| 0,0 → 1,639 |
|---|
| /* |
| This program (files gps.c and gps.h) is free software; you can redistribute it and/or modify |
| it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; |
| either version 3 of the License, or (at your option) any later version. |
| This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; |
| without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License and GNU Lesser General Public License for more details. |
| You should have received a copy of GNU General Public License (License_GPL.txt) and |
| GNU Lesser General Public License (License_LGPL.txt) along with this program. |
| If not, see <http://www.gnu.org/licenses/>. |
| |
| Please note: All the other files for the project "Mikrokopter" by H.Buss are under the license (license_buss.txt) published by www.mikrokopter.de |
| */ |
| /*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| Peter Muehlenbrock |
| Auswertung der Daten vom GPS im ublox Format |
| Hold Modus mit PID Regler |
| Rückstuerz zur Basis Funktion |
| Stand 24.10.2007 |
| Anederung: 24.10. Altitude in relativer Position jetzt auch drin |
| ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| */ |
| #include "main.h" |
| //#include "gps.h" |
| |
| // Defines fuer ublox Messageformat um Auswertung zu steuern |
| #define UBLOX_IDLE 0 |
| #define UBLOX_SYNC1 1 |
| #define UBLOX_SYNC2 2 |
| #define UBLOX_CLASS 3 |
| #define UBLOX_ID 4 |
| #define UBLOX_LEN1 5 |
| #define UBLOX_LEN2 6 |
| #define UBLOX_CKA 7 |
| #define UBLOX_CKB 8 |
| #define UBLOX_PAYLOAD 9 |
| |
| // ublox Protokoll Identifier |
| #define UBLOX_NAV_POSUTM 0x08 |
| #define UBLOX_NAV_STATUS 0x03 |
| #define UBLOX_NAV_VELED 0x12 |
| #define UBLOX_NAV_CLASS 0x01 |
| #define UBLOX_SYNCH1_CHAR 0xB5 |
| #define UBLOX_SYNCH2_CHAR 0x62 |
| |
| signed int GPS_Nick = 0; |
| signed int GPS_Roll = 0; |
| short int ublox_msg_state = UBLOX_IDLE; |
| static uint8_t chk_a =0; //Checksum |
| static uint8_t chk_b =0; |
| short int gps_state,gps_sub_state; //Zustaende der Statemachine |
| short int gps_updte_flag; |
| signed int GPS_hdng_abs_2trgt; //Winkel zum Ziel bezogen auf Nordpol |
| signed int GPS_hdng_rel_2trgt; //Winkel zum Ziel bezogen auf Nordachse des Kopters |
| signed int GPS_dist_2trgt; //vorzeichenlose Distanz zum Ziel |
| signed int gps_int_x,gps_int_y,gps_reg_x,gps_reg_y; |
| static unsigned int rx_len; |
| static unsigned int ptr_payload_data_end; |
| unsigned int gps_alive_cnt; // Wird bei jedem gueltigen GPS Telegramm hochgezaehlt |
| signed int hdng_2home,dist_2home; //Richtung und Entfernung zur home Position |
| static signed gps_tick; //wird bei jedem Update durch das GPS Modul hochgezaehlt |
| static short int hold_fast,hold_reset_int; //Flags fuer Hold Regler |
| static uint8_t *ptr_payload_data; |
| static uint8_t *ptr_pac_status; |
| long int dist_flown; |
| |
| short int Get_GPS_data(void); |
| |
| NAV_POSUTM_t actual_pos; // Aktuelle Nav Daten werden hier im ublox Format abgelegt |
| NAV_STATUS_t actual_status; // Aktueller Nav Status |
| NAV_VELNED_t actual_speed; // Aktueller Geschwindigkeits und Richtungsdaten |
| |
| GPS_ABS_POSITION_t gps_act_position; // Alle wichtigen Daten zusammengefasst |
| GPS_ABS_POSITION_t gps_home_position; // Die Startposition, beim Kalibrieren ermittelt |
| GPS_REL_POSITION_t gps_rel_act_position; // Die aktuelle relative Position bezogen auf Home Position |
| GPS_REL_POSITION_t gps_rel_hold_position; // Die gespeicherte Sollposition fuer GPS_ Hold Mode |
| GPS_REL_POSITION_t gps_rel_start_position; // Die gespeicherte Ausgangsposition fuer GPS_ Home Mode |
| |
| // Initialisierung |
| void GPS_Neutral(void) |
| { |
| ublox_msg_state = UBLOX_IDLE; |
| gps_state = GPS_CRTL_IDLE; |
| gps_sub_state = GPS_CRTL_IDLE; |
| actual_pos.status = 0; |
| actual_speed.status = 0; |
| actual_status.status = 0; |
| gps_home_position.status = 0; // Noch keine gueltige Home Position |
| gps_act_position.status = 0; |
| gps_rel_act_position.status = 0; |
| GPS_Nick = 0; |
| GPS_Roll = 0; |
| gps_updte_flag = 0; |
| gps_int_x = 0; |
| gps_int_y = 0; |
| gps_alive_cnt = 0; |
| } |
| |
| // Home Position sichern falls Daten verfuegbar sind. |
| void GPS_Save_Home(void) |
| { |
| short int n; |
| n = Get_GPS_data(); |
| if (n == 0) // Gueltige und aktuelle Daten ? |
| { |
| // Neue GPS Daten liegen vor |
| gps_home_position.utm_east = gps_act_position.utm_east; |
| gps_home_position.utm_north = gps_act_position.utm_north; |
| gps_home_position.utm_alt = gps_act_position.utm_alt; |
| gps_home_position.status = 1; // Home Position gueltig |
| } |
| } |
| |
| // Relative Position zur Home Position bestimmen |
| // Rueckgabewert 0= Daten sind aktuell und gueltig. 1= Keine Aenderung. 2= Daten ungueltig |
| short int Get_Rel_Position(void) |
| { |
| short int n = 0; |
| n = Get_GPS_data(); |
| if (n >=1) return (n); // nix zu tun, weil keine neue Daten da sind |
| if (gps_alive_cnt < 400) gps_alive_cnt += 300; // Timeoutzaehler. Wird in Motorregler Routine ueberwacht und dekrementiert |
| if (gps_home_position.status > 0) //Nur wenn Home Position vorliegt |
| { |
| gps_rel_act_position.utm_east = (int) (gps_act_position.utm_east - gps_home_position.utm_east); |
| gps_rel_act_position.utm_north = (int) (gps_act_position.utm_north - gps_home_position.utm_north); |
| gps_rel_act_position.utm_alt = (int) (gps_act_position.utm_alt - gps_home_position.utm_alt); |
| gps_rel_act_position.status = 1; // gueltige Positionsdaten |
| n = 0; |
| gps_updte_flag = 1; // zeigt an, dass neue Daten vorliegen. |
| } |
| else |
| { |
| n = 2; //keine gueltigen Daten vorhanden |
| gps_rel_act_position.status = 0; //keine gueltige Position weil keine home Position da ist. |
| } |
| return (n); |
| } |
| |
| // Daten aus aktuellen ublox Messages extrahieren |
| // Rueckgabewert 0= Daten sind aktuell und gueltig. 1= Keine Aenderung. 2= Daten ungueltig |
| short int Get_GPS_data(void) |
| { |
| short int n = 1; |
| |
| if (actual_pos.status == 0) return (1); //damit es schnell geht, wenn nix zu tun ist |
| if ((actual_pos.status > 0) && (actual_status.status > 0) && (actual_speed.status > 0)) |
| { |
| if (((actual_status.gpsfix_type & 0x03) >=2) && ((actual_status.nav_status_flag & 0x01) >=1)) // nur wenn Daten aktuell und gueltig sind |
| { |
| gps_act_position.utm_east = actual_pos.utm_east/10; |
| gps_act_position.utm_north = actual_pos.utm_north/10; |
| gps_act_position.utm_alt = actual_pos.utm_alt/10; |
| gps_act_position.speed_gnd = actual_speed.speed_gnd/10; |
| gps_act_position.speed_gnd = actual_speed.speed_gnd/10; |
| gps_act_position.heading = actual_speed.heading/100000; |
| gps_act_position.status = 1; |
| n = 0; //Daten gueltig |
| } |
| else |
| { |
| gps_act_position.status = 0; //Keine gueltigen Daten |
| n = 2; |
| } |
| actual_pos.status = 0; //neue ublox Messages anfordern |
| actual_status.status = 0; |
| actual_speed.status = 0; |
| } |
| return (n); |
| } |
| |
| /* |
| Daten vom GPS im ublox MSG Format auswerten |
| Die Routine wird bei jedem Empfang eines Zeichens vom GPS Modul durch den UART IRQ aufgerufen |
| // Die UBX Messages NAV_POSUTM, NAV_STATUS und NAV_VALED muessen aktiviert sein |
| */ |
| void Get_Ublox_Msg(uint8_t rx) |
| { |
| switch (ublox_msg_state) |
| { |
| |
| case UBLOX_IDLE: // Zuerst Synchcharacters pruefen |
| if ( rx == UBLOX_SYNCH1_CHAR ) ublox_msg_state = UBLOX_SYNC1; |
| else ublox_msg_state = UBLOX_IDLE; |
| break; |
| |
| case UBLOX_SYNC1: |
| |
| if (rx == UBLOX_SYNCH2_CHAR) ublox_msg_state = UBLOX_SYNC2; |
| else ublox_msg_state = UBLOX_IDLE; |
| chk_a = 0,chk_b = 0; |
| break; |
| |
| case UBLOX_SYNC2: |
| if (rx == UBLOX_NAV_CLASS) ublox_msg_state = UBLOX_CLASS; |
| else ublox_msg_state = UBLOX_IDLE; |
| break; |
| |
| case UBLOX_CLASS: // Nur NAV Meldungen auswerten |
| switch (rx) |
| { |
| case UBLOX_NAV_POSUTM: |
| ptr_pac_status = &actual_pos.status; |
| if (*ptr_pac_status > 0) ublox_msg_state = UBLOX_IDLE; //Abbruch weil Daten noch nicht verwendet wurden |
| else |
| { |
| ptr_payload_data = &actual_pos; |
| ptr_payload_data_end = &actual_pos.status; |
| ublox_msg_state = UBLOX_LEN1; |
| } |
| break; |
| |
| case UBLOX_NAV_STATUS: |
| ptr_pac_status = &actual_status.status; |
| if (*ptr_pac_status > 0) ublox_msg_state = UBLOX_IDLE; |
| else |
| { |
| ptr_payload_data = &actual_status; |
| ptr_payload_data_end = &actual_status.status; |
| ublox_msg_state = UBLOX_LEN1; |
| } |
| break; |
| |
| case UBLOX_NAV_VELED: |
| ptr_pac_status = &actual_speed.status; |
| if (*ptr_pac_status > 0) ublox_msg_state = UBLOX_IDLE; |
| else |
| { |
| ptr_payload_data = &actual_speed; |
| ptr_payload_data_end = &actual_speed.status; |
| ublox_msg_state = UBLOX_LEN1; |
| } |
| break; |
| |
| default: |
| ublox_msg_state = UBLOX_IDLE; |
| break; |
| } |
| chk_a = UBLOX_NAV_CLASS + rx; |
| chk_b = UBLOX_NAV_CLASS + chk_a; |
| break; |
| |
| case UBLOX_LEN1: // Laenge auswerten |
| rx_len = rx; |
| chk_a += rx; |
| chk_b += chk_a; |
| ublox_msg_state = UBLOX_LEN2; |
| break; |
| |
| |
| case UBLOX_LEN2: // Laenge auswerten |
| rx_len = rx_len + (rx *256); // Laenge ermitteln |
| chk_a += rx; |
| chk_b += chk_a; |
| ublox_msg_state = UBLOX_PAYLOAD; |
| break; |
| |
| case UBLOX_PAYLOAD: // jetzt Nutzdaten einlesen |
| if (rx_len > 0) |
| { |
| *ptr_payload_data = rx; |
| chk_a += rx; |
| chk_b += chk_a; |
| --rx_len; |
| if ((rx_len > 0) && (ptr_payload_data <= ptr_payload_data_end)) |
| { |
| ptr_payload_data++; |
| ublox_msg_state = UBLOX_PAYLOAD; |
| } |
| else ublox_msg_state = UBLOX_CKA; |
| } |
| else ublox_msg_state = UBLOX_IDLE; // Abbruch wegen Fehler |
| break; |
| |
| case UBLOX_CKA: // Checksum pruefen |
| if (rx == chk_a) ublox_msg_state = UBLOX_CKB; |
| else ublox_msg_state = UBLOX_IDLE; // Abbruch wegen Fehler |
| break; |
| |
| case UBLOX_CKB: // Checksum pruefen |
| if (rx == chk_b) *ptr_pac_status = 1; // Paket ok |
| ublox_msg_state = UBLOX_IDLE; |
| break; |
| |
| default: |
| ublox_msg_state = UBLOX_IDLE; |
| break; |
| } |
| } |
| |
| //Zentrale Statemachine fuer alle GPS relevanten Regelungsablauefe |
| short int GPS_CRTL(short int cmd) |
| { |
| static unsigned int cnt; //Zaehler fuer diverse Verzoegerungen |
| static signed int int_east,int_north; //Integrierer |
| static signed int dist_north,dist_east; |
| static signed int diff_east,diff_north; // Differenzierer (Differenz zum vorhergehenden x bzw. y Wert) |
| static signed int diff_east_f,diff_north_f; // Differenzierer, gefiltert |
| signed int n,diff_v; |
| static signed int gps_g2t_act_v; // Aktuelle Geschwindigkeitsvorgabe fuer Home Funktion |
| long signed int dev,n_l; |
| signed int dist_frm_start_east,dist_frm_start_north; |
| switch (cmd) |
| { |
| |
| case GPS_CMD_REQ_HOME: // Es soll zum Startpunkt zurueckgeflogen werden. |
| if ((gps_state != GPS_CRTL_HOLD_ACTIVE) && (gps_state != GPS_CRTL_HOME_ACTIVE)) |
| { |
| cnt++; |
| if (cnt > 500) // erst nach Verzoegerung |
| { |
| // Erst mal initialisieren |
| cnt = 0; |
| gps_tick = 0; |
| hold_fast = 0; |
| hold_reset_int = 0; // Integrator enablen |
| int_east = 0, int_north = 0; |
| gps_reg_x = 0, gps_reg_y = 0; |
| dist_east = 0, dist_north = 0; |
| diff_east_f = 0, diff_north_f= 0; |
| diff_east = 0, diff_north = 0; |
| dist_flown = 0; |
| gps_g2t_act_v = 0; |
| gps_sub_state = GPS_CRTL_IDLE; |
| // aktuelle positionsdaten abspeichern |
| if (gps_rel_act_position.status > 0) |
| { |
| gps_rel_start_position.utm_east = gps_rel_act_position.utm_east; |
| gps_rel_start_position.utm_north= gps_rel_act_position.utm_north; |
| gps_rel_start_position.status = 1; // gueltige Positionsdaten |
| gps_rel_hold_position.utm_east = gps_rel_act_position.utm_east; |
| gps_rel_hold_position.utm_north = gps_rel_act_position.utm_north; |
| gps_rel_hold_position.status = 1; // gueltige Positionsdaten |
| //Richtung zur Home Position bezogen auf Nordpol bestimmen |
| hdng_2home = arctan_i(-gps_rel_start_position.utm_east,-gps_rel_start_position.utm_north); |
| // in Winkel 0...360 Grad umrechnen |
| if (( gps_rel_start_position.utm_east < 0)) hdng_2home = ( 90-hdng_2home); |
| else hdng_2home = (270 - hdng_2home); |
| dist_2home = (int) get_dist(gps_rel_start_position.utm_east,gps_rel_start_position.utm_north,hdng_2home); //Entfernung zur Home Position bestimmen |
| gps_state = GPS_CRTL_HOME_ACTIVE; |
| return (GPS_STST_OK); |
| } |
| else |
| { |
| gps_rel_start_position.status = 0; //Keine Daten verfuegbar |
| gps_state = GPS_CRTL_IDLE; |
| return(GPS_STST_ERR); // Keine Daten da |
| } |
| } |
| else return(GPS_STST_PEND); // noch warten |
| } |
| break; |
| // ****************************** |
| |
| case GPS_CMD_REQ_HOLD: // Die Lageregelung soll aktiviert werden. |
| if (gps_state != GPS_CRTL_HOLD_ACTIVE) |
| { |
| cnt++; |
| if (cnt > 500) // erst nach Verzoegerung |
| { |
| cnt = 0; |
| // aktuelle positionsdaten abspeichern |
| if (gps_rel_act_position.status > 0) |
| { |
| hold_fast = 0; |
| hold_reset_int = 0; // Integrator enablen |
| int_east = 0, int_north = 0; |
| gps_reg_x = 0, gps_reg_y = 0; |
| dist_east = 0, dist_north = 0; |
| diff_east_f = 0, diff_north_f= 0; |
| diff_east = 0, diff_north = 0; |
| gps_rel_hold_position.utm_east = gps_rel_act_position.utm_east; |
| gps_rel_hold_position.utm_north = gps_rel_act_position.utm_north; |
| gps_rel_hold_position.status = 1; // gueltige Positionsdaten |
| gps_state = GPS_CRTL_HOLD_ACTIVE; |
| return (GPS_STST_OK); |
| } |
| else |
| { |
| gps_rel_hold_position.status = 0; //Keine Daten verfuegbar |
| gps_state = GPS_CRTL_IDLE; |
| return(GPS_STST_ERR); // Keine Daten da |
| } |
| } |
| else return(GPS_STST_PEND); // noch warten |
| } |
| break; |
| |
| case GPS_CMD_STOP: // Lageregelung beenden |
| cnt = 0; |
| GPS_Nick = 0; |
| GPS_Roll = 0; |
| gps_int_x = 0; |
| gps_int_y = 0; |
| gps_sub_state = GPS_CRTL_IDLE; |
| gps_state = GPS_CRTL_IDLE; |
| return (GPS_STST_OK); |
| break; |
| |
| default: |
| return (GPS_STST_ERR); |
| break; |
| } |
| |
| switch (gps_state) |
| { |
| case GPS_CRTL_IDLE: |
| cnt = 0; |
| return (GPS_STST_OK); |
| break; |
| |
| case GPS_CRTL_HOME_ACTIVE: // Rueckflug zur Basis |
| //Der Sollwert des Lagereglers wird der Homeposition angenaehert |
| if (gps_rel_start_position.status >0) |
| { |
| if ((gps_updte_flag > 0) && (gps_sub_state !=GPS_HOME_FINISHED)) // nur wenn neue GPS Daten vorliegen und nicht schon alles fertig ist |
| { |
| gps_tick++; |
| int d1,d2,d3; |
| d1 = abs (gps_rel_hold_position.utm_east - gps_rel_act_position.utm_east ); |
| d2 = abs (gps_rel_hold_position.utm_north - gps_rel_act_position.utm_north ); |
| d3 = (dist_2home - (int)dist_flown); // Restdistanz zum Ziel |
| |
| if (d3 > GPS_G2T_DIST_MAX_STOP) // Schneller Rueckflug, noch weit weg vom Ziel |
| { |
| if ((d1 < GPS_G2T_FAST_TOL) && (d2 < GPS_G2T_FAST_TOL)) //nur weiter wenn Lage innerhalb der Toleranz |
| { |
| if (gps_g2t_act_v < GPS_G2T_V_MAX) gps_g2t_act_v++; //Geschwindigkeit langsam erhoehen |
| dist_flown +=(long)gps_g2t_act_v; // Vorgabe der Strecke anhand der Geschwindigkeit |
| gps_sub_state = GPS_HOME_FAST_IN_TOL; |
| } |
| else //Den Lageregler in Ruhe arbeiten lassen weil ausserhalb der Toleranz |
| { |
| if (gps_g2t_act_v > 1) gps_g2t_act_v--; // Geschwindigkeit reduzieren |
| dist_flown++; //Auch ausserhalb der Toleranz langsam erhoehen |
| gps_sub_state = GPS_HOME_FAST_OUTOF_TOL; |
| } |
| hold_reset_int = 0; // Integrator einsschalten |
| hold_fast = 1; // Regler fuer schnellen Flug |
| dist_frm_start_east = (int)((dist_flown * (long)sin_i(hdng_2home))/1000); |
| dist_frm_start_north = (int)((dist_flown * (long)cos_i(hdng_2home))/1000); |
| gps_rel_hold_position.utm_east = gps_rel_start_position.utm_east + dist_frm_start_east; //naechster Zielpunkt |
| gps_rel_hold_position.utm_north = gps_rel_start_position.utm_north + dist_frm_start_north; //naechster Zielpunkt |
| } |
| else if (d3 > GPS_G2T_DIST_HOLD) //Das Ziel naehert sich, deswegen abbremsen |
| { |
| if ((d1 < GPS_G2T_NRML_TOL) && (d2 < GPS_G2T_NRML_TOL)) |
| { |
| dist_flown += GPS_G2T_V_RAMP_DWN; // Vorgabe der Strecke anhand der Geschwindigkeit |
| gps_sub_state = GPS_HOME_RMPDWN_IN_TOL; |
| } |
| else |
| { |
| dist_flown++; //Auch ausserhalb der Toleranz langsam erhoehen |
| gps_sub_state = GPS_HOME_RMPDWN_OUTOF_TOL; |
| } |
| hold_reset_int = 0; // Integrator ausschalten |
| hold_fast = 1; // Wieder normal regeln |
| dist_frm_start_east = (int)((dist_flown * (long)sin_i(hdng_2home))/1000); |
| dist_frm_start_north = (int)((dist_flown * (long)cos_i(hdng_2home))/1000); |
| gps_rel_hold_position.utm_east = gps_rel_start_position.utm_east + dist_frm_start_east; //naechster Zielpunkt |
| gps_rel_hold_position.utm_north = gps_rel_start_position.utm_north + dist_frm_start_north; //naechster Zielpunkt |
| } |
| else //Soll-Ziel fast erreicht, Jetzt noch Reste ausgleichen, weil Zielpunkt nicht exakt bestimmt werden konnte (Fehler in Winkelfkt) |
| { |
| if ((d1 < GPS_G2T_NRML_TOL) && (d2 < GPS_G2T_NRML_TOL)) // Jetzt bis zum Zielpunkt regeln |
| { |
| gps_sub_state = GPS_HOME_IN_TOL; |
| hold_fast = 0; // Wieder normal regeln |
| hold_reset_int = 0; // Integrator wieder aktivieren |
| if (gps_rel_hold_position.utm_east >= GPS_G2T_V_MIN) gps_rel_hold_position.utm_east -= GPS_G2T_V_MIN; |
| else if (gps_rel_hold_position.utm_east <= -GPS_G2T_V_MIN ) gps_rel_hold_position.utm_east += GPS_G2T_V_MIN; |
| if (gps_rel_hold_position.utm_north >= GPS_G2T_V_MIN) gps_rel_hold_position.utm_north -= GPS_G2T_V_MIN; |
| else if (gps_rel_hold_position.utm_north <= - GPS_G2T_V_MIN ) gps_rel_hold_position.utm_north += GPS_G2T_V_MIN; |
| if ((abs(gps_rel_hold_position.utm_east) <= GPS_G2T_V_MIN) && (abs(gps_rel_hold_position.utm_north) <=GPS_G2T_V_MIN)) |
| { |
| gps_rel_hold_position.utm_east = 0; |
| gps_rel_hold_position.utm_north = 0; |
| gps_sub_state = GPS_HOME_FINISHED; |
| } |
| } |
| else gps_sub_state = GPS_HOME_OUTOF_TOL; |
| } |
| } |
| gps_state = GPS_CRTL_HOLD_ACTIVE; //Zwischensprung |
| return (GPS_STST_OK); |
| } |
| else // Keine GPS Daten verfuegbar, deswegen Abbruch |
| { |
| gps_state = GPS_CRTL_IDLE; |
| return (GPS_STST_ERR); |
| } |
| break; |
| |
| |
| case GPS_CRTL_HOLD_ACTIVE: // Hier werden die Daten fuer Nick und Roll errechnet |
| if (gps_updte_flag >0) // nur wenn neue GPS Daten vorliegen |
| { |
| gps_updte_flag = 0; |
| // ab hier wird geregelt |
| diff_east = -dist_east; //Alten Wert fuer Differenzier schon mal abziehen |
| diff_north = -dist_north; |
| dist_east = gps_rel_hold_position.utm_east - gps_rel_act_position.utm_east; |
| dist_north = gps_rel_hold_position.utm_north - gps_rel_act_position.utm_north; |
| int_east += dist_east; |
| int_north += dist_north; |
| diff_east += dist_east; // Differenz zur vorhergehenden East Position |
| diff_north += dist_north; // Differenz zur vorhergehenden North Position |
| |
| if (hold_fast > 0) // wegen Sollpositionsspruengen im Fast Mode Differenzierer daempfen |
| { |
| diff_east_f = ((diff_east_f *2)/3) + (diff_east *1/3); //Differenzierer filtern |
| diff_north_f = ((diff_north_f *2)/3) + (diff_north*1/3); //Differenzierer filtern |
| } |
| else // schwache Filterung |
| { |
| diff_east_f = ((diff_east_f * 1)/4) + ((diff_east *3)/4); //Differenzierer filtern |
| diff_north_f = ((diff_north_f * 1)/4) + ((diff_north*3)/4); //Differenzierer filtern |
| } |
| |
| #define GPSINT_MAX 30000 //neuer Wert ab 7.10.2007 Begrenzung |
| if ((abs(int_east) > GPSINT_MAX) || (abs(int_north)> GPSINT_MAX)) //Bei zu hohem Wert Integrator auf Wert halten |
| { |
| int_east -= dist_east; |
| int_north -= dist_north; |
| } |
| if (hold_reset_int > 0) //Im Schnellen Mode Integrator abschalten |
| { |
| int_east = 0; |
| int_north = 0; |
| } |
| |
| // Variable Verstarkung fuer Differenzierer ermitteln. Je weiter vom Ziel wir entfernt sind |
| // desto groesser wird der Faktor. Es gibt aber einen Maximalwert. Bei 0 ist die Verstaerkung immer 1 |
| signed long dist,int_east1,int_north1; |
| int phi; |
| phi = arctan_i(abs(dist_north),abs(dist_east)); |
| dist = get_dist(dist_east,dist_north,phi); //Zunaechst Entfernung zum Ziel ermitteln |
| |
| if (hold_fast == 0) // je Nach Modus andere Verstaerkungskurve fuer Differenzierer |
| { |
| diff_v = (int)((dist * (GPS_DIFF_NRML_MAX_V - 10)) / GPS_DIFF_NRML_MAX_D) +10; //Verstaerkung * 10 |
| if (diff_v > GPS_DIFF_NRML_MAX_V) diff_v = GPS_DIFF_NRML_MAX_V; //begrenzen |
| } |
| else |
| { |
| diff_v = (int)((dist * (GPS_DIFF_FAST_MAX_V - 10)) / GPS_DIFF_FAST_MAX_D) +10; //Verstaerkung * 10 |
| if (diff_v > GPS_DIFF_FAST_MAX_V) diff_v = GPS_DIFF_FAST_MAX_V; //begrenzen |
| } |
| |
| int diff_p; //Vom Modus abhaengige zusaetzliche Verstaerkung |
| if (hold_fast > 0) diff_p = GPS_PROP_FAST_V; |
| else diff_p = GPS_PROP_NRML_V; |
| |
| //I Werte begrenzen |
| #define INT1_MAX (20 * GPS_V) |
| int_east1 = ((((long)int_east) * Parameter_UserParam2)/32); |
| int_north = ((((long)int_north) * Parameter_UserParam2)/32); |
| if (int_east1 > INT1_MAX) int_east1 = INT1_MAX; //begrenzen |
| else if (int_east1 < -INT1_MAX) int_east1 = -INT1_MAX; |
| if (int_north1 > INT1_MAX) int_north1 = INT1_MAX; //begrenzen |
| else if (int_north1 < -INT1_MAX) int_north1 = -INT1_MAX; |
| |
| //PID Regler Werte aufsummieren |
| gps_reg_x = ((int)int_east1 + ((dist_east * Parameter_UserParam1 * diff_p)/(8*2))+ ((diff_east_f * diff_v * Parameter_UserParam3)/10)); // I + P +D Anteil X Achse |
| gps_reg_y = ((int)int_north1 + ((dist_north * Parameter_UserParam1 * diff_p)/(8*2))+ ((diff_north_f * diff_v * Parameter_UserParam3)/10)); // I + P +D Anteil Y Achse |
| |
| //Ziel-Richtung bezogen auf Nordpol bestimmen |
| GPS_hdng_abs_2trgt = arctan_i(gps_reg_x,gps_reg_y); |
| |
| // in Winkel 0...360 Grad umrechnen |
| if ((gps_reg_x >= 0)) GPS_hdng_abs_2trgt = ( 90-GPS_hdng_abs_2trgt); |
| else GPS_hdng_abs_2trgt = (270 - GPS_hdng_abs_2trgt); |
| |
| // Relative Richtung in bezug auf Nordachse des Kopters errechen |
| n= GyroKomp_Int/GYROKOMP_INC_GRAD_DEFAULT; |
| GPS_hdng_rel_2trgt = GPS_hdng_abs_2trgt - n; |
| if ((GPS_hdng_rel_2trgt >180) && (GPS_hdng_abs_2trgt >=180)) GPS_hdng_rel_2trgt = GPS_hdng_rel_2trgt-360; |
| else if (GPS_hdng_rel_2trgt >180) GPS_hdng_rel_2trgt = 360 - GPS_hdng_rel_2trgt; |
| else if (GPS_hdng_rel_2trgt <-180) GPS_hdng_rel_2trgt = 360 + GPS_hdng_rel_2trgt; |
| |
| // Regelabweichung aus x,y zu Ziel in Distanz umrechnen |
| if (abs(gps_reg_x) > abs(gps_reg_y) ) |
| { |
| dev = (long)gps_reg_x; //Groesseren Wert wegen besserer Genauigkeit nehmen |
| dev = abs((dev *1000) / (long) sin_i(GPS_hdng_abs_2trgt)); |
| } |
| else |
| { |
| dev = (long)gps_reg_y; |
| dev = abs((dev *1000) / (long) cos_i(GPS_hdng_abs_2trgt)); |
| } |
| GPS_dist_2trgt = (int) dev; |
| // Winkel und Distanz in Nick und Rollgroessen umrechnen |
| GPS_Roll = (int) +( (dev * (long) sin_i(GPS_hdng_rel_2trgt))/1000); |
| GPS_Nick = (int) -( (dev * (long) cos_i(GPS_hdng_rel_2trgt))/1000); |
| |
| if (GPS_Roll > (GPS_NICKROLL_MAX * GPS_V)) GPS_Roll = (GPS_NICKROLL_MAX * GPS_V); |
| else if (GPS_Roll < -(GPS_NICKROLL_MAX * GPS_V)) GPS_Roll = -(GPS_NICKROLL_MAX * GPS_V); |
| if (GPS_Nick > (GPS_NICKROLL_MAX * GPS_V)) GPS_Nick = (GPS_NICKROLL_MAX * GPS_V); |
| else if (GPS_Nick < -(GPS_NICKROLL_MAX * GPS_V)) GPS_Nick = -(GPS_NICKROLL_MAX * GPS_V); |
| |
| //Kleine Werte verstaerken, Grosse abschwaechen |
| n = sin_i((GPS_Roll*90)/(GPS_NICKROLL_MAX * GPS_V)); |
| n_l = ((long) GPS_NICKROLL_MAX * (long) n)/1000; |
| GPS_Roll = (int) n_l; |
| n = sin_i((GPS_Nick*90)/(GPS_NICKROLL_MAX * GPS_V)); |
| n_l = ((long) GPS_NICKROLL_MAX * (long) n)/1000; |
| GPS_Nick = (int) n_l; |
| |
| if ((abs(dist_east) > GPS_DIST_MAX) || (abs(dist_north) > GPS_DIST_MAX)) // bei zu grossem Abstand abbrechen |
| { |
| GPS_Roll = 0; |
| GPS_Nick = 0; |
| gps_state = GPS_CRTL_IDLE; |
| return (GPS_STST_ERR); |
| break; |
| } |
| else |
| { |
| if ( cmd == GPS_CMD_REQ_HOME ) gps_state = GPS_CRTL_HOME_ACTIVE; // State umsetzen |
| return (GPS_STST_OK); |
| } |
| } |
| else |
| { |
| if ( cmd == GPS_CMD_REQ_HOME ) gps_state = GPS_CRTL_HOME_ACTIVE; // State umsetzen |
| return (GPS_STST_OK); |
| } |
| break; |
| |
| default: |
| gps_state = GPS_CRTL_IDLE; |
| return (GPS_STST_ERR); |
| break; |
| } |
| return (GPS_STST_ERR); |
| |
| } |
| |