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More tweaking to A/C tracking.

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This commit is contained in:
Oliver Jowett 2016-10-11 21:29:39 +01:00
parent f6b1b94c7d
commit 4cb17c194c
3 changed files with 46 additions and 15 deletions
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6
interactive.c
View file

@ -178,7 +178,7 @@ void interactiveShowData(void) {
if (Modes.mode_ac) {
for (unsigned i = 1; i < 4096 && row < rows; ++i) {
if (modeAC_match[i] || modeAC_count[i] < 100)
if (modeAC_match[i] || modeAC_count[i] < 50 || modeAC_age[i] > 5)
continue;
char strMode[5] = " A ";
@ -191,7 +191,7 @@ void interactiveShowData(void) {
}
mvprintw(row, 0,
"%7s %-4s %04x %-8s %6s %3s %3s %7s %8s %5s %5d %2s\n",
"%7s %-4s %04x %-8s %6s %3s %3s %7s %8s %5s %5d %2d\n",
"", /* address */
strMode, /* mode */
modeA, /* squawk */
@ -203,7 +203,7 @@ void interactiveShowData(void) {
"", /* lon */
"", /* signal */
modeAC_count[i], /* messages */
""); /* seen */
modeAC_age[i]); /* age */
++row;
}
}

52
track.c
View file

@ -55,6 +55,7 @@
uint32_t modeAC_count[4096];
uint32_t modeAC_lastcount[4096];
uint32_t modeAC_match[4096];
uint32_t modeAC_age[4096];
//
// Return a new aircraft structure for the linked list of tracked
@ -661,33 +662,62 @@ static void trackMatchAC(uint64_t now)
// match on Mode A
if (trackDataValid(&a->squawk_valid)) {
unsigned i = modeAToIndex(a->squawk);
if ((modeAC_count[i] - modeAC_lastcount[i]) > TRACK_MODEAC_MIN_MESSAGES) {
if ((modeAC_count[i] - modeAC_lastcount[i]) >= TRACK_MODEAC_MIN_MESSAGES) {
a->modeA_hit = 1;
modeAC_match[i] = (modeAC_match[i] ? 0xFFFFFFFF : a->addr);
}
}
// match on Mode C
// match on Mode C (+/- 100ft)
if (trackDataValid(&a->altitude_valid)) {
int modeC = (a->altitude + 49) / 100;
unsigned modeA = modeCToModeA(modeC);
if (modeA) {
unsigned i = modeAToIndex(modeA);
if ((modeAC_count[i] - modeAC_lastcount[i]) > TRACK_MODEAC_MIN_MESSAGES) {
a->modeC_hit = 1;
modeAC_match[i] = (modeAC_match[i] ? 0xFFFFFFFF : a->addr);
}
unsigned i = modeAToIndex(modeA);
if (modeA && (modeAC_count[i] - modeAC_lastcount[i]) >= TRACK_MODEAC_MIN_MESSAGES) {
a->modeC_hit = 1;
modeAC_match[i] = (modeAC_match[i] ? 0xFFFFFFFF : a->addr);
}
modeA = modeCToModeA(modeC + 1);
i = modeAToIndex(modeA);
if (modeA && (modeAC_count[i] - modeAC_lastcount[i]) >= TRACK_MODEAC_MIN_MESSAGES) {
a->modeC_hit = 1;
modeAC_match[i] = (modeAC_match[i] ? 0xFFFFFFFF : a->addr);
}
modeA = modeCToModeA(modeC - 1);
i = modeAToIndex(modeA);
if (modeA && (modeAC_count[i] - modeAC_lastcount[i]) >= TRACK_MODEAC_MIN_MESSAGES) {
a->modeC_hit = 1;
modeAC_match[i] = (modeAC_match[i] ? 0xFFFFFFFF : a->addr);
}
}
}
// reset counts for next time
for (unsigned i = 0; i < 4096; ++i) {
if ((modeAC_count[i] - modeAC_lastcount[i]) <= TRACK_MODEAC_MIN_MESSAGES) {
modeAC_lastcount[i] = modeAC_count[i] = 0;
if (!modeAC_count[i])
continue;
if ((modeAC_count[i] - modeAC_lastcount[i]) < TRACK_MODEAC_MIN_MESSAGES) {
if (++modeAC_age[i] > 15) {
// not heard from for a while, clear it out
modeAC_lastcount[i] = modeAC_count[i] = modeAC_age[i] = 0;
}
} else {
modeAC_lastcount[i] = modeAC_count[i];
// this one is live
// set a high initial age for matches, so they age out rapidly
// and don't show up on the interactive display when the matching
// mode S data goes away or changes
if (modeAC_match[i]) {
modeAC_age[i] = 10;
} else {
modeAC_age[i] = 0;
}
}
modeAC_lastcount[i] = modeAC_count[i];
}
}

3
track.h
View file

@ -62,7 +62,7 @@
/* Minimum number of repeated Mode A/C replies with a particular Mode A code needed in a
* 1 second period before accepting that code.
*/
#define TRACK_MODEAC_MIN_MESSAGES 3
#define TRACK_MODEAC_MIN_MESSAGES 4
typedef struct {
datasource_t source; /* where the data came from */
@ -168,6 +168,7 @@ struct aircraft {
*/
extern uint32_t modeAC_count[4096];
extern uint32_t modeAC_match[4096];
extern uint32_t modeAC_age[4096];
/* is this bit of data valid? */
static inline int trackDataValid(const data_validity *v)