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earthsat.cpp
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/* manage selection and display of one earth sat.
*
* we call "pass" the overhead view shown in dx_info_b, "path" the orbit shown on the map.
*
* N.B. our satellite info server changes blanks to underscores in sat names.
*/
#include "HamClock.h"
bool dx_info_for_sat; // global to indicate whether dx_info_b is for DX info or sat info
#define MAX_TLE_AGE 7.0F // max age to use a TLE, days (except moon)
#define SAT_MIN_EL 1.0F // minimum sat elevation for event
#define TLE_REFRESH (3600*6) // freshen TLEs this often, seconds
#define SAT_TOUCH_R 20U // touch radius, pixels
#define SAT_UP_R 2 // dot radius when up
#define PASS_STEP 10.0F // pass step size, seconds
#define MAX_PATH 2000 // max number of points in orbit path
#define MAX_FOOT 1625 // max number of points in viewing footprint; must be 13*
#define TBORDER 50 // top border
#define FONT_H (dx_info_b.h/6) // font height
#define FONT_D 5 // font descent
#define SAT_COLOR RA8875_RED // path color
#define GIMBALWRAP_COL RA8875_CYAN // gimbal wrap az marker color
#define SOON_COLOR RA8875_GREEN // text color for pass soon
#define SOON_MINS 10 // "soon", minutes
#define FP_COLOR RA8875_RED // foot print color
#define TRACK_COLOR RGB565(128,0,0) // track color
#define PASS_COLOR FP_COLOR // pass color
#define CB_SIZE 20 // size of selection check box
#define CELL_H 32 // display cell height
#define N_COLS 4 // n cols in name table
#define Q_TO 5 // question timeout
#define CELL_W (tft.width()/N_COLS) // display cell width
#define N_ROWS ((tft.height()-TBORDER)/CELL_H) // n rows in name table
#define MAX_NSAT (N_ROWS*N_COLS) // max names we can display
#define MAX_PASS_STEPS 30 // max lines to draw for pass map
static const char sat_get_all[] = "/ham/HamClock/esats.pl?getall="; // command to get all TLE
static const char sat_one_page[] = "/ham/HamClock/esats.pl?tlename=%s"; // command to get one TLE
static Satellite *sat; // satellite definition, if any
static Observer *obs; // DE
static DateTime rise_time, set_time; // next pass info
static bool rise_ok, set_ok; // whether rise_time and set_time are valid
static float rise_az, set_az; // rise and set az, degrees, if valid
static bool ever_up, ever_down; // whether sat is ever above or below SAT_MIN_EL in next day
static SCoord *sat_path; // mallocd screen coords for orbit, first always now, Moon only 1
static SCoord *sat_foot; // mallocd screen coords for footprint
static uint16_t n_path, n_foot; // actual number in use
static SBox map_name_b; // location of sat name on map
static SBox ok_b = {730,10,55,35}; // Ok button
static char sat_name[NV_SATNAME_LEN]; // NV_SATNAME cache (spaces are underscores)
#define SAT_NAME_IS_SET() (sat_name[0]) // whether there is a sat name defined
static time_t tle_refresh; // last TLE update
static bool new_pass; // set when new pass is ready
/* completely undefine the current sat
*/
static void unsetSat()
{
if (sat) {
delete sat;
sat = NULL;
}
if (sat_path) {
free (sat_path);
sat_path = NULL;
}
if (sat_foot) {
free (sat_foot);
sat_foot = NULL;
}
sat_name[0] = '\0';
NVWriteString (NV_SATNAME, sat_name);
dx_info_for_sat = false;
}
/* copy strings up to maxlen, changing all from_char to to_char
*/
static void strncpySubChar (char to_str[], const char from_str[], char to_char, char from_char, int maxlen)
{
int l = 0;
char c;
while (l++ < maxlen && (c = *from_str++) != '\0')
*to_str++ = c == from_char ? to_char : c;
*to_str = '\0';
}
/* fill sat_foot with loci of points that see the sat at various viewing altitudes.
* N.B. call this before updateSatPath malloc's its memory
*/
static void updateFootPrint (float satlat, float satlng)
{
resetWatchdog();
// complement of satlat
float cosc = sinf(satlat);
float sinc = cosf(satlat);
#define N_ALTS 3 // number of altitudes to show
float alts[N_ALTS]; // the altitudes
uint16_t n_dots[N_ALTS]; // max dots for each
// show 0, 30 and 60 viewing altitudes, using more dots for the larger loci
alts[0] = 0; alts[1] = 30; alts[2] = 60;
n_dots[0] = 9*MAX_FOOT/13; n_dots[1] = 3*MAX_FOOT/13; n_dots[2] = 1*MAX_FOOT/13;
// start max size, then reduce when know
sat_foot = (SCoord *) realloc (sat_foot, MAX_FOOT*sizeof(SCoord));
if (!sat_foot) {
Serial.println (F("Failed to malloc sat_foot"));
while (1); // timeout
}
// sat_foot index
n_foot = 0;
for (uint8_t alt_i = 0; alt_i < N_ALTS; alt_i++) {
// satellite viewing altitude
float valt = deg2rad(alts[alt_i]);
// great-circle radius from subsat point to viewing circle at altitude valt
float vrad = sat->viewingRadius(valt);
// compute each point around viewing circle
float cosa, B;
for (uint16_t foot_i = 0; foot_i < n_dots[alt_i]; foot_i++) {
float A = foot_i*2*M_PI/n_dots[alt_i];
solveSphere (A, vrad, cosc, sinc, &cosa, &B);
float vlat = M_PIF/2-acosf(cosa);
float vlng = myfmodf(B+satlng+5*M_PIF,2*M_PIF)-M_PIF; // require [-180.180)
ll2s (vlat, vlng, sat_foot[n_foot], 2);
if (n_foot == 0 || memcmp (&sat_foot[n_foot], &sat_foot[n_foot-1], sizeof(SCoord)))
n_foot++;
}
}
// Serial.printf ("n_foot %u / %u\n", n_foot, MAX_FOOT);
// reduce
sat_foot = (SCoord *) realloc (sat_foot, n_foot*sizeof(SCoord));
if (!sat_foot) {
Serial.println (F("Failed to realloc sat_foot"));
while (1); // timeout
}
}
/* return a DateTime for the user's notion of current time
*/
static DateTime userNow()
{
uint32_t t = nowWO();
int yr = year(t);
int mo = month(t);
int dy = day(t);
int hr = hour(t);
int mn = minute(t);
int sc = second(t);
DateTime dt(yr, mo, dy, hr, mn, sc);
return (dt);
}
/* find next rise and set times if sat valid.
* always find rise and set in the future, so set_time will be < rise_time iff pass is in progress.
* also update flags ever_up, set_ok, ever_down and rise_ok.
*/
static void findNextPass(char *name)
{
if (!sat || !obs) {
set_ok = rise_ok = false;
return;
}
// measure how long this takes
uint32_t t0 = millis();
#define COARSE_DT 90L // seconds/step forward for fast search
#define FINE_DT (-2L) // seconds/step backward for refined search
float pel; // previous elevation
long dt = COARSE_DT; // search time step size, seconds
DateTime t_now = userNow(); // user's display time
DateTime t_srch = t_now + -FINE_DT; // search time, start beyond any previous solution
float tel, taz, trange, trate; // target el and az, degrees
// init pel and make first step
sat->predict (t_srch);
sat->topo (obs, pel, taz, trange, trate);
t_srch += dt;
// search up to a few days ahead for next rise and set times (for example for moon)
set_ok = rise_ok = false;
ever_up = ever_down = false;
while ((!set_ok || !rise_ok) && t_srch < t_now + 2.0F) {
resetWatchdog();
// find circumstances at time t_srch
sat->predict (t_srch);
sat->topo (obs, tel, taz, trange, trate);
// check for rising or setting events
if (tel >= SAT_MIN_EL) {
ever_up = true;
if (pel < SAT_MIN_EL) {
if (dt == FINE_DT) {
// found a refined set event (recall we are going backwards),
// record and resume forward time.
set_time = t_srch;
set_az = taz;
set_ok = true;
dt = COARSE_DT;
pel = tel;
} else if (!rise_ok) {
// found a coarse rise event, go back slower looking for better set
dt = FINE_DT;
pel = tel;
}
}
} else {
ever_down = true;
if (pel > SAT_MIN_EL) {
if (dt == FINE_DT) {
// found a refined rise event (recall we are going backwards).
// record and resume forward time but skip if set is within COARSE_DT because we
// would jump over it and find the NEXT set.
float check_tel, check_taz;
DateTime check_set = t_srch + COARSE_DT;
sat->predict (check_set);
sat->topo (obs, check_tel, check_taz, trange, trate);
if (check_tel >= SAT_MIN_EL) {
rise_time = t_srch;
rise_az = taz;
rise_ok = true;
}
// regardless, resume forward search
dt = COARSE_DT;
pel = tel;
} else if (!set_ok) {
// found a coarse set event, go back slower looking for better rise
dt = FINE_DT;
pel = tel;
}
}
}
// Serial.printf ("R %d S %d dt %ld from_now %8.3fs tel %g\n", rise_ok, set_ok, dt, 24*3600*(t_srch - t_now), tel);
// advance time and save tel
t_srch += dt;
pel = tel;
}
// new pass ready
new_pass = true;
Serial.printf ("%s: next rise in %g hrs, set in %g (%ld ms)\n", name,
rise_ok ? 24*(rise_time - t_now) : 0.0F, set_ok ? 24*(set_time - t_now) : 0.0F,
millis() - t0);
printFreeHeap (F("findNextPass"));
}
/* display next pass on sky dome.
* N.B. we assume findNextPass has been called
*/
static void drawNextPass()
{
resetWatchdog();
// size and center of screen path
uint16_t r0 = (dx_info_b.h-2*FONT_H)/2 - 1;
uint16_t xc = dx_info_b.x + dx_info_b.w/2;
uint16_t yc = dx_info_b.y + dx_info_b.h - r0 - 1;
// erase
tft.fillRect (dx_info_b.x+1, dx_info_b.y+2*FONT_H+1,
dx_info_b.w-2, dx_info_b.h-2*FONT_H+1, RA8875_BLACK);
// skip if no sat or never up
if (!sat || !obs || !ever_up)
return;
// find n steps, step duration and starting time
bool full_pass = false;
int n_steps = 0;
float step_dt = 0;
DateTime t;
if (rise_ok && set_ok) {
// find start and pass duration in days
float pass_duration = set_time - rise_time;
if (pass_duration < 0) {
// rise after set means pass is underway so start now for remaining duration
DateTime t_now = userNow();
pass_duration = set_time - t_now;
t = t_now;
} else {
// full pass so start at next rise
t = rise_time;
full_pass = true;
}
// find step size and number of steps
n_steps = pass_duration/(PASS_STEP/SPD) + 1;
if (n_steps > MAX_PASS_STEPS)
n_steps = MAX_PASS_STEPS;
step_dt = pass_duration/n_steps;
} else {
// it doesn't actually rise or set within the next 24 hour but it's up some time
// so just show it at its current position (if it's up)
n_steps = 1;
step_dt = 0;
t = userNow();
}
// draw horizon and compass points
#define HGRIDCOL RGB565(50,90,50)
tft.drawCircle (xc, yc, r0, BRGRAY);
for (float a = 0; a < 2*M_PIF; a += M_PIF/6) {
uint16_t xr = lroundf(xc + r0*cosf(a));
uint16_t yr = lroundf(yc - r0*sinf(a));
tft.fillCircle (xr, yr, 1, RA8875_WHITE);
tft.drawLine (xc, yc, xr, yr, HGRIDCOL);
}
float gwaz;
if (getGimbalWrapAz (&gwaz)) {
uint16_t xr = lroundf(xc + r0*sinf(deg2rad(gwaz)));
uint16_t yr = lroundf(yc - r0*cosf(deg2rad(gwaz)));
tft.fillCircle (xr, yr, 2, GIMBALWRAP_COL);
printf ("az_mnt0 %g\n", gwaz);
}
// draw elevations
for (uint8_t el = 30; el < 90; el += 30)
tft.drawCircle (xc, yc, r0*(90-el)/90, HGRIDCOL);
// label sky directions
selectFontStyle (LIGHT_FONT, FAST_FONT);
tft.setTextColor (BRGRAY);
tft.setCursor (xc - r0, yc - r0 + 2);
tft.print (F("NW"));
tft.setCursor (xc + r0 - 12, yc - r0 + 2);
tft.print (F("NE"));
tft.setCursor (xc - r0, yc + r0 - 8);
tft.print (F("SW"));
tft.setCursor (xc + r0 - 12, yc + r0 - 8);
tft.print (F("SE"));
// connect several points from t until set_time, find max elevation for labeling
float max_el = 0;
uint16_t max_el_x = 0, max_el_y = 0;
uint16_t prev_x = 0, prev_y = 0;
for (uint8_t i = 0; i < n_steps; i++) {
resetWatchdog();
// find topocentric position @ t
float el, az, range, rate;
sat->predict (t);
sat->topo (obs, el, az, range, rate);
if (el < 0 && n_steps == 1)
break; // only showing pos now but it's down
// find screen postion
float r = r0*(90-el)/90; // screen radius, zenith at center
uint16_t x = xc + r*sinf(deg2rad(az)) + 0.5F; // want east right
uint16_t y = yc - r*cosf(deg2rad(az)) + 0.5F; // want north up
// find max el
if (el > max_el) {
max_el = el;
max_el_x = x;
max_el_y = y;
}
// connect if have prev or just dot if only one
if (i > 0 && (prev_x != x || prev_y != y)) // avoid bug with 0-length line
tft.drawLine (prev_x, prev_y, x, y, PASS_COLOR);
else if (n_steps == 1)
tft.fillCircle (x, y, SAT_UP_R, SAT_COLOR);
// label the set end if last step of several and full pass
if (full_pass && i == n_steps - 1) {
// x,y is very near horizon, try to move inside a little for clarity
x += x > xc ? -12 : 2;
y += y > yc ? -8 : 4;
tft.setCursor (x, y);
tft.print('S');
}
// save
prev_x = x;
prev_y = y;
// next t
t += step_dt;
}
// label max elevation and time up iff we have a full pass
if (max_el > 0 && full_pass) {
// max el
uint16_t x = max_el_x, y = max_el_y;
bool draw_left_of_pass = max_el_x > xc;
bool draw_below_pass = max_el_y < yc;
x += draw_left_of_pass ? -30 : 20;
y += draw_below_pass ? 5 : -18;
tft.setCursor (x, y);
tft.print(max_el, 0);
tft.drawCircle (tft.getCursorX()+2, tft.getCursorY(), 1, BRGRAY); // simple degree symbol
// pass duration
int s_up = (set_time - rise_time)*24*3600;
char tup_str[32];
if (s_up >= 3600) {
int h = s_up/3600;
int m = (s_up - 3600*h)/60;
snprintf (tup_str, sizeof(tup_str), "%dh%02d", h, m);
} else {
int m = s_up/60;
int s = s_up - 60*m;
snprintf (tup_str, sizeof(tup_str), "%d:%02d", m, s);
}
uint16_t bw = getTextWidth (tup_str);
if (draw_left_of_pass)
x = tft.getCursorX() - bw + 4; // account for deg
y += draw_below_pass ? 12 : -11;
tft.setCursor (x, y);
tft.print(tup_str);
}
printFreeHeap (F("drawNextPass"));
}
/* draw name of current satellite on the map and also possibly in dx_info box
*/
static void drawSatName()
{
if (!sat || !obs || !SAT_NAME_IS_SET())
return;
resetWatchdog();
// retrieve saved name without '_'
char user_name[NV_SATNAME_LEN];
strncpySubChar (user_name, sat_name, ' ', '_', NV_SATNAME_LEN);
// draw in dx_info if using it for sat info
if (dx_info_for_sat) {
// erase
tft.fillRect (dx_info_b.x, dx_info_b.y+1, dx_info_b.w, dx_info_b.h-1, RA8875_BLACK);
// shorten until fits in satname_b
selectFontStyle (LIGHT_FONT, SMALL_FONT);
tft.setTextColor (SAT_COLOR);
uint16_t bw;
while (1) {
bw = getTextWidth (user_name);
if (bw <= satname_b.w)
break;
user_name[strlen(user_name) - 1] = '\0';
}
// draw
tft.fillRect (satname_b.x, satname_b.y, satname_b.w, satname_b.h, RA8875_BLACK);
tft.setCursor (satname_b.x + (satname_b.w - bw)/2, satname_b.y+FONT_H - 2);
tft.print (user_name);
}
}
/* fill map_name_b with where sat name should go on map
*/
static void setSatMapNameLoc()
{
// retrieve saved name without '_'
char user_name[NV_SATNAME_LEN];
strncpySubChar (user_name, sat_name, ' ', '_', NV_SATNAME_LEN);
// get size
selectFontStyle (LIGHT_FONT, SMALL_FONT);
uint16_t bw, bh;
getTextBounds (user_name, &bw, &bh);
map_name_b.w = bw;
map_name_b.h = bh;
if (azm_on) {
// easy: just print between hemispheres
map_name_b.x = map_b.x + (map_b.w - map_name_b.w)/2 ;
map_name_b.y = map_b.y + 10;
} else {
// locate name far from current location and potential obstacles.
// N.B. start choice above RSS and below sun and moon
SCoord loc = sat_path[0];
if (loc.x < map_b.x + map_b.w/2) {
// Indian ocean
map_name_b.x = map_b.x + 5*map_b.w/8;
map_name_b.y = rss_bnr_b.y - map_name_b.h - 5;
} else {
// south pacific
map_name_b.x = map_b.x + map_b.w/10;
map_name_b.y = rss_bnr_b.y - map_name_b.h - 5;
}
// check it's not on the path
for (uint16_t p = 0; p < n_path; p++) {
SCoord s = sat_path[p];
if (inBox (s, map_name_b))
map_name_b.x = s.x + 20;
}
// avoid antipodal and markers
if (inBox (deap_c.s, map_name_b))
map_name_b.x = deap_c.s.x + DEAP_R + 20;
if (inBox (de_c.s, map_name_b))
map_name_b.x = de_c.s.x + DE_R + 20;
if (inBox (dx_c.s, map_name_b))
map_name_b.x = dx_c.s.x + DX_R + 20;
// check if any of these corrections went too far right
if (map_name_b.x + map_name_b.w > map_b.x + map_b.w)
map_name_b.x = map_b.x + 20;
}
}
/* mark current sat pass location
*/
static void drawSatNow()
{
resetWatchdog();
float az, el, raz, saz;
getSatAzElNow (NULL, &az, &el, &raz, &saz, NULL, NULL);
// size and center of screen path
uint16_t r0 = (dx_info_b.h-2*FONT_H)/2;
uint16_t x0 = dx_info_b.x + dx_info_b.w/2;
uint16_t y0 = dx_info_b.y + dx_info_b.h - r0;
float r = r0*(90-el)/90; // screen radius, zenith at center
uint16_t x = x0 + r*sinf(deg2rad(az)) + 0.5F; // want east right
uint16_t y = y0 - r*cosf(deg2rad(az)) + 0.5F; // want north up
tft.fillCircle (x, y, SAT_UP_R, SAT_COLOR);
}
/* draw event title and time t in the dx_info box unless t < 0 then just show title.
* t is in days: if > 1 hour show HhM else M:S
*/
static void drawSatTime (const char *title, float t)
{
if (!sat)
return;
resetWatchdog();
static char prev_title[30];
static uint8_t prev_a, prev_b;
selectFontStyle (LIGHT_FONT, SMALL_FONT);
tft.setTextColor (SAT_COLOR);
// erase if different title
if (strcmp (title, prev_title)) {
tft.fillRect (dx_info_b.x, dx_info_b.y+FONT_H, dx_info_b.w, FONT_H, RA8875_BLACK);
strncpy (prev_title, title, sizeof(prev_title)-1);
}
// draw title (even if the same, in case it was erased for some other reason)
tft.setCursor (dx_info_b.x+1, dx_info_b.y+2*FONT_H-5);
tft.print (title);
uint16_t timex = tft.getCursorX();
// draw time unless coded to be ignored
if (t >= 0) {
// assume H:M
char sep = 'h';
t *= 24;
uint8_t a = t, b;
if (a == 0) {
// change to M:S
sep = ':';
t *= 60;
a = t;
}
b = (t - a)*60;
// erase if different time
if (a != prev_a || b != prev_b) {
tft.fillRect (timex, dx_info_b.y+FONT_H, dx_info_b.w-(timex-dx_info_b.x), FONT_H, RA8875_BLACK);
prev_a = a;
prev_b = b;
}
// draw time (even if the same, like title, in case it was erased for some other reason)
tft.print(a);
tft.print(sep);
if (b < 10)
tft.print('0');
tft.print(b);
// tft.printf ("%d:%02d", a, b); often causes panic
} else {
// erase time
tft.fillRect (timex, dx_info_b.y+FONT_H, dx_info_b.w-(timex-dx_info_b.x), FONT_H, RA8875_BLACK);
}
}
/* return whether the given line appears to be a valid TLE
* only count digits and '-' counts as 1
*/
static bool tleHasValidChecksum (const char *line)
{
// sum first 68 chars
int sum = 0;
for (uint8_t i = 0; i < 68; i++) {
char c = *line++;
if (c == '-')
sum += 1;
else if (c == '\0')
return (false); // too short
else if (c >= '0' && c <= '9')
sum += c - '0';
}
// last char is sum of previous modulo 10
return ((*line - '0') == (sum%10));
}
/* clear screen, show the given message then restart operation without a sat
*/
static void fatalSatError (const char *fmt, ...)
{
char buf[256];
va_list ap;
int l = sprintf (buf, "Sat error: ");
va_start (ap, fmt);
vsnprintf (buf+l, sizeof(buf)-l, fmt, ap);
va_end (ap);
Serial.println (buf);
selectFontStyle (BOLD_FONT, SMALL_FONT);
uint16_t bw = getTextWidth (buf);
eraseScreen();
tft.setTextColor (RA8875_WHITE);
tft.setCursor ((tft.width()-bw)/2, tft.height()/2);
tft.print (buf);
wdDelay (5000);
resetWatchdog();
unsetSat();
initScreen();
}
static void showSelectionBox (uint16_t x, uint16_t y, bool on)
{
uint16_t fill_color = on ? SAT_COLOR : RA8875_BLACK;
tft.fillRect (x, y+(CELL_H-CB_SIZE)/2+3, CB_SIZE, CB_SIZE, fill_color);
tft.drawRect (x, y+(CELL_H-CB_SIZE)/2+3, CB_SIZE, CB_SIZE, RA8875_WHITE);
}
/* look up sat_name. if found set up sat, else inform user and remove sat altogether.
* return whether found it.
*/
static bool satLookup ()
{
Serial.printf ("Looking up %s\n", sat_name);
if (!SAT_NAME_IS_SET())
return (false);
// delete then restore if found
if (sat) {
delete sat;
sat = NULL;
}
WiFiClient tle_client;
char t1[TLE_LINEL], t2[TLE_LINEL];
char name[100];
bool ok = false;
resetWatchdog();
if (wifiOk() && tle_client.connect (svr_host, HTTPPORT)) {
resetWatchdog();
// query
snprintf (name, sizeof(name), sat_one_page, sat_name);
httpGET (tle_client, svr_host, name);
if (!httpSkipHeader (tle_client)) {
fatalSatError ("Bad http header");
goto out;
}
// first response line is sat name, should match query
if (!getTCPLine (tle_client, name, sizeof(name), NULL)) {
fatalSatError ("Satellite %s not found", sat_name);
goto out;
}
if (strcasecmp (name, sat_name)) {
fatalSatError ("Name does not match: '%s' '%s'", sat_name, name);
goto out;
}
// next two lines are TLE
if (!getTCPLine (tle_client, t1, sizeof(t1), NULL)) {
fatalSatError ("Error reading line 1");
goto out;
}
if (!tleHasValidChecksum (t1)) {
fatalSatError ("Bad checksum for %s in line 1", sat_name);
goto out;
}
if (!getTCPLine (tle_client, t2, sizeof(t2), NULL)) {
fatalSatError ("Error reading line 2");
goto out;
}
if (!tleHasValidChecksum (t2)) {
fatalSatError ("Bad checksum for %s in line 2", sat_name);
goto out;
}
// TLE looks good, update name so cases match, define new sat
memcpy (sat_name, name, sizeof(sat_name)-1); // retain EOS
sat = new Satellite (t1, t2);
tle_refresh = nowWO();
ok = true;
} else {
fatalSatError ("network error");
}
out:
tle_client.stop();
printFreeHeap (F("satLookup"));
return (ok);
}
/* show all names and allow op to choose one, wait forever unless timeout.
* save selection in sat_name, even if empty for no selection.
* return whether sat was selected.
*/
static bool askSat (bool timeout)
{
#define NO_SAT (-1) // cookie when op has chosen not to display a sat
resetWatchdog();
// don't inherit anything lingering after the tap that got us here
drainTouch();
// erase screen and set font
eraseScreen();
tft.setTextColor (RA8875_WHITE);
// show title, prompt and save end cursor location if running a countdown
uint16_t count_x = 0, count_y = 3*TBORDER/4;
uint8_t count_s = 5; // count down seconds
selectFontStyle (BOLD_FONT, SMALL_FONT);
tft.setCursor (5, count_y);
tft.print (F("Select satellite, or none"));
if (timeout) {
tft.print (F(" ... "));
count_x = tft.getCursorX();
tft.print(count_s);
}
uint32_t count_t0 = millis(); // start of count down
// show what SOON_COLOR means
tft.setTextColor (SOON_COLOR);
selectFontStyle (LIGHT_FONT, SMALL_FONT);
tft.setCursor (tft.width()-435, count_y);
tft.printf ("<%d Mins", SOON_MINS);
// show what SAT_COLOR means
tft.setTextColor (SAT_COLOR);
tft.setCursor (tft.width()-315, count_y);
tft.print (F("Now"));
// show rise units
tft.setTextColor (RA8875_WHITE);
tft.setCursor (tft.width()-250, count_y);
tft.print (F("Rise in HH:MM"));
selectFontStyle (BOLD_FONT, SMALL_FONT);
// show Ok button
drawStringInBox ("Ok", ok_b, false, RA8875_WHITE);
/// setup
char sat_names[MAX_NSAT][NV_SATNAME_LEN];
uint16_t prev_sel_x = 0, prev_sel_y = 0;
int8_t sel_idx = NO_SAT;
uint8_t n_sat = 0;
// open connection
WiFiClient sat_client;
resetWatchdog();
if (!wifiOk() || !sat_client.connect (svr_host, HTTPPORT))
goto out;
// query page and skip header
resetWatchdog();
httpGET (sat_client, svr_host, sat_get_all);
if (!httpSkipHeader (sat_client))
goto out;
// read and display each sat
selectFontStyle (LIGHT_FONT, SMALL_FONT);
for (n_sat = 0; n_sat < MAX_NSAT; n_sat++) {
// read name and 2 lines, done when eof
char t1[TLE_LINEL], t2[TLE_LINEL];
if (!getTCPLine (sat_client, &sat_names[n_sat][0], NV_SATNAME_LEN, NULL)
|| !getTCPLine (sat_client, t1, sizeof(t1), NULL)
|| !getTCPLine (sat_client, t2, sizeof(t2), NULL)) {
break;
}
// find row and column, col-major order
uint8_t r = n_sat % N_ROWS;
uint8_t c = n_sat / N_ROWS;
// ul corner
uint16_t x = c*CELL_W;
uint16_t y = TBORDER + r*CELL_H;
// show tick box, pre-select if saved before
if (strcmp (sat_name, sat_names[n_sat]) == 0) {
sel_idx = n_sat;
showSelectionBox (x, y, true);
prev_sel_x = x;
prev_sel_y = y;
} else {
showSelectionBox (x, y, false);
}
// display next rise time of this sat
if (sat)
delete sat;
sat = new Satellite (t1, t2);
findNextPass(sat_names[n_sat]);
tft.setTextColor (RA8875_WHITE);
tft.setCursor (x + CB_SIZE + 8, y + FONT_H);
if (rise_ok) {
DateTime t_now = userNow();
if (rise_time < set_time) {
// pass lies ahead
float hrs_to_rise = (rise_time - t_now)*24.0;
if (hrs_to_rise*60 < SOON_MINS)
tft.setTextColor (SOON_COLOR);
uint8_t mins_to_rise = (hrs_to_rise - (uint16_t)hrs_to_rise)*60;
if (hrs_to_rise < 1 && mins_to_rise < 1)
mins_to_rise = 1; // 00:00 looks wrong
if (hrs_to_rise < 10)
tft.print ('0');
tft.print ((uint16_t)hrs_to_rise);
tft.print (':');
if (mins_to_rise < 10)
tft.print ('0');
tft.print (mins_to_rise);
tft.print (' ');
} else {
// pass in progress
tft.setTextColor (SAT_COLOR);
tft.print (F("Up "));
}
} else if (!ever_up) {
tft.setTextColor (GRAY);
tft.print (F("NoR "));
} else if (!ever_down) {
tft.setTextColor (SAT_COLOR);
tft.print (F("NoS "));
}
// followed by scrubbed name
char user_name[NV_SATNAME_LEN];
strncpySubChar (user_name, sat_names[n_sat], ' ', '_', NV_SATNAME_LEN);
tft.print (user_name);
}
// close connection
sat_client.stop();
// bale if no satellites found
if (n_sat == 0)
goto out;
// follow touches to make selection, done when tap Ok or timeout after SEL_TO
selectFontStyle (BOLD_FONT, SMALL_FONT);
while (true) {
// wait for tap or time out
SCoord s;
while (readCalTouch(s) == TT_NONE) {
resetWatchdog();
if (timeout && count_s > 0) {
uint32_t t = millis();
if (t - count_t0 > 1000) {
if (--count_s == 0) {
// timed out: retain current selection
return (true);
}
// draw counter
tft.fillRect (count_x, count_y-30, 20, 40, RA8875_BLACK);
tft.setCursor (count_x, count_y);
tft.setTextColor (RA8875_WHITE);
tft.print(count_s);
count_t0 = t;
}
}
wdDelay(50);
}
// get here if user tapped something: abort countdown if using a timeout
if (timeout && count_s > 0) {
count_s = 0;
tft.fillRect (count_x, count_y-30, 20, 40, RA8875_BLACK);
}
// tap Ok?
if (inBox (s, ok_b)) {
// show Ok button toggle
drawStringInBox ("Ok", ok_b, true, RA8875_WHITE);
break;
}
// which satellite was tapped?
resetWatchdog();
uint8_t r = (s.y - TBORDER)/CELL_H;
uint8_t c = s.x/CELL_W;
if (s.x - c*CELL_W > CELL_W/2)
continue; // require tapping in left half of cell
uint8_t tap_idx = c*N_ROWS + r; // column major order
if (tap_idx < n_sat) {
// toggle
uint16_t x = c * CELL_W;
uint16_t y = TBORDER + r * CELL_H;
if (tap_idx == sel_idx) {
// already on: forget and toggle off
// Serial.printf ("forget %s\n", sat_names[sel_idx]);
showSelectionBox (x, y, false);
sel_idx = NO_SAT;
} else {
// toggle previous selection off (if any) and show selected
if (prev_sel_y > 0)
showSelectionBox (prev_sel_x, prev_sel_y, false);
sel_idx = tap_idx;
prev_sel_x = x;
prev_sel_y = y;
// Serial.printf ("select %s\n", sat_names[sel_idx]);
showSelectionBox (x, y, true);
}
}
}
out:
// close connection
sat_client.stop();
printFreeHeap (F("askSat"));
if (n_sat == 0) {
fatalSatError ("No satellites found");
return (false);
}
// set sat_name and whether any selected
if (sel_idx != NO_SAT) {
strcpy (sat_name, sat_names[sel_idx]);
return (true);
} else {
unsetSat();
return (false);
}
}
/* return whether sat epoch is known to be good.
*/
static bool checkSatEpoch()
{
if (!sat)
return (false);