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| author | Chris Kuethe <chris.kuethe@gmail.com> | 2007-03-11 19:51:22 +0000 |
|---|---|---|
| committer | Chris Kuethe <chris.kuethe@gmail.com> | 2007-03-11 19:51:22 +0000 |
| commit | 918cb57109d78201e9f8a2db6c31aa26aa619ea8 (patch) | |
| tree | abe2d3915942ca7d6f612b3d30201ee85cfa1fd4 | |
| parent | bbce51c656ee078feb5a2a620633857c00a427ce (diff) | |
| download | gpsd-918cb57109d78201e9f8a2db6c31aa26aa619ea8.tar.gz | |
Allow NMEA-style messages prefixed with '!' to be passed in super-raw mode.
This is useful for devices like the Milltech Marine
SR162G integrated GPS/ Automatic Identification System.
With help from Maitland Bottoms, who reported this device originally.
| -rw-r--r-- | packet.c | 26 | ||||
| -rw-r--r-- | packet_states.h | 3 |
2 files changed, 29 insertions, 0 deletions
@@ -89,6 +89,10 @@ static void nextstate(struct gps_packet_t *lexer, lexer->state = NMEA_DOLLAR; break; } + if (c == '!') { + lexer->state = NMEA_BANG; + break; + } #endif /* NMEA_ENABLE */ #ifdef TNT_ENABLE if (c == '@') { @@ -198,6 +202,24 @@ static void nextstate(struct gps_packet_t *lexer, else lexer->state = GROUND_STATE; break; + case NMEA_BANG: + if (c == 'A') + lexer->state = AIS_LEAD_1; + else + lexer->state = GROUND_STATE; + break; + case AIS_LEAD_1: + if (c == 'I') + lexer->state = AIS_LEAD_2; + else + lexer->state = GROUND_STATE; + break; + case AIS_LEAD_2: + if (isalpha(c)) + lexer->state = NMEA_LEADER_END; + else + lexer->state = GROUND_STATE; + break; #ifdef TNT_ENABLE case TNT_LEADER: lexer->state = NMEA_LEADER_END; @@ -224,6 +246,8 @@ static void nextstate(struct gps_packet_t *lexer, case NMEA_RECOGNIZED: if (c == '$') lexer->state = NMEA_DOLLAR; + else if (c == '!') + lexer->state = NMEA_BANG; else lexer->state = GROUND_STATE; break; @@ -360,6 +384,8 @@ static void nextstate(struct gps_packet_t *lexer, case SIRF_ACK_LEAD_1: if (c == 'c') lexer->state = SIRF_ACK_LEAD_2; + else if (c == 'I') + lexer->state = AIS_LEAD_2; else lexer->state = GROUND_STATE; break; diff --git a/packet_states.h b/packet_states.h index 696360af..42d03627 100644 --- a/packet_states.h +++ b/packet_states.h @@ -6,6 +6,7 @@ #ifdef NMEA_ENABLE NMEA_DOLLAR, /* we've seen first character of NMEA leader */ + NMEA_BANG, /* we've seen first character of an AIS message '!' */ NMEA_PUB_LEAD, /* seen second character of NMEA G leader */ NMEA_VENDOR_LEAD, /* seen second character of NMEA P leader */ NMEA_LEADER_END, /* seen end char of NMEA leader, in body */ @@ -14,6 +15,8 @@ SIRF_ACK_LEAD_1, /* seen A of possible SiRF Ack */ SIRF_ACK_LEAD_2, /* seen c of possible SiRF Ack */ + AIS_LEAD_1, /* seen A of possible marine AIS message */ + AIS_LEAD_2, /* seen I of possible marine AIS message */ SEATALK_LEAD_1, /* SeaTalk/Garmin packet leader 'I' */ #endif /* NMEA_ENABLE */ |