (i = 0; i < 4 * 320; i++) {
streamPut(shell_stream, *buf++);
}
}
}
#if 0
VNA_SHELL_FUNCTION(cmd_gamma)
{
float gamma[2];
(void)argc;
(void)argv;
pause_sweep();
chMtxLock(&mutex);
wait_dsp(4);
calculate_gamma(gamma);
chMtxUnlock(&mutex);
shell_printf("%d %d\r\n", gamma[0], gamma[1]);
}
#endif
static void (*sample_func)(float *gamma) = calculate_gamma;
VNA_SHELL_FUNCTION(cmd_sample)
{
if (argc != 1) goto usage;
// 0 1 2
static const char cmd_sample_list[] = "gamma|ampl|ref";
switch (get_str_index(argv[0], cmd_sample_list)) {
case 0:
sample_func = calculate_gamma;
return;
case 1:
sample_func = fetch_amplitude;
return;
case 2:
sample_func = fetch_amplitude_ref;
return;
default:
break;
}
usage:
shell_printf("usage: sample {%s}\r\n", cmd_sample_list);
}
config_t config = {
.magic = CONFIG_MAGIC,
.dac_value = 1922,
.grid_color = DEFAULT_GRID_COLOR,
.menu_normal_color = DEFAULT_MENU_COLOR,
.menu_active_color = DEFAULT_MENU_ACTIVE_COLOR,
.trace_color = { DEFAULT_TRACE_1_COLOR, DEFAULT_TRACE_2_COLOR, DEFAULT_TRACE_3_COLOR, DEFAULT_TRACE_4_COLOR },
// .touch_cal = { 693, 605, 124, 171 }, // 2.4 inch LCD panel
.touch_cal = { 338, 522, 153, 192 }, // 2.8 inch LCD panel
.harmonic_freq_threshold = 300000000,
.vbat_offset = 500
};
properties_t current_props;
properties_t *active_props = ¤t_props;
// NanoVNA Default settings
static const trace_t def_trace[TRACES_MAX] = {//enable, type, channel, reserved, scale, refpos
{ 1, TRC_LOGMAG, 0, 0, 10.0, NGRIDY-1 },
{ 1, TRC_LOGMAG, 1, 0, 10.0, NGRIDY-1 },
{ 1, TRC_SMITH, 0, 0, 1.0, 0 },
{ 1, TRC_PHASE, 1, 0, 90.0, NGRIDY/2 }
};
static const marker_t def_markers[MARKERS_MAX] = {
{ 1, 30, 0 }, { 0, 40, 0 }, { 0, 60, 0 }, { 0, 80, 0 }
};
// Load propeties default settings
void load_default_properties(void)
{
//Magic add on caldata_save
//current_props.magic = CONFIG_MAGIC;
current_props._frequency0 = 50000; // start = 50kHz
current_props._frequency1 = 900000000; // end = 900MHz
current_props._sweep_points = POINTS_COUNT;
current_props._cal_status = 0;
//This data not loaded by default
//current_props._frequencies[POINTS_COUNT];
//current_props._cal_data[5][POINTS_COUNT][2];
//=============================================
current_props._electrical_delay = 0.0;
memcpy(current_props._trace, def_trace, sizeof(def_trace));
memcpy(current_props._markers, def_markers, sizeof(def_markers));
current_props._velocity_factor = 0.7;
current_props._active_marker = 0;
current_props._domain_mode = 0;
current_props._marker_smith_format = MS_RLC;
current_props._freq_mode = FREQ_MODE_START_STOP;
//Checksum add on caldata_save
//current_props.checksum = 0;
}
void
ensure_edit_config(void)
{
if (active_props == ¤t_props)
return;
//memcpy(¤t_props, active_props, sizeof(config_t));
active_props = ¤t_props;
// move to uncal state
cal_status = 0;
}
#define DELAY_CHANNEL_CHANGE 2
// main loop for measurement
bool sweep(bool break_on_operation)
{
int i, delay;
// blink LED while scanning
palClearPad(GPIOC, GPIOC_LED);
// Power stabilization after LED off, also align timings on i == 0
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 + ((i == 0) ? 1 : 0)); // 1900
//================================================
// Place some code thats need execute while delay
//================================================
dsp_wait();
// calculate reflection coefficient
(*sample_func)(measured[0][i]); // 60
tlv320aic3204_select(1); // 60 CH1:TRANSMISSION, reset and begin measure
dsp_start(DELAY_CHANNEL_CHANGE); // 1700
//================================================
// Place some code thats need execute while delay
//================================================
dsp_wait();
// calculate transmission coefficient
(*sample_func)(measured[1][i]); // 60
// ======== 170 ===========
if (cal_status & CALSTAT_APPLY)
apply_error_term_at(i);
if (electrical_delay != 0)
apply_edelay_at(i);
// back to toplevel to handle ui operation
if (operation_requested && break_on_operation)
return false;
}
// blink LED while scanning
palSetPad(GPIOC, GPIOC_LED);
return true;
}
VNA_SHELL_FUNCTION(cmd_scan)
{
uint32_t start, stop;
int16_t points = sweep_points;
int i;
if (argc < 2 || argc > 4) {
shell_printf("usage: scan {start(Hz)} {stop(Hz)} [points] [outmask]\r\n");
return;
}
start = my_atoui(argv[0]);
stop = my_atoui(argv[1]);
if (start == 0 || stop == 0 || start > stop) {
shell_printf("frequency range is invalid\r\n");
return;
}
if (argc >= 3) {
points = my_atoi(argv[2]);
if (points <= 0 || points > POINTS_COUNT) {
shell_printf("sweep points exceeds range "define_to_STR(POINTS_COUNT)"\r\n");
return;
}
}
set_frequencies(start, stop, points);
if (cal_auto_interpolate && (cal_status & CALSTAT_APPLY))
cal_interpolate(lastsaveid);
pause_sweep();
sweep(false);
// Output data after if set (faster data recive)
if (argc == 4) {
uint16_t mask = my_atoui(argv[3]);
if (mask) {
for (i = 0; i < points; i++) {
if (mask & 1) shell_printf("%u ", frequencies[i]);
if (mask & 2) shell_printf("%f %f ", measured[0][i][0], measured[0][i][1]);
if (mask & 4) shell_printf("%f %f ", measured[1][i][0], measured[1][i][1]);
shell_printf("\r\n");
}
}
}
}
static void
update_marker_index(void)
{
int m;
int i;
for (m = 0; m < MARKERS_MAX; m++) {
if (!markers[m].enabled)
continue;
uint32_t f = markers[m].frequency;
uint32_t fstart = get_sweep_frequency(ST_START);
uint32_t fstop = get_sweep_frequency(ST_STOP);
if (f < fstart) {
markers[m].index = 0;
markers[m].frequency = fstart;
} else if (f >= fstop) {
markers[m].index = sweep_points-1;
markers[m].frequency = fstop;
} else {
for (i = 0; i < sweep_points-1; i++) {
if (frequencies[i] <= f && f < frequencies[i+1]) {
markers[m].index = f < (frequencies[i] / 2 + frequencies[i + 1] / 2) ? i : i + 1;
break;
}
}
}
}
}
static void
set_frequencies(uint32_t start, uint32_t stop, uint16_t points)
{
uint32_t i;
uint32_t step = (points - 1);
uint32_t span = stop - start;
uint32_t delta = span / step;
uint32_t error = span % step;
uint32_t f = start, df = step>>1;
for (i = 0; i <= step; i++, f+=delta) {
frequencies[i] = f;
df+=error;
if (df >=step) {
f++;
df -= step;
}
}
// disable at out of sweep range
for (; i < POINTS_COUNT; i++)
frequencies[i] = 0;
}
static void
update_frequencies(void)
{
uint32_t start, stop;
start = get_sweep_frequency(ST_START);
stop = get_sweep_frequency(ST_STOP);
set_frequencies(start, stop, sweep_points);
// operation_requested|= OP_FREQCHANGE;
update_marker_index();
// set grid layout
update_grid();
}
void
set_sweep_frequency(int type, uint32_t freq)
{
int cal_applied = cal_status & CALSTAT_APPLY;
// Check frequency for out of bounds (minimum SPAN can be any value)
if (type != ST_SPAN && freq < START_MIN)
freq = START_MIN;