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main.c
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main.c
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/*
* 2016-2019 Copyright @edy555, licensed under GPL. https://github.com/ttrftech/NanoVNA
* 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 <shell.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <math.h>
#define START_MIN 10000
#define STOP_MAX 1500000000
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, int16_t points);
static bool sweep(bool break_on_operation);
mutex_t mutex_sweep;
mutex_t mutex_ili9341;
#define DRIVE_STRENGTH_AUTO (-1)
#define FREQ_HARMONICS (config.harmonic_freq_threshold)
#define IS_HARMONIC_MODE(f) ((f) > FREQ_HARMONICS)
static int32_t frequency_offset = 5000;
static uint32_t frequency = 10000000;
static int8_t drive_strength = SI5351_CLK_DRIVE_STRENGTH_8MA;
int8_t sweep_enabled = TRUE;
static int8_t sweep_once = FALSE;
static int8_t cal_auto_interpolate = TRUE;
uint16_t redraw_request = 0; // contains REDRAW_XXX flags
int16_t vbat = 0;
bool pll_lock_failed;
static THD_WORKING_AREA(waThread1, 640);
static THD_FUNCTION(Thread1, arg)
{
chRegSetThreadName("sweep");
while (1) {
bool completed = false;
if (sweep_enabled || sweep_once) {
chMtxLock(&mutex_sweep);
palClearPad(GPIOC, GPIOC_LED); // disable led and wait for voltage stabilization
chThdSleepMilliseconds(10);
completed = sweep(true);
sweep_once = FALSE;
// enable led
palSetPad(GPIOC, GPIOC_LED);
chMtxUnlock(&mutex_sweep);
} else {
__WFI();
}
chMtxLock(&mutex_sweep);
ui_process();
if (sweep_enabled) {
adc_stop(ADC1);
vbat = adc_vbat_read(ADC1);
touch_start_watchdog();
draw_battery_status();
// if (pll_lock_failed) {
// draw_pll_lock_error();
// }
/* calculate trace coordinates and plot only if scan completed */
if (completed) {
plot_into_index(measured);
redraw_request |= REDRAW_CELLS;
}
}
/* plot trace and other indications as raster */
draw_all(completed); // flush markmap only if scan completed to prevent remaining traces
chMtxUnlock(&mutex_sweep);
}
}
static void pause_sweep(void)
{
sweep_enabled = FALSE;
}
static void resume_sweep(void)
{
sweep_enabled = TRUE;
}
void toggle_sweep(void)
{
sweep_enabled = !sweep_enabled;
}
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)
{
if ((domain_mode & DOMAIN_MODE) != DOMAIN_TIME) return; // nothing to do for freq domain
chMtxLock(&mutex_ili9341); // [protect spi_buffer]
// use spi_buffer as temporary buffer
// and calculate ifft for time domain
float* tmp = (float*)spi_buffer;
// correct IFFT window and zero-padding loss
// assuming a 2*POINT_COUNT window
float wincorr = 1.0f;
float beta = 0.0;
switch (domain_mode & TD_WINDOW) {
case TD_WINDOW_MINIMUM:
beta = 0.0; // this is rectangular
// loss by zero-padding 202 to 256 points
wincorr = (float)FFT_SIZE / (float)(2*POINT_COUNT);
break;
case TD_WINDOW_NORMAL:
beta = 6.0;
// additional window loss: 1/mean(kaiser(202,6)) = 2.01
wincorr = (float)FFT_SIZE / (float)(2*POINT_COUNT) * 2.01f;
break;
case TD_WINDOW_MAXIMUM:
beta = 13;
// additional window loss: 1/mean(kaiser(202,13)) = 2.92
wincorr = (float)FFT_SIZE / (float)(2*POINT_COUNT) * 2.92f;
break;
}
uint8_t window_size = POINT_COUNT, offset = 0;
uint8_t is_lowpass = FALSE;
switch (domain_mode & TD_FUNC) {
case TD_FUNC_BANDPASS:
offset = 0;
window_size = POINT_COUNT;
// window size is half the size as assumed above => twice the IFFT loss
wincorr *= 2.0f;
break;
case TD_FUNC_LOWPASS_STEP:
// no IFFT losses need to be considered to calculate the step response
wincorr = 1.0f;
// fall-through
case TD_FUNC_LOWPASS_IMPULSE:
is_lowpass = TRUE;
offset = POINT_COUNT;
window_size = POINT_COUNT * 2;
break;
}
for (int ch = 0; ch < 2; ch++) {
memcpy(tmp, measured[ch], sizeof(measured[0]));
for (int i = 0; i < POINT_COUNT; i++) {
float w = kaiser_window(i+offset, window_size, beta);
tmp[i*2+0] *= w * wincorr;
tmp[i*2+1] *= w * wincorr;
}
#if POINT_COUNT >= FFT_SIZE
#error CHECK ME
#endif
for (int i = POINT_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 < POINT_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 < POINT_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 < POINT_COUNT; i++) {
measured[ch][i][0] += measured[ch][i-1][0];
}
}
}
chMtxUnlock(&mutex_ili9341); // [/protect spi_buffer]
}
static void cmd_pause(BaseSequentialStream *chp, int argc, char *argv[])
{
(void)chp;
(void)argc;
(void)argv;
pause_sweep();
}
static void cmd_resume(BaseSequentialStream *chp, int argc, char *argv[])
{
(void)chp;
(void)argc;
(void)argv;
// restore frequencies array and cal
chMtxLock(&mutex_sweep);
update_frequencies();
if (cal_auto_interpolate && (cal_status & CALSTAT_APPLY))
cal_interpolate(lastsaveid);
chMtxUnlock(&mutex_sweep);
resume_sweep();
}
static void cmd_reset(BaseSequentialStream *chp, int argc, char *argv[])
{
(void)argc;
(void)argv;
if (argc == 1) {
if (strcmp(argv[0], "dfu") == 0) {
chprintf(chp, "Performing reset to DFU mode\r\n");
enter_dfu();
return;
}
}
chprintf(chp, "Performing reset\r\n");
rccEnableWWDG(FALSE);
WWDG->CFR = 0x60;
WWDG->CR = 0xff;
/* wait forever */
while (1)
;
}
# if 0
static const int8_t gain_table[][2] = {
{ 0, 0 }, // 1st: 0 ~ 300MHz
{ 42, 40 }, // 2nd: 300 ~ 600MHz
{ 52, 50 }, // 3rd: 600 ~ 900MHz
{ 80, 78 }, // 4th: 900 ~ 1200MHz
{ 90, 88 }, // 5th: 1200 ~ 1400MHz
{ 95, 93 }, // 6th: 1400MHz ~
};
# endif
//NanoVNA-H REV3.4
static const int8_t gain_table[][2] = {
{ 0, 0 }, // 1st: 0 ~ 300MHz
{ 50, 50 }, // 2nd: 300 ~ 600MHz
{ 55, 55 }, // 3rd: 600 ~ 900MHz
{ 75, 75 }, // 4th: 900 ~ 1200MHz
{ 80, 80 }, // 5th: 1200 ~ 1500MHz
// { 90, 90 }, // 6th: 1500MHz ~1800MHz
// { 95, 95 }, // 7th: 1800MHz ~
};
static int adjust_gain(int newfreq)
{
int delay = 0;
int new_order = (newfreq-1) / FREQ_HARMONICS; //Harmonics are switched after an integer multiple, and then the gain needs to be switched after an integer multiple.
int old_order = (frequency-1) / FREQ_HARMONICS;
if (new_order != old_order) {
tlv320aic3204_set_gain(gain_table[new_order][0], gain_table[new_order][1]);
delay += 10;
}
return delay;
}
static int set_frequency(uint32_t freq)
{
int delay = 0;
if (frequency == freq)
return delay;
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_with_offset(freq, frequency_offset, ds);
frequency = freq;
return delay;
}
static void cmd_offset(BaseSequentialStream *chp, int argc, char *argv[])
{
if (argc != 1) {
chprintf(chp, "usage: offset {frequency offset(Hz)}\r\n");
return;
}
chMtxLock(&mutex_sweep);
frequency_offset = atoi(argv[0]);
set_frequency(frequency);
chMtxUnlock(&mutex_sweep);
}
static void cmd_freq(BaseSequentialStream *chp, int argc, char *argv[])
{
int freq;
if (argc != 1) {
chprintf(chp, "usage: freq {frequency(Hz)}\r\n");
return;
}
pause_sweep();
chMtxLock(&mutex_sweep);
freq = atoi(argv[0]);
set_frequency(freq);
chMtxUnlock(&mutex_sweep);
}
static void cmd_power(BaseSequentialStream *chp, int argc, char *argv[])
{
if (argc != 1) {
chprintf(chp, "usage: power {0-3|-1}\r\n");
return;
}
drive_strength = atoi(argv[0]);
chMtxLock(&mutex_sweep);
set_frequency(frequency);
chMtxUnlock(&mutex_sweep);
}
#ifdef __CMD_TIME__
static void cmd_time(BaseSequentialStream *chp, int argc, char *argv[])
{
RTCDateTime timespec;
(void)argc;
(void)argv;
rtcGetTime(&RTCD1, ×pec);
chprintf(chp, "%d/%d/%d %d\r\n", timespec.year+1980, timespec.month, timespec.day, timespec.millisecond);
}
#endif
#ifdef __DAC__
static void cmd_dac(BaseSequentialStream *chp, int argc, char *argv[])
{
int value;
if (argc != 1) {
chprintf(chp, "usage: dac {value(0-4095)}\r\n");
chprintf(chp, "current value: %d\r\n", config.dac_value);
return;
}
value = atoi(argv[0]);
config.dac_value = value;
dacPutChannelX(&DACD2, 0, value);
}
#endif
static void cmd_threshold(BaseSequentialStream *chp, int argc, char *argv[])
{
int value;
if (argc != 1) {
chprintf(chp, "usage: threshold {frequency in harmonic mode}\r\n");
chprintf(chp, "current: %d\r\n", config.harmonic_freq_threshold);
return;
}
value = atoi(argv[0]);
chMtxLock(&mutex_sweep);
config.harmonic_freq_threshold = value;
chMtxUnlock(&mutex_sweep);
}
static void cmd_saveconfig(BaseSequentialStream *chp, int argc, char *argv[])
{
(void)argc;
(void)argv;
config_save();
chprintf(chp, "Config saved.\r\n");
}
static void cmd_clearconfig(BaseSequentialStream *chp, int argc, char *argv[])
{
if (argc != 1) {
chprintf(chp, "usage: clearconfig {protection key}\r\n");
return;
}
if (strcmp(argv[0], "1234") != 0) {
chprintf(chp, "Key unmatched.\r\n");
return;
}
chMtxLock(&mutex_sweep); // TODO: separate mutex?
clear_all_config_prop_data();
chMtxUnlock(&mutex_sweep);
chprintf(chp, "Config and all cal data cleared.\r\n");
// chprintf(chp, "WARNING: Do reset manually to take effect.\r\n");
}
static struct {
int16_t rms[2];
int16_t ave[2];
int callback_count;
// int32_t last_counter_value;
// int32_t interval_cycles;
// int32_t busy_cycles;
} stat;
static int16_t rx_buffer[AUDIO_BUFFER_LEN * 2];
#ifdef __DUMP_CMD__
int16_t dump_buffer[AUDIO_BUFFER_LEN];
int16_t dump_selection = 0;
#endif
static volatile int16_t wait_count = 0;
float measured[2][POINT_COUNT][2];
static void wait_dsp(int count)
{
wait_count = count;
//reset_dsp_accumerator();
while (wait_count)
__WFI();
}
#ifdef __DUMP_CMD__
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
static 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 > 0) {
if (wait_count == 1)
dsp_process(p, n);
#ifdef __DUMP_CMD__
duplicate_buffer_to_dump(p);
#endif
--wait_count;
}
#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 = {
.tx_buffer = NULL, // TX Buffer
.rx_buffer = rx_buffer, // RX Buffer
.size = AUDIO_BUFFER_LEN * 2,
.tx_end_cb = NULL, // tx callback
.rx_end_cb = i2s_end_callback, // rx callback
.i2scfgr = 0, // i2scfgr
.i2spr = 2 // i2spr
};
static void cmd_data(BaseSequentialStream *chp, int argc, char *argv[])
{
int sel = 0;
if (argc == 1)
sel = atoi(argv[0]);
if (sel < 0 || sel > 6) {
chprintf(chp, "usage: data [array]\r\n");
} else {
if (sel > 1)
sel = sel-2;
chMtxLock(&mutex_sweep);
for (int i = 0; i < sweep_points; i++) {
#ifndef __USE_STDIO__
// WARNING: chprintf doesn't support proper float formatting
chprintf(chp, "%f %f\r\n", measured[sel][i][0], measured[sel][i][1]);
#else
// printf floating point losslessly: float="%.9g", double="%.17g"
char tmpbuf[20];
int leng;
leng = snprintf(tmpbuf, sizeof(tmpbuf), "%.9g", measured[sel][i][0]);
for (int j=0; j < leng; j++) {
streamPut(chp, (uint8_t)tmpbuf[j]);
}
streamPut(chp, (uint8_t)' ');
leng = snprintf(tmpbuf, sizeof(tmpbuf), "%.9g", measured[sel][i][1]);
for (int j=0; j < leng; j++) {
streamPut(chp, (uint8_t)tmpbuf[j]);
}
streamPut(chp, (uint8_t)'\r');
streamPut(chp, (uint8_t)'\n');
#endif // __USE_STDIO__
}
chMtxUnlock(&mutex_sweep);
}
}
#ifdef __DUMP_CMD__
static void cmd_dump(BaseSequentialStream *chp, int argc, char *argv[])
{
int i, j;
int len;
if (argc == 1)
dump_selection = 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++) {
chprintf(chp, "%04x ", 0xffff & (int)dump_buffer[i]);
}
chprintf(chp, "\r\n");
}
}
#endif
static void cmd_capture(BaseSequentialStream *chp, int argc, char *argv[])
{
// read pixel count at one time (PART*2 bytes required for read buffer)
#define PART 960
chMtxLock(&mutex_ili9341); // [capture display + spi_buffer]
// use uint16_t spi_buffer[1024] (defined in ili9341) for read buffer
uint16_t *buf = &spi_buffer[0];
int len = 320 * 240;
int i;
ili9341_read_memory(0, 0, 320, 240, PART, buf);
for (i = 0; i < PART; i++) {
streamPut(chp, buf[i] >> 8);
streamPut(chp, buf[i] & 0xff);
}
len -= PART;
while (len > 0) {
ili9341_read_memory_continue(PART, buf);
for (i = 0; i < PART; i++) {
streamPut(chp, buf[i] >> 8);
streamPut(chp, buf[i] & 0xff);
}
len -= PART;
}
chMtxUnlock(&mutex_ili9341); // [/capture display + spi_buffer]
}
//static void cmd_gamma(BaseSequentialStream *chp, int argc, char *argv[])
//{
// float gamma[2];
// (void)argc;
// (void)argv;
//
// pause_sweep();
// chMtxLock(&mutex_sweep);
// wait_dsp(4);
// calculate_gamma(gamma);
// chMtxUnlock(&mutex_sweep);
//
// chprintf(chp, "%d %d\r\n", gamma[0], gamma[1]);
//}
static void (*sample_func)(float *gamma) = calculate_gamma;
static void cmd_sample(BaseSequentialStream *chp, int argc, char *argv[])
{
if (argc == 1) {
if (strcmp(argv[0], "ref") == 0) {
sample_func = fetch_amplitude_ref;
return;
} else if (strcmp(argv[0], "ampl") == 0) {
sample_func = fetch_amplitude;
return;
} else if (strcmp(argv[0], "gamma") == 0) {
sample_func = calculate_gamma;
return;
}
}
chprintf(chp, "usage: sample {gamma|ampl|ref}\r\n");
}
#if 0
int32_t frequency0 = 1000000;
int32_t frequency1 = 300000000;
int16_t sweep_points = POINT_COUNT;
uint32_t frequencies[POINT_COUNT];
uint16_t cal_status;
float cal_data[5][POINT_COUNT][2];
#endif
config_t config = {
.magic = CONFIG_MAGIC,
#ifdef __DAC__
.dac_value = 1922,
#endif
.grid_color = 0x1084,
.menu_normal_color = 0xffff,
.menu_active_color = 0x7777,
.trace_color = { RGBHEX(0xffe31f), RGBHEX(0x00bfe7), RGBHEX(0x1fe300), RGBHEX(0xe7079f) },
.touch_cal = { 370, 540, 154, 191 }, //{ 620, 600, 160, 190 },
.default_loadcal = 0,
.harmonic_freq_threshold = 300000000,
.vbat_offset = 480,
.checksum = 0
};
properties_t current_props = {
.magic = CONFIG_MAGIC,
._frequency0 = 50000, // start = 50kHz
._frequency1 = 900000000, // end = 900MHz
._sweep_points = POINT_COUNT,
._cal_status = 0,
//._frequencies = {},
//._cal_data = {},
._electrical_delay = 0,
._trace = /*[4] */
{/*enable, type, channel, polar, scale, refpos*/
{ 1, TRC_LOGMAG, 0, 0, 1.0, 7.0 },
{ 1, TRC_LOGMAG, 1, 0, 1.0, 7.0 },
{ 1, TRC_SMITH, 0, 1, 1.0, 0.0 },
{ 1, TRC_PHASE, 1, 0, 1.0, 4.0 }
},
._markers = /*[4] */ {
{ 1, 30, 0 }, { 0, 40, 0 }, { 0, 60, 0 }, { 0, 80, 0 }
},
._active_marker = 0,
._domain_mode = 0,
._velocity_factor = 70,
.checksum = 0
};
properties_t *active_props = ¤t_props;
static 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;
}
// main loop for measurement
static bool sweep(bool break_on_operation)
{
pll_lock_failed = false;
for (int i = 0; i < sweep_points; i++) {
int delay = set_frequency(frequencies[i]);
delay = delay < 3 ? 3 : delay;
delay = delay > 8 ? 8 : delay;
tlv320aic3204_select(0); // CH0:REFLECT
wait_dsp(delay);
/* calculate reflection coeficient */
(*sample_func)(measured[0][i]);
tlv320aic3204_select(1); // CH1:TRANSMISSION
wait_dsp(delay);
/* calculate transmission coeficient */
(*sample_func)(measured[1][i]);
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;
}
transform_domain();
return true;
}
#ifdef __SCANRAW_CMD__
static void measure_gamma_avg(uint8_t channel, uint32_t freq, uint16_t avg_count, float* gamma) {
int delay = set_frequency(freq);
delay = delay < 3 ? 3 : delay;
delay = delay > 8 ? 8 : delay;
tlv320aic3204_select(channel);
wait_dsp(delay);
gamma[0] = 0.0;
gamma[1] = 0.0;
float gamma_acc[2] = { 0, 0 };
for (int j = 0; j < avg_count; j++) {
wait_dsp(1);
/* calculate reflection/transmission coeficient */
(*sample_func)(gamma);
if (avg_count == 1) break;
gamma_acc[0] += gamma[0];
gamma_acc[1] += gamma[1];
}
if (avg_count > 1) {
gamma[0] = gamma_acc[0] / avg_count;
gamma[1] = gamma_acc[1] / avg_count;
}
}
static void cmd_scanraw(BaseSequentialStream *chp, int argc, char *argv[])
{
int32_t chan, freq, step, count, avg_count;
if (argc != 4 && argc != 5) {
chprintf(chp, "usage: scanraw {channel(0|1)} {start(Hz)} {stEp(Hz)} {count} [average]\r\n");
return;
}
chan = atoi(argv[0]);
freq = atoi(argv[1]);
step = atoi(argv[2]);
count = atoi(argv[3]);
avg_count = 1;
if (argc == 5)
avg_count = atoi(argv[4]);
if (chan < 0 || chan > 1) {
chprintf(chp, "error: invalid channel\r\n");
return;
}
if (freq < START_MIN ||
(freq+(uint64_t)step*count) < START_MIN ||
(freq+(uint64_t)step*count) > STOP_MAX) {
chprintf(chp, "error: invalid frequency range\r\n");
return;
}
if (avg_count < 1 || avg_count > 1000) {
chprintf(chp, "error: invalid average\r\n");
return;
}
chMtxLock(&mutex_sweep);
palClearPad(GPIOC, GPIOC_LED); // disable led and wait for voltage stabilization
chThdSleepMilliseconds(10);
for (int i = 0; i < count; i++, freq += step) {
float gamma[2];
measure_gamma_avg(chan, freq, avg_count, gamma);
#ifndef __USE_STDIO__
// WARNING: chprintf doesn't support proper float formatting
chprintf(chp, "%f\t%f\r\n", gamma[0], gamma[1]);
#else
// printf floating point losslessly: float="%.9g", double="%.17g"
char tmpbuf[20];
int leng;
leng = snprintf(tmpbuf, sizeof(tmpbuf), "%.9g", gamma[0]);
for (int j=0; j < leng; j++) {
streamPut(chp, (uint8_t)tmpbuf[j]);
}
streamPut(chp, (uint8_t)'\t');
leng = snprintf(tmpbuf, sizeof(tmpbuf), "%.9g", gamma[1]);
for (int j=0; j < leng; j++) {
streamPut(chp, (uint8_t)tmpbuf[j]);
}
streamPut(chp, (uint8_t)'\r');
streamPut(chp, (uint8_t)'\n');
#endif // __USE_STDIO__
}
chMtxUnlock(&mutex_sweep);
}
#endif //__SCANRAW_CMD__
static void cmd_scan(BaseSequentialStream *chp, int argc, char *argv[])
{
int32_t start, stop;
int16_t points = sweep_points;
if (argc != 2 && argc != 3) {
chprintf(chp, "usage: scan {start(Hz)} {stop(Hz)} [points]\r\n");
return;
}
start = atoi(argv[0]);
stop = atoi(argv[1]);
if (start == 0 || stop == 0 || start > stop) {
chprintf(chp, "frequency range is invalid\r\n");
return;
}
if (argc == 3) {
points = atoi(argv[2]);
if (points <= 0 || points > sweep_points) {
chprintf(chp, "sweep points exceeds range\r\n");
return;
}
}
pause_sweep();
chMtxLock(&mutex_sweep);
set_frequencies(start, stop, points);
if (cal_auto_interpolate && (cal_status & CALSTAT_APPLY))
cal_interpolate(lastsaveid);
sweep_once = TRUE;
chMtxUnlock(&mutex_sweep);
// wait finishing sweep
while (sweep_once)
chThdSleepMilliseconds(10);
}
static void update_marker_index(void)
{
int m;
int i;
for (m = 0; m < MARKER_COUNT; m++) {
if (!markers[m].enabled)
continue;
uint32_t f = markers[m].frequency;
if (f < frequencies[0]) {
markers[m].index = 0;
markers[m].frequency = frequencies[0];
} else if (f >= frequencies[sweep_points-1]) {
markers[m].index = sweep_points-1;
markers[m].frequency = frequencies[sweep_points-1];
} else {
for (i = 0; i < sweep_points-1; i++) {
if (frequencies[i] <= f && f < frequencies[i+1]) {
uint32_t mid = (frequencies[i] + frequencies[i+1])/2;
if (f < mid) {
markers[m].index = i;
} else {
markers[m].index = i + 1;
}
break;
}
}
}
}
}
static void set_frequencies(uint32_t start, uint32_t stop, int16_t points)
{
chMtxLock(&mutex_sweep);
uint32_t i;
uint32_t span = stop - start;
for (i = 0; i < points; i++) {
uint32_t offset = (uint32_t)((i * (uint64_t)span) / (points - 1));
frequencies[i] = start + (uint32_t)offset;
}
// disable at out of sweep range
for (; i < sweep_points; i++)
frequencies[i] = 0;
chMtxUnlock(&mutex_sweep);
}
static void update_frequencies(void)
{
chMtxLock(&mutex_sweep);
uint32_t start, stop;
if (frequency1 > 0) {
start = frequency0;
stop = frequency1;
} else {
int32_t center = frequency0;
int32_t span = -frequency1;
start = center - span/2;
stop = center + span/2;
}
set_frequencies(start, stop, sweep_points);
operation_requested = OP_FREQCHANGE;
update_marker_index();
// set grid layout
update_grid();
chMtxUnlock(&mutex_sweep);
}
static void freq_mode_startstop(void)
{
if (frequency1 <= 0) {
int center = frequency0;
int span = -frequency1;
ensure_edit_config();
frequency0 = center - span/2;
frequency1 = center + span/2;
}
}
static void freq_mode_centerspan(void)
{
if (frequency1 > 0) {
int start = frequency0;
int stop = frequency1;
ensure_edit_config();
frequency0 = (start + stop)/2; // center
frequency1 = -(stop - start); // span
}
}
void set_sweep_frequency(int type, int32_t freq)
{
chMtxLock(&mutex_sweep);
int32_t center;
int32_t span;
int cal_applied = cal_status & CALSTAT_APPLY;
switch (type) {
case ST_START:
ensure_edit_config();
freq_mode_startstop();
if (freq < START_MIN)
freq = START_MIN;
if (freq > STOP_MAX)
freq = STOP_MAX;
frequency0 = freq;
// if start > stop then make start = stop
if (frequency1 < freq)
frequency1 = freq;
update_frequencies();
break;
case ST_STOP:
ensure_edit_config();
freq_mode_startstop();
if (freq > STOP_MAX)
freq = STOP_MAX;
if (freq < START_MIN)
freq = START_MIN;
frequency1 = freq;
// if start > stop then make start = stop
if (frequency0 > freq)
frequency0 = freq;
update_frequencies();
break;
case ST_CENTER:
ensure_edit_config();
freq_mode_centerspan();
if (freq > STOP_MAX)
freq = STOP_MAX;
if (freq < START_MIN)
freq = START_MIN;