Rev 903 | Only display areas with differences | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed
Rev 903 | Rev 916 | ||
---|---|---|---|
1 | #include <inttypes.h> |
1 | #include <inttypes.h> |
2 | #include "ubx.h" |
2 | #include "ubx.h" |
3 | #include "main.h" |
3 | #include "main.h" |
4 | #include <avr/io.h> |
4 | #include <avr/io.h> |
5 | 5 | ||
6 | #include "uart.h" |
6 | #include "uart.h" |
7 | 7 | ||
8 | // ubx protocol parser state machine |
8 | // ubx protocol parser state machine |
9 | #define UBXSTATE_IDLE 0 |
9 | #define UBXSTATE_IDLE 0 |
10 | #define UBXSTATE_SYNC1 1 |
10 | #define UBXSTATE_SYNC1 1 |
11 | #define UBXSTATE_SYNC2 2 |
11 | #define UBXSTATE_SYNC2 2 |
12 | #define UBXSTATE_CLASS 3 |
12 | #define UBXSTATE_CLASS 3 |
13 | #define UBXSTATE_LEN1 4 |
13 | #define UBXSTATE_LEN1 4 |
14 | #define UBXSTATE_LEN2 5 |
14 | #define UBXSTATE_LEN2 5 |
15 | #define UBXSTATE_DATA 6 |
15 | #define UBXSTATE_DATA 6 |
16 | #define UBXSTATE_CKA 7 |
16 | #define UBXSTATE_CKA 7 |
17 | #define UBXSTATE_CKB 8 |
17 | #define UBXSTATE_CKB 8 |
18 | 18 | ||
19 | // ublox protocoll identifier |
19 | // ublox protocoll identifier |
20 | #define UBX_CLASS_NAV 0x01 |
20 | #define UBX_CLASS_NAV 0x01 |
21 | 21 | ||
22 | #define UBX_ID_POSLLH 0x02 |
22 | #define UBX_ID_POSLLH 0x02 |
23 | #define UBX_ID_SOL 0x06 |
23 | #define UBX_ID_SOL 0x06 |
24 | #define UBX_ID_VELNED 0x12 |
24 | #define UBX_ID_VELNED 0x12 |
25 | 25 | ||
26 | #define UBX_SYNC1_CHAR 0xB5 |
26 | #define UBX_SYNC1_CHAR 0xB5 |
27 | #define UBX_SYNC2_CHAR 0x62 |
27 | #define UBX_SYNC2_CHAR 0x62 |
28 | 28 | ||
29 | typedef struct { |
29 | typedef struct { |
30 | uint32_t ITOW; // ms GPS Millisecond Time of Week |
30 | uint32_t ITOW; // ms GPS Millisecond Time of Week |
31 | int32_t Frac; // ns remainder of rounded ms above |
31 | int32_t Frac; // ns remainder of rounded ms above |
32 | int16_t week; // GPS week |
32 | int16_t week; // GPS week |
33 | uint8_t GPSfix; // GPSfix Type, range 0..6 |
33 | uint8_t GPSfix; // GPSfix Type, range 0..6 |
34 | uint8_t Flags; // Navigation Status Flags |
34 | uint8_t Flags; // Navigation Status Flags |
35 | int32_t ECEF_X; // cm ECEF X coordinate |
35 | int32_t ECEF_X; // cm ECEF X coordinate |
36 | int32_t ECEF_Y; // cm ECEF Y coordinate |
36 | int32_t ECEF_Y; // cm ECEF Y coordinate |
37 | int32_t ECEF_Z; // cm ECEF Z coordinate |
37 | int32_t ECEF_Z; // cm ECEF Z coordinate |
38 | uint32_t PAcc; // cm 3D Position Accuracy Estimate |
38 | uint32_t PAcc; // cm 3D Position Accuracy Estimate |
39 | int32_t ECEFVX; // cm/s ECEF X velocity |
39 | int32_t ECEFVX; // cm/s ECEF X velocity |
40 | int32_t ECEFVY; // cm/s ECEF Y velocity |
40 | int32_t ECEFVY; // cm/s ECEF Y velocity |
41 | int32_t ECEFVZ; // cm/s ECEF Z velocity |
41 | int32_t ECEFVZ; // cm/s ECEF Z velocity |
42 | uint32_t SAcc; // cm/s Speed Accuracy Estimate |
42 | uint32_t SAcc; // cm/s Speed Accuracy Estimate |
43 | uint16_t PDOP; // 0.01 Position DOP |
43 | uint16_t PDOP; // 0.01 Position DOP |
44 | uint8_t res1; // reserved |
44 | uint8_t res1; // reserved |
45 | uint8_t numSV; // Number of SVs used in navigation solution |
45 | uint8_t numSV; // Number of SVs used in navigation solution |
46 | uint32_t res2; // reserved |
46 | uint32_t res2; // reserved |
47 | uint8_t Status; |
47 | uint8_t Status; |
48 | } GPS_SOL_t; |
48 | } GPS_SOL_t; |
49 | 49 | ||
50 | typedef struct { |
50 | typedef struct { |
51 | uint32_t ITOW; // ms GPS Millisecond Time of Week |
51 | uint32_t ITOW; // ms GPS Millisecond Time of Week |
52 | int32_t LON; // 1e-07 deg Longitude |
52 | int32_t LON; // 1e-07 deg Longitude |
53 | int32_t LAT; // 1e-07 deg Latitude |
53 | int32_t LAT; // 1e-07 deg Latitude |
54 | int32_t HEIGHT; // mm Height above Ellipsoid |
54 | int32_t HEIGHT; // mm Height above Ellipsoid |
55 | int32_t HMSL; // mm Height above mean sea level |
55 | int32_t HMSL; // mm Height above mean sea level |
56 | uint32_t Hacc; // mm Horizontal Accuracy Estimate |
56 | uint32_t Hacc; // mm Horizontal Accuracy Estimate |
57 | uint32_t Vacc; // mm Vertical Accuracy Estimate |
57 | uint32_t Vacc; // mm Vertical Accuracy Estimate |
58 | uint8_t Status; |
58 | uint8_t Status; |
59 | } GPS_POSLLH_t; |
59 | } GPS_POSLLH_t; |
60 | 60 | ||
61 | typedef struct { |
61 | typedef struct { |
62 | uint32_t ITOW; // ms GPS Millisecond Time of Week |
62 | uint32_t ITOW; // ms GPS Millisecond Time of Week |
63 | int32_t VEL_N; // cm/s NED north velocity |
63 | int32_t VEL_N; // cm/s NED north velocity |
64 | int32_t VEL_E; // cm/s NED east velocity |
64 | int32_t VEL_E; // cm/s NED east velocity |
65 | int32_t VEL_D; // cm/s NED down velocity |
65 | int32_t VEL_D; // cm/s NED down velocity |
66 | uint32_t Speed; // cm/s Speed (3-D) |
66 | uint32_t Speed; // cm/s Speed (3-D) |
67 | uint32_t GSpeed; // cm/s Ground Speed (2-D) |
67 | uint32_t GSpeed; // cm/s Ground Speed (2-D) |
68 | int32_t Heading; // 1e-05 deg Heading 2-D |
68 | int32_t Heading; // 1e-05 deg Heading 2-D |
69 | uint32_t SAcc; // cm/s Speed Accuracy Estimate |
69 | uint32_t SAcc; // cm/s Speed Accuracy Estimate |
70 | uint32_t CAcc; // deg Course / Heading Accuracy Estimate |
70 | uint32_t CAcc; // deg Course / Heading Accuracy Estimate |
71 | uint8_t Status; |
71 | uint8_t Status; |
72 | } GPS_VELNED_t; |
72 | } GPS_VELNED_t; |
73 | 73 | ||
74 | GPS_SOL_t GpsSol = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, INVALID}; |
74 | GPS_SOL_t GpsSol = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, INVALID}; |
75 | GPS_POSLLH_t GpsPosLlh = {0,0,0,0,0,0,0, INVALID}; |
75 | GPS_POSLLH_t GpsPosLlh = {0,0,0,0,0,0,0, INVALID}; |
76 | GPS_VELNED_t GpsVelNed = {0,0,0,0,0,0,0,0,0, INVALID}; |
76 | GPS_VELNED_t GpsVelNed = {0,0,0,0,0,0,0,0,0, INVALID}; |
77 | GPS_INFO_t GPSInfo = {0,0,0,0,0,0,0,0,0,0, INVALID}; |
77 | GPS_INFO_t GPSInfo = {0,0,0,0,0,0,0,0,0,0, INVALID}; |
78 | 78 | ||
79 | volatile uint8_t GPSTimeout = 0; |
79 | volatile uint8_t GPSTimeout = 0; |
80 | 80 | ||
81 | void UpdateGPSInfo (void) |
81 | void UpdateGPSInfo (void) |
82 | { |
82 | { |
83 | static uint32_t lasttime; |
83 | static uint32_t lasttime; |
84 | if (GpsSol.Status == VALID) // valid packet |
84 | if (GpsSol.Status == VALID) // valid packet |
85 | { |
85 | { |
86 | GPSInfo.satfix = GpsSol.GPSfix; |
86 | GPSInfo.satfix = GpsSol.GPSfix; |
87 | GPSInfo.satnum = GpsSol.numSV; |
87 | GPSInfo.satnum = GpsSol.numSV; |
88 | GPSInfo.PAcc = GpsSol.PAcc; |
88 | GPSInfo.PAcc = GpsSol.PAcc; |
89 | GPSInfo.VAcc = GpsSol.SAcc; |
89 | GPSInfo.VAcc = GpsSol.SAcc; |
90 | GpsSol.Status = PROCESSED; // never update old data |
90 | GpsSol.Status = PROCESSED; // never update old data |
91 | } |
91 | } |
92 | if (GpsPosLlh.Status == VALID) // valid packet |
92 | if (GpsPosLlh.Status == VALID) // valid packet |
93 | { |
93 | { |
94 | GPSInfo.updatetime = GpsPosLlh.ITOW - lasttime; |
94 | GPSInfo.updatetime = GpsPosLlh.ITOW - lasttime; |
95 | lasttime = GpsPosLlh.ITOW; |
95 | lasttime = GpsPosLlh.ITOW; |
96 | GPSInfo.longitude = GpsPosLlh.LON; |
96 | GPSInfo.longitude = GpsPosLlh.LON; |
97 | GPSInfo.latitude = GpsPosLlh.LAT; |
97 | GPSInfo.latitude = GpsPosLlh.LAT; |
98 | GPSInfo.altitude = GpsPosLlh.HEIGHT; |
98 | GPSInfo.altitude = GpsPosLlh.HEIGHT; |
99 | GpsPosLlh.Status = PROCESSED; // never update old data |
99 | GpsPosLlh.Status = PROCESSED; // never update old data |
100 | } |
100 | } |
101 | if (GpsVelNed.Status == VALID) // valid packet |
101 | if (GpsVelNed.Status == VALID) // valid packet |
102 | { |
102 | { |
103 | GPSInfo.veleast = GpsVelNed.VEL_E; |
103 | GPSInfo.veleast = GpsVelNed.VEL_E; |
104 | GPSInfo.velnorth = GpsVelNed.VEL_N; |
104 | GPSInfo.velnorth = GpsVelNed.VEL_N; |
105 | GPSInfo.veltop = -GpsVelNed.VEL_D; |
105 | GPSInfo.veltop = -GpsVelNed.VEL_D; |
106 | GPSInfo.velground = GpsVelNed.GSpeed; |
106 | GPSInfo.velground = GpsVelNed.GSpeed; |
107 | GpsVelNed.Status = PROCESSED; // never update old data |
107 | GpsVelNed.Status = PROCESSED; // never update old data |
108 | } |
108 | } |
109 | if ((GpsSol.Status != INVALID) && (GpsPosLlh.Status != INVALID) && (GpsVelNed.Status != INVALID)) |
109 | if ((GpsSol.Status != INVALID) && (GpsPosLlh.Status != INVALID) && (GpsVelNed.Status != INVALID)) |
110 | { |
110 | { |
111 | GPSInfo.status = VALID; // set valid if data are updated |
111 | GPSInfo.status = VALID; // set valid if data are updated |
112 | } |
112 | } |
113 | } |
113 | } |
114 | 114 | ||
115 | 115 | ||
116 | // this function should be called within the UART RX ISR |
116 | // this function should be called within the UART RX ISR |
117 | void ubx_parser(uint8_t c) |
117 | void ubx_parser(uint8_t c) |
118 | { |
118 | { |
119 | static uint8_t ubxstate = UBXSTATE_IDLE; |
119 | static uint8_t ubxstate = UBXSTATE_IDLE; |
120 | static uint8_t cka, ckb; |
120 | static uint8_t cka, ckb; |
121 | static uint16_t msglen; |
121 | static uint16_t msglen; |
122 | static int8_t *ubxP, *ubxEp, *ubxSp; // pointers to data currently transfered |
122 | static int8_t *ubxP, *ubxEp, *ubxSp; // pointers to data currently transfered |
123 | 123 | ||
124 | switch(ubxstate) |
124 | switch(ubxstate) |
125 | { |
125 | { |
126 | case UBXSTATE_IDLE: // check 1st sync byte |
126 | case UBXSTATE_IDLE: // check 1st sync byte |
127 | if (c == UBX_SYNC1_CHAR) ubxstate = UBXSTATE_SYNC1; |
127 | if (c == UBX_SYNC1_CHAR) ubxstate = UBXSTATE_SYNC1; |
128 | else ubxstate = UBXSTATE_IDLE; // out of synchronization |
128 | else ubxstate = UBXSTATE_IDLE; // out of synchronization |
129 | break; |
129 | break; |
130 | 130 | ||
131 | case UBXSTATE_SYNC1: // check 2nd sync byte |
131 | case UBXSTATE_SYNC1: // check 2nd sync byte |
132 | if (c == UBX_SYNC2_CHAR) ubxstate = UBXSTATE_SYNC2; |
132 | if (c == UBX_SYNC2_CHAR) ubxstate = UBXSTATE_SYNC2; |
133 | else ubxstate = UBXSTATE_IDLE; // out of synchronization |
133 | else ubxstate = UBXSTATE_IDLE; // out of synchronization |
134 | break; |
134 | break; |
135 | 135 | ||
136 | case UBXSTATE_SYNC2: // check msg class to be NAV |
136 | case UBXSTATE_SYNC2: // check msg class to be NAV |
137 | if (c == UBX_CLASS_NAV) ubxstate = UBXSTATE_CLASS; |
137 | if (c == UBX_CLASS_NAV) ubxstate = UBXSTATE_CLASS; |
138 | else ubxstate = UBXSTATE_IDLE; // unsupported message class |
138 | else ubxstate = UBXSTATE_IDLE; // unsupported message class |
139 | break; |
139 | break; |
140 | 140 | ||
141 | case UBXSTATE_CLASS: // check message identifier |
141 | case UBXSTATE_CLASS: // check message identifier |
142 | switch(c) |
142 | switch(c) |
143 | { |
143 | { |
144 | case UBX_ID_POSLLH: // geodetic position |
144 | case UBX_ID_POSLLH: // geodetic position |
145 | ubxP = (int8_t *)&GpsPosLlh; // data start pointer |
145 | ubxP = (int8_t *)&GpsPosLlh; // data start pointer |
146 | ubxEp = (int8_t *)(&GpsPosLlh + 1); // data end pointer |
146 | ubxEp = (int8_t *)(&GpsPosLlh + 1); // data end pointer |
147 | ubxSp = (int8_t *)&GpsPosLlh.Status; // status pointer |
147 | ubxSp = (int8_t *)&GpsPosLlh.Status; // status pointer |
148 | break; |
148 | break; |
149 | 149 | ||
150 | case UBX_ID_SOL: // navigation solution |
150 | case UBX_ID_SOL: // navigation solution |
151 | ubxP = (int8_t *)&GpsSol; // data start pointer |
151 | ubxP = (int8_t *)&GpsSol; // data start pointer |
152 | ubxEp = (int8_t *)(&GpsSol + 1); // data end pointer |
152 | ubxEp = (int8_t *)(&GpsSol + 1); // data end pointer |
153 | ubxSp = (int8_t *)&GpsSol.Status; // status pointer |
153 | ubxSp = (int8_t *)&GpsSol.Status; // status pointer |
154 | break; |
154 | break; |
155 | 155 | ||
156 | case UBX_ID_VELNED: // velocity vector in tangent plane |
156 | case UBX_ID_VELNED: // velocity vector in tangent plane |
157 | ubxP = (int8_t *)&GpsVelNed; // data start pointer |
157 | ubxP = (int8_t *)&GpsVelNed; // data start pointer |
158 | ubxEp = (int8_t *)(&GpsVelNed + 1); // data end pointer |
158 | ubxEp = (int8_t *)(&GpsVelNed + 1); // data end pointer |
159 | ubxSp = (int8_t *)&GpsVelNed.Status; // status pointer |
159 | ubxSp = (int8_t *)&GpsVelNed.Status; // status pointer |
160 | break; |
160 | break; |
161 | 161 | ||
162 | default: // unsupported identifier |
162 | default: // unsupported identifier |
163 | ubxstate = UBXSTATE_IDLE; |
163 | ubxstate = UBXSTATE_IDLE; |
164 | break; |
164 | break; |
165 | } |
165 | } |
166 | if (ubxstate != UBXSTATE_IDLE) |
166 | if (ubxstate != UBXSTATE_IDLE) |
167 | { |
167 | { |
168 | ubxstate = UBXSTATE_LEN1; |
168 | ubxstate = UBXSTATE_LEN1; |
169 | cka = UBX_CLASS_NAV + c; |
169 | cka = UBX_CLASS_NAV + c; |
170 | ckb = UBX_CLASS_NAV + cka; |
170 | ckb = UBX_CLASS_NAV + cka; |
171 | } |
171 | } |
172 | break; |
172 | break; |
173 | 173 | ||
174 | case UBXSTATE_LEN1: // 1st message length byte |
174 | case UBXSTATE_LEN1: // 1st message length byte |
175 | msglen = c; |
175 | msglen = c; |
176 | cka += c; |
176 | cka += c; |
177 | ckb += cka; |
177 | ckb += cka; |
178 | ubxstate = UBXSTATE_LEN2; |
178 | ubxstate = UBXSTATE_LEN2; |
179 | break; |
179 | break; |
180 | 180 | ||
181 | case UBXSTATE_LEN2: // 2nd message length byte |
181 | case UBXSTATE_LEN2: // 2nd message length byte |
182 | msglen += ((uint16_t)c)<<8; |
182 | msglen += ((uint16_t)c)<<8; |
183 | cka += c; |
183 | cka += c; |
184 | ckb += cka; |
184 | ckb += cka; |
185 | // if the old data are not processed so far then break parsing now |
185 | // if the old data are not processed so far then break parsing now |
186 | // to avoid writing new data in ISR during reading by another function |
186 | // to avoid writing new data in ISR during reading by another function |
- | 187 | if ( *ubxSp == VALID ) |
|
- | 188 | { |
|
- | 189 | UpdateGPSInfo(); //update GPS info respectively |
|
187 | if ( *ubxSp == VALID ) ubxstate = UBXSTATE_IDLE; |
190 | ubxstate = UBXSTATE_IDLE; |
- | 191 | } |
|
188 | else // data invalid or allready processd |
192 | else // data invalid or allready processd |
189 | { |
193 | { |
190 | *ubxSp = INVALID; |
194 | *ubxSp = INVALID; |
191 | ubxstate = UBXSTATE_DATA; |
195 | ubxstate = UBXSTATE_DATA; |
192 | } |
196 | } |
193 | break; |
197 | break; |
194 | 198 | ||
195 | case UBXSTATE_DATA: |
199 | case UBXSTATE_DATA: |
196 | if (ubxP < ubxEp) *ubxP++ = c; // copy curent data byte if any space is left |
200 | if (ubxP < ubxEp) *ubxP++ = c; // copy curent data byte if any space is left |
197 | cka += c; |
201 | cka += c; |
198 | ckb += cka; |
202 | ckb += cka; |
199 | if (--msglen == 0) ubxstate = UBXSTATE_CKA; // switch to next state if all data was read |
203 | if (--msglen == 0) ubxstate = UBXSTATE_CKA; // switch to next state if all data was read |
200 | break; |
204 | break; |
201 | 205 | ||
202 | case UBXSTATE_CKA: |
206 | case UBXSTATE_CKA: |
203 | if (c == cka) ubxstate = UBXSTATE_CKB; |
207 | if (c == cka) ubxstate = UBXSTATE_CKB; |
204 | else |
208 | else |
205 | { |
209 | { |
206 | *ubxSp = INVALID; |
210 | *ubxSp = INVALID; |
207 | ubxstate = UBXSTATE_IDLE; |
211 | ubxstate = UBXSTATE_IDLE; |
208 | } |
212 | } |
209 | break; |
213 | break; |
210 | 214 | ||
211 | case UBXSTATE_CKB: |
215 | case UBXSTATE_CKB: |
212 | if (c == ckb) |
216 | if (c == ckb) |
213 | { |
217 | { |
214 | *ubxSp = VALID; // new data are valid |
218 | *ubxSp = VALID; // new data are valid |
215 | ROT_FLASH; |
219 | ROT_FLASH; |
216 | UpdateGPSInfo(); //update GPS info respectively |
220 | UpdateGPSInfo(); //update GPS info respectively |
217 | GPSTimeout = 255; |
221 | GPSTimeout = 255; |
218 | } |
222 | } |
219 | else |
223 | else |
220 | { // if checksum not fit then set data invalid |
224 | { // if checksum not fit then set data invalid |
221 | *ubxSp = INVALID; |
225 | *ubxSp = INVALID; |
222 | } |
226 | } |
223 | ubxstate = UBXSTATE_IDLE; // ready to parse new data |
227 | ubxstate = UBXSTATE_IDLE; // ready to parse new data |
224 | break; |
228 | break; |
225 | 229 | ||
226 | default: // unknown ubx state |
230 | default: // unknown ubx state |
227 | ubxstate = UBXSTATE_IDLE; |
231 | ubxstate = UBXSTATE_IDLE; |
228 | break; |
232 | break; |
229 | } |
233 | } |
230 | 234 | ||
231 | } |
235 | } |
232 | 236 | ||
233 | 237 | ||
234 | 238 |