Go to most recent revision | Details | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
1227 | killagreg | 1 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
2 | // + Copyright (c) 04.2007 Holger Buss |
||
3 | // + Nur für den privaten Gebrauch |
||
4 | // + www.MikroKopter.com |
||
5 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
||
6 | // + Es gilt für das gesamte Projekt (Hardware, Software, Binärfiles, Sourcecode und Dokumentation), |
||
7 | // + dass eine Nutzung (auch auszugsweise) nur für den privaten (nicht-kommerziellen) Gebrauch zulässig ist. |
||
8 | // + Sollten direkte oder indirekte kommerzielle Absichten verfolgt werden, ist mit uns (info@mikrokopter.de) Kontakt |
||
9 | // + bzgl. der Nutzungsbedingungen aufzunehmen. |
||
10 | // + Eine kommerzielle Nutzung ist z.B.Verkauf von MikroKoptern, Bestückung und Verkauf von Platinen oder Bausätzen, |
||
11 | // + Verkauf von Luftbildaufnahmen, usw. |
||
12 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
||
13 | // + Werden Teile des Quellcodes (mit oder ohne Modifikation) weiterverwendet oder veröffentlicht, |
||
14 | // + unterliegen sie auch diesen Nutzungsbedingungen und diese Nutzungsbedingungen incl. Copyright müssen dann beiliegen |
||
15 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
||
16 | // + Sollte die Software (auch auszugesweise) oder sonstige Informationen des MikroKopter-Projekts |
||
17 | // + auf anderen Webseiten oder sonstigen Medien veröffentlicht werden, muss unsere Webseite "http://www.mikrokopter.de" |
||
18 | // + eindeutig als Ursprung verlinkt werden |
||
19 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
||
20 | // + Keine Gewähr auf Fehlerfreiheit, Vollständigkeit oder Funktion |
||
21 | // + Benutzung auf eigene Gefahr |
||
22 | // + Wir übernehmen keinerlei Haftung für direkte oder indirekte Personen- oder Sachschäden |
||
23 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
||
24 | // + Die Portierung der Software (oder Teile davon) auf andere Systeme (ausser der Hardware von www.mikrokopter.de) ist nur |
||
25 | // + mit unserer Zustimmung zulässig |
||
26 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
||
27 | // + Die Funktion printf_P() unterliegt ihrer eigenen Lizenz und ist hiervon nicht betroffen |
||
28 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
||
29 | // + Redistributions of source code (with or without modifications) must retain the above copyright notice, |
||
30 | // + this list of conditions and the following disclaimer. |
||
31 | // + * Neither the name of the copyright holders nor the names of contributors may be used to endorse or promote products derived |
||
32 | // + from this software without specific prior written permission. |
||
33 | // + * The use of this project (hardware, software, binary files, sources and documentation) is only permittet |
||
34 | // + for non-commercial use (directly or indirectly) |
||
35 | // + Commercial use (for excample: selling of MikroKopters, selling of PCBs, assembly, ...) is only permitted |
||
36 | // + with our written permission |
||
37 | // + * If sources or documentations are redistributet on other webpages, out webpage (http://www.MikroKopter.de) must be |
||
38 | // + clearly linked as origin |
||
39 | // + * porting to systems other than hardware from www.mikrokopter.de is not allowed |
||
40 | // + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
||
41 | // + AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
||
42 | // + IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
||
43 | // + ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
||
44 | // + LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
||
45 | // + CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
||
46 | // + SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
||
47 | // + INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN// + CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
||
48 | // + ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
||
49 | // + POSSIBILITY OF SUCH DAMAGE. |
||
50 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
||
51 | #include <inttypes.h> |
||
52 | #include "ubx.h" |
||
53 | #include "main.h" |
||
54 | #include <avr/io.h> |
||
55 | |||
56 | //#include "uart0.h" |
||
57 | |||
58 | // ubx protocol parser state machine |
||
59 | #define UBXSTATE_IDLE 0 |
||
60 | #define UBXSTATE_SYNC1 1 |
||
61 | #define UBXSTATE_SYNC2 2 |
||
62 | #define UBXSTATE_CLASS 3 |
||
63 | #define UBXSTATE_LEN1 4 |
||
64 | #define UBXSTATE_LEN2 5 |
||
65 | #define UBXSTATE_DATA 6 |
||
66 | #define UBXSTATE_CKA 7 |
||
67 | #define UBXSTATE_CKB 8 |
||
68 | |||
69 | // ublox protocoll identifier |
||
70 | #define UBX_CLASS_NAV 0x01 |
||
71 | |||
72 | #define UBX_ID_POSLLH 0x02 |
||
73 | #define UBX_ID_SOL 0x06 |
||
74 | #define UBX_ID_VELNED 0x12 |
||
75 | |||
76 | #define UBX_SYNC1_CHAR 0xB5 |
||
77 | #define UBX_SYNC2_CHAR 0x62 |
||
78 | |||
79 | typedef struct { |
||
80 | uint32_t ITOW; // ms GPS Millisecond Time of Week |
||
81 | int32_t Frac; // ns remainder of rounded ms above |
||
82 | int16_t week; // GPS week |
||
83 | uint8_t GPSfix; // GPSfix Type, range 0..6 |
||
84 | uint8_t Flags; // Navigation Status Flags |
||
85 | int32_t ECEF_X; // cm ECEF X coordinate |
||
86 | int32_t ECEF_Y; // cm ECEF Y coordinate |
||
87 | int32_t ECEF_Z; // cm ECEF Z coordinate |
||
88 | uint32_t PAcc; // cm 3D Position Accuracy Estimate |
||
89 | int32_t ECEFVX; // cm/s ECEF X velocity |
||
90 | int32_t ECEFVY; // cm/s ECEF Y velocity |
||
91 | int32_t ECEFVZ; // cm/s ECEF Z velocity |
||
92 | uint32_t SAcc; // cm/s Speed Accuracy Estimate |
||
93 | uint16_t PDOP; // 0.01 Position DOP |
||
94 | uint8_t res1; // reserved |
||
95 | uint8_t numSV; // Number of SVs used in navigation solution |
||
96 | uint32_t res2; // reserved |
||
97 | Status_t Status; |
||
98 | } UBX_SOL_t; |
||
99 | |||
100 | typedef struct { |
||
101 | uint32_t ITOW; // ms GPS Millisecond Time of Week |
||
102 | int32_t LON; // 1e-07 deg Longitude |
||
103 | int32_t LAT; // 1e-07 deg Latitude |
||
104 | int32_t HEIGHT; // mm Height above Ellipsoid |
||
105 | int32_t HMSL; // mm Height above mean sea level |
||
106 | uint32_t Hacc; // mm Horizontal Accuracy Estimate |
||
107 | uint32_t Vacc; // mm Vertical Accuracy Estimate |
||
108 | Status_t Status; |
||
109 | } UBX_POSLLH_t; |
||
110 | |||
111 | typedef struct { |
||
112 | uint32_t ITOW; // ms GPS Millisecond Time of Week |
||
113 | int32_t VEL_N; // cm/s NED north velocity |
||
114 | int32_t VEL_E; // cm/s NED east velocity |
||
115 | int32_t VEL_D; // cm/s NED down velocity |
||
116 | uint32_t Speed; // cm/s Speed (3-D) |
||
117 | uint32_t GSpeed; // cm/s Ground Speed (2-D) |
||
118 | int32_t Heading; // 1e-05 deg Heading 2-D |
||
119 | uint32_t SAcc; // cm/s Speed Accuracy Estimate |
||
120 | uint32_t CAcc; // deg Course / Heading Accuracy Estimate |
||
121 | Status_t Status; |
||
122 | } UBX_VELNED_t; |
||
123 | |||
124 | UBX_SOL_t UbxSol = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, INVALID}; |
||
125 | UBX_POSLLH_t UbxPosLlh = {0,0,0,0,0,0,0, INVALID}; |
||
126 | UBX_VELNED_t UbxVelNed = {0,0,0,0,0,0,0,0,0, INVALID}; |
||
127 | GPS_INFO_t GPSInfo = {0,0,0,0,0,0,0,0,0,0, INVALID}; |
||
128 | |||
129 | volatile uint8_t GPSTimeout = 0; |
||
130 | |||
131 | void UpdateGPSInfo (void) |
||
132 | { |
||
133 | |||
134 | if ((UbxSol.Status == NEWDATA) && (UbxPosLlh.Status == NEWDATA) && (UbxVelNed.Status == NEWDATA)) |
||
135 | { |
||
136 | RED_FLASH; |
||
137 | if(GPSInfo.status != NEWDATA) |
||
138 | { |
||
139 | GPSInfo.status = INVALID; |
||
140 | // NAV SOL |
||
141 | GPSInfo.flags = UbxSol.Flags; |
||
142 | GPSInfo.satfix = UbxSol.GPSfix; |
||
143 | GPSInfo.satnum = UbxSol.numSV; |
||
144 | GPSInfo.PAcc = UbxSol.PAcc; |
||
145 | GPSInfo.VAcc = UbxSol.SAcc; |
||
146 | // NAV POSLLH |
||
147 | GPSInfo.longitude = UbxPosLlh.LON; |
||
148 | GPSInfo.latitude = UbxPosLlh.LAT; |
||
149 | GPSInfo.altitude = UbxPosLlh.HEIGHT; |
||
150 | |||
151 | GPSInfo.veleast = UbxVelNed.VEL_E; |
||
152 | GPSInfo.velnorth = UbxVelNed.VEL_N; |
||
153 | GPSInfo.veltop = -UbxVelNed.VEL_D; |
||
154 | GPSInfo.velground = UbxVelNed.GSpeed; |
||
155 | |||
156 | GPSInfo.status = NEWDATA; |
||
157 | |||
158 | } |
||
159 | // set state to collect new data |
||
160 | UbxSol.Status = PROCESSED; // never update old data |
||
161 | UbxPosLlh.Status = PROCESSED; // never update old data |
||
162 | UbxVelNed.Status = PROCESSED; // never update old data |
||
163 | } |
||
164 | |||
165 | |||
166 | } |
||
167 | |||
168 | |||
169 | // this function should be called within the UART RX ISR |
||
170 | void ubx_parser(uint8_t c) |
||
171 | { |
||
172 | static uint8_t ubxstate = UBXSTATE_IDLE; |
||
173 | static uint8_t cka, ckb; |
||
174 | static uint16_t msglen; |
||
175 | static int8_t *ubxP, *ubxEp, *ubxSp; // pointers to data currently transfered |
||
176 | |||
177 | switch(ubxstate) |
||
178 | { |
||
179 | case UBXSTATE_IDLE: // check 1st sync byte |
||
180 | if (c == UBX_SYNC1_CHAR) ubxstate = UBXSTATE_SYNC1; |
||
181 | else ubxstate = UBXSTATE_IDLE; // out of synchronization |
||
182 | break; |
||
183 | |||
184 | case UBXSTATE_SYNC1: // check 2nd sync byte |
||
185 | if (c == UBX_SYNC2_CHAR) ubxstate = UBXSTATE_SYNC2; |
||
186 | else ubxstate = UBXSTATE_IDLE; // out of synchronization |
||
187 | break; |
||
188 | |||
189 | case UBXSTATE_SYNC2: // check msg class to be NAV |
||
190 | if (c == UBX_CLASS_NAV) ubxstate = UBXSTATE_CLASS; |
||
191 | else ubxstate = UBXSTATE_IDLE; // unsupported message class |
||
192 | break; |
||
193 | |||
194 | case UBXSTATE_CLASS: // check message identifier |
||
195 | switch(c) |
||
196 | { |
||
197 | case UBX_ID_POSLLH: // geodetic position |
||
198 | ubxP = (int8_t *)&UbxPosLlh; // data start pointer |
||
199 | ubxEp = (int8_t *)(&UbxPosLlh + 1); // data end pointer |
||
200 | ubxSp = (int8_t *)&UbxPosLlh.Status; // status pointer |
||
201 | break; |
||
202 | |||
203 | case UBX_ID_SOL: // navigation solution |
||
204 | ubxP = (int8_t *)&UbxSol; // data start pointer |
||
205 | ubxEp = (int8_t *)(&UbxSol + 1); // data end pointer |
||
206 | ubxSp = (int8_t *)&UbxSol.Status; // status pointer |
||
207 | break; |
||
208 | |||
209 | case UBX_ID_VELNED: // velocity vector in tangent plane |
||
210 | ubxP = (int8_t *)&UbxVelNed; // data start pointer |
||
211 | ubxEp = (int8_t *)(&UbxVelNed + 1); // data end pointer |
||
212 | ubxSp = (int8_t *)&UbxVelNed.Status; // status pointer |
||
213 | break; |
||
214 | |||
215 | default: // unsupported identifier |
||
216 | ubxstate = UBXSTATE_IDLE; |
||
217 | break; |
||
218 | } |
||
219 | if (ubxstate != UBXSTATE_IDLE) |
||
220 | { |
||
221 | ubxstate = UBXSTATE_LEN1; |
||
222 | cka = UBX_CLASS_NAV + c; |
||
223 | ckb = UBX_CLASS_NAV + cka; |
||
224 | } |
||
225 | break; |
||
226 | |||
227 | case UBXSTATE_LEN1: // 1st message length byte |
||
228 | msglen = c; |
||
229 | cka += c; |
||
230 | ckb += cka; |
||
231 | ubxstate = UBXSTATE_LEN2; |
||
232 | break; |
||
233 | |||
234 | case UBXSTATE_LEN2: // 2nd message length byte |
||
235 | msglen += ((uint16_t)c)<<8; |
||
236 | cka += c; |
||
237 | ckb += cka; |
||
238 | // if the old data are not processed so far then break parsing now |
||
239 | // to avoid writing new data in ISR during reading by another function |
||
240 | if ( *ubxSp == NEWDATA ) |
||
241 | { |
||
242 | UpdateGPSInfo(); //update GPS info respectively |
||
243 | ubxstate = UBXSTATE_IDLE; |
||
244 | } |
||
245 | else // data invalid or allready processd |
||
246 | { |
||
247 | *ubxSp = INVALID; |
||
248 | ubxstate = UBXSTATE_DATA; |
||
249 | } |
||
250 | break; |
||
251 | |||
252 | case UBXSTATE_DATA: |
||
253 | if (ubxP < ubxEp) *ubxP++ = c; // copy curent data byte if any space is left |
||
254 | cka += c; |
||
255 | ckb += cka; |
||
256 | if (--msglen == 0) ubxstate = UBXSTATE_CKA; // switch to next state if all data was read |
||
257 | break; |
||
258 | |||
259 | case UBXSTATE_CKA: |
||
260 | if (c == cka) ubxstate = UBXSTATE_CKB; |
||
261 | else |
||
262 | { |
||
263 | *ubxSp = INVALID; |
||
264 | ubxstate = UBXSTATE_IDLE; |
||
265 | } |
||
266 | break; |
||
267 | |||
268 | case UBXSTATE_CKB: |
||
269 | if (c == ckb) |
||
270 | { |
||
271 | *ubxSp = NEWDATA; // new data are valid |
||
272 | UpdateGPSInfo(); //update GPS info respectively |
||
273 | GPSTimeout = 255; |
||
274 | } |
||
275 | else |
||
276 | { // if checksum not fit then set data invalid |
||
277 | *ubxSp = INVALID; |
||
278 | } |
||
279 | ubxstate = UBXSTATE_IDLE; // ready to parse new data |
||
280 | break; |
||
281 | |||
282 | default: // unknown ubx state |
||
283 | ubxstate = UBXSTATE_IDLE; |
||
284 | break; |
||
285 | } |
||
286 | |||
287 | } |
||
288 | |||
289 |