WebSVN - FlightCtrl - Blame - /branches/salvo_gps/Basis

Rev	Author	Line No.	Line
528	salvo	1	/*
		2	This program (files gps.c and gps.h) is free software; you can redistribute it and/or modify
		3	it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation;
		4	either version 3 of the License, or (at your option) any later version.
		5	This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
		6	without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
		7	GNU General Public License and GNU Lesser General Public License for more details.
		8	You should have received a copy of GNU General Public License (License_GPL.txt) and
		9	GNU Lesser General Public License (License_LGPL.txt) along with this program.
		10	If not, see <http://www.gnu.org/licenses/>.
		11
		12	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
		13	*/
		14	/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
		15	Peter Muehlenbrock
		16	Auswertung der Daten vom GPS im ublox Format
		17	Hold Modus mit PID Regler
		18	R�ckstuerz zur Basis Funktion
		19	Stand 24.10.2007
		20	Anederung: 24.10. Altitude in relativer Position jetzt auch drin
		21	++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
		22	*/
		23	#include "main.h"
529	salvo	24	#include "math.h"
528	salvo	25	//#include "gps.h"
		26
		27	// Defines fuer ublox Messageformat um Auswertung zu steuern
		28	#define UBLOX_IDLE 0
		29	#define UBLOX_SYNC1 1
		30	#define UBLOX_SYNC2 2
		31	#define UBLOX_CLASS 3
		32	#define UBLOX_ID 4
		33	#define UBLOX_LEN1 5
		34	#define UBLOX_LEN2 6
		35	#define UBLOX_CKA 7
		36	#define UBLOX_CKB 8
		37	#define UBLOX_PAYLOAD 9
		38
		39	// ublox Protokoll Identifier
		40	#define UBLOX_NAV_POSUTM 0x08
		41	#define UBLOX_NAV_STATUS 0x03
		42	#define UBLOX_NAV_VELED 0x12
		43	#define UBLOX_NAV_CLASS 0x01
		44	#define UBLOX_SYNCH1_CHAR 0xB5
		45	#define UBLOX_SYNCH2_CHAR 0x62
		46
		47	signed int GPS_Nick = 0;
		48	signed int GPS_Roll = 0;
		49	short int ublox_msg_state = UBLOX_IDLE;
		50	static uint8_t chk_a =0; //Checksum
		51	static uint8_t chk_b =0;
		52	short int gps_state,gps_sub_state; //Zustaende der Statemachine
		53	short int gps_updte_flag;
		54	signed int GPS_hdng_abs_2trgt; //Winkel zum Ziel bezogen auf Nordpol
		55	signed int GPS_hdng_rel_2trgt; //Winkel zum Ziel bezogen auf Nordachse des Kopters
		56	signed int GPS_dist_2trgt; //vorzeichenlose Distanz zum Ziel
		57	signed int gps_int_x,gps_int_y,gps_reg_x,gps_reg_y;
		58	static unsigned int rx_len;
		59	static unsigned int ptr_payload_data_end;
		60	unsigned int gps_alive_cnt; // Wird bei jedem gueltigen GPS Telegramm hochgezaehlt
		61	signed int hdng_2home,dist_2home; //Richtung und Entfernung zur home Position
		62	static signed gps_tick; //wird bei jedem Update durch das GPS Modul hochgezaehlt
		63	static short int hold_fast,hold_reset_int; //Flags fuer Hold Regler
		64	static uint8_t *ptr_payload_data;
		65	static uint8_t *ptr_pac_status;
		66	long int dist_flown;
602	salvo	67	unsigned int int_ovfl_cnt; // Zaehler fuer Overflows des Integrators
		68	signed int int_east,int_north; //Integrierer
528	salvo	69
602	salvo	70
528	salvo	71	short int Get_GPS_data(void);
		72
		73	NAV_POSUTM_t actual_pos; // Aktuelle Nav Daten werden hier im ublox Format abgelegt
		74	NAV_STATUS_t actual_status; // Aktueller Nav Status
		75	NAV_VELNED_t actual_speed; // Aktueller Geschwindigkeits und Richtungsdaten
		76
		77	GPS_ABS_POSITION_t gps_act_position; // Alle wichtigen Daten zusammengefasst
		78	GPS_ABS_POSITION_t gps_home_position; // Die Startposition, beim Kalibrieren ermittelt
		79	GPS_REL_POSITION_t gps_rel_act_position; // Die aktuelle relative Position bezogen auf Home Position
		80	GPS_REL_POSITION_t gps_rel_hold_position; // Die gespeicherte Sollposition fuer GPS_ Hold Mode
		81	GPS_REL_POSITION_t gps_rel_start_position; // Die gespeicherte Ausgangsposition fuer GPS_ Home Mode
		82
		83	// Initialisierung
		84	void GPS_Neutral(void)
		85	{
		86	ublox_msg_state = UBLOX_IDLE;
		87	gps_state = GPS_CRTL_IDLE;
		88	gps_sub_state = GPS_CRTL_IDLE;
		89	actual_pos.status = 0;
		90	actual_speed.status = 0;
		91	actual_status.status = 0;
		92	gps_home_position.status = 0; // Noch keine gueltige Home Position
		93	gps_act_position.status = 0;
		94	gps_rel_act_position.status = 0;
		95	GPS_Nick = 0;
		96	GPS_Roll = 0;
		97	gps_updte_flag = 0;
		98	gps_int_x = 0;
		99	gps_int_y = 0;
		100	gps_alive_cnt = 0;
		101	}
		102
		103	// Home Position sichern falls Daten verfuegbar sind.
		104	void GPS_Save_Home(void)
		105	{
		106	short int n;
		107	n = Get_GPS_data();
		108	if (n == 0) // Gueltige und aktuelle Daten ?
		109	{
		110	// Neue GPS Daten liegen vor
		111	gps_home_position.utm_east = gps_act_position.utm_east;
		112	gps_home_position.utm_north = gps_act_position.utm_north;
		113	gps_home_position.utm_alt = gps_act_position.utm_alt;
		114	gps_home_position.status = 1; // Home Position gueltig
		115	}
		116	}
		117
		118	// Relative Position zur Home Position bestimmen
		119	// Rueckgabewert 0= Daten sind aktuell und gueltig. 1= Keine Aenderung. 2= Daten ungueltig
		120	short int Get_Rel_Position(void)
		121	{
		122	short int n = 0;
		123	n = Get_GPS_data();
		124	if (n >=1) return (n); // nix zu tun, weil keine neue Daten da sind
565	salvo	125	if (gps_alive_cnt < 1000) gps_alive_cnt += 600; // Timeoutzaehler. Wird in Motorregler Routine ueberwacht und dekrementiert
528	salvo	126	if (gps_home_position.status > 0) //Nur wenn Home Position vorliegt
		127	{
		128	gps_rel_act_position.utm_east = (int) (gps_act_position.utm_east - gps_home_position.utm_east);
		129	gps_rel_act_position.utm_north = (int) (gps_act_position.utm_north - gps_home_position.utm_north);
		130	gps_rel_act_position.utm_alt = (int) (gps_act_position.utm_alt - gps_home_position.utm_alt);
		131	gps_rel_act_position.status = 1; // gueltige Positionsdaten
		132	n = 0;
		133	gps_updte_flag = 1; // zeigt an, dass neue Daten vorliegen.
		134	}
		135	else
		136	{
		137	n = 2; //keine gueltigen Daten vorhanden
		138	gps_rel_act_position.status = 0; //keine gueltige Position weil keine home Position da ist.
		139	}
		140	return (n);
		141	}
		142
		143	// Daten aus aktuellen ublox Messages extrahieren
		144	// Rueckgabewert 0= Daten sind aktuell und gueltig. 1= Keine Aenderung. 2= Daten ungueltig
		145	short int Get_GPS_data(void)
		146	{
		147	short int n = 1;
		148
		149	if (actual_pos.status == 0) return (1); //damit es schnell geht, wenn nix zu tun ist
		150	if ((actual_pos.status > 0) && (actual_status.status > 0) && (actual_speed.status > 0))
		151	{
		152	if (((actual_status.gpsfix_type & 0x03) >=2) && ((actual_status.nav_status_flag & 0x01) >=1)) // nur wenn Daten aktuell und gueltig sind
		153	{
565	salvo	154	actual_status.status = 0;
528	salvo	155	gps_act_position.utm_east = actual_pos.utm_east/10;
		156	gps_act_position.utm_north = actual_pos.utm_north/10;
		157	gps_act_position.utm_alt = actual_pos.utm_alt/10;
565	salvo	158	actual_pos.status = 0; //neue ublox Messages anfordern
		159	// gps_act_position.speed_gnd = actual_speed.speed_gnd/10;
		160	// gps_act_position.speed_gnd = actual_speed.speed_gnd/10;
		161	// gps_act_position.heading = actual_speed.heading/100000;
		162	actual_speed.status = 0;
528	salvo	163	gps_act_position.status = 1;
		164	n = 0; //Daten gueltig
		165	}
		166	else
		167	{
565	salvo	168	gps_act_position.status = 0; //Keine gueltigen Daten
		169	actual_speed.status = 0;
		170	actual_status.status = 0;
		171	actual_pos.status = 0; //neue ublox Messages anfordern
		172	n = 2;
528	salvo	173	}
		174	}
		175	return (n);
		176	}
		177
		178	/*
		179	Daten vom GPS im ublox MSG Format auswerten
		180	Die Routine wird bei jedem Empfang eines Zeichens vom GPS Modul durch den UART IRQ aufgerufen
		181	// Die UBX Messages NAV_POSUTM, NAV_STATUS und NAV_VALED muessen aktiviert sein
		182	*/
		183	void Get_Ublox_Msg(uint8_t rx)
		184	{
		185	switch (ublox_msg_state)
		186	{
		187
		188	case UBLOX_IDLE: // Zuerst Synchcharacters pruefen
		189	if ( rx == UBLOX_SYNCH1_CHAR ) ublox_msg_state = UBLOX_SYNC1;
		190	else ublox_msg_state = UBLOX_IDLE;
		191	break;
		192
		193	case UBLOX_SYNC1:
		194
		195	if (rx == UBLOX_SYNCH2_CHAR) ublox_msg_state = UBLOX_SYNC2;
		196	else ublox_msg_state = UBLOX_IDLE;
		197	chk_a = 0,chk_b = 0;
		198	break;
		199
		200	case UBLOX_SYNC2:
		201	if (rx == UBLOX_NAV_CLASS) ublox_msg_state = UBLOX_CLASS;
		202	else ublox_msg_state = UBLOX_IDLE;
		203	break;
		204
		205	case UBLOX_CLASS: // Nur NAV Meldungen auswerten
		206	switch (rx)
		207	{
		208	case UBLOX_NAV_POSUTM:
		209	ptr_pac_status = &actual_pos.status;
		210	if (*ptr_pac_status > 0) ublox_msg_state = UBLOX_IDLE; //Abbruch weil Daten noch nicht verwendet wurden
		211	else
		212	{
		213	ptr_payload_data = &actual_pos;
		214	ptr_payload_data_end = &actual_pos.status;
		215	ublox_msg_state = UBLOX_LEN1;
		216	}
		217	break;
		218
		219	case UBLOX_NAV_STATUS:
		220	ptr_pac_status = &actual_status.status;
		221	if (*ptr_pac_status > 0) ublox_msg_state = UBLOX_IDLE;
		222	else
		223	{
		224	ptr_payload_data = &actual_status;
		225	ptr_payload_data_end = &actual_status.status;
		226	ublox_msg_state = UBLOX_LEN1;
		227	}
		228	break;
		229
		230	case UBLOX_NAV_VELED:
		231	ptr_pac_status = &actual_speed.status;
		232	if (*ptr_pac_status > 0) ublox_msg_state = UBLOX_IDLE;
		233	else
		234	{
		235	ptr_payload_data = &actual_speed;
		236	ptr_payload_data_end = &actual_speed.status;
		237	ublox_msg_state = UBLOX_LEN1;
		238	}
		239	break;
		240
		241	default:
		242	ublox_msg_state = UBLOX_IDLE;
		243	break;
		244	}
		245	chk_a = UBLOX_NAV_CLASS + rx;
		246	chk_b = UBLOX_NAV_CLASS + chk_a;
		247	break;
		248
		249	case UBLOX_LEN1: // Laenge auswerten
		250	rx_len = rx;
		251	chk_a += rx;
		252	chk_b += chk_a;
		253	ublox_msg_state = UBLOX_LEN2;
		254	break;
		255
		256
		257	case UBLOX_LEN2: // Laenge auswerten
		258	rx_len = rx_len + (rx *256); // Laenge ermitteln
		259	chk_a += rx;
		260	chk_b += chk_a;
		261	ublox_msg_state = UBLOX_PAYLOAD;
		262	break;
		263
		264	case UBLOX_PAYLOAD: // jetzt Nutzdaten einlesen
		265	if (rx_len > 0)
		266	{
		267	*ptr_payload_data = rx;
		268	chk_a += rx;
		269	chk_b += chk_a;
		270	--rx_len;
		271	if ((rx_len > 0) && (ptr_payload_data <= ptr_payload_data_end))
		272	{
		273	ptr_payload_data++;
		274	ublox_msg_state = UBLOX_PAYLOAD;
		275	}
		276	else ublox_msg_state = UBLOX_CKA;
		277	}
		278	else ublox_msg_state = UBLOX_IDLE; // Abbruch wegen Fehler
		279	break;
		280
		281	case UBLOX_CKA: // Checksum pruefen
		282	if (rx == chk_a) ublox_msg_state = UBLOX_CKB;
		283	else ublox_msg_state = UBLOX_IDLE; // Abbruch wegen Fehler
		284	break;
		285
		286	case UBLOX_CKB: // Checksum pruefen
		287	if (rx == chk_b) *ptr_pac_status = 1; // Paket ok
		288	ublox_msg_state = UBLOX_IDLE;
		289	break;
		290
		291	default:
		292	ublox_msg_state = UBLOX_IDLE;
		293	break;
		294	}
		295	}
		296
		297	//Zentrale Statemachine fuer alle GPS relevanten Regelungsablauefe
		298	short int GPS_CRTL(short int cmd)
		299	{
		300	static unsigned int cnt; //Zaehler fuer diverse Verzoegerungen
		301	static signed int dist_north,dist_east;
		302	static signed int diff_east,diff_north; // Differenzierer (Differenz zum vorhergehenden x bzw. y Wert)
		303	static signed int diff_east_f,diff_north_f; // Differenzierer, gefiltert
		304	signed int n,diff_v;
		305	static signed int gps_g2t_act_v; // Aktuelle Geschwindigkeitsvorgabe fuer Home Funktion
		306	long signed int dev,n_l;
		307	signed int dist_frm_start_east,dist_frm_start_north;
602	salvo	308
528	salvo	309	switch (cmd)
		310	{
		311
		312	case GPS_CMD_REQ_HOME: // Es soll zum Startpunkt zurueckgeflogen werden.
		313	if ((gps_state != GPS_CRTL_HOLD_ACTIVE) && (gps_state != GPS_CRTL_HOME_ACTIVE))
		314	{
		315	cnt++;
565	salvo	316	if (cnt > 200) // erst nach Verzoegerung
528	salvo	317	{
		318	// Erst mal initialisieren
		319	cnt = 0;
		320	gps_tick = 0;
		321	hold_fast = 0;
		322	hold_reset_int = 0; // Integrator enablen
		323	int_east = 0, int_north = 0;
		324	gps_reg_x = 0, gps_reg_y = 0;
		325	dist_east = 0, dist_north = 0;
		326	diff_east_f = 0, diff_north_f= 0;
		327	diff_east = 0, diff_north = 0;
		328	dist_flown = 0;
		329	gps_g2t_act_v = 0;
		330	gps_sub_state = GPS_CRTL_IDLE;
		331	// aktuelle positionsdaten abspeichern
		332	if (gps_rel_act_position.status > 0)
		333	{
		334	gps_rel_start_position.utm_east = gps_rel_act_position.utm_east;
		335	gps_rel_start_position.utm_north= gps_rel_act_position.utm_north;
		336	gps_rel_start_position.status = 1; // gueltige Positionsdaten
		337	gps_rel_hold_position.utm_east = gps_rel_act_position.utm_east;
		338	gps_rel_hold_position.utm_north = gps_rel_act_position.utm_north;
		339	gps_rel_hold_position.status = 1; // gueltige Positionsdaten
		340	//Richtung zur Home Position bezogen auf Nordpol bestimmen
		341	hdng_2home = arctan_i(-gps_rel_start_position.utm_east,-gps_rel_start_position.utm_north);
		342	// in Winkel 0...360 Grad umrechnen
		343	if (( gps_rel_start_position.utm_east < 0)) hdng_2home = ( 90-hdng_2home);
		344	else hdng_2home = (270 - hdng_2home);
		345	dist_2home = (int) get_dist(gps_rel_start_position.utm_east,gps_rel_start_position.utm_north,hdng_2home); //Entfernung zur Home Position bestimmen
		346	gps_state = GPS_CRTL_HOME_ACTIVE;
		347	return (GPS_STST_OK);
		348	}
		349	else
		350	{
		351	gps_rel_start_position.status = 0; //Keine Daten verfuegbar
		352	gps_state = GPS_CRTL_IDLE;
		353	return(GPS_STST_ERR); // Keine Daten da
		354	}
		355	}
		356	else return(GPS_STST_PEND); // noch warten
		357	}
		358	break;
		359	// ******************************
		360
		361	case GPS_CMD_REQ_HOLD: // Die Lageregelung soll aktiviert werden.
		362	if (gps_state != GPS_CRTL_HOLD_ACTIVE)
		363	{
		364	cnt++;
565	salvo	365	if (cnt > 400) // erst nach Verzoegerung
528	salvo	366	{
		367	cnt = 0;
		368	// aktuelle positionsdaten abspeichern
		369	if (gps_rel_act_position.status > 0)
		370	{
		371	hold_fast = 0;
		372	hold_reset_int = 0; // Integrator enablen
		373	int_east = 0, int_north = 0;
		374	gps_reg_x = 0, gps_reg_y = 0;
		375	dist_east = 0, dist_north = 0;
		376	diff_east_f = 0, diff_north_f= 0;
		377	diff_east = 0, diff_north = 0;
602	salvo	378	int_ovfl_cnt = 0;
528	salvo	379	gps_rel_hold_position.utm_east = gps_rel_act_position.utm_east;
		380	gps_rel_hold_position.utm_north = gps_rel_act_position.utm_north;
		381	gps_rel_hold_position.status = 1; // gueltige Positionsdaten
		382	gps_state = GPS_CRTL_HOLD_ACTIVE;
		383	return (GPS_STST_OK);
		384	}
		385	else
		386	{
		387	gps_rel_hold_position.status = 0; //Keine Daten verfuegbar
		388	gps_state = GPS_CRTL_IDLE;
		389	return(GPS_STST_ERR); // Keine Daten da
		390	}
		391	}
		392	else return(GPS_STST_PEND); // noch warten
		393	}
		394	break;
		395
		396	case GPS_CMD_STOP: // Lageregelung beenden
		397	cnt = 0;
		398	GPS_Nick = 0;
		399	GPS_Roll = 0;
		400	gps_int_x = 0;
		401	gps_int_y = 0;
		402	gps_sub_state = GPS_CRTL_IDLE;
		403	gps_state = GPS_CRTL_IDLE;
		404	return (GPS_STST_OK);
		405	break;
		406
		407	default:
		408	return (GPS_STST_ERR);
		409	break;
		410	}
		411
		412	switch (gps_state)
		413	{
		414	case GPS_CRTL_IDLE:
		415	cnt = 0;
		416	return (GPS_STST_OK);
		417	break;
		418
		419	case GPS_CRTL_HOME_ACTIVE: // Rueckflug zur Basis
		420	//Der Sollwert des Lagereglers wird der Homeposition angenaehert
		421	if (gps_rel_start_position.status >0)
		422	{
		423	if ((gps_updte_flag > 0) && (gps_sub_state !=GPS_HOME_FINISHED)) // nur wenn neue GPS Daten vorliegen und nicht schon alles fertig ist
		424	{
		425	gps_tick++;
		426	int d1,d2,d3;
		427	d1 = abs (gps_rel_hold_position.utm_east - gps_rel_act_position.utm_east );
		428	d2 = abs (gps_rel_hold_position.utm_north - gps_rel_act_position.utm_north );
		429	d3 = (dist_2home - (int)dist_flown); // Restdistanz zum Ziel
		430
		431	if (d3 > GPS_G2T_DIST_MAX_STOP) // Schneller Rueckflug, noch weit weg vom Ziel
		432	{
		433	if ((d1 < GPS_G2T_FAST_TOL) && (d2 < GPS_G2T_FAST_TOL)) //nur weiter wenn Lage innerhalb der Toleranz
		434	{
		435	if (gps_g2t_act_v < GPS_G2T_V_MAX) gps_g2t_act_v++; //Geschwindigkeit langsam erhoehen
		436	dist_flown +=(long)gps_g2t_act_v; // Vorgabe der Strecke anhand der Geschwindigkeit
		437	gps_sub_state = GPS_HOME_FAST_IN_TOL;
		438	}
		439	else //Den Lageregler in Ruhe arbeiten lassen weil ausserhalb der Toleranz
		440	{
		441	if (gps_g2t_act_v > 1) gps_g2t_act_v--; // Geschwindigkeit reduzieren
		442	dist_flown++; //Auch ausserhalb der Toleranz langsam erhoehen
		443	gps_sub_state = GPS_HOME_FAST_OUTOF_TOL;
		444	}
		445	hold_reset_int = 0; // Integrator einsschalten
		446	hold_fast = 1; // Regler fuer schnellen Flug
		447	dist_frm_start_east = (int)((dist_flown * (long)sin_i(hdng_2home))/1000);
		448	dist_frm_start_north = (int)((dist_flown * (long)cos_i(hdng_2home))/1000);
		449	gps_rel_hold_position.utm_east = gps_rel_start_position.utm_east + dist_frm_start_east; //naechster Zielpunkt
		450	gps_rel_hold_position.utm_north = gps_rel_start_position.utm_north + dist_frm_start_north; //naechster Zielpunkt
		451	}
		452	else if (d3 > GPS_G2T_DIST_HOLD) //Das Ziel naehert sich, deswegen abbremsen
		453	{
		454	if ((d1 < GPS_G2T_NRML_TOL) && (d2 < GPS_G2T_NRML_TOL))
		455	{
		456	dist_flown += GPS_G2T_V_RAMP_DWN; // Vorgabe der Strecke anhand der Geschwindigkeit
		457	gps_sub_state = GPS_HOME_RMPDWN_IN_TOL;
		458	}
		459	else
		460	{
		461	dist_flown++; //Auch ausserhalb der Toleranz langsam erhoehen
		462	gps_sub_state = GPS_HOME_RMPDWN_OUTOF_TOL;
		463	}
		464	hold_reset_int = 0; // Integrator ausschalten
		465	hold_fast = 1; // Wieder normal regeln
		466	dist_frm_start_east = (int)((dist_flown * (long)sin_i(hdng_2home))/1000);
		467	dist_frm_start_north = (int)((dist_flown * (long)cos_i(hdng_2home))/1000);
		468	gps_rel_hold_position.utm_east = gps_rel_start_position.utm_east + dist_frm_start_east; //naechster Zielpunkt
		469	gps_rel_hold_position.utm_north = gps_rel_start_position.utm_north + dist_frm_start_north; //naechster Zielpunkt
		470	}
		471	else //Soll-Ziel fast erreicht, Jetzt noch Reste ausgleichen, weil Zielpunkt nicht exakt bestimmt werden konnte (Fehler in Winkelfkt)
		472	{
		473	if ((d1 < GPS_G2T_NRML_TOL) && (d2 < GPS_G2T_NRML_TOL)) // Jetzt bis zum Zielpunkt regeln
		474	{
		475	gps_sub_state = GPS_HOME_IN_TOL;
		476	hold_fast = 0; // Wieder normal regeln
		477	hold_reset_int = 0; // Integrator wieder aktivieren
		478	if (gps_rel_hold_position.utm_east >= GPS_G2T_V_MIN) gps_rel_hold_position.utm_east -= GPS_G2T_V_MIN;
		479	else if (gps_rel_hold_position.utm_east <= -GPS_G2T_V_MIN ) gps_rel_hold_position.utm_east += GPS_G2T_V_MIN;
		480	if (gps_rel_hold_position.utm_north >= GPS_G2T_V_MIN) gps_rel_hold_position.utm_north -= GPS_G2T_V_MIN;
		481	else if (gps_rel_hold_position.utm_north <= - GPS_G2T_V_MIN ) gps_rel_hold_position.utm_north += GPS_G2T_V_MIN;
		482	if ((abs(gps_rel_hold_position.utm_east) <= GPS_G2T_V_MIN) && (abs(gps_rel_hold_position.utm_north) <=GPS_G2T_V_MIN))
		483	{
		484	gps_rel_hold_position.utm_east = 0;
		485	gps_rel_hold_position.utm_north = 0;
		486	gps_sub_state = GPS_HOME_FINISHED;
		487	}
		488	}
		489	else gps_sub_state = GPS_HOME_OUTOF_TOL;
		490	}
		491	}
		492	gps_state = GPS_CRTL_HOLD_ACTIVE; //Zwischensprung
		493	return (GPS_STST_OK);
		494	}
		495	else // Keine GPS Daten verfuegbar, deswegen Abbruch
		496	{
		497	gps_state = GPS_CRTL_IDLE;
		498	return (GPS_STST_ERR);
		499	}
		500	break;
		501
		502
		503	case GPS_CRTL_HOLD_ACTIVE: // Hier werden die Daten fuer Nick und Roll errechnet
		504	if (gps_updte_flag >0) // nur wenn neue GPS Daten vorliegen
		505	{
		506	gps_updte_flag = 0;
		507	// ab hier wird geregelt
602	salvo	508	diff_east = -dist_east; //Alten Wert fuer Differenzierer schon mal abziehen
528	salvo	509	diff_north = -dist_north;
		510	dist_east = gps_rel_hold_position.utm_east - gps_rel_act_position.utm_east;
		511	dist_north = gps_rel_hold_position.utm_north - gps_rel_act_position.utm_north;
		512	int_east += dist_east;
		513	int_north += dist_north;
		514	diff_east += dist_east; // Differenz zur vorhergehenden East Position
		515	diff_north += dist_north; // Differenz zur vorhergehenden North Position
		516
		517	if (hold_fast > 0) // wegen Sollpositionsspruengen im Fast Mode Differenzierer daempfen
		518	{
		519	diff_east_f = ((diff_east_f 2)/3) + (diff_east 1/3); //Differenzierer filtern
		520	diff_north_f = ((diff_north_f 2)/3) + (diff_north1/3); //Differenzierer filtern
		521	}
		522	else // schwache Filterung
		523	{
		524	diff_east_f = ((diff_east_f * 1)/4) + ((diff_east *3)/4); //Differenzierer filtern
		525	diff_north_f = ((diff_north_f * 1)/4) + ((diff_north*3)/4); //Differenzierer filtern
		526	}
		527
602	salvo	528	#define GPSINT_MAX 3000 // Neues Verfahren ab 30.12.2007 bei Integratoroverflow
		529	if ((abs(int_east) > GPSINT_MAX) \|\| (abs(int_north)> GPSINT_MAX))
528	salvo	530	{
602	salvo	531	if (int_ovfl_cnt < 40) int_ovfl_cnt += 20; // Zahl der Overflows zaehlen
		532	// int_east -= dist_east; auf alten Wert halten
		533	// int_north -= dist_north;
528	salvo	534	}
602	salvo	535	if (int_ovfl_cnt > 0) //bei Overflow Wert Inetgratorwert reduzieren
		536	{
		537	int_ovfl_cnt -= 1;
		538	int_east = (int_east*7)/8; // Wert reduzieren
		539	int_north = (int_north*7)/8;
		540	}
		541
528	salvo	542	if (hold_reset_int > 0) //Im Schnellen Mode Integrator abschalten
		543	{
		544	int_east = 0;
		545	int_north = 0;
		546	}
		547
602	salvo	548
528	salvo	549	// Variable Verstarkung fuer Differenzierer ermitteln. Je weiter vom Ziel wir entfernt sind
		550	// desto groesser wird der Faktor. Es gibt aber einen Maximalwert. Bei 0 ist die Verstaerkung immer 1
		551	signed long dist,int_east1,int_north1;
		552	int phi;
		553	phi = arctan_i(abs(dist_north),abs(dist_east));
		554	dist = get_dist(dist_east,dist_north,phi); //Zunaechst Entfernung zum Ziel ermitteln
		555
		556	if (hold_fast == 0) // je Nach Modus andere Verstaerkungskurve fuer Differenzierer
		557	{
		558	diff_v = (int)((dist * (GPS_DIFF_NRML_MAX_V - 10)) / GPS_DIFF_NRML_MAX_D) +10; //Verstaerkung * 10
		559	if (diff_v > GPS_DIFF_NRML_MAX_V) diff_v = GPS_DIFF_NRML_MAX_V; //begrenzen
		560	}
		561	else
		562	{
		563	diff_v = (int)((dist * (GPS_DIFF_FAST_MAX_V - 10)) / GPS_DIFF_FAST_MAX_D) +10; //Verstaerkung * 10
		564	if (diff_v > GPS_DIFF_FAST_MAX_V) diff_v = GPS_DIFF_FAST_MAX_V; //begrenzen
		565	}
		566
		567	int diff_p; //Vom Modus abhaengige zusaetzliche Verstaerkung
		568	if (hold_fast > 0) diff_p = GPS_PROP_FAST_V;
		569	else diff_p = GPS_PROP_NRML_V;
		570
		571	//I Werte begrenzen
602	salvo	572	#define INT1_MAX (GPS_NICKROLL_MAX * GPS_V)/2 //ab 30.12.2007 auf Halben Maximalen Nick/Rollwert begrenzen
565	salvo	573	int_east1 = ((((long)int_east) * Parameter_UserParam2)/32)/GPS_USR_PAR_FKT;
		574	int_north1 = ((((long)int_north) * Parameter_UserParam2)/32)/GPS_USR_PAR_FKT; //Fehler behoben am 17.12.2007 vorher int_north=
528	salvo	575	if (int_east1 > INT1_MAX) int_east1 = INT1_MAX; //begrenzen
		576	else if (int_east1 < -INT1_MAX) int_east1 = -INT1_MAX;
		577	if (int_north1 > INT1_MAX) int_north1 = INT1_MAX; //begrenzen
		578	else if (int_north1 < -INT1_MAX) int_north1 = -INT1_MAX;
		579
		580	//PID Regler Werte aufsummieren
542	salvo	581	gps_reg_x = ((int)int_east1 + ((dist_east * (Parameter_UserParam1/GPS_USR_PAR_FKT) * diff_p)/(82))+ ((diff_east_f diff_v * (Parameter_UserParam3/GPS_USR_PAR_FKT))/10)); // I + P +D Anteil X Achse
		582	gps_reg_y = ((int)int_north1 + ((dist_north * (Parameter_UserParam1/GPS_USR_PAR_FKT) * diff_p)/(82))+ ((diff_north_f diff_v * (Parameter_UserParam3/GPS_USR_PAR_FKT))/10)); // I + P +D Anteil Y Achse
528	salvo	583
		584	//Ziel-Richtung bezogen auf Nordpol bestimmen
		585	GPS_hdng_abs_2trgt = arctan_i(gps_reg_x,gps_reg_y);
		586
		587	// in Winkel 0...360 Grad umrechnen
		588	if ((gps_reg_x >= 0)) GPS_hdng_abs_2trgt = ( 90-GPS_hdng_abs_2trgt);
		589	else GPS_hdng_abs_2trgt = (270 - GPS_hdng_abs_2trgt);
		590
		591	// Relative Richtung in bezug auf Nordachse des Kopters errechen
		592	n= GyroKomp_Int/GYROKOMP_INC_GRAD_DEFAULT;
		593	GPS_hdng_rel_2trgt = GPS_hdng_abs_2trgt - n;
		594	if ((GPS_hdng_rel_2trgt >180) && (GPS_hdng_abs_2trgt >=180)) GPS_hdng_rel_2trgt = GPS_hdng_rel_2trgt-360;
		595	else if (GPS_hdng_rel_2trgt >180) GPS_hdng_rel_2trgt = 360 - GPS_hdng_rel_2trgt;
		596	else if (GPS_hdng_rel_2trgt <-180) GPS_hdng_rel_2trgt = 360 + GPS_hdng_rel_2trgt;
		597
		598	// Regelabweichung aus x,y zu Ziel in Distanz umrechnen
		599	if (abs(gps_reg_x) > abs(gps_reg_y) )
		600	{
		601	dev = (long)gps_reg_x; //Groesseren Wert wegen besserer Genauigkeit nehmen
		602	dev = abs((dev *1000) / (long) sin_i(GPS_hdng_abs_2trgt));
		603	}
		604	else
		605	{
		606	dev = (long)gps_reg_y;
		607	dev = abs((dev *1000) / (long) cos_i(GPS_hdng_abs_2trgt));
		608	}
		609	GPS_dist_2trgt = (int) dev;
		610	// Winkel und Distanz in Nick und Rollgroessen umrechnen
		611	GPS_Roll = (int) +( (dev * (long) sin_i(GPS_hdng_rel_2trgt))/1000);
		612	GPS_Nick = (int) -( (dev * (long) cos_i(GPS_hdng_rel_2trgt))/1000);
		613
		614	if (GPS_Roll > (GPS_NICKROLL_MAX * GPS_V)) GPS_Roll = (GPS_NICKROLL_MAX * GPS_V);
		615	else if (GPS_Roll < -(GPS_NICKROLL_MAX * GPS_V)) GPS_Roll = -(GPS_NICKROLL_MAX * GPS_V);
		616	if (GPS_Nick > (GPS_NICKROLL_MAX * GPS_V)) GPS_Nick = (GPS_NICKROLL_MAX * GPS_V);
		617	else if (GPS_Nick < -(GPS_NICKROLL_MAX * GPS_V)) GPS_Nick = -(GPS_NICKROLL_MAX * GPS_V);
		618
		619	//Kleine Werte verstaerken, Grosse abschwaechen
		620	n = sin_i((GPS_Roll90)/(GPS_NICKROLL_MAX GPS_V));
		621	n_l = ((long) GPS_NICKROLL_MAX * (long) n)/1000;
		622	GPS_Roll = (int) n_l;
		623	n = sin_i((GPS_Nick90)/(GPS_NICKROLL_MAX GPS_V));
		624	n_l = ((long) GPS_NICKROLL_MAX * (long) n)/1000;
		625	GPS_Nick = (int) n_l;
		626
		627	if ((abs(dist_east) > GPS_DIST_MAX) \|\| (abs(dist_north) > GPS_DIST_MAX)) // bei zu grossem Abstand abbrechen
		628	{
		629	GPS_Roll = 0;
		630	GPS_Nick = 0;
		631	gps_state = GPS_CRTL_IDLE;
		632	return (GPS_STST_ERR);
		633	break;
		634	}
		635	else
		636	{
		637	if ( cmd == GPS_CMD_REQ_HOME ) gps_state = GPS_CRTL_HOME_ACTIVE; // State umsetzen
		638	return (GPS_STST_OK);
		639	}
		640	}
		641	else
		642	{
		643	if ( cmd == GPS_CMD_REQ_HOME ) gps_state = GPS_CRTL_HOME_ACTIVE; // State umsetzen
		644	return (GPS_STST_OK);
		645	}
		646	break;
		647
		648	default:
		649	gps_state = GPS_CRTL_IDLE;
		650	return (GPS_STST_ERR);
		651	break;
		652	}
		653	return (GPS_STST_ERR);
		654
		655	}
		656

Subversion Repositories FlightCtrl

(root)/branches/salvo_gps/Basis_v0067g/trunk/GPS.c @ 606 - Rev