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Rev | Author | Line No. | Line |
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726 | killagreg | 1 | #include <inttypes.h> |
1 | ingob | 2 | |
726 | killagreg | 3 | #include "fc.h" |
4 | #include "ubx.h" |
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5 | #include "mymath.h" |
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727 | killagreg | 6 | #include "timer0.h" |
741 | killagreg | 7 | #include "uart.h" |
701 | killagreg | 8 | |
741 | killagreg | 9 | #define TSK_IDLE 0 |
10 | #define TSK_HOLD 1 |
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11 | #define TSK_HOME 2 |
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12 | |||
13 | |||
726 | killagreg | 14 | int16_t GPS_Pitch = 0; |
15 | int16_t GPS_Roll = 0; |
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16 | |||
746 | killagreg | 17 | int32_t GPS_P_Factor = 0, GPS_D_Factor = 0; |
18 | int32_t GPSPosDev_North = 0, GPSPosDev_East = 0; |
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726 | killagreg | 19 | |
746 | killagreg | 20 | |
726 | killagreg | 21 | typedef struct |
1 | ingob | 22 | { |
726 | killagreg | 23 | int32_t Northing; |
24 | int32_t Easting; |
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25 | uint8_t Status; |
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1 | ingob | 26 | |
726 | killagreg | 27 | } GPS_Pos_t; |
28 | |||
29 | // GPS coordinates for hold position |
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741 | killagreg | 30 | GPS_Pos_t HoldPosition = {0,0, INVALID}; |
31 | // GPS coordinates for home position |
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32 | GPS_Pos_t HomePosition = {0,0, INVALID}; |
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726 | killagreg | 33 | |
34 | |||
35 | // --------------------------------------------------------------------------------- |
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36 | |||
746 | killagreg | 37 | // set current hold position a home positon |
38 | void GPS_SetHomePosition(void) |
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39 | { |
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40 | HomePosition.Northing = HoldPosition.Northing; |
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41 | HomePosition.Easting = HoldPosition.Easting; |
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42 | HomePosition.Status = HoldPosition.Status; |
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43 | if(HomePosition.Status == VALID) BeepTime = 1000; // signal if new home position was set |
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44 | } |
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726 | killagreg | 45 | |
746 | killagreg | 46 | |
47 | // disable GPS contrl sticks |
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48 | void GPS_Neutral(void) |
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1 | ingob | 49 | { |
746 | killagreg | 50 | GPS_Pitch = 0; |
51 | GPS_Roll = 0; |
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52 | } |
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53 | |||
54 | // calculates the GPS control sticks salues from the position deviation |
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55 | void GPS_PDController(void) |
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56 | { |
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726 | killagreg | 57 | int32_t coscompass, sincompass; |
58 | int32_t P_North = 0, D_North = 0, P_East = 0, D_East = 0; |
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59 | int32_t PD_North = 0, PD_East = 0; |
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746 | killagreg | 60 | //Calculate PD-components of the controller (negative sign for compensation) |
61 | P_North = -(GPS_P_Factor * GPSPosDev_North)/2048; |
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62 | D_North = -(GPS_D_Factor * GPSInfo.velnorth)/512; |
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63 | P_East = -(GPS_P_Factor * GPSPosDev_East)/2048; |
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64 | D_East = -(GPS_D_Factor * GPSInfo.veleast)/512; |
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65 | |||
66 | // PD-controller |
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67 | PD_North = P_North + D_North; |
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68 | PD_East = P_East + D_East; |
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69 | |||
70 | // GPS to pitch and roll settings |
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71 | |||
72 | //A positive pitch angle moves head downwards (flying forward). |
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73 | //A positive roll angle tilts left side downwards (flying left). |
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74 | |||
75 | // If compass heading is 0 the head of the copter is in north direction. |
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76 | // A positive pitch angle will fly to north and a positive roll angle will fly to west. |
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77 | // In case of a positive north deviation/velocity the |
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78 | // copter should fly to south (negative pitch). |
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79 | // In case of a positive east position deviation and a positive east velocity the |
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80 | // copter should fly to west (positive roll). |
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81 | |||
82 | // The influence of the GPS_Pitch and GPS_Roll variable is contrarily to the stick values |
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83 | // in the fc.c. Therefore a positive north deviation/velocity should result in a positive |
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84 | // GPS_Pitch and a positive east deviation/velocity should result in a negative GPS_Roll. |
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85 | |||
86 | // rotation transformation to compass heading to match any copter orientation |
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87 | if (CompassHeading < 0) // no valid compass data |
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88 | { // disable GPS |
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89 | GPS_Neutral(); |
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90 | } |
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91 | else |
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92 | { |
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93 | coscompass = (int32_t)c_cos_8192(CompassHeading); |
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94 | sincompass = (int32_t)c_sin_8192(CompassHeading); |
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95 | GPS_Roll = (int16_t)((coscompass * PD_East - sincompass * PD_North) / 8192); |
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96 | GPS_Pitch = -1*(int16_t)((sincompass * PD_East + coscompass * PD_North) / 8192); |
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97 | } |
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98 | // limit GPS controls |
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99 | #define GPS_CTRL_LIMIT 35 |
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100 | if (GPS_Pitch > GPS_CTRL_LIMIT) GPS_Pitch = GPS_CTRL_LIMIT; |
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101 | if (GPS_Pitch < -GPS_CTRL_LIMIT) GPS_Pitch = -GPS_CTRL_LIMIT; |
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102 | if (GPS_Roll > GPS_CTRL_LIMIT) GPS_Roll = GPS_CTRL_LIMIT; |
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103 | if (GPS_Roll < -GPS_CTRL_LIMIT) GPS_Roll = -GPS_CTRL_LIMIT; |
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104 | } |
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105 | |||
106 | |||
107 | void GPS_Main(void) |
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108 | { |
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741 | killagreg | 109 | static uint8_t GPS_Task = TSK_IDLE; |
1 | ingob | 110 | |
741 | killagreg | 111 | |
726 | killagreg | 112 | // poti2 enables the gps feature |
741 | killagreg | 113 | if(Poti2 < 70) GPS_Task = TSK_IDLE; |
114 | else if (Poti2 < 160) GPS_Task = TSK_HOLD; |
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746 | killagreg | 115 | else GPS_Task = TSK_HOME; // Poti2 >= 160 |
741 | killagreg | 116 | |
117 | |||
118 | switch(GPSInfo.status) |
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726 | killagreg | 119 | { |
741 | killagreg | 120 | case INVALID: // invalid gps data |
746 | killagreg | 121 | GPS_Neutral(); |
741 | killagreg | 122 | if(GPS_Task != TSK_IDLE) BeepTime = 50; // beep if signal is neccesary |
123 | break; |
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124 | case PROCESSED: // if gps data are already processed |
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125 | // downcount timeout |
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126 | if(GPSTimeout) GPSTimeout--; |
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127 | // if no new data arrived within timeout set current data invalid |
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128 | // and therefore disable GPS |
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129 | else |
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726 | killagreg | 130 | { |
746 | killagreg | 131 | GPS_Neutral(); |
741 | killagreg | 132 | GPSInfo.status = INVALID; |
133 | } |
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134 | break; |
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135 | case VALID: // new valid data from gps device |
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136 | // if the gps data quality is sufficient |
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137 | if (GPSInfo.satfix == SATFIX_3D) |
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138 | { |
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139 | switch(GPS_Task) // check what's to do |
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726 | killagreg | 140 | { |
741 | killagreg | 141 | case TSK_IDLE: |
142 | // update hold point to current gps position |
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143 | HoldPosition.Northing = GPSInfo.utmnorth; |
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144 | HoldPosition.Easting = GPSInfo.utmeast; |
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145 | HoldPosition.Status = VALID; |
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146 | // disable gps control |
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746 | killagreg | 147 | GPS_Neutral(); |
741 | killagreg | 148 | break; // eof TSK_IDLE |
149 | case TSK_HOLD: |
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150 | // if sticks are centered and hold position is valid enable position hold control |
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151 | if ((MaxStickPitch < 20) && (MaxStickRoll < 20) && (HoldPosition.Status == VALID)) |
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152 | { |
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153 | // Calculate deviation from hold position |
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154 | GPSPosDev_North = GPSInfo.utmnorth - HoldPosition.Northing; |
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155 | GPSPosDev_East = GPSInfo.utmeast - HoldPosition.Easting; |
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156 | DebugOut.Analog[12] = GPSPosDev_North; |
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157 | DebugOut.Analog[13] = GPSPosDev_East; |
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1 | ingob | 158 | |
746 | killagreg | 159 | GPS_PDController(); |
741 | killagreg | 160 | } |
161 | else // MK controlled by user |
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162 | { |
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163 | // update hold point to current gps position |
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164 | HoldPosition.Northing = GPSInfo.utmnorth; |
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165 | HoldPosition.Easting = GPSInfo.utmeast; |
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166 | HoldPosition.Status = VALID; |
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167 | // disable gps control |
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746 | killagreg | 168 | GPS_Neutral(); |
741 | killagreg | 169 | } |
170 | break; // eof TSK_HOLD |
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746 | killagreg | 171 | case TSK_HOME: |
172 | if(HomePosition.Status == VALID) |
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173 | { |
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174 | // update hold point to current gps position |
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175 | HoldPosition.Northing = GPSInfo.utmnorth; |
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176 | HoldPosition.Easting = GPSInfo.utmeast; |
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177 | HoldPosition.Status = VALID; |
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178 | |||
179 | // Calculate deviation from home position |
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180 | GPSPosDev_North = GPSInfo.utmnorth - HomePosition.Northing; |
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181 | GPSPosDev_East = GPSInfo.utmeast - HomePosition.Easting; |
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182 | DebugOut.Analog[12] = GPSPosDev_North; |
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183 | DebugOut.Analog[13] = GPSPosDev_East; |
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184 | |||
185 | GPS_PDController(); |
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186 | } |
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187 | else // bad home position |
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188 | { |
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189 | GPS_Neutral(); |
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190 | BeepTime = 50; // signal invalid home position |
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191 | } |
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192 | break; // eof TSK_HOME |
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741 | killagreg | 193 | default: // unhandled task |
746 | killagreg | 194 | GPS_Neutral(); |
741 | killagreg | 195 | break; // eof default |
196 | } // eof switch GPS_Task |
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197 | } // eof 3D-FIX |
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727 | killagreg | 198 | |
741 | killagreg | 199 | else // no 3D-SATFIX |
200 | { // disable gps control |
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746 | killagreg | 201 | GPS_Neutral(); |
741 | killagreg | 202 | if(GPS_Task != TSK_IDLE) BeepTime = 50; |
203 | } |
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204 | |||
205 | // set current data as processed to avoid further calculations on the same gps data |
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206 | GPSInfo.status = PROCESSED; |
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207 | break; |
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208 | } // eof GPSInfo.status |
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209 | DebugOut.Analog[14] = GPS_Pitch; |
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210 | DebugOut.Analog[15] = GPS_Roll; |
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726 | killagreg | 211 | } |
212 |