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plot.c
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plot.c
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/*
* Copyright (c) 2019-2020, Dmitry (DiSlord) [email protected]
* Based on TAKAHASHI Tomohiro (TTRFTECH) [email protected]
* 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 <string.h>
#include "ch.h"
#include "hal.h"
#include "chprintf.h"
#include "nanovna.h"
static void cell_draw_marker_info(int x0, int y0);
static void draw_battery_status(void);
static void draw_cal_status(void);
static void draw_frequencies(void);
static int cell_printf(int16_t x, int16_t y, const char *fmt, ...);
static void markmap_all_markers(void);
static int16_t grid_offset;
static int16_t grid_width;
static uint16_t redraw_request = 0; // contains REDRAW_XXX flags
static uint16_t area_width = AREA_WIDTH_NORMAL;
static uint16_t area_height = AREA_HEIGHT_NORMAL;
// Cell render use spi buffer
static pixel_t *cell_buffer;
// indicate dirty cells (not redraw if cell data not changed)
#define MAX_MARKMAP_X ((LCD_WIDTH+CELLWIDTH-1)/CELLWIDTH)
#define MAX_MARKMAP_Y ((LCD_HEIGHT+CELLHEIGHT-1)/CELLHEIGHT)
// Define markmap mask size
#if MAX_MARKMAP_X <= 8
typedef uint8_t map_t;
#elif MAX_MARKMAP_X <= 16
typedef uint16_t map_t;
#elif MAX_MARKMAP_X <= 32
typedef uint32_t map_t;
#endif
static map_t markmap[MAX_MARKMAP_Y];
// Trace data cache, for faster redraw cells
typedef struct {
uint16_t x;
uint16_t y;
} index_t;
static index_t trace_index[TRACE_INDEX_COUNT][SWEEP_POINTS_MAX];
#if 1
// All used in plot v > 0
#define float2int(v) ((int)((v)+0.5f))
#else
static int
float2int(float v)
{
if (v < 0) return v - 0.5;
if (v > 0) return v + 0.5;
return 0;
}
#endif
static inline int
circle_inout(int x, int y, int r)
{
int d = x*x + y*y;
if (d < r*r - r) return 1; // in circle
if (d > r*r + r) return -1; // out circle
return 0; // on circle
}
static bool
polar_grid(int x, int y)
{
uint32_t d = x*x + y*y;
if (d > P_RADIUS*P_RADIUS + P_RADIUS) return 0;
if (d > P_RADIUS*P_RADIUS - P_RADIUS) return 1;
// vertical and horizontal axis
if (x == 0 || y == 0) return 1;
if (d < P_RADIUS*P_RADIUS/25 - P_RADIUS/5) return 0;
if (d < P_RADIUS*P_RADIUS/25 + P_RADIUS/5) return 1;
if (d < P_RADIUS*P_RADIUS*4/25 - P_RADIUS*2/5) return 0;
if (d < P_RADIUS*P_RADIUS*4/25 + P_RADIUS*2/5) return 1;
// cross sloping lines
if (x == y || x == -y) return 1;
if (d < P_RADIUS*P_RADIUS*9/25 - P_RADIUS*3/5) return 0;
if (d < P_RADIUS*P_RADIUS*9/25 + P_RADIUS*3/5) return 1;
if (d < P_RADIUS*P_RADIUS*16/25 - P_RADIUS*4/5) return 0;
if (d < P_RADIUS*P_RADIUS*16/25 + P_RADIUS*4/5) return 1;
return 0;
}
static void
cell_polar_grid(int x0, int y0, int w, int h, pixel_t color)
{
int x, y;
// offset to center
x0 -= P_CENTER_X;
y0 -= P_CENTER_Y;
for (y = 0; y < h; y++)
for (x = 0; x < w; x++)
if (polar_grid(x + x0, y + y0)) cell_buffer[y * CELLWIDTH + x] = color;
}
/*
* Render Smith grid (if mirror by x possible get Admittance grid)
*/
static bool
smith_grid(int x, int y)
{
#if 0
int d;
// outer circle
d = circle_inout(x, y, P_RADIUS);
if (d < 0) return 0;
if (d == 0) return 1;
// horizontal axis
if (y == 0) return 1;
if (y < 0) y = -y; // mirror by y axis
if (x >= 0) { // valid only if x >= 0
if (x >= P_RADIUS/2){ // valid only if x >= P_RADIUS/2
// Constant Reactance Circle: 2j : R/2 = P_RADIUS/2 (mirror by y)
if (circle_inout(x - P_RADIUS, y - P_RADIUS/2, P_RADIUS/2) == 0) return 1;
// Constant Resistance Circle: 3 : R/4 = P_RADIUS/4
d = circle_inout(x - 3*P_RADIUS/4, y, P_RADIUS/4);
if (d > 0) return 0;
if (d == 0) return 1;
}
// Constant Reactance Circle: 1j : R = P_RADIUS (mirror by y)
d = circle_inout(x - P_RADIUS, y - P_RADIUS, P_RADIUS);
if (d == 0) return 1;
// Constant Resistance Circle: 1 : R/2
d = circle_inout(x - P_RADIUS/2, y, P_RADIUS/2);
if (d > 0) return 0;
if (d == 0) return 1;
}
// Constant Reactance Circle: 1/2j : R*2 (mirror by y)
if (circle_inout(x - P_RADIUS, y - P_RADIUS*2, P_RADIUS*2) == 0) return 1;
// Constant Resistance Circle: 1/3 : R*3/4
if (circle_inout(x - P_RADIUS/4, y, P_RADIUS*3/4) == 0) return 1;
return 0;
#else
uint16_t r = P_RADIUS;
// outer circle
uint32_t _r = x*x + y*y;
int32_t d = _r;
if (d > r*r + r) return 0;
if (d > r*r - r) return 1; // 1
// horizontal axis
if (y == 0) return 1;
if (y < 0) y = -y; // mirror by y axis
uint32_t r_y = r*y;
if (x >= 0) { // valid only if x >= 0
if (x >= r/2){
// Constant Reactance Circle: 2j : R/2 = P_RADIUS/2 (mirror by y)
d = _r - 2*r*x - r_y + r*r + r/2;
if ((uint32_t)d <= r) return 1; // 2
// Constant Resistance Circle: 3 : R/4 = P_RADIUS/4
d = _r - (3*r/2)*x + r*r/2 + r/4;
if (d < 0) return 0;
if (d <= r/2) return 1; // 3
}
// Constant Reactance Circle: 1j : R = P_RADIUS (mirror by y)
d = _r - 2*r*x - 2*r_y + r*r + r;
if ((uint32_t)d<=2*r) return 1; // 4
// Constant Resistance Circle: 1 : R/2
d = _r - r*x + r/2;
if (d < 0) return 0;
if (d <= r) return 1; // 5
}
// Constant Reactance Circle: 1/2j : R*2 (mirror by y)
d = _r - 2*r*x - 4*r_y + r*r + r*2;
if ((uint32_t) d<= r*4) return 1; // 6
// Constant Resistance Circle: 1/3 : R*3/4
d = _r - x*(r/2) - r*r/2 + r*3/4;
if ((uint32_t)d<=r*3/2) return 1; // 7
return 0;
#endif
}
static void
cell_smith_grid(int x0, int y0, int w, int h, pixel_t color)
{
int x, y;
// offset to center
x0-= P_CENTER_X;
y0-= P_CENTER_Y;
for (y = 0; y < h; y++)
for (x = 0; x < w; x++)
if (smith_grid(x + x0, y + y0)) cell_buffer[y * CELLWIDTH + x] = color;
}
static void
cell_admit_grid(int x0, int y0, int w, int h, pixel_t color)
{
int x, y;
// offset to center
x0 = P_CENTER_X - x0;
y0-= P_CENTER_Y;
for (y = 0; y < h; y++)
for (x = 0; x < w; x++)
if (smith_grid(- x + x0, y + y0)) cell_buffer[y * CELLWIDTH + x] = color;
}
void update_grid(void)
{
freq_t fstart = get_sweep_frequency(ST_START);
freq_t fspan = get_sweep_frequency(ST_SPAN);
freq_t grid;
if (fspan < 1000) {
grid_offset = 0;
grid_width = 0;
} else {
freq_t gdigit = 100000000;
while (gdigit > 100) {
grid = 5 * gdigit;
if (fspan / grid >= 4) break;
grid = 2 * gdigit;
if (fspan / grid >= 4) break;
grid = gdigit;
if (fspan / grid >= 4) break;
gdigit /= 10;
}
grid_offset = (WIDTH) * ((fstart % grid) / 100) / (fspan / 100);
grid_width = (WIDTH) * (grid / 100) / (fspan / 1000);
}
}
static inline int
rectangular_grid_x(int x)
{
x -= CELLOFFSETX;
if ((uint32_t)x > WIDTH) return 0;
if ((((x + grid_offset) * 10) % grid_width) < 10 || x == 0 || x == WIDTH)
return 1;
return 0;
}
static inline int
rectangular_grid_y(int y)
{
if (y < 0 || (y % GRIDY))
return 0;
return 1;
}
//**************************************************************************************
// NanoVNA measures
// This functions used for plot traces, and markers data output
// Also can used in measure calculations
//**************************************************************************************
#ifdef __VNA_Z_RENORMALIZATION__
#define PORT_Z current_props._portz
#else
#define PORT_Z 50.0f
#endif
// Help functions
static float get_l(float re, float im) {return (re*re + im*im);}
static float get_w(int i) {return 2 * VNA_PI * getFrequency(i);}
static float get_s11_r(float re, float im, float z) {return vna_fabsf(2.0f * z * re / get_l(re, im) - z);}
static float get_s21_r(float re, float im, float z) {return 1.0f * z * re / get_l(re, im) - z;}
static float get_s11_x(float re, float im, float z) {return -2.0f * z * im / get_l(re, im);}
static float get_s21_x(float re, float im, float z) {return -1.0f * z * im / get_l(re, im);}
//**************************************************************************************
// LINEAR = |S|
//**************************************************************************************
static float linear(int i, const float *v) {
(void) i;
return vna_sqrtf(get_l(v[0], v[1]));
}
//**************************************************************************************
// LOGMAG = 20*log10f(|S|)
//**************************************************************************************
static float logmag(int i, const float *v) {
(void) i;
// return log10f(get_l(v[0], v[1])) * 10.0f;
// return vna_logf(get_l(v[0], v[1])) * (10.0f / logf(10.0f));
return vna_log10f_x_10(get_l(v[0], v[1]));
}
//**************************************************************************************
// PHASE angle in degree = atan2(im, re) * 180 / PI
//**************************************************************************************
static float phase(int i, const float *v) {
(void) i;
return (180.0f / VNA_PI) * vna_atan2f(v[1], v[0]);
}
//**************************************************************************************
// Group delay
//**************************************************************************************
static float groupdelay(const float *v, const float *w, uint32_t deltaf) {
#if 1
// atan(w)-atan(v) = atan((w-v)/(1+wv)), for complex v and w result q = v / w
float r = w[0]*v[0] + w[1]*v[1];
float i = w[0]*v[1] - w[1]*v[0];
return vna_atan2f(i, r) / (2 * VNA_PI * deltaf);
#else
return (vna_atan2f(w[0], w[1]) - vna_atan2f(v[0], v[1])) / (2 * VNA_PI * deltaf);
#endif
}
//**************************************************************************************
// REAL
//**************************************************************************************
static float real(int i, const float *v) {
(void) i;
return v[0];
}
//**************************************************************************************
// IMAG
//**************************************************************************************
static float imag(int i, const float *v) {
(void) i;
return v[1];
}
//**************************************************************************************
// SWR = (1 + |S|)/(1 - |S|)
//**************************************************************************************
static float swr(int i, const float *v) {
(void) i;
float x = linear(i, v);
if (x > 0.99f)
return INFINITY;
return (1 + x)/(1 - x);
}
//**************************************************************************************
// Z parameters calculations from complex S
// Z = z0 * (1 + S) / (1 - S) = R + jX
// |Z| = sqrtf(R*R+X*X)
// Resolve this in complex give:
// let S` = 1 - S => re` = 1 - re and im` = -im
// l` = re` * re` + im` * im`
// Z = z0 * (2 - S`) / S` = z0 * 2 / S` - z0
// R = z0 * 2 * re` / l` - z0
// X =-z0 * 2 * im` / l`
// |Z| = z0 * sqrt(4 * re / l` + 1)
// Z phase = atan(X, R)
//**************************************************************************************
static float resistance(int i, const float *v) {
(void) i;
return get_s11_r(1.0f - v[0], -v[1], PORT_Z);
}
static float reactance(int i, const float *v) {
(void) i;
return get_s11_x(1.0f - v[0], -v[1], PORT_Z);
}
static float mod_z(int i, const float *v) {
(void) i;
const float z0 = PORT_Z;
const float l = get_l(1.0f - v[0], v[1]);
return z0 * vna_sqrtf(4.0f * v[0] / l + 1.0f); // always >= 0
}
static float phase_z(int i, const float *v) {
(void) i;
const float r = 1.0f - get_l(v[0], v[1]);
const float x = 2.0f * v[1];
return (180.0f / VNA_PI) * vna_atan2f(x, r);
}
//**************************************************************************************
// Use w = 2 * pi * frequency
// Get Series L and C from X
// C = -1 / (w * X)
// L = X / w
//**************************************************************************************
static float series_c(int i, const float *v) {
const float zi = reactance(i, v);
const float w = get_w(i);
return -1.0f / (w * zi);
}
static float series_l(int i, const float *v) {
const float zi = reactance(i, v);
const float w = get_w(i);
return zi / w;
}
//**************************************************************************************
// Q factor = abs(X / R)
// Q = 2 * im / (1 - re * re - im * im)
//**************************************************************************************
static float qualityfactor(int i, const float *v) {
(void) i;
const float r = 1.0f - get_l(v[0], v[1]);
const float x = 2.0f * v[1];
return vna_fabsf(x / r);
}
//**************************************************************************************
// Y parameters (conductance and susceptance) calculations from complex S
// Y = (1 / z0) * (1 - S) / (1 + S) = G + jB
// Resolve this in complex give:
// let S` = 1 + S => re` = 1 + re and im` = im
// l` = re` * re` + im` * im`
// z0` = (1 / z0)
// Y = z0` * (2 - S`) / S` = 2 * z0` / S` - z0`
// G = 2 * z0` * re` / l` - z0`
// B = -2 * z0` * im` / l`
// |Y| = 1 / |Z|
//**************************************************************************************
static float conductance(int i, const float *v) {
(void) i;
return get_s11_r(1.0f + v[0], v[1], 1.0f / PORT_Z);
}
static float susceptance(int i, const float *v) {
(void) i;
return get_s11_x(1.0f + v[0], v[1], 1.0f / PORT_Z);
}
//**************************************************************************************
// Parallel R and X calculations from Y
// Rp = 1 / G
// Xp =-1 / B
//**************************************************************************************
static float parallel_r(int i, const float *v) {
#if 1
return 1.0f / conductance(i, v);
#else
(void) i;
const float re = 1.0f + v[0], im = v[1];
const float z0 = PORT_Z;
const float l = get_l(re, im);
return z0 * l / (2.0f * re - l);
#endif
}
static float parallel_x(int i, const float *v) {
#if 1
return -1.0f / susceptance(i, v);
#else
(void) i;
const float z0 = PORT_Z;
return z0 * get_l(1.0f + v[0], v[1]) / (2.0f * v[1]);
#endif
}
//**************************************************************************************
// Use w = 2 * pi * frequency
// Get Parallel L and C from B
// C = B / w
// L = -1 / (w * B) = Xp / w
//**************************************************************************************
static float parallel_c(int i, const float *v) {
const float yi = susceptance(i, v);
const float w = get_w(i);
return yi / w;
}
static float parallel_l(int i, const float *v) {
const float xp = parallel_x(i, v);
const float w = get_w(i);
return xp / w;
}
static float mod_y(int i, const float *v) {
return 1.0f / mod_z(i, v); // always >= 0
}
//**************************************************************************************
// S21 series and shunt
// S21 shunt Z = 0.5f * z0 * S / (1 - S)
// replace S` = (1 - S)
// S21 shunt Z = 0.5f * z0 * (1 - S`) / S`
// S21 series Z = 2.0f * z0 * (1 - S ) / S
// Q21 = im / re
//**************************************************************************************
static float s21shunt_r(int i, const float *v) {
(void) i;
return get_s21_r(1.0f - v[0], -v[1], 0.5f * PORT_Z);
}
static float s21shunt_x(int i, const float *v) {
(void) i;
return get_s21_x(1.0f - v[0], -v[1], 0.5f * PORT_Z);
}
static float s21shunt_z(int i, const float *v) {
(void) i;
float l1 = get_l(v[0], v[1]);
float l2 = get_l(1.0f - v[0], v[1]);
return 0.5f * PORT_Z * vna_sqrtf(l1 / l2);
}
static float s21series_r(int i, const float *v) {
(void) i;
return get_s21_r(v[0], v[1], 2.0f * PORT_Z);
}
static float s21series_x(int i, const float *v) {
(void) i;
return get_s21_x(v[0], v[1], 2.0f * PORT_Z);
}
static float s21series_z(int i, const float *v) {
(void) i;
float l1 = get_l(v[0], v[1]);
float l2 = get_l(1.0f - v[0], v[1]);
return 2.0f * PORT_Z * vna_sqrtf(l2 / l1);
}
static float s21_qualityfactor(int i, const float *v) {
(void) i;
return vna_fabsf(v[1] / (v[0] - get_l(v[0], v[1])));
}
//**************************************************************************************
// Group delay
//**************************************************************************************
float groupdelay_from_array(int i, const float *v) {
int bottom = (i == 0) ? 0 : -1; // get prev point
int top = (i == sweep_points-1) ? 0 : 1; // get next point
freq_t deltaf = get_sweep_frequency(ST_SPAN) / ((sweep_points - 1) / (top - bottom));
return groupdelay(&v[2*bottom], &v[2*top], deltaf);
}
static inline void
cartesian_scale(const float *v, int16_t *xp, int16_t *yp, float scale) {
int16_t x = P_CENTER_X + float2int(v[0] * scale);
int16_t y = P_CENTER_Y - float2int(v[1] * scale);
if (x < 0) x = 0;
else if (x > WIDTH) x = WIDTH;
if (y < 0) y = 0;
else if (y > HEIGHT) y = HEIGHT;
*xp = x;
*yp = y;
}
#if MAX_TRACE_TYPE != 30
#error "Redefined trace_type list, need check format_list"
#endif
const trace_info_t trace_info_list[MAX_TRACE_TYPE] = {
// Type name format delta format symbol ref scale get value
[TRC_LOGMAG] = {"LOGMAG", "%.2f%s", S_DELTA "%.2f%s", S_dB, NGRIDY-1, 10.0f, logmag },
[TRC_PHASE] = {"PHASE", "%.2f%s", S_DELTA "%.2f%s", S_DEGREE, NGRIDY/2, 90.0f, phase },
[TRC_DELAY] = {"DELAY", "%.4F%s", "%.4F%s", S_SECOND, NGRIDY/2, 1e-9f, groupdelay_from_array},
[TRC_SMITH] = {"SMITH", NULL, NULL, "", 0, 1.00f, NULL }, // Custom
[TRC_POLAR] = {"POLAR", NULL, NULL, "", 0, 1.00f, NULL }, // Custom
[TRC_LINEAR] = {"LINEAR", "%.6f%s", S_DELTA "%.5f%s", "", 0, 0.125f, linear },
[TRC_SWR] = {"SWR", "%.3f%s", S_DELTA "%.3f%s", "", 0, 0.25f, swr },
[TRC_REAL] = {"REAL", "%.6f%s", S_DELTA "%.5f%s", "", NGRIDY/2, 0.25f, real },
[TRC_IMAG] = {"IMAG", "%.6fj%s",S_DELTA "%.5fj%s","", NGRIDY/2, 0.25f, imag },
[TRC_R] = {"R", "%.3F%s", S_DELTA "%.3F%s", S_OHM, 0, 100.0f, resistance },
[TRC_X] = {"X", "%.3F%s", S_DELTA "%.3F%s", S_OHM, NGRIDY/2, 100.0f, reactance },
[TRC_Z] = {"|Z|", "%.3F%s", S_DELTA "%.3F%s", S_OHM, 0, 50.0f, mod_z },
[TRC_ZPHASE] = {"Z phase","%.1f%s", S_DELTA "%.2f%s", S_DEGREE, NGRIDY/2, 90.0f, phase_z },
[TRC_G] = {"G", "%.3F%s", S_DELTA "%.3F%s", S_SIEMENS, 0, 0.01f, conductance },
[TRC_B] = {"B", "%.3F%s", S_DELTA "%.3F%s", S_SIEMENS,NGRIDY/2, 0.01f, susceptance },
[TRC_Y] = {"|Y|", "%.3F%s", S_DELTA "%.3F%s", S_SIEMENS, 0, 0.02f, mod_y },
[TRC_Rp] = {"Rp", "%.3F%s", S_DELTA "%.3F%s", S_OHM, 0, 100.0f, parallel_r },
[TRC_Xp] = {"Xp", "%.3F%s", S_DELTA "%.3F%s", S_OHM, NGRIDY/2, 100.0f, parallel_x },
[TRC_sC] = {"sC", "%.4F%s", S_DELTA "%.4F%s", S_FARAD, NGRIDY/2, 1e-8f, series_c },
[TRC_sL] = {"sL" , "%.4F%s", S_DELTA "%.4F%s", S_HENRY, NGRIDY/2, 1e-8f, series_l },
[TRC_pC] = {"pC", "%.4F%s", S_DELTA "%.4F%s", S_FARAD, NGRIDY/2, 1e-8f, parallel_c },
[TRC_pL] = {"pL" , "%.4F%s", S_DELTA "%.4F%s", S_HENRY, NGRIDY/2, 1e-8f, parallel_l },
[TRC_Q] = {"Q", "%.4f%s", S_DELTA "%.3f%s", "", 0, 10.0f, qualityfactor },
[TRC_Rser] = {"Rser", "%.3F%s", S_DELTA "%.3F%s", S_OHM, NGRIDY/2, 100.0f, s21series_r },
[TRC_Xser] = {"Xser", "%.3F%s", S_DELTA "%.3F%s", S_OHM, NGRIDY/2, 100.0f, s21series_x },
[TRC_Zser] = {"|Zser|", "%.3F%s", S_DELTA "%.3F%s", S_OHM, NGRIDY/2, 100.0f, s21series_z },
[TRC_Rsh] = {"Rsh", "%.3F%s", S_DELTA "%.3F%s", S_OHM, NGRIDY/2, 100.0f, s21shunt_r },
[TRC_Xsh] = {"Xsh", "%.3F%s", S_DELTA "%.3F%s", S_OHM, NGRIDY/2, 100.0f, s21shunt_x },
[TRC_Zsh] = {"|Zsh|", "%.3F%s", S_DELTA "%.3F%s", S_OHM, NGRIDY/2, 100.0f, s21shunt_z },
[TRC_Qs21] = {"Q", "%.4f%s", S_DELTA "%.3f%s", "", 0, 10.0f, s21_qualityfactor },
};
const marker_info_t marker_info_list[MS_END] = {
// Type name format get real get imag
[MS_LIN] = {"LIN", "%.2f %+.1f" S_DEGREE, linear, phase },
[MS_LOG] = {"LOG", "%.1f" S_dB " %+.1f" S_DEGREE, logmag, phase },
[MS_REIM] = {"Re + Im", "%F%+jF", real, imag },
[MS_RX] = {"R + jX", "%F%+jF" S_OHM, resistance, reactance },
[MS_RLC] = {"R + L/C", "%F" S_OHM " %F%c", resistance, reactance }, // use LC calc for imag
[MS_GB] = {"G + jB", "%F%+jF" S_SIEMENS, conductance, susceptance },
[MS_GLC] = {"G + L/C", "%F" S_SIEMENS " %F%c", conductance, parallel_x }, // use LC calc for imag
[MS_RpXp] = {"Rp + jXp", "%F%+jF" S_OHM, parallel_r, parallel_x },
[MS_RpLC] = {"Rp + L/C", "%F" S_OHM " %F%c", parallel_r, parallel_x }, // use LC calc for imag
[MS_SHUNT_RX] = {"R+jX SHUNT", "%F%+jF" S_OHM, s21shunt_r, s21shunt_x },
[MS_SERIES_RX] = {"R+jX SERIES","%F%+jF" S_OHM, s21series_r, s21series_x },
};
const char *get_trace_typename(int t, int marker_smith_format)
{
if (t == TRC_SMITH && ADMIT_MARKER_VALUE(marker_smith_format)) return "ADMIT";
return trace_info_list[t].name;
}
const char *get_smith_format_names(int m)
{
return marker_info_list[m].name;
}
static void mark_line(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2) {
x1/= CELLWIDTH; x2/= CELLWIDTH;
y1/= CELLHEIGHT; y2/= CELLHEIGHT;
if (x1 == x2 && y1 == y2) {
markmap[y1]|= 1 << x1;
return;
}
if (x1 > x2) SWAP(uint16_t, x1, x2);
uint32_t mask = ((1 << (x2 - x1 + 1)) - 1) << x1;
if (y1 > y2) SWAP(uint16_t, y1, y2);
for (; y1 <= y2; y1++)
markmap[y1]|= mask;
}
static void mark_set_index(index_t *index, uint16_t i, uint16_t x, uint16_t y) {
static uint16_t diff;
static index_t last_erase;
diff = (diff<<1);
if (index[i].x != x || index[i].y != y) diff|= 1;
if ((diff & 3) && i > 0) { // one of points for trace line change (only for > 0 index)
mark_line(last_erase.x, last_erase.y, index[i].x, index[i].y); // mark old line for erase
mark_line(index[i-1].x, index[i-1].y, x, y); // mark new line for draw
}
last_erase = index[i];
index[i].x = x;
index[i].y = y;
}
// Calculate and cache point coordinates for trace
static void
trace_into_index(int t) {
uint16_t start = 0, stop = sweep_points - 1, i;
float *array = &measured[trace[t].channel][0][0];
index_t *index = trace_index[t];
uint32_t type = 1<<trace[t].type;
get_value_cb_t c = trace_info_list[trace[t].type].get_value_cb; // Get callback for value calculation
float refpos = HEIGHT - (get_trace_refpos(t))*GRIDY + 0.5f; // 0.5 for pixel align
float scale = get_trace_scale(t);
if (type & RECTANGULAR_GRID_MASK) { // Run build for rect grid
const float dscale = GRIDY / scale;
if (type & (1<<TRC_SWR)) // For SWR need shift value by 1.0 down
refpos+= dscale;
uint32_t dx = ((WIDTH)<<16) / (sweep_points-1), x = (CELLOFFSETX<<16) + dx * start + 0x8000;
int32_t y;
for (i = start; i <= stop; i++, x+= dx) {
float v = 0;
if (c) v = c(i, &array[2*i]); // Get value
if (v == INFINITY) {
y = 0;
} else {
y = refpos - v * dscale;
if (y < 0) y = 0;
else if (y > HEIGHT) y = HEIGHT;
}
mark_set_index(index, i, (uint16_t)(x>>16), y);
}
return;
}
// Smith/Polar grid
if (type & ((1<<TRC_POLAR)|(1<<TRC_SMITH))) { // Need custom calculations
const float rscale = P_RADIUS / scale;
int16_t y, x;
for (i = start; i <= stop; i++){
cartesian_scale(&array[2*i], &x, &y, rscale);
mark_set_index(index, i, x, y);
}
return;
}
}
static void
format_smith_value(int xpos, int ypos, const float *coeff, uint16_t idx, uint16_t m)
{
char value = 0;
if (m >= MS_END) return;
get_value_cb_t re = marker_info_list[m].get_re_cb;
get_value_cb_t im = marker_info_list[m].get_im_cb;
const char *format = marker_info_list[m].format;
float zr = re(idx, coeff);
float zi = im(idx, coeff);
// Additional convert to L or C from zi for LC markers
if (LC_MARKER_VALUE(m)) {
float w = get_w(idx);
if (zi < 0) {zi =-1.0f / (w * zi); value = S_FARAD[0];} // Capacity
else {zi = zi / (w ); value = S_HENRY[0];} // Inductive
}
cell_printf(xpos, ypos, format, zr, zi, value);
}
static void
trace_print_value_string(int xpos, int ypos, int t, int index, int index_ref)
{
// Check correct input
uint8_t type = trace[t].type;
if (type >= MAX_TRACE_TYPE) return;
float (*array)[2] = measured[trace[t].channel];
float *coeff = array[index];
const char *format = index_ref >= 0 ? trace_info_list[type].dformat : trace_info_list[type].format; // Format string
get_value_cb_t c = trace_info_list[type].get_value_cb;
if (c){ // Run standard get value function from table
float v = c(index, coeff); // Get value
if (index_ref >= 0 && v != INFINITY) v-=c(index, array[index_ref]); // Calculate delta value
cell_printf(xpos, ypos, format, v, trace_info_list[type].symbol);
}
else { // Need custom marker format for SMITH / POLAR
format_smith_value(xpos, ypos, coeff, index, type == TRC_SMITH ? trace[t].smith_format : MS_REIM);
}
}
static int
trace_print_info(int xpos, int ypos, int t)
{
float scale = get_trace_scale(t);
const char *format;
int type = trace[t].type;
int smith = trace[t].smith_format;
const char *v = trace_info_list[trace[t].type].symbol;
switch (type) {
case TRC_SMITH:
case TRC_POLAR: format = (scale != 1.0f) ? "%s %0.1fFS" : "%s "; break;
default: format = "%s %F%s/"; break;
}
return cell_printf(xpos, ypos, format, get_trace_typename(type, smith), scale, v);
}
static float time_of_index(int idx)
{
freq_t span = get_sweep_frequency(ST_SPAN);
return (idx * (sweep_points-1)) / ((float)FFT_SIZE * span);
}
static float distance_of_index(int idx) {
return velocity_factor * (SPEED_OF_LIGHT / 200.0f) * time_of_index(idx);
}
static inline void clear_markmap(void) {
int n = MAX_MARKMAP_Y - 1;
do {markmap[n] = (map_t)0;} while(n--);
}
/*
* Force full screen update
*/
static inline void force_set_markmap(void) {
int n = MAX_MARKMAP_Y - 1;
do {markmap[n] = (map_t)-1;} while(n--);
}
/*
* Force region of screen update
*/
static void invalidate_rect_func(int x0, int y0, int x1, int y1) {
uint32_t mask = ((1 << (x1 - x0 + 1)) - 1) << x0;
for (; y0 <= y1; y0++)
if ((uint32_t)y0 < MAX_MARKMAP_Y)
markmap[y0]|= mask;
}
#define invalidate_rect(x0, y0, x1, y1) invalidate_rect_func((x0)/CELLWIDTH, (y0)/CELLHEIGHT, (x1)/CELLWIDTH, (y1)/CELLHEIGHT)
#if STORED_TRACES > 0
static uint8_t enabled_store_trace = 0;
void toogleStoredTrace(int idx) {
uint8_t mask = 1<<idx;
if (enabled_store_trace & mask) {
enabled_store_trace&= ~mask;
request_to_redraw(REDRAW_AREA);
return;
}
if (current_trace == TRACE_INVALID) return;
memcpy(trace_index[TRACES_MAX + idx], trace_index[current_trace], sizeof(trace_index[0]));
enabled_store_trace|= mask;
}
uint8_t getStoredTraces(void) {
return enabled_store_trace;
}
static bool needProcessTrace(uint16_t idx) {
if (idx < TRACES_MAX)
return trace[idx].enabled;
else if (idx < TRACE_INDEX_COUNT)
return enabled_store_trace & (1<<(idx-TRACES_MAX));
return false;
}
#else
#define enabled_store_trace 0
static bool needProcessTrace(uint16_t idx) {
return trace[idx].enabled;
}
#endif
void set_area_size(uint16_t w, uint16_t h) {
area_width = w;
area_height = h;
}
// Calculate marker area size depend from trace/marker count and options
static int marker_area_max(void) {
int t_count = 0, m_count = 0, i;
for (i = 0; i < TRACES_MAX; i++) if (trace[i].enabled) t_count++;
for (i = 0; i < MARKERS_MAX; i++) if (markers[i].enabled) m_count++;
int cnt = t_count > m_count ? t_count : m_count;
int extra = 0;
if (electrical_delay != 0.0f) extra+= 2;
if (s21_offset != 0.0f) extra+= 2;
#ifdef __VNA_Z_RENORMALIZATION__
if (current_props._portz != 50.0f) extra+= 2;
#endif
if (extra < 2) extra = 2;
cnt = (cnt + extra + 1)>>1;
return cnt * FONT_STR_HEIGHT;
}
static inline void
markmap_upperarea(void) {
// Hardcoded, Text info from upper area
invalidate_rect(0, 0, AREA_WIDTH_NORMAL, marker_area_max());
}
#ifdef __VNA_FAST_LINES__
// Little faster on easy traces, 2x faster if need lot of clipping and draw long lines
#include "vna_modules/vna_lines.c"
#else
// Little slower on easy traces, but slow if need lot of clip and draw long lines
static inline void
cell_drawline(int x0, int y0, int x1, int y1, pixel_t c)
{
if (x0 < 0 && x1 < 0) return;
if (y0 < 0 && y1 < 0) return;
if (x0 >= CELLWIDTH && x1 >= CELLWIDTH) return;
if (y0 >= CELLHEIGHT && y1 >= CELLHEIGHT) return;
// Modified Bresenham's line algorithm, see https://en.wikipedia.org/wiki/Bresenham%27s_line_algorithm
// Draw from top to bottom (most graph contain vertical lines)
if (y1 < y0) { SWAP(int, x0, x1); SWAP(int, y0, y1); }
int dx = (x0 - x1), sx = 1; if (dx > 0) { dx = -dx; sx = -sx; }
int dy = (y1 - y0);
int err = ((dy + dx) < 0 ? -dx : -dy) / 2;
// Fast skip points while y0 < 0
if (y0 < 0) {
while(1){
int e2 = err;
if (e2 > dx) { err-= dy; x0+=sx;}
if (e2 < dy) { err-= dx; y0++; if (y0 == 0) break;}
}
}
// align y by CELLWIDTH for faster calculations
y0*=CELLWIDTH;
y1*=CELLWIDTH;
while (1) {
if ((uint32_t)x0 < CELLWIDTH)
cell_buffer[y0 + x0] = c;
if (x0 + y0 == y1 + x1)
return;
int e2 = err;
if (e2 > dx) { err-= dy; x0+=sx;}
if (e2 < dy) { err-= dx; y0+=CELLWIDTH; if (y0>=CELLHEIGHT*CELLWIDTH) return;} // stop after cell bottom
}
}
#endif
// Give a little speedup then draw rectangular plot (50 systick on all calls, all render req 700 systick)
// Write more difficult algorithm for search indexes not give speedup
static int
search_index_range_x(int x1, int x2, index_t *index, int *i0, int *i1)
{
int i, j;
int head = 0;
int tail = sweep_points;
int idx_x;
// Search index point in cell
while (1) {
i = (head + tail) / 2;
idx_x = index[i].x;
if (idx_x >= x2) { // index after cell
if (tail == i)
return false;
tail = i;
}
else if (idx_x < x1) { // index before cell
if (head == i)
return false;
head = i;
}
else // index in cell (x =< idx_x < cell_end)
break;
}
j = i;
// Search index left from point
do {
if (j == 0) break;
j--;
} while (x1 <= index[j].x);
*i0 = j;
// Search index right from point
do {
if (i >=sweep_points-1) break;
i++;
} while (index[i].x < x2);
*i1 = i;
return TRUE;
}
static void
cell_blit_bitmap(int16_t x, int16_t y, uint16_t w, uint16_t h, const uint8_t *bmp)
{
if (x <= -w)
return;
int c = h + y;
if (c < 0) return;
if (c >= CELLHEIGHT) c = CELLHEIGHT; // clip bottom if need
if (y < 0) {bmp-= y*((w+7)>>3); y = 0;} // Clip top if need
for (uint8_t bits = 0; y < c; y++) {
for (int r = 0; r < w; r++, bits<<=1) {
if ((r&7)==0) bits = *bmp++;
if ((0x80 & bits) == 0) continue; // no pixel
if ((uint32_t)(x+r) >= CELLWIDTH ) continue; // x+r < 0 || x+r >= CELLWIDTH
cell_buffer[y*CELLWIDTH + x + r] = foreground_color;
}
}
}
#ifdef _USE_SHADOW_TEXT_
static void
cell_blit_bitmap_shadow(int16_t x, int16_t y, uint16_t w, uint16_t h, const uint8_t *bmp) {
int i;
if (x + w < 0 || h + y < 0) // Clipping
return;
// Prepare shadow bitmap
uint16_t dst[16];
uint16_t p0 = 0, p1 = 0, c = 16 - w;
uint16_t mask = (0xFFFF>>c)<<c;
if (h > ARRAY_COUNT(dst) - 2) h = ARRAY_COUNT(dst) - 2;
for (i = 0; i < h; i++) {
#if 1
c = (bmp[i]<<8) & mask; // extend from 8 bit width to 16 bit
#else
c = (((bmp[2*i]<<8)|bmp[2*i+1]) & mask); // extend from 16 bit width to 16 bit
#endif
c|= (c>>1) | (c>>2); // shadow horizontally
c = (c>>8) | (c<<8); // swap bytes (render do by 8 bit)
dst[i] = c | p0 | p1; // shadow vertically
p0 = p1; p1 = c; // shift data
}
dst[i ] = p0 | p1;
dst[i+1] = p1;
// Render shadow on cell
pixel_t t = foreground_color; // remember color
lcd_set_foreground(LCD_TXT_SHADOW_COLOR); // set shadow color
w+= 2; h+= 2; // Shadow size > by 2 pixel
cell_blit_bitmap(x-1, y-1, w < 9 ? 9 : w, h, (uint8_t *)dst);
foreground_color = t; // restore color
}
#endif
typedef struct {
const void *vmt;
int16_t x;
int16_t y;
} cellPrintStream;
static void put_normal(cellPrintStream *ps, uint8_t ch) {
uint16_t w = FONT_GET_WIDTH(ch);
#ifdef _USE_SHADOW_TEXT_