misc/adsb-tools
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Implement airspy_adsb send support.

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This commit is contained in:
Ian Gulliver
2016-02-17 21:53:34 -08:00
parent 236f058654
commit 1bc8d49d38
5 changed files with 69 additions and 0 deletions
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54
airspy_adsb.c
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@@ -6,6 +6,8 @@
#include "receive.h"
#include "airspy_adsb.h"
#define SEND_MHZ 20
struct __attribute__((packed)) airspy_adsb_common_overlay {
char mlat_timestamp[8];
char semicolon1;
@@ -85,6 +87,42 @@ static bool airspy_adsb_parse_mode_s_long(struct buf *buf, struct packet *packet
return true;
}
static void airspy_adsb_fill_common(struct packet *packet, struct airspy_adsb_common_overlay *overlay) {
overlay->semicolon1 = overlay->semicolon2 = overlay->semicolon3 = ';';
hex_from_int(
overlay->mlat_timestamp,
mlat_timestamp_scale_out(packet->mlat_timestamp, UINT32_MAX, SEND_MHZ),
sizeof(overlay->mlat_timestamp) / 2);
hex_from_int(overlay->mlat_precision, SEND_MHZ / 2, sizeof(overlay->mlat_precision) / 2);
hex_from_int(overlay->rssi, rssi_scale_out(packet->rssi, UINT16_MAX), sizeof(overlay->rssi) / 2);
}
static void airspy_adsb_serialize_mode_s_short(struct packet *packet, struct buf *buf) {
struct airspy_adsb_mode_s_short_overlay *overlay = (struct airspy_adsb_mode_s_short_overlay *) buf_at(buf, 0);
overlay->asterisk = '*';
overlay->semicolon = ';';
overlay->cr = '\r';
overlay->lf = '\n';
hex_from_bin(overlay->payload, packet->payload, sizeof(overlay->payload) / 2);
airspy_adsb_fill_common(packet, &overlay->common);
buf->length = sizeof(*overlay);
}
static void airspy_adsb_serialize_mode_s_long(struct packet *packet, struct buf *buf) {
struct airspy_adsb_mode_s_long_overlay *overlay = (struct airspy_adsb_mode_s_long_overlay *) buf_at(buf, 0);
overlay->asterisk = '*';
overlay->semicolon = ';';
overlay->cr = '\r';
overlay->lf = '\n';
hex_from_bin(overlay->payload, packet->payload, sizeof(overlay->payload) / 2);
airspy_adsb_fill_common(packet, &overlay->common);
buf->length = sizeof(*overlay);
}
void airspy_adsb_init() {
assert(sizeof(struct airspy_adsb_parser_state) <= PARSER_STATE_LEN);
assert(sizeof(struct airspy_adsb_mode_s_short_overlay) < BUF_LEN_MAX);
@@ -98,3 +136,19 @@ bool airspy_adsb_parse(struct buf *buf, struct packet *packet, void *state_in) {
airspy_adsb_parse_mode_s_short(buf, packet, state) ||
airspy_adsb_parse_mode_s_long(buf, packet, state));
}
void airspy_adsb_serialize(struct packet *packet, struct buf *buf) {
if (!packet) {
return;
}
switch (packet->type) {
case MODE_S_SHORT:
airspy_adsb_serialize_mode_s_short(packet, buf);
break;
case MODE_S_LONG:
airspy_adsb_serialize_mode_s_long(packet, buf);
break;
}
}