Rev 2139 | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2108 | - | 1 | #include <stdlib.h> |
| 2 | #include <avr/io.h> |
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| 3 | #include "eeprom.h" |
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| 4 | #include "flight.h" |
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| 5 | #include "output.h" |
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| 6 | |||
| 7 | // Necessary for external control and motor test |
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| 8 | #include "uart0.h" |
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| 9 | #include "timer2.h" |
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| 10 | #include "analog.h" |
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| 11 | #include "attitude.h" |
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| 12 | #include "controlMixer.h" |
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| 13 | #include "configuration.h" |
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| 14 | |||
| 15 | #define CHECK_MIN_MAX(value, min, max) {if(value < min) value = min; else if(value > max) value = max;} |
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| 16 | |||
| 17 | /* |
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| 18 | * target-directions integrals. |
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| 19 | */ |
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| 20 | int32_t target[3]; |
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| 21 | |||
| 22 | /* |
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| 23 | * Error integrals. |
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| 24 | */ |
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| 25 | |||
| 26 | int32_t maxError[3]; |
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| 27 | int32_t IPart[3] = { 0, 0, 0 }; |
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| 28 | PID_t airspeedPID[3]; |
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| 29 | |||
| 30 | int16_t controlServos[NUM_CONTROL_SERVOS]; |
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| 31 | |||
| 32 | /************************************************************************/ |
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| 33 | /* Neutral Readings */ |
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| 34 | /************************************************************************/ |
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| 35 | #define CONTROL_CONFIG_SCALE 10 |
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| 36 | |||
| 37 | void flight_setGround(void) { |
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| 38 | IPart[PITCH] = IPart[ROLL] = IPart[YAW] = 0; |
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| 39 | target[PITCH] = attitude[PITCH]; |
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| 40 | target[ROLL] = attitude[ROLL]; |
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| 41 | target[YAW] = attitude[YAW]; |
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| 42 | } |
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| 43 | |||
| 44 | void flight_updateFlightParametersToFlightMode(void) { |
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| 45 | debugOut.analog[16] = currentFlightMode; |
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| 2135 | - | 46 | |
| 2108 | - | 47 | // At a switch to angles, we want to kill errors first. |
| 48 | // This should be triggered only once per mode change! |
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| 49 | if (currentFlightMode == FLIGHT_MODE_ANGLES) { |
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| 50 | target[PITCH] = attitude[PITCH]; |
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| 51 | target[ROLL] = attitude[ROLL]; |
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| 52 | target[YAW] = attitude[YAW]; |
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| 53 | } |
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| 54 | |||
| 55 | for (uint8_t axis=0; axis<3; axis++) { |
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| 56 | maxError[axis] = (int32_t)staticParams.gyroPID[axis].iMax * GYRO_DEG_FACTOR; |
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| 57 | } |
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| 58 | } |
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| 59 | |||
| 60 | // Normal at airspeed = 10. |
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| 61 | uint8_t calcAirspeedPID(uint8_t pid) { |
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| 2132 | - | 62 | //if (!(staticParams.bitConfig & CFG_USE_AIRSPEED_PID)) { |
| 2108 | - | 63 | return pid; |
| 2132 | - | 64 | //} |
| 65 | } |
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| 2108 | - | 66 | |
| 67 | void setAirspeedPIDs(void) { |
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| 68 | for (uint8_t axis = 0; axis<3; axis++) { |
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| 69 | airspeedPID[axis].P = calcAirspeedPID(dynamicParams.gyroPID[axis].P); |
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| 70 | airspeedPID[axis].I = calcAirspeedPID(dynamicParams.gyroPID[axis].I); // Should this be??? |
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| 71 | airspeedPID[axis].D = dynamicParams.gyroPID[axis].D; |
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| 72 | } |
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| 73 | } |
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| 74 | |||
| 75 | /************************************************************************/ |
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| 76 | /* Main Flight Control */ |
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| 77 | /************************************************************************/ |
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| 78 | void flight_control(void) { |
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| 79 | // Mixer Fractions that are combined for Motor Control |
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| 80 | int16_t term[4]; |
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| 81 | |||
| 82 | // PID controller variables |
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| 83 | int16_t PDPart[3]; |
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| 84 | |||
| 85 | static int8_t debugDataTimer = 1; |
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| 86 | |||
| 87 | // High resolution motor values for smoothing of PID motor outputs |
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| 88 | // static int16_t outputFilters[MAX_OUTPUTS]; |
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| 89 | |||
| 90 | uint8_t axis; |
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| 91 | |||
| 92 | setAirspeedPIDs(); |
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| 93 | |||
| 94 | term[CONTROL_THROTTLE] = controls[CONTROL_THROTTLE]; |
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| 95 | |||
| 96 | // These params are just left the same in all modes. In MANUAL and RATE the results are ignored anyway. |
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| 2132 | - | 97 | int32_t tmp; |
| 2108 | - | 98 | |
| 2132 | - | 99 | tmp = ((int32_t)controls[CONTROL_ELEVATOR] * staticParams.stickIElevator) >> LOG_STICK_SCALE; |
| 2139 | - | 100 | if (staticParams.servos[PITCH].reverse) target[PITCH] += tmp; else target[PITCH] -= tmp; |
| 2132 | - | 101 | |
| 102 | tmp = ((int32_t)controls[CONTROL_AILERONS] * staticParams.stickIAilerons) >> LOG_STICK_SCALE; |
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| 2139 | - | 103 | if (staticParams.servos[ROLL].reverse) target[ROLL] += tmp; else target[ROLL] -= tmp; |
| 2132 | - | 104 | |
| 105 | tmp = ((int32_t)controls[CONTROL_RUDDER] * staticParams.stickIRudder) >> LOG_STICK_SCALE; |
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| 2139 | - | 106 | if (staticParams.servos[YAW].reverse) target[YAW] += tmp; else target[YAW] -= tmp; |
| 2132 | - | 107 | |
| 2108 | - | 108 | for (axis = PITCH; axis <= YAW; axis++) { |
| 109 | if (target[axis] > OVER180) { |
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| 110 | target[axis] -= OVER360; |
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| 111 | } else if (target[axis] <= -OVER180) { |
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| 112 | target[axis] += OVER360; |
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| 113 | } |
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| 114 | |||
| 2135 | - | 115 | int32_t error = attitude[axis] - target[axis]; |
| 2108 | - | 116 | |
| 2132 | - | 117 | #define ROTATETARGET 1 |
| 118 | // #define TRUNCATEERROR 1 |
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| 119 | |||
| 120 | #ifdef ROTATETARGET |
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| 2135 | - | 121 | //if(abs(error) > OVER180) { // doesnt work!!! |
| 122 | if(error > OVER180 || error < -OVER180) { |
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| 2132 | - | 123 | // The shortest way from attitude to target crosses -180. |
| 124 | // Well there are 2 possibilities: A is >0 and T is < 0, that makes E a (too) large positive number. It should be wrapped to negative. |
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| 125 | // Or A is <0 and T is >0, that makes E a (too) large negative number. It should be wrapped to positive. |
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| 2135 | - | 126 | if (error > 0) { |
| 127 | if (error < OVER360 - maxError[axis]) { |
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| 2132 | - | 128 | // too much err. |
| 2135 | - | 129 | error = -maxError[axis]; |
| 2132 | - | 130 | target[axis] = attitude[axis] + maxError[axis]; |
| 131 | if (target[axis] > OVER180) target[axis] -= OVER360; |
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| 132 | } else { |
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| 133 | // Normal case, we just need to correct for the wrap. Error will be negative. |
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| 2135 | - | 134 | error -= OVER360; |
| 2132 | - | 135 | } |
| 136 | } else { |
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| 2135 | - | 137 | if (error > maxError[axis] - OVER360) { |
| 2132 | - | 138 | // too much err. |
| 2135 | - | 139 | error = maxError[axis]; |
| 2132 | - | 140 | target[axis] = attitude[axis] - maxError[axis]; |
| 141 | if (target[axis] < -OVER180) target[axis] += OVER360; |
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| 142 | } else { |
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| 143 | // Normal case, we just need to correct for the wrap. Error will be negative. |
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| 2135 | - | 144 | error += OVER360; |
| 2132 | - | 145 | } |
| 146 | } |
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| 147 | } else { |
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| 148 | // Simple case, linear range. |
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| 2135 | - | 149 | if (error > maxError[axis]) { |
| 150 | error = maxError[axis]; |
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| 2132 | - | 151 | target[axis] = attitude[axis] - maxError[axis]; |
| 2135 | - | 152 | } else if (error < -maxError[axis]) { |
| 153 | error = -maxError[axis]; |
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| 2132 | - | 154 | target[axis] = attitude[axis] + maxError[axis]; |
| 155 | } |
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| 156 | } |
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| 157 | #endif |
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| 158 | #ifdef TUNCATEERROR |
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| 2135 | - | 159 | if (error > maxError[axis]) { |
| 160 | error = maxError[axis]; |
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| 161 | } else if (error < -maxError[axis]) { |
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| 162 | error = -maxError[axis]; |
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| 2132 | - | 163 | } else { |
| 164 | // update I parts here for angles mode. I parts in rate mode is something different. |
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| 2108 | - | 165 | } |
| 2132 | - | 166 | #endif |
| 2108 | - | 167 | |
| 168 | /************************************************************************/ |
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| 169 | /* Calculate control feedback from angle (gyro integral) */ |
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| 170 | /* and angular velocity (gyro signal) */ |
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| 171 | /************************************************************************/ |
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| 172 | if (currentFlightMode == FLIGHT_MODE_ANGLES || currentFlightMode |
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| 173 | == FLIGHT_MODE_RATE) { |
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| 174 | PDPart[axis] = (((int32_t) gyro_PID[axis] |
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| 175 | * (int16_t) airspeedPID[axis].P) >> LOG_P_SCALE) |
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| 176 | + ((gyroD[axis] * (int16_t) airspeedPID[axis].D) |
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| 177 | >> LOG_D_SCALE); |
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| 178 | } else { |
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| 179 | PDPart[axis] = 0; |
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| 180 | } |
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| 181 | |||
| 182 | if (currentFlightMode == FLIGHT_MODE_ANGLES) { |
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| 2135 | - | 183 | int16_t anglePart = (int32_t)(error * (int32_t) airspeedPID[axis].I) >> LOG_I_SCALE; |
| 2132 | - | 184 | PDPart[axis] += anglePart; |
| 2108 | - | 185 | } |
| 2132 | - | 186 | |
| 2108 | - | 187 | // Add I parts here... these are integrated errors. |
| 2139 | - | 188 | if (staticParams.servos[axis].reverse) |
| 2132 | - | 189 | term[axis] = controls[axis] - PDPart[axis]; // + IPart[axis]; |
| 190 | else |
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| 191 | term[axis] = controls[axis] + PDPart[axis]; // + IPart[axis]; |
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| 2108 | - | 192 | } |
| 193 | |||
| 194 | for (uint8_t i = 0; i < NUM_CONTROL_SERVOS; i++) { |
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| 195 | int16_t tmp; |
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| 196 | if (servoTestActive) { |
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| 2132 | - | 197 | controlServos[i] = ((int16_t) servoTest[i] - 128) * 8; |
| 2108 | - | 198 | } else { |
| 199 | // Follow the normal order of servos: Ailerons, elevator, throttle, rudder. |
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| 200 | switch (i) { |
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| 201 | case 0: |
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| 202 | tmp = term[ROLL]; |
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| 203 | break; |
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| 204 | case 1: |
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| 205 | tmp = term[PITCH]; |
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| 206 | break; |
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| 207 | case 2: |
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| 208 | tmp = term[THROTTLE]; |
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| 209 | break; |
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| 210 | case 3: |
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| 211 | tmp = term[YAW]; |
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| 212 | break; |
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| 213 | default: |
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| 214 | tmp = 0; |
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| 215 | } |
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| 216 | // These are all signed and in the same units as the RC stuff in rc.c. |
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| 217 | controlServos[i] = tmp; |
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| 218 | } |
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| 219 | } |
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| 220 | |||
| 221 | calculateControlServoValues(); |
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| 222 | |||
| 223 | // +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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| 224 | // Debugging |
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| 225 | // +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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| 226 | if (!(--debugDataTimer)) { |
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| 227 | debugDataTimer = 24; // update debug outputs at 488 / 24 = 20.3 Hz. |
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| 228 | debugOut.analog[0] = gyro_PID[PITCH]; // in 0.1 deg |
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| 229 | debugOut.analog[1] = gyro_PID[ROLL]; // in 0.1 deg |
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| 230 | debugOut.analog[2] = gyro_PID[YAW]; |
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| 231 | |||
| 232 | debugOut.analog[3] = attitude[PITCH] / (GYRO_DEG_FACTOR / 10); // in 0.1 deg |
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| 233 | debugOut.analog[4] = attitude[ROLL] / (GYRO_DEG_FACTOR / 10); // in 0.1 deg |
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| 234 | debugOut.analog[5] = attitude[YAW] / (GYRO_DEG_FACTOR / 10); |
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| 235 | |||
| 236 | debugOut.analog[6] = target[PITCH] / (GYRO_DEG_FACTOR / 10); // in 0.1 deg |
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| 237 | debugOut.analog[7] = target[ROLL] / (GYRO_DEG_FACTOR / 10); // in 0.1 deg |
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| 238 | debugOut.analog[8] = target[YAW] / (GYRO_DEG_FACTOR / 10); |
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| 239 | |||
| 2135 | - | 240 | debugOut.analog[12] = term[PITCH]; |
| 241 | debugOut.analog[13] = term[ROLL]; |
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| 242 | debugOut.analog[14] = term[YAW]; |
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| 243 | debugOut.analog[15] = term[THROTTLE]; |
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| 2108 | - | 244 | } |
| 245 | } |